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Calibration And Setting Alarm Setpoints; Guidelines - Honeywell GasAlert Extreme User Manual

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GasAlert Extreme
User Manual

Calibration and Setting Alarm Setpoints

Guidelines

When calibrating the detector, adhere to the following guidelines.
Recommended gas mixture:
O
: clean air, 20.9% vol.
2
CO (low H
sensitivity): 50 to 500 ppm balance N
2
CO: 50 to 500 ppm balance N
H
S (high range): 10 to 100 ppm balance N
2
H
S: 10 to 100 ppm balance N
2
PH
: 1 to 5 ppm balance N
3
SO
: 10 to 50 ppm balance N
2
Cl
: 3 to 25 ppm balance N
2
NH
: 20 to 100 ppm balance N
3
NH
: (high range) 20 to 100 ppm balance N
3
NO
: 5 to 50 ppm balance N
2
HCN: 5 to 20 ppm balance N
ETO: 5 to 50 ppm balance N
ClO
: 0.1 to 1.0 ppm balance N
2
O
: 0.1 to 1.0 ppm balance N
3
NO: 10 to 250 ppm balance N
Before operating an ETO detector, allow the detector to stabilize
at the temperature it will be operating in. After the detector has
stabilized, zero the detector.
It is necessary to periodically re-zero the ETO detector.
To ensure accurate calibration, BW recommends using a pre-
mium-grade calibration gas approved by the National Institute of
Standards and Technology (NIST).
Do not use a gas cylinder beyond its expiration date.
32
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Before calibrating a new NO or ETO sensor, allow the sensor to
stabilize for 2 hours in a safe area that is free of hazardous gas.
Calibrate a new sensor before use. Allow the sensor to stabilize
before starting calibration (used: 60 seconds; new: 5 minutes).
Calibrate the detector at least once every 180 days (for HCN
detectors calibrate at least once every 90 days), depending upon
use and sensor exposure to poisons and contaminants.
Calibrate the detector if the ambient gas display varies at
start-up.
It is best to calibrate the sensor before changing the alarm set-
points.
Calibrate only in a safe area that is free of hazardous gas.
To disable an alarm, set the alarm setpoint to zero.
If a certified calibration is required, contact
BW Technologies by
Honeywell.
A generator must be used to calibrate O
Extreme sensors.
Note
and ClO
GasAlert
3
2

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