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

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.
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• 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
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