Robinair 16910 ID Plus Refrigerant Identifier - Manual (Page 16)

14
Operating Procedures
9. You may now print the results of the analysis. Connect a user-supplied cable and
parallel printer to the printer port of the instrument. Turn on the printer, and press the
“A” button of the instrument. The results of the last analysis are downloaded to the
printer. Note: Should a printer not be readily available, the instrument stores the LAST
result only for printout during the next warm-up period, as described in Step 3.
If no printout is desired, press the “B” button. In the case of pure refrigerant, the
instrument reverts to the purge procedure should there be greater than 2% by weight
air concentrations. The instrument prompts you if an air purge is desired as described
in the Air Purge Operation Procedure. The instrument returns to a calibration mode
when the “B” button is pressed for refrigerants detected to be pure and have 2% or less
air contamination, or refrigerants detected to be contaminated.
Air Purging Operation Procedure
WARNING
Because leaks can develop in the sample hose connections or the
refrigerant source, causing a health hazard, do NOT allow the purging
feature to operate for extended periods, such as overnight, without
periodic inspection of the sample hose connections for leaks.
1. Whenever the instrument has determined that a refrigerant source is pure (98% by
weight or greater R-12 or R-134a), and the air concentration levels exceed 2%, you are
prompted if an air purge is desired. Press the “A” button to initiate the purge procedure,
or press the “B” button to cancel the purge procedure.
2. After the instrument is instructed to purge, the user has the option to adjust the purge
limit setting by pressing the “B” button. The purge limit setting is the level to which
the air is reduced by the instrument. The limit is adjustable by 0.1% increments from
2%–9%. To set the limit, press the “A” button to raise the limit or the “B” button
to lower the limit. When the desired setting is reached and is displayed, allow the
instrument to sit for 15 seconds without pressing any of the buttons. The instrument
automatically stores the setting and continues with the procedure.