Table 7-2. Instrument Specifications
TEMPERATURE
RANGE
Normal
0 to 40
o
C
Extended**
-20 to 50
o
C
WARM-UP TIME
20 seconds; 25 seconds with pump
*NOTE 1:
Response times reported for diffusion usage:
When using a pump module and sample line, add time for the gas sample to be
drawn through the sample line. Typical transport times are:
5 feet 3 seconds
10 feet 7 seconds
50 feet 15 seconds
These should be added to the sensor response times reported in this chapter.
**NOTE 2:
Extended temperature range indicates that gas readings may vary
slightly if calibrated at room temperature. For optimal performance, it is
recommended that the instrument be calibrated at temperature of use.
Measurement Methods
COMBUSTIBLE
GAS
Catalytic Sensor
OXYGEN
Electrochemical Sensor
TOXIC GASES
Electrochemical Sensors
Factory-Set Alarm Setpoints
HIGH ALARM LOW ALARM STEL TWA
CO
35 PPM -- 400 35
H
2
S
10 PPM -- 15 10
LEL
10% LEL -- -- --
O
2
22.0% 19.5% -- --
Chapter 7, Performance Specifications Operating Manual
7-2
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