BW Technologies GasAlertMicro 1, Руководство пользователя

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GasAlertMicro
Calibration and Setting Alarm Setpoints
Calibration and Setting Alarm Setpoints
Guidelines
When calibrating the detector, adhere to the following
guidelines:
•
Recommended gas mixture:
CO: 10 to 500 ppm balance N
2
H
2
S: 10 to 100 ppm balance N
2
SO
2
: 10 to 100 ppm balance N
2
LEL: 10 to 100% LEL or .5 to 5% by vol. Methane
balance air
O
2
: Clean Air, 20.9 %
•
CG-Q58-4 and CG-Q34-4 Calibration Gas (4-gas mix)
are available from BW Technologies. See the section
“
Replacement Parts and Accessories .”
• Calibration accuracy is never better than the calibration
gas accuracy. BW Technologies recommends a
premium-grade calibration gas. Gases with NIST
(National Institute of Standards and Technology)
traceable accuracy will improve the validity of the
calibration. Do not use a gas cylinder beyond its
expiration date.
•
Calibrate a new sensor before use. Install the sensor,
activate the detector, and allow the sensor to stabilize
before starting calibration (used: 60 seconds; new: 5
minutes).
•
Calibrate the detector on a regular basis, depending on
use and sensor exposure to poisons and contaminants.
BW recommends at least once every 180 days.
• Calibrate the detector if the ambient gas display varies at
startup.
• It is best to calibrate the sensor before changing alarm
setpoints.
• Calibrate only in a clean atmosphere that is free of
background gas.
• To disable an alarm, set its alarm setpoint to 0.
•
The combustible sensor is factory calibrated to 0 to 100%
LEL using methane. If monitoring a different combustible
gas in the 0-100% LEL range, calibrate the sensor using
the appropriate gas.
•
The Oxygen sensor can be automatically calibrated each
time on activation, if this feature is enabled. Activate the
detector in a normal (20.9% Oxygen) atmosphere.
• If you require a certified calibration, contact
BW Technologies. See “ P.2 ”
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