BW Technologies MicroClip XT Especificaciones descargar pdf (Pagina 49)

GasAlertMicroClip XT

Technical Reference Guide

Calibration

Guidelines

When calibrating the detector, adhere to the following guidelines:

• Recommended gas mixture:

CO: 100 ppm balance N

S: 25 ppm balance N

LEL: 50% LEL or 2.5% by vol. methane balance air

: clean air, 18%

• To ensure accurate calibration, use a premium-grade calibration

gas. Gases approved by the National Institute of Standards and

Technology (NIST) improve the accuracy 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 (used sensor: 60 seconds / new sensor: 5 minutes).

• Calibrate the sensors at least once every 180 days, depending on

use and sensor exposure to poisons and contaminants.

• Calibrate the detector if the gas readings varies during startup.

• Calibrate the sensor before defining the alarm setpoints.

• Calibrate only in a safe area that is free of hazardous gas in an

atmosphere of 20.9% oxygen.

• Do not calibrate the detector during or immediately after charging

is complete.

• The oxygen sensor can be automatically calibrated each time upon

activation (if this feature is enabled). Activate the detector in a nor-

mal (20.9%/20.8% oxygen) atmosphere.

• Allow the detector to stabilize for 1 minute after activation before

performing a calibration or bump test.

• If a certified calibration is required, contact BW Technologies by

Honeywell.

Diagnostics Test

The detector tests the \air (auto zero) and the span gas that is applied

(auto span) to ensure it meets expected values. Auto zero sets the zero-

gas level of the sensor.

Auto Zero: If target gas is present, the zero level will be incorrect and

the sensor will fail. If a sensor fails, an error message displays.

Auto Span: If the target gas does not meet expected values, an error

message displays.

A sensors that fails to span retains the previous span value, and does

not continue with the calibration process.

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BW Technologies MicroClip XT Especificaciones Pagina 49