MSA Chillgard LS - To the Chillgard LS Refrigerant Monitor

2. Using a multimeter to read the 4-20 mA output, use the Calibration
Box to move the zero up or down, until the unit output reads 4 mA
+0.1 mA with the zero gas applied.
3. Close the regulator valve and remove the zero gas cylinder from
the sample tubing.
4. Apply span gas to the unit for a minimum of five minutes.
5. Using a multimeter to read the 4-20 mA output, use the Calibration
Box to move the span up or down, until the unit output reads 5.6
+0.1 mA with the 100 ppm span gas applied.
Figure 4-2.
Applying Calibration Gas
to the Chillgard LS Refrigerant Monitor
4-3