Specifications

Instruction 3015-4148 59
Programming New Gasses
As new refrigerants come into use the HGM300 allows the addition of these new gases to its on-board
refrigerant gas library. At the end of the gas library list are five place-holders for adding new gases. They are
labeled “NEW GAS1 – NEW GAS5.” From the Calibration Screen a place-holder for the new gas is selected
and renamed to the desired refrigerant type. Next a “matching” refrigerant from the standard library is
selected and a CAL factor is entered. The selection of the matching gas and CAL factor is performed by
Bacharach 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 setup the
appropriate zone for NEW GASX where X is the number of the place-holder you used.
Program the instrument for a new gas as follows:
1. From the Calibration Screen, use the PREV GAS or NEXT GAS keys to scroll through the list of
available choices until a NEW GAS box is displayed.
New Gas Screen
2. Press the NEW GAS NAME key to assign a name to the refrigerant.
a. Use the LEFT/RIGHT cursor keys to move across the entry field and the UP/DOWN cursor
keys to modify the individual characters.
b. Press ENTER to accept the new entry or QUIT to revert to the previous setting.
3. Press the NEWGAS CURVE key to select a refrigerant with a similar calibration curve as received
from Bacharach.
4. Use the UP/DOWN cursor keys to scroll through the available refrigerants.
5. Press ENTER to accept the new entry or QUIT to revert to the previous setting.
6. You may then adjust the calibration factor for the new gas if desired as described under the heading
Calibration Procedure on Page
58.