40 • RLDS I&O Manual 026-1309 Rev 8
PPM by placing the cursor on the spikes cause by the
sample. If the bag was large enough for multiple
samples, average the most stable ones.
The new CAL factor is computed by dividing the
known gas value by the measured value. Typically
this value will be between 0.95 and 1.05. This value is
stored in non-volatile memory.
8.9.6. Programming New Gases
As new refrigerants come into use, the RLDS
allows the addition of these new gases to its on-board
refrigerant gas library. At the end of the gas library list
is an option labeled CUSTOM for adding new gases.
From the Calibration screen use the left/right arrows
to select CUSTOM from the list of refrigerants. Next,
press ENTER, and use the up/down arrow keys to
enter the calibration factor.
The selection of the matching gas and CAL factor is
performed by analyzing the new refrigerant. Once the
matching gas is determined, field calibration is
possible by using the same procedure as for other
refrigerants. When the new gas entry is complete,
simply set up the appropriate zone for CUSTOM.
Program the instrument for a new gas as follows:
1. From the Calibration screen, use the PREV
GAS or NEXT GAS options to scroll through
the list of available choices until the CUSTOM
option is displayed.
2. Select the CUSTOM option. Press ENTER to
accept the new entry or ESC to revert to the
previous setting.
3. Enter the new CAL Factor as received from
Emerson Electronics and Solutions.
Figure 8-11 - Custom Gas Screen
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