MVR-300™ Refrigerant Gas Detector
24
P/N: 6203-9000 Version 1
5.2.2
General Procedure
Step
Description
1.
Verify that the detector is NOT in alarm and does not have a fault condition (i.e., it must
not
have a continuous orange LED).
2.
Verify that the calibration gas is in a balance of air, not Nitrogen (N
2
).
3.
Attach the pressure regulator to the calibration gas cylinder.
4.
Fit calibration adapter to the cover plate or base plate (see below).
5.
Connect the tubing to the barbed fittings of the pressure regulator and calibration adapter.
6.
Verify that gas flow is approximately 0.3 to 1.0 L/min.
7.
If operation is intended to be at higher altitudes, the factory calibration will result in a reading
lower than the reading at sea level (reduced partial pressure). A new span adjustment is
recommended if the altitude or the ambient pressure is changed. The factory calibration is set
to sea level.
8.
Always perform a zero adjustment
before
a span adjustment.
Item
Description of Calibration Components
1
Calibration adapter
2
Flow meter
3
Pressure regulator
4
Calibration gas
5
Tubing
6
Calibration from base plate (with test point access)
7
Calibration from cover plate
Figure 21. Calibration Assembly
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