Detecting Specific Gases - Emerson MRLDS-250 Installation And Operation Manual

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
2 • MRLDS-250 Gas Detector Manual
Part Number
Refrigerant
809-0031
809-0034
809-0035
809-0040
Table 1-2 Gas-specific Detector Measurement Performance
1
See Section 5, Configure the Gas Detector for Information on
Parameter 11 and other configuration instructions.
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
1
Accuracy
R22 ±3%
R404a ±3%
R407a ±3%
R422d ±3%
026-1315 Rev 2 11-APR-2017