Calibration - Prosense Safevader Series User Manual

Calibration

It is recommended to periodically carry out calibration to ensure correct operation. Prosense
SAFEVADER series detector calibration includes two steps as zero and span calibration. It is
possible to perform each step independently. Prosense recommends to perform both
calibration steps to have correct calibration. Detector should be powered and stabilized for at
least 4 hours before calibration. During the calibration phases the detector output is inhibited
(default 3mA) to avoid false alarms. Zero calibration of infrared sensors should be done with N2
and zero calibration of other sensors should be done with zero air (O2 and N2 gas mixtures). It
is possible to use calibration gas from 25%LEL to 75%LEL gas concentrations via adjusting
reference gas details on detector menu for calibrating flammable gas detectors It is necessary
to use international tracable gases.
To calibrate the detector, use an appropriate span gas cylinder, constant flow regulator and
Prosense Gas Cap. The gas flow rate must be 0,5lt/min for correct calibration.
It is recommended to use a compressed air cylinder (20.9%Vol oxygen) to perform the zero
calibration if the area where the detector is located contains any residual amount of the target
gas. If no residual gas is present then the background air can be used to perform the zero
calibration.
To perform calibration procedure a hand terminal or screen is necessary. Attach hand terminal
to detector and press Enter to reach menu. The screen will request password information:
The default password is 1234. If user changed the default password use updated password. You
need to set values via using up and down keys. Once the value is set press Enter again to confirm
and move to the next digit. The digit confirmed will made invisible by detector program:
PRS-UM-SV-EN-Rev1.0-16.12.2022
PASSWORD
0
PASSWORD
****
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