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Calibration
Guidelines
a Caution
If adjustments are made to the real-time clock, the
calibration due date will be invalid for the
- GasAlert Extreme,
- GasAlertMicro,
- GasAlertMicro 5,
- GasAlertMicro 5 PID, and
- GasAlertMicroClip detectors.
Recalibrate the detector immediately.
When calibrating the detector, adhere to the following
guidelines:
•
Recommended gas mixture:
O
: clean air, 20.9% vol.
2
CO: (low H2 sensitivity): 50 to 500 ppm balance N
CO: 50 to 500 ppm balance N
H
S (high range): 10 to 100 ppm balance N
2
H
S (low methanol): 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
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
2
2
2
2
2
2
2
2
2
2
HCN: 5 to 20 ppm balance N
ETO: 5 to 50 ppm balance N
NO: 10 to 250 ppm balance N
Cl
: 3 to 25 ppm (for bump checks only)
2
VOC: 100 ppm isobutylene
LEL:10 to 100% LEL or 0.5 to 5% by vol. methane
balance air
•
Calibrate only in a clean atmosphere that is free of
background gas. Do not operate the station in a
hazardous area. Failure to adhere to this guideline can
result in possible personal injury and/or property
damage.
•
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.
•
Do not use a gas cylinder beyond its expiration date.
•
All calibration cylinders must be used with a demand
flow regulator and must meet the following maximum
inlet pressure specifications:
i.
Disposable cylinders 0-1000 psig/70 bar
ii. Refillable cylinders 0-3000 psig/207 bar
•
Refer to the detector manual for recommended
calibration frequencies.
MicroDock II
Calibration
2
2
2
59
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