Multi-Gas Monitor
P/N 1706-3421
REV 03 Printed 0900-2000
Specifications Subject to Change
ATX612
GUARANTEED.
FOR LIFE.
1001 Oakdale Road, Oakdale, PA 15071-1500
(412) 788-4353 • Toll Free 1-800-DETECTS
FAX 412-788-8353 • Service Dept. 1-888-788-4353
Instruction
Manual
INDUS TRIAL S CIENTIFIC
CORP ORATION
Dear Valued Customer,
Thank you for buying and using Industrial Scientific’s
Model ATX612 Multi-Gas Monitor.
Your ATX612 can be relied upon for dependable service,
day after day. It has been designed, manufactured, tested
and proven under the most scrutinizing conditions
possible. With the minimal care and maintenance
described in this Instruction Manual, it will provide you
with years of reliable monitoring.
I am most concerned that you be pleased with the
performance of your ATX612 in the months and years
ahead. I urge you to call us with any questions or
comments you may have. Often times a phone call and a
question can save you hours of frustration. Please never
hesitate to contact me at 1-800-DETECTS (338-3287).
All of us at Industrial Scientific appreciate the opportunity
to serve you.
Sincerely,
Kent D. McElhattan
President & CEO
Industrial Scientific Corporation
1
TABLE OF CONTENTS
1. WARNINGS AND CAUTIONARY STATEMENTS
2. UNPACKING THE INSTRUMENT
3. ATX612 F
3
4
WARNINGS AND CAUTIONARY STATEMENTS
1.
4. INSTRUMENETAOTURES
PERATION
4
5
Failure to perform certain procedures or note certain
conditions may impair the performance of the
instrument. For maximum safety and performance,
please read and follow the procedures and conditions
outlined below.
4
.1 Charging the Battery
5
4.1.1 Alkaline Battery Option
.2 Turning the ATX612 On and Off
8
4
8
4.3 Display Backlight
4.4 Internal Sampling Pump
4.5 Operating Modes
4.5.1 Reading
8
8
9
9
!
Oxygen deficient atmospheres may cause combustible
4.5.2 Sensor Configuration
4.5.3 PPM Hydrocarbon
4.5.4 Zero
9
9
gas readings to be lower than actual concentrations.
9
4.5.5 Peak
9
!
Oxygen enriched atmospheres may cause combustible
4.5.6 Peak Clear
10
10
10
10
10
10
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gas readings to be higher than actual concentrations.
4.5.7 Date
4.5.8 Cal Date
!
Calibrate the combustible gas sensor after each
4.5.9 Log Time
incident where the combustible gas content causes the
instrument to latch in the OVER-RANGE alarm condition.
4.5.10 TWA
4.5.11 STEL
4.5.12 Hygiene Reset
4.6 Alarm Indicators
4.6.1 Low Alarm
!
Silicone compound vapors may affect the combustible
gas sensor and cause readings of combustible gas to be
lower than actual gas concentrations. If the instrument has
been used in an area where silicone vapors were present,
always calibrate the instrument before next use to ensure
accurate measurements.
4.6.2 High Alarm
4.6.3 Over-Range Indication
4.6.4 Combustible Gas Over-Range
4.6.5 Low Battery Warning
4.6.6 Battery Failure
4.6.7 Fault Indication
5.
C
ATX612
6. CAHLAINBGRIANTGING THE
INSTRUMENT SETTINGS
!
Sensor openings and water barriers must be kept clean.
6
.1 Setspan
Obstruction of the sensor openings and/or contamination
of the water barriers may cause readings to be lower than
actual gas concentrations.
6.2 Alarms
6.3 Code
7. HYGIENE/DATALOGGING FUNCTIONS
7.
1
Definition of Terms
7.1.1 Data Log
7.1.2 Period
!
Sudden changes in atmospheric pressure may cause
temporary fluctuations in the oxygen reading.
7.1.3 Logging Session
7.1.4 Real Time Clock
7.1.5 Log Time Clock
7.1.6 Calendar
7.1.7 TWA
7.1.8 STEL
!
Recharge battery only in a non-hazardous location.
!
Use the RS-232 port only in a non-hazardous location.
!
Instrument is tested for intrinsic safety in explosive
7.2 Principles of Operation
7.3 Resetting the Hygiene Functions
7.4 Downloading the ATX612
8. MAINTENANCE
gas/air (21% oxygen) mixtures only.
CAUTION: High Over-Range (+OR) combustible
!
gas readings may indicate an
8.1 Cleaning
8.2 Changing the Battery
explosive concentration of
combustible gas.
8.2.1 Replacing the Nicad Battery Module
8.2.2 Replacing Alkaline Battery Cells
8.3 Opening the Instrument for Service
8.4 Installing or Changing Sensors
8.4.1 Toxic/Oxygen Sensor Removal/Replacement
8.4.2 Combustible Sensor Removal/Replacement
8.5 Changing the Internal Filter
9. REPLACEMENT PARTS
10. SPECIFICATIONS
11. DEFAULT ALARM SETTINGS
12. ATX612 OPTIONS & ORDERING INFORMATION
13. WARRANTY
26
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2
3
• 90 dB audible and ultra-bright visual alarm indicators.
• Optional external audible or vibrating alarms.
UNPACKING THE INSTRUMENT
2.
3.
• High and low alarms for combustible and toxic gases;
enrichment and depletion alarms for oxygen.
The shipping box should contain the following items.
Account for each item before discarding the box.
• User selectable latching alarms.
QUANTITY PART NUMBER
DESCRIPTION
• User selectable access code for security of calibration
and alarm settings.
1
1
1
1
1
1810-2707
1706-3421
1706-3256
1810-0628
1810-3077
ATX612 Multi-Gas Monitor
ATX612 Instruction Manual
Maintenance Tool
Shoulder Strap
Charging Adapter
(with Nicad Battery Only)
Power Cord
• Combustible gas OVER-RANGE protection.
• PEAK reading mode.
• Press and hold power switch to prevent accidental turn
ON or turn OFF.
1
1705-1710
• Hygiene/Datalogging option that can be installed by the
factory or the customer, to provide short term exposure
limit (STEL) and time-weighted average (TWA)
readings with 110 hours datalogging capacity.
After unpacking, if any listed item is missing, contact
either your local distributor of Industrial Scientific products,
or call Industrial Scientific Corporation at 1-800-DETECTS
(338-3287) in the United States and Canada, or
412-788-4353.
• The ATX612 is classified as intrinsically safe by the
following agencies:
ATX612 FEATURES
- Underwriters Laboratories (UL).
- Canadian Standards Association (CSA). Canadian
Standards Association has assessed only the
combustible gas portion of this instrument for
performance.
The Industrial Scientific ATX612 Multi-Gas Monitor may
be configured to continuously monitor one, two, three or
four gases in any combination of the following:
- Mine Safety and Health Administration (MSHA).
- Workcover Authority, NSW, Australia.
- Department of Mineral Resource, NSW, Australia.
- CENELEC (DEMKO)
• Oxygen
• Combustible gases (%LEL) or methane (% by volume
CH4). User selects %LEL or %CH4 prior to calibration.
• Any two of the following toxic gases:
Carbon Monoxide
Hydrogen Sulfide
Sulfur Dioxide
Chlorine
Nitrogen Dioxide
Chlorine Dioxide
INSTRUMENT OPERATION
4.
4.1 CHARGING THE BATTERY (NICAD BATTERY OPTION)
If the ATX612 is equipped with a Nicad battery pack, fully
charge the battery pack before use. A universal charging adapter
is included with the unit for charging the ATX612 battery pack.
The battery pack may be charged while attached to the
instrument or when removed to allow round-the-clock operation
of the ATX612 using a spare battery.
• The ATX612 automatically recognizes and displays the
installed sensors when switched on.
• One-Button calibration (microprocessor controlled).
• Built-in pump for remote gas sampling.
• Backlit display for viewing in low light conditions.
The ATX612 is equipped with a nickel-cadmium battery pack
with a built-in “smart” charging system. When plugged into the
charging adapter, the battery will recharge at a high rate until
fully charged and then will reduce to a maintenance trickle
charge rate. The battery will not be damaged if it is left
connected to the charger for extended periods.
• Round-the-clock monitoring capability using the
interchangeable rechargeable nickel-cadmium (Nicad) or
replaceable alkaline battery packs.
• Plug-in sensors that can be changed or replaced without
special tools or soldering equipment.
4
5
A dead battery will be fully recharged in 4.5 hours. The
Nicad battery pack has a LED charge status indicator to
show the current status when connected to the charger.
The LED indicator has five states as follows:
Infrared Data Interface
Pump Exhaust Port
Charging Socket
(Nicad Versions)
• Solid Amber:
• Solid Green:
Fast charge in progress
Fully charged, in trickle
charge mode
Battery too hot/cold to be
fast charged, in trickle
charge mode
• Flashing Green:
Gas Sample Inlet
Fitting
• Flashing Amber:
Instrument running, fast
charge mode
• Alternating Green/Amber: Trouble, electrical problem
in battery pack
0 0
21.0 0
Battery Status
Indicator
A fully charged Nicad battery pack will typically operate a
four-gas configured ATX612 for up to 16 hours. When the
instrument is in the normal viewing mode, an eight-
segment battery status indicator continuously displays the
battery condition. Each segment represents approximately
2 hours of operating time. When the battery is fully
discharged, the display will read BATTERY FAIL and the
instrument will emit a short beep once a second (See
Section 4.6.6). Turn off the instrument and recharge the
battery pack when BATTERY FAIL appears.
Battery Pack
Hex Screws
Shoulder Strap/
Optional Handle
Attachment
Figure 2
WARNING: Recharge Nicad battery pack only in a
!
non-hazardous location.
Ultra-bright Visual
Alarm Light Bar
%
PPM
Display
BATT
LEL
OXYGEN
INDUS TRIAL
S CIENTIFIC
ATX6 1 2
Hidden (-) Key
Hidden (+) Key
E
ON/ OFF MODE
External Alarm Jack
Enter/Backlight Key
Alarm Speaker
On/Off/Mode Key
Interchangeable Nicad
or Alkaline Battery
Pack
Figure 1
Figure 3
6
7
The remote sample tube should be connected to the barbed
inlet fitting on the bottom of the ATX612 (See Figure 3).
4.1.1 ALKALINE BATTERY OPTION
The ATX612 is available with an optional alkaline battery
pack which will typically operate continuously for up to
20 hours using 6 C-cell batteries.
NOTE: When drawing a remote sample, allow 2 seconds
per foot (0.3 meter) of tubing length in addition to
the normal sensor response time before observing
the instrument readings.
WARNING: Replace alkaline battery cells only in a
!
non-hazardous location. Use only Duracell, Energizer,
Procell, Panasonic, Varta or Kodak C-cell alkaline batteries. Use
of another battery type may present a risk of fire or explosion
and will violate the intrinsic safety certification of the ATX612.
The instrument is protected from drawing liquid and dust
into the pump and sensors by an internal 1.2 micron dust
filter/water stop.
4.2 TURNING THE ATX612 ON AND OFF
4.5 OPERATING MODES
• Press and hold the ON/OFF/MODE switch. The display
will read HOLD and the instrument sounds a short beep
once a second.
The ATX612 offers different operating modes to access
various instrument features. To scroll through the
operating modes, press and release the MODE switch. The
operating modes will appear in the following order:
HOLD
• Continue holding the MODE switch for 5 beeps until the
RELEASE screen appears. (Stop here if turning the
instrument off.)
O 0
4.5.1 READING
RELEASE
21.0 0
This is the normal operating mode. The current reading of
all sensors is displayed along with the graphical battery
charge indicator.
• After the instrument is turned ON, the following startup
screens will be displayed:
ATX612
VER 1.0
SOFTWARE VERSION: The version of the operating
software installed in the instrument is displayed.
CO H2S
02 LEL
4.5.2 SENSOR CONFIGURATION
This mode will display the type of sensor in the position in
which it is installed in the instrument.
SENSOR CONFIGURATION. The type of sensors
installed in the instrument will be displayed.
CO H2S
02 LEL
WARM-UP TIMER. The display will indicate the
number of seconds remaining until the instrument begins
normal operation.
PPM EXP
0
4.5.3 PPM HYDROCARBON
This mode displays the level of total hydrocarbons with 50
PPM resolution. The PPM reading may be rezeroed at
anytime by pressing the enter (E) key. The display will
return to the normal operating mode if the gas
concentration exceeds the LEL alarm level set in the
instrument.
After the warm-up sequence has been completed, the
ATX612 will enter the normal operating mode and will
be continuously monitoring all calibrated sensors.
5
4.3 DISPLAY BACKLIGHT
4.5.4 ZERO
ZERO
This mode allows the user to zero the instrument and
calibrate all installed sensors. Refer to Section 5,
Calibrating the ATX612, for instruction on the use of the
automatic zero and calibration functions.
The display backlight is automatically switched on when
the ATX612 is in an alarm condition. To manually activate
the backlight, press and release the (E) key. The backlight
will remain on for approximately 15 seconds.
PRESS
4.5.5 PEAK
65P 8
4.4 INTERNAL SAMPLING PUMP
This mode will display the highest level of toxic and
combustible gas and the lowest level of oxygen measured
since the peak readings were last cleared.
19.3K 12
The ATX612 is equipped with a built-in pump for remote
gas sampling. The sampling pump will draw a constant flow
sample from up to 100 feet (30 meters) using 1/8 inch (3
mm) diameter tubing.
8
9
4.6.2 HIGH ALARM
4.5.6 PEAK CLEAR
PK CLR
PRESS
When a monitored gas concentration reaches the high
alarm level setpoint, the instrument emits a continuous dual
tone alarm. As with the low alarm condition, the red alarm
light bar and backlight will flash simultaneously with the
displayed gas value. If the hygiene/datalogging option is
installed, the STEL alarm will mimic the high alarm
indicator and the STEL display value in alarm will flash.
This mode will clear all stored peak readings from the
instrument. Press enter (E) to clear the peak readings. The
display will return to the PEAK mode and indicate that the
peak readings have been reset.
If the hygiene/datalogging option is installed, the following
operating modes may also be accessed. See Section 7,
Hygiene/Datalogging Functions, for further instructions.
NOTE: The ATX612 uses the continuous high alarm tone
for both low (depletion) and high (enrichment)
oxygen alarm conditions.
4.5.7 DATE
This screen allows the user to see the current date
(month/day).
DATE
5/21
4.6.3 OVER-RANGE INDICATION
+OR 0
21.0 0
4.5.8 CAL DATE
This mode allows the user to see the date the instrument
was last calibrated.
An over-range condition occurs when a sensor reading
exceeds the upper limit of the instrument display range.
Over-Range is indicated by +OR in the appropriate sensor
display location. With the exception of combustible gas
over-range, all over-range conditions will clear
automatically when the gas concentrations have decreased
to levels within the display range of the instrument.
CALDATE
5/13
4.5.9 LOG TIME
RT06:45
LT01:15
This mode allows the user to view the current real time
(RT) and the length of time that data has been recorded in
the current session (LT).
4.6.4 COMBUSTIBLE GAS OVER-RANGE
4.5.10 TWA (Time-Weighted Average)*
This mode displays the current time-weighted average
exposure values of the toxic sensors.
When the ATX612 detects combustible gases in excess of
100% of LEL (5% CH4 by volume), a high alarm
condition is latched (locked on) and +OR is displayed in
place of the combustible gas reading. Power is removed
from the combustible gas sensor to prevent damage due to
the high level of combustible gas.
0 0
TWA
4.5.11 STEL (Short Term Exposure Limit)*
This mode displays the short term average exposure values
of the toxic sensors installed in the instrument.
0 0
STEL
To clear the combustible gas over-range alarm:
O 0
• Exit the hazardous area immediately.
• Press (E) key in clean air.
4.5.12 HYGIENE RESET
This mode allows the user to reset the hygiene session and
the STEL and TWA exposure values.
21.0 +OR
HYGIENE
PRESS
NOTE: When the instrument is turned on, the combustible
gas level must be less than 100% of LEL (5%
CH4) to clear the combustible gas over-range
condition.
TWA and STEL
*
4.6 ALARM INDICATORS
4.6.1 LOW ALARM
When a monitored gas concentration reaches the low level
alarm setpoint, the instrument emits a short beep
approximately every 1.2 seconds. The red alarm light bar
and backlight will flash simultaneously along with the
displayed gas value. If the hygiene/datalogging option is
installed, the TWA alarm will mimic the low alarm
indicator and the TWA display value in alarm will flash.
readings do not
apply to oxygen
and combustible
gas exposure.
4.6.5 LOW BATTERY WARNING
With 15-60 minutes of run time remaining, the ATX612
will emit a short beep once every 60 seconds and the
battery status indicator will be replaced with a flashing
“B” to indicate the low battery condition.
O 0
21.0 0
B
NOTE: The length of warning time will increase when
there is no combustible gas sensor installed in the
instrument.
11
10
If an instrument fails to operate properly following any
functional “bump” test, a full instrument calibration
should be performed prior to use.
4.6.6 BATTERY FAILURE
BATTERY
FAIL
When the battery has insufficient charge to operate the
instrument, “BATTERY FAIL” is displayed. The visual
alarm will be activated and the instrument will emit a
short beep once every second for approximately 30
seconds after which the instrument will turn itself off.
Recharge or replace the battery (See Section 8.2).
Calibration is most accurate when the instrument has been
in a stable temperature environment for at least one hour
prior to calibrating.
NOTE: Instrument zero and oxygen span calibration
should be performed in clean air containing
20.95% (21%) oxygen. If you are measuring a
known combustible gas, use a known
4.6.7 FAULT INDICATION
The ATX612 will emit a short beep once a second if a
newly installed sensor does not agree with the previous
sensor type for that position. The corresponding display
position will be blank. This fault indication also occurs
when a sensor becomes disconnected or a combustible
sensor fault is detected during normal operation. Installed
sensor types are accepted and displayed only after a
successful calibration has been completed.
concentration of that gas for calibration. For
general combustible gas measurement, Industrial
Scientific Corporation recommends calibrating to
pentane in the 15-50% LEL range. The measured
LEL concentration of gases other than the
calibration gas may not correspond on a one-to-
one basis with the monitor reading. Always use
teflon or teflon-lined tubing when calibrating.
The sampling pump system is equipped with a low flow
detection alarm. A low flow alarm condition will occur if
the dust filter/water stop becomes clogged or the sample
line becomes blocked in any way. The instrument will
sound a continuous tone, the red alarm light bar will flash
and the display will read PUMP FAULT. If this should
occur, replace the dust filter/water stop immediately (See
Section 9). The unit will not operate and a low flow alarm
condition will remain if the dust filter/water stop is
removed from the instrument. The PUMP FAULT alarm
will be reset once the obstruction has been cleared from
the sample line.
The ATX612 utilizes a one-button calibration system.
When using multi-gas cylinders, a full instrument
calibration can be performed in a single step. Multi-gas
cylinders are available for the most common instrument
configurations.
PUMP
FAULT
To calibrate the ATX612:
• From the normal READING mode, press the MODE
switch twice to access the ZERO operating mode.
ZERO
PRESS
• Press the (E) key to start the instrument zeroing process.
The instrument display will indicate ZEROING.
• When zeroing is complete the instrument display will
indicate O2 CAL and will show the current full span
value of the oxygen sensor. The oxygen sensor will be
calibrated to 21.0 in approximately 30 seconds.
ZEROING
CALIBRATING THE ATX612
5.
The ATX612 is a potential life saving device. Recognizing
this fact, Industrial Scientific Corporation recommends
that a functional (“bump”) test be performed on every
instrument prior to each use. A functional test is defined as
a brief exposure of the monitor to a known concentration
of gas(es) for the purpose of verifying sensor and alarm
operation. It is not intended to be a measure of the
accuracy of the instrument.
Instrument zeroing and oxygen calibration may be aborted
at any time by pressing the MODE switch.
21.0
02 CAL
NOTE: Zeroing the instrument in clean air is preferred,
provided that there is no trace of toxic or
combustible gas. If the air purity is uncertain, use
a cylinder of zero grade air to zero the instrument
and span the oxygen sensor.
Industrial Scientific also recommends that a full
instrument calibration be performed using a certified
concentration(s) of calibration gas(es) monthly to ensure
maximum accuracy.
• At the completion of the oxygen sensor calibration, the
instrument will emit a short beep and the display will
indicate GO CAL. The message PRESS (E) to CAL will
scroll across the bottom of the display. Press (E) to
continue calibrating the remaining sensors. If you ignore
this message the instrument will return to the normal
operating mode in approximately eight seconds.
13
12
• To continue full calibration, press (E) and the instrument
will display the first sensor to be calibrated along with
the calibration gas setting. The message APPLY CAL
GAS will scroll across the bottom of the display.
GO CAL
PRESS
CHANGING INSTRUMENT SETTINGS
Instrument settings, including alarm values, calibration gas
concentrations and security code, may only be accessed
and changed during the instrument startup sequence.
6.
NOTE: If the gas concentration does not match the
setting, press the MODE switch to abort
calibration. See Section 6.1, SETSPAN to change
the calibration gas settings.
25 LEL
APPLY
The (+) and (-) hidden keys are used to set instrument
alarm and calibration values. Refer to page 6, Figure 1 for
the location of the hidden keys.
NOTE: APPLY CAL GAS means connect the sample
tubing to the appropriate calibration gas cylinder
with either a ILPM or preferrably a demand flow
regulator. Connect the tubing to the gas sample
inlet of the ATX612. Turn on gas supply.
To access the instrument menus:
• Turn the ATX612 off and back on again.
• When the display shows the warm up timer, press the
plus (+) and minus (-) keys simultaneously.
• Apply the calibration gas. The instrument will wait for
five minutes to sense that calibration gas has been
applied before aborting and failing calibration. When the
sensor detects a gas concentration greater than 50% of
the calibration gas value, the display will indicate the
current full span value for that sensor. The message CAL
IN PROGRESS will scroll across the bottom of the
display.
If the instrument security code has been set to a value
other than “0”, the CODE screen will be displayed along
with the scrolling prompt PRESS (+) OR (-) TO SET (E)
TO ENTER. Use the (+) and (-) keys to input the correct
security code value and press (E). When the correct code
has been entered successfully, the instrument will
immediately enter the settings mode.
CODE 0
PRESS
• When calibration of the sensor has been successfully
completed, the instrument will automatically step to the
next sensor to be calibrated and the preceding step will
be repeated.
The settings mode consists of three functions:
SETSPAN
ALARMS
CODE
• When all sensors have been calibrated successfully the
instrument will emit a short beep and the sensor
configuration will be shown on the display.
The scrolling prompt, PRESS (+) FOR NEXT (E) TO
SELECT appears on each screen. Press the (+) to step
through the list and (E) to select any of the functions.
Pressing the MODE switch at any one of the functions
will cause the instrument to return to the normal
operating mode.
• If calibration results in marginal sensor span values,
sensor identifiers will flash on the display. Marginal
calibration will occur if the sensor full span value is less
than 70% of the applied gas concentration. A marginal
sensor calibration may be an early warning sign that the
sensor will soon need to be replaced.
6.1 SETSPAN
NOTE: If the sensor full span value is less than 50% of
the calibration gas value, calibration will fail and
the instrument will immediately return to the real
time READING mode. When failed calibration or
low sensitivity is indicated, verify that the
The SETSPAN function allows the user to set the
combustible sensor monitoring range to either LEL or CH4
and to set the calibration gas values for the combustible
and toxic sensors.
SETSPAN
PRESS
calibration cylinder has not emptied or that the
cylinder expiration date has not passed.
• After displaying the sensor configuration, the
instrument will automatically return to the real time
READING mode.
15
14
• Press (E) to enter the SETSPAN function. The display
will show LEL along with the prompt PRESS (+) TO
CHANGE.
• Press (+) to step to the INSTANT function and set
instantaneous alarm values. The display will indicate
INSTANT along with the scrolling prompt PRESS (+)
FOR NEXT (E) TO SELECT.
LEL
INSTANT
PRESS
PRESS
• Press (+) to toggle between LEL and CH4 combustible
sensor span ranges.
• Press (E) to enter the instantaneous alarms function. The
display will show the first alarm to be set along with the
scrolling prompt PRESS (+) FOR NEXT (E) TO
SELECT. The alarm type will be indicated on the display
as either high (H) or low (L).
10L LEL
PRESS
25 LEL
PRESS
• Press MODE to enter the calibration gas values for all
sensors. The display will show the first span value, eg.
25 LEL, along with the prompt PRESS (+) FOR NEXT
(E) TO SELECT.
• Press (E) to select the desired alarm to be changed. The
display will flash the current alarm value along with the
prompt PRESS (+) OR (-) TO SET (E) TO SELECT.
• Press (E) to select the value you wish to change. The
display will flash the current gas value and will scroll the
prompt PRESS (+) or (-) TO SET (E) TO ENTER.
• Press the (+) and (-) keys to set the desired alarm value
and (E) to enter the value into memory.
• Press the (+) and (-) minus keys to set the desired
calibration gas value and (E) to enter the value into
memory. Once the value has been entered into memory,
it will become the standard gas value used during
instrument calibration.
• Press MODE to return to the INSTANT function.
• Press (+) to step to the TWA and STEL alarm functions.
The TWA and STEL alarm values are set as
previously described.
• Press the MODE switch to return to the SETSPAN
function.
6.3 CODE
6.2 ALARMS
CODE
The CODE function allows the user to select a security
code to protect calibration and all instrument alarm
settings. When the code is set to any value other than “0”,
the user will be prompted to enter the proper code prior to
entering the settings or calibration modes.
The ALARMS function allows you to set the values for
the HI and LOW alarms for each installed sensor. Default
alarm settings for each gas are listed in Section 11. If the
hygiene/datalogging option is installed, you will also be
able to set the STEL and TWA alarm values.
PRESS
CODE 123
PRESS
• Press (+) to step from the ALARMS function to the
CODE function.
• Press (+) to step from the SETSPAN function to the
ALARMS function.
LATCH
• Press (E) to enter the code function. The display will
show the current code setting along with the scrolling
prompt PRESS (+) OR (-) TO SET (E) TO ENTER.
• Press (E) to enter the ALARMS function. The LATCH
function will lock the alarm indicators on when a
monitored gas concentration reaches the high alarm
setpoint. The alarm will reset after the gas concentration
has fallen below the alarm setpoint and the user has
pressed the (E) key. The display will indicate LATCH
along with the scrolling prompt PRESS (+) FOR NEXT
(E) to SELECT.
• Press the (+) and (-) keys to set the code to any value
between 0 and 999, and (E) to enter the value
into memory.
ALARMS
PRESS
• Press MODE to return to the CODE function.
LATCH
PRESS
• Press (E) to select the LATCH function. The display will
indicate LATCH along with the prompt PRESS (+) FOR
NEXT (E) TO SELECT.
HYGIENE/DATALOGGING FUNCTIONS
7.
OFF
7.1 DEFINITION OF TERMS
• Press (E) to set the ATX612 high alarm latch as ON or
OFF. Press MODE to return to the LATCH screen.
PRESS
7.1.1 DATA LOG
The record of measured gas concentrations, including time
and date, stored in the instrument’s electronic memory.
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The datalogging section of the instrument is always
powered and a battery backup circuit protects it from loss
of data for up to 40 minutes during battery changes.
7.1.2 PERIOD
The logging time that begins when the instrument is
turned on and initiates normal operation and lasts until the
instrument is turned off.
NOTE: The instrument must be stored on a battery
charger when not in use to prevent loss of data
due to battery discharge.
7.1.3 LOGGING SESSION
One or more periods of normal instrument operation
between hygiene function resets.
7.3 RESETTING THE HYGIENE FUNCTIONS
RT06:45
LT00:00
7.1.4 REAL TIME CLOCK
The internal clock that maintains the current time.
NOTE: If you are using the datalogging feature, be sure
the correct date and time are programmed by
checking/setting the Real Time Clock and
Calendar using the optional ATX
7.1.5 LOG TIME CLOCK
The running clock that monitors the length of time logged
during a session.
Hygiene/Datalogging Software.
RTOR:OR
LT00:00
• Press MODE repeatedly to step to the HYGIENE screen.
• Press (E) to reset the hygiene function and begin a new
datalogging session.
7.1.6 CALENDAR
A part of the real time clock that maintains the
current date.
The instrument display will return to the LOG TIME
mode and the display will indicate that the log time (LT)
will be reset to 00:00. The TWA and STEL values for all
toxic sensors will also be reset to zero.
RTOR:OR
LT0R:0R
7.1.7 TWA (TIME-WEIGHTED AVERAGE)
The accumulated gas exposure averaged over a
predetermined time, typically eight hours.
If there is insufficient memory to log approximately 12
hours of data when the hygiene function is reset, the real
time clock value will be displayed as RTOR:OR.
7.1.8 STEL (SHORT TERM EXPOSURE LIMIT)
The accumulated gas exposure value averaged for the
proceeding fifteen minutes.
When the memory is full, both the real time and log time
will be displayed as OR:OR. At this time, the data may be
cleared by performing a hygiene reset as described above.
All currently stored data will be overwritten. The stored
data may be down-loaded using the ATX
7.2 PRINCIPLES OF OPERATION
hygiene/datalogging software.
If the ATX612 is equipped with the hygiene/datalogging
option, all sensor readings are sent to the hygiene module.
Once every minute the readings are averaged, saved to the
memory and the TWA and STEL values are calculated for
the toxic sensors. The TWA and STEL values are then
tested for possible alarm conditions.
7.4 DOWNLOADING THE ATX612
To connect the ATX612 for downloading data to the PC:
• Start the datalog software on the PC.
The default time base for calculating TWA values is eight
hours. However, the time base may be changed to any
value in the range from one to 40 hours using the
optional ATX Hygiene/Datalogging Software and a
personal computer.
• Connect the interface cable to the infrared data port on
the bottom of the ATX612.
• Select CONNECT from the menu on the datalog
software.
The instrument memory provides storage capacity for
approximately 110 hours of logged data in an instrument
with four sensors installed.
• Turn on the instrument when prompted.
• The ATX612 will show CONNECT and the instrument
will begin communicating with the PC.
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• Remove the battery pack from the instrument as
described in Section 8.2.
MAINTENANCE
8.
• Remove the two screws which hold the battery module
in place as shown in Figure 4.
8.1 CLEANING
• Lift the Nicad battery module from the battery pack.
• Place the new Nicad module in the battery pack.
Wipe the outside of the instrument with a soft, clean cloth.
Never use solvents or cleaning solutions of any type.
• Replace the two screws which hold the Nicad module
in place.
8.2 CHANGING THE BATTERY PACK
To change the ATX612 battery pack:
8.2.2 REPLACING ALKALINE BATTERY CELLS
The alkaline battery pack holds 6 C-cell batteries. To
replace the alkaline battery cells:
• Hold the instrument with battery pack facing up.
• Using the maintenance tool provided with the
instrument, turn counter-clockwise and loosen the two
hex screws in the battery pack.
• Remove the battery pack from the instrument as
described in Section 8.2.
• Remove the battery pack. (See Section 8.2.1 for
instructions of replacing the Nicad battery module)
• Remove the alkaline cells from the battery pack.
• Insert the new cells making sure to observe proper
polarity.
• Place the battery pack on the instrument.
• Turn the hex screws clockwise until the screws are tight
and reach the stops. DO NOT OVER TIGHTEN.
NOTE: Proper polarity of the alkaline battery cells is
identified by the molded “+” and “-” symbols in
the bottom of the battery pack. In addition the
positive (+) battery contact is identified by the red
polarizing tab.
8.2.1 REPLACING THE NICAD BATTERY MODULE
The Nicad cells within the battery pack may be replaced
when necessary by installing a new Nicad battery module.
To replace the Nicad battery module:
Battery Pack
Hex Screws
8.3 OPENING THE INSTRUMENT FOR SERVICE
To open the instrument for service:
Nicad Battery
Module
• Remove the battery pack as described in Section 8.2.
• Remove the four screws from the bottom of the
instrument chassis.
• Gently lift the case top from the chassis.
Battery Pack
8.4 INSTALLING OR CHANGING SENSORS
To change sensors in the ATX612:
Figure 4
• Open the instrument as described in Section 8.3.
• Remove the three screws which hold the sensor manifold
in place.
• Gently lift the sensor manifold away from the chassis as
shown in Figure 5.
NOTE: It is not necessary to disconnect the sample tubing
from the manifold to replace the sensors.
Figure 5
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WARNING: When removing a sensor from
service, the appropriate sensor plug
must be installed to ensure proper
instrument operation. Toxic/O2
Sensor Plug P/N 1704-6947
Combustible Sensor Plug
!
REPLACEMENT PARTS
The following items numbers refer to the exploded view
drawing on pages 24 and 25.
9.
Shorting Wire
P/N 1706-2647
ITEM PART NUMBER DESCRIPTION (QTY)
8.4.1 TOXIC/OXYGEN SENSOR REMOVAL/
REPLACEMENT
• To remove a toxic or oxygen sensor, grasp the sensor
and lift it straight up. Use care to avoid bending the
sensor pins.
1
2
3
4
5
6
or
7
8
9
10
11
12
13
14
15
16
17
18
19
1705-8868
1705-6755
1705-9247
1705-9031
1706-3447
1705-9494
1705-9312
1706-0716
1706-2498
1705-8157
1705-7118
1705-8660
1705-8140
1706-0674
1702-8374
1705-0295
1706-1284
1705-8306
1706-0500
1705-8652
Main PC Board (1)
Display PC Board (1)
Interface PC Board (1)
Chassis (1)
Pump Assembly (1)
Nicad Battery Pack
Alkaline Battery Pack
Case Gasket (1)
Filter Housing (1)
Dust Filter/Water Stop (1.2 Micron) (1)
Speaker (1)
Speaker Gasket (1)
Speaker Water Barrier (1)
Sensor Manifold (1)
External Alarm Jack (1)
RFI Screen (1)
WARNING: When removing a toxic sensor for
storage, connect a shorting wire to
the two pins as shown.
!
• New toxic sensors are shipped with a shorting wire
attached. Remove the shorting wire from the new
sensor.
• Immediately install the sensor in the instrument. Never
apply pressure to the area inside of the black O-Ring seal
at the top of the sensor.
8.4.2 COMBUSTIBLE SENSOR REMOVAL/
REPLACEMENT
• To remove the combustible sensor, grasp the sensor and
lift it straight up.
Case Top (1)
Key Pad (1)
Alarm Lens (1)
Alarm Lens Gasket (1)
• Press the new sensor firmly into the sockets on the
PC board.
8.5 CHANGING THE INTERNAL FILTER
If the internal dust filter/water stop becomes blocked, a
PUMP FAULT alarm will result. The filter must be
replaced immediately before continuing operation. To
remove and replace the internal dust filter/water stop from
the instrument:
• Unscrew and remove the knurled sample inlet fitting from
the instrument as shown in Figure 6.
• Grasp the dust filter/water stop from the instrument and
pull straight out to remove.
• Replace the dust filter/water stop making sure that the
larger diameter opening of the filter is facing inward.
• Replace the knurled sample inlet fitting.
NOTE: The ATX612 will remain in a PUMP FAULT
condition if operation is attempted with the dust
filter/water stop removed.
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Figure 6
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SPECIFICATIONS
10.
DEFAULT ALARM SETTINGS
11.
LEL
CH4
CO
H2S
SO2
NO2
Cl2
CASE:
Type 304 Stainless Steel
GAS
LOW ALARM
HIGH ALARM
O2
19.5%
23.5%
DIMENSIONS:
8.2”L x 3.7”W x 3.2”H
(208 X 94 X 81 mm)
10%
20%
1.0%
1.5%
WEIGHT:
SENSORS:
3.4 lbs (1.5 kg)
35 PPM
10 PPM
2.0 PM
3.0 PPM
0.5 PPM
0.3 PPM
70 PPM
20 PPM
4.0 PPM
6.0 PPM
1.0 PPM
1.0 PPM
Combustible Gases and Methane-
Catalytic
Oxygen and Toxic Gases-
Electrochemical
ClO2
MEASURING RANGE:
LEL (Combustible Gases)
0 to 100% LEL in 1% increments
NOTE: Factory alarm settings may not coincide with
local regulations. Consult all appropriate local
regulations for appropriate alarm settings in
your region.
CH4 (Methane)
0 to 5% of volume in 0.1% increments
O2 (Oxygen)
0 to 30% of volume in 0.1% increments
ATX612 OPTIONS & ORDERING INFORMATION
12.
CO (Carbon Monoxide)
0 to 999 PPM (parts per million) in 1 PPM increments
PART NUMBER
DESCRIPTION (QTY)
1705-0788-PPM
1705-0129
1704-1898
1704-1880
1704-1914
1704-4204
1704-1922
1704-1906
1810-1386
1810-1428
1705-9494
1705-9312
1810-3259
1810-0628
1810-2921
1810-1154
1810-2146
1810-2187
1810-1576
1810-2165
1810-1584
1810-2222
1810-1758
1810-2219
1810-2509
Combustible Sensor
Oxygen Sensor
Hydrogen Sulfide Sensor
Carbon Monoxide Sensor
Chlorine sensor
CLO2 sensor
Nitrogen Dioxide Sensor
Sulfur Dioxide Sensor
Stainless Steel Extendible Probe - 6ft.
Polycarbonate Probe
Rechargeable Nicad Battery Pack
Replaceable Alkaline Battery Pack (6 C-cell)
Leather Carrying Case for ATX612
Shoulder Strap
Carrying Handle for ATX612
External Audible/Visual Alarm
External Vibrating Alarm
Cylinder Cal. Gas, H2S, CO, Pentane and Oxygen
Cylinder, Cal. Gas, Carbon Monoxide, Pentane and Oxygen
Cylinder, Cal. Gas, Carbon Monoxide, Methane and Oxygen
Cylinder, Cal. Gas, Zero Air
H2S (Hydrogen Sulfide)
0 to 999 PPM (parts per million) in 1 PPM increments
SO2 (Sulfur Dioxide)
0 to 99.9 PPM (parts per million) in 0.1 PPM increments
NO2 (Nitrogen Dioxide)
0 to 99.9 PPM (parts per million) in 0.1 PPM increments
C12 (Chlorine)
0 to 99.9 PPM (parts per million) in 0.1 PPM increments
C1O2 (Chlorine Dioxide)
0 to 99.9 PPM (parts per million) in 0.1 PPM increments
POWER SOURCE: Rechargeable, replaceable nickel-cadmium battery
pack, or replaceable cell alkaline battery pack
BATTERY LIFE: With Nicad Battery Pack - 16 hours typical
With Alkaline Battery Pack - 20 hours typical
READOUT:
Alpha-Numeric Liquid Crystal Display
Cylinder, Cal. Gas, 5 PPM Sulfur Dioxide
Cylinder, Cal. Gas, 10 PPM Chlorine
Cylinder, Cal. Gas, 5 PPM Nitrogen Dioxide
Demand Flow Regulator with Pressure Gauge
TEMPERATURE RANGE:
With H2S Sensor
-
20ºC to 50ºC (-4ºF to 122ºF
)
-40ºC to 50ºC (-40 F to 122 F)
º
º
HUMIDITY RANGE:
0% to 99% RH (Non-condensing)
STORAGE TEMPERATURE: 0ºC to 20ºC (32ºF to 68ºF)
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13.
WARRANTY
It shall be an express condition to Industrial Scientific’s
warranty that all products be carefully inspected for
damage by Buyer upon receipt, be properly calibrated for
Buyer’s particular use, and be used, repaired, and
maintained in strict accordance with the instructions set
forth in Industrial Scientific’s product literature. Repair or
maintenance by non-qualified personnel will invalidate the
warranty, as will the use of non-approved consumables or
spare parts. As with any other sophisticated product, it is
essential and a condition of Industrial Scientific’s warranty
that all personnel using the products be fully acquainted
with their use, capabilities and limitations as set forth in
the applicable product literature.
Industrial Scientific portable gas monitoring instruments
are warranted to be free from defects in material and
workmanship for as long as the instrument is in service.
The above warranty does not include sensors, battery
packs, internal pumps or filters, all of which are warranted
to be free from defects in material and workmanship for
eighteen months from the date of shipment, or one year
from the date of first use, whichever occurs first, except
where otherwise stated in writing in Industrial Scientific
literature accompanying the product.
All other Industrial Scientific products are warranted to be
free from defects in material and workmanship for a
period of eighteen (18) months from the date of shipment,
or one (1) year from the date of first use, whichever
occurs first, except where otherwise stated in writing in
Industrial Scientific literature accompanying the product.
Buyer acknowledges that it alone has determined the
intended purpose and suitability of the goods purchased. It
is expressly agreed by the parties that any technical or
other advice given by Industrial Scientific with respect to
the use of the goods or services is given without charge
and at Buyer’s risk; therefore, Industrial Scientific
assumes no obligations or liability for the advice given or
results obtained.
LIMITATION OF LIABILITY
INDUSTRIAL SCIENTIFIC MAKES NO OTHER
WARRANTIES, EITHER EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR PARTICULAR PURPOSE.
SHOULD THE PRODUCT FAIL TO CONFORM TO
THE ABOVE WARRANTY, BUYER’S ONLY REMEDY
AND INDUSTRIAL SCIENTIFIC’S ONLY
OBLIGATION SHALL BE, AT INDUSTRIAL
SCIENTIFIC’S SOLE OPTION, REPLACEMENT OR
REPAIR OF SUCH NON-CONFORMING GOODS OR
REFUND OF THE ORIGINAL PURCHASE PRICE OF
THE NON-CONFORMING GOODS. IN NO EVENT
WILL INDUSTRIAL SCIENTIFIC BE LIABLE FOR
ANY OTHER SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES, INCLUDING LOSS
OF PROFIT OR LOSS OF USE, ARISING OUT OF THE
SALE, MANUFACTURE OR USE OF ANY PRODUCTS
SOLD HEREUNDER WHETHER SUCH CLAIM IS
PLEADED IN CONTRACT OR IN TORT, INCLUDING
STRICT LIABILITY IN TORT.
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