Calibration; Guidelines - Honeywell GasAlert Max XT II User Manual

Calibration

Guidelines

Recommended gas mixture:
CO: 100 ppm balance N
2
H S: 25 ppm balance N
2 2
LEL: 50% LEL or 2.5% by vol. methane balance air
O : clean air, 18%
2
• To ensure accurate calibration, use a premium-grade calibration
gas. Gases approved by the National Institute of Standards and
Technology (NIST) improve the validity of the calibration.
• Do not use a gas cylinder past its expiration date.
• Calibrate a new sensor before use. Install the sensor, activate the
detector, and allow the sensor to stabilize before starting calibra-
tion or a bump test.
Used sensor: 60 seconds / new sensor: 5 minutes.
• Calibrate the detector at least once every 180 days, depending
upon use and sensor exposure to poisons and contaminants.
• Calibrate the detector if the ambient gas varies during startup.
• Calibrate only in a safe area that is free of hazardous gas.
• Do not calibrate the detector during or immediately after charging
is complete.
• The H S, CO, LEL and O
2
each time the detector is activated if the Auto-Zero on Startup
option is enabled. Activate the detector in a normal (20.9%/20.8%
O ) atmosphere.
2
sensors can be automatically zeroed
2
• If a certified calibration is required, contact
Honeywell.
• Calibration can be performed using either a 0.5 l/min regulator or a
demand flow regulator.
• The maximum hose length for calibration is 3 ft (0.9 m).
a Warning
Calibration cylinders that are used with a demand flow
regulator must meet the following maximum inlet
pressure specifications:
• Disposable cylinders 0-1000 psig/70 bar
• Refillable cylinders 0-3000 psig/70 bar
BW recommends using premium grade calibration gases
and cylinders that are certified to National Standards.
The calibration gases must meet the accuracy of the
detector.
GasAlertMaxXT II
Calibration
BW Technologies by
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