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Multi-Gas
Monitor
ATX 612
1. W
ARNINGS AND
C
AUTIONARY
S
TATEMENTS
3
2. U
NPACKING
T
HE
I
NSTRUMENT
4
3. ATX612 F
EATURES
4
4. I
NSTRUMENT
O
PERATION
5
4
.1 Charging the Battery
5
4.1.1 Alkaline Battery Option 8
4
.2
Turning the ATX612 On and Off 8
4.3 Display Backlight 8
4.4 Internal Sampling Pump 8
4.5 Operating Modes 9
4.5.1 Reading 9
4.5.2 Sensor Configuration 9
4.5.3 PPM Hydrocarbon 9
4.5.4 Zero 9
4.5.5 Peak 9
4.5.6 Peak Clear 10
4.5.7 Date 10
4.5.8 Cal Date 10
4.5.9 Log Time 10
4.5.10 TWA 10
4.5.11 STEL 10
4.5.12 Hygiene Reset 10
4.6 Alarm Indicators 10
4.6.1 Low Alarm 10
4.6.2 High Alarm 11
4.6.3 Over-Range Indication 11
4.6.4 Combustible Gas Over-Range 11
4.6.5 Low Battery Warning 11
4.6.6 Battery Failure 12
4.6.7 Fault Indication 12
5. C
ALIBRATING THE
ATX612 12
6. C
HANGING
I
NSTRUMENT
S
ETTINGS
15
6
.1 Setspan
15
6.2
Alarms
16
6.3 Code 17
7. H
YGIENE
/D
ATALOGGING
F
UNCTIONS
17
7.
1 Definition of Terms 17
7.1.1 Data Log 17
7.1.2 Period 18
7.1.3 Logging Session 18
7.1.4 Real Time Clock 18
7.1.5 Log Time Clock 18
7.1.6 Calendar 18
7.1.7 TWA 18
7.1.8 STEL 18
7.2 Principles of Operation 18
7.3 Resetting the Hygiene Functions 19
7.4 Downloading the ATX612 19
8. MAINTENANCE 20
8.1 Cleaning 20
8.2 Changing the Battery 20
8.2.1 Replacing the Nicad Battery Module 20
8.2.2 Replacing Alkaline Battery Cells 21
8.3 Opening the Instrument for Service 21
8.4 Installing or Changing Sensors 21
8.4.1 Toxic/Oxygen Sensor Removal/Replacement 22
8.4.2 Combustible Sensor Removal/Replacement 22
8.5 Changing the Internal Filter 22
9. R
EPLACEMENT
P
ARTS
23
10. S
PECIFICATIONS
26
11. D
EFAULT
A
LARM
S
ETTINGS
27
12. ATX612 O
PTIONS
& O
RDERING
I
NFORMATION
27
13. W
ARRANTY
28
TABLE OF CONTENTS
2 3
1.
W
ARNINGS AND
C
AUTIONARY
S
TATEMENTS
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.
Oxygen deficient atmospheres may cause combustible
gas readings to be lower than actual concentrations.
Oxygen enriched atmospheres may cause combustible
gas readings to be higher than actual concentrations.
Calibrate the combustible gas sensor after each
incident where the combustible gas content causes the
instrument to latch in the OVER-RANGE alarm condition.
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.
Sensor openings and water barriers must be kept clean.
Obstruction of the sensor openings and/or contamination
of the water barriers may cause readings to be lower than
actual gas concentrations.
Sudden changes in atmospheric pressure may cause
temporary fluctuations in the oxygen reading.
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
gas/air (21% oxygen) mixtures only.
CAUTION: High Over-Range (+OR) combustible
gas readings may indicate an
explosive concentration of
combustible gas.
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