MSA Chillgard m-100, Operating Manual

Page: 11 / 20

GB
MSA CALIBRATION
Chillgard M-100
11
3. Calibration
3.1. Calibration Check
The sensor is designed to operate for long periods of time with no zero drift. However, the sensor should be
checked periodically to verify that the unit detects refrigerant gas. The calibration check can be done with the use
of the following MSA equipment:
 (P/N 603806) Polyurethane Tubing
 (P/N 467896) 1.5 LPM regulator.
A calibration check of the sensor requires a supply of:
 ZERO GAS (air or nitrogen) - Ambient air may be used if it does not contain refrigerant gas or an interfering
component
 SPAN GAS Cylinder comprised of 100 ppm of the refrigerant gas of interest.
3.2. Calibration Gases
Description Concentration
R-123 in Nitrogen 100 ppm
R-134a in Nitrogen 100 ppm
R-22 in Nitrogen 100 ppm
R-404a in Nitrogen 100 ppm