Calibration Instruction
1 Calibration Instruction for Salwico GD True IR
5103024_Salwico GD True IR_Calibration Instruction_I0_EN_2014_C
1
1 Calibration Instruction for Salwico GD
True IR
1.1 Preliminaries
This instructions applies to the following products: 5200138-00A, 5200138-01A,
5200204-00A, 5200204-01A and 5200204-02A.
Figure 1. Salwico GD FH TRUE IR
It is recommended to carry out a gas response check each 6 moths on the gas
detector to ensure the correct operation. If the gas reading has drifted outside the
specified range a calibration of the instrument is necessary.
CAUTION!
Before initial calibration allow the detector to stabilize for 30 minutes after
applying power. When in
zero
and
span
calibration mode the current output from
the detector is inhibited (default 2mA) to avoid false alarms. For Flammable gas
calibration use a calibration gas concentration of between 25%LEL and 75%LEL
to ensure that the required accuracy can be attained.
Considerations:
•
To calibrate the detector, use an appropriate span gas cylinder, constant flow
regulator.
•
A compressed air cylinder (20.9%Vol oxygen) should be used 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 calibrate the detector follow the procedures below.
