2 • MRLDS-250 Gas Detector Manual 026-1315 Rev 2 11-APR-2017
Figure 1-2 Broadband Gas Groups 1-3
1.2.3. Detecting Specific Gases
Each gas-specific gas detector is shipped factory
calibrated to its specific target refrigerant. Refer to
Figure 1-3 and Table 1-2.
Figure 1-3 Gas-Specific MRLDS-250 Gas Detectors
1
See Section 5, Configure the Gas Detector for Information on
Parameter 11 and other configuration instructions.
Part Number
Refrigerant
1
Accuracy
809-0031 R22 ±3%
809-0034 R404a ±3%
809-0035 R407a ±3%
809-0040 R422d ±3%
Table 1-2 Gas-specific Detector Measurement Performance
NOTE: Gas-specific detectors can be re-
calibrated in the field to new target gases. Use
optional calibration instructions in Section 6,
Functional Tests and Adjustments for
increased accuracy when detecting new target gas that
is different from the “as shipped” target gas. Refer to
the example in Table 1-3.
As Shipped
Part number 809-0031 (R22) is factory
calibrated to R22.
Changed
Gas Type
(Reduced
Accuracy)
The gas detector may be changed to respond to
any of the other listed refrigerants (see
parameter P.-11, in Section 5.2., Setting
Parameters). If changed, the gas detector will
have a lower accuracy for the target refrigerant
(without calibration).
Table 1-3 Changing Gas Types and Accuracy
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