CALIBRATION
MSA
12
Chillgard
M-100
GB
3.3. Calibration Procedure
CAUTION!
If any control instruments connected sensor are wired to external devices (e.g., horns, exhaust fans, and
fire suppression systems), these devices may activate during the following procedures. To prevent
activating these devices while adjusting the sensor, disconnect the wiring to the control device. Return all
wiring to the control device when the calibration procedure is completed.
To verify that the sensor is operating properly:
(1) Deactivate any equipment connected to the outputs, or
disconnect the wiring of the outputs.
(2) With the tubing connected to the regulator and cylinder,
place tubing in the opening at the bottom of the sensor
(
Fig. 6).
(3) Open the regulator and apply gas for a minimum of five
minutes.
(4) If the unit is operating properly, the red LED:
illuminates when concentration level is > 50 ppm
is visible through the calibration check opening.
(5) Turn OFF regulator and remove tubing from opening.
(6) Allow gas level to return to normal.
(7) Reactivate any equipment connected to the outputs or
reconnect the wiring to the outputs.
Fig. 6 Applying Calibration Gas
1 Regulator 1.5 LPM (P/N 467896)
2 Span Or Zero Gas Cylinder
1
2
