A-4 | Model 241CE II Hydrocarbon Dewpoint Analyzer
2. Perform the Zero (I1Z) and Span (I1S) calibrations for the external
water dewpoint V/I. See “Current Output Zero/Span Calibration” in
Chapter 4 for more information about calibrating these output ranges.
3. Change the analyzer’s Low V/I WDP range (I1L) or WCT (I3L) to
match the value entered for the ExLo value.
Change the analyzer’s High V/I WDP range (I1H) or WCT (I3H) to
match the value entered for the ExHi value.
4. After all of the parameters have been programmed, begin calibrating
the analyzer. To do this:
a. Connect a 4–20 mA power source, or the external water signal, to
the spare analog input Terminals 12+ and 13- on connector J101
on the Termination board in the Electronics Enclosure.
Before you can view the WDP or WCT readings discussed in Steps
4 -b and 4-c, you must select the appropriate option (either H2O DP:
EXT or H2O CT:EXT) from the Water Measurement Option sub-
menu of the MonitorCFG menu.
b. Simulate the low range with a 4 mA signal (or the external water
signal) to the analyzer.
From the RUN menu, view the external water dewpoint (WDP)
or external water content (WCT) reading. Press to refresh the
reading by scrolling through the readings until the WDP or WCT
reading is displayed again. Record this value for future reference.
c. Simulate the high range with a 20 mA signal (or the external water
signal) to the analyzer.
From the RUN menu, view the external water dewpoint (WDP)
or external water content (WCT) reading. Press to refresh the
reading by scrolling through the readings until the WDP or WCT
reading is displayed again. Record this value for future reference.
NOTE
RUN Mode
MonitorCFGI1S (I1S)
RUN Mode
ApplicCFGI1L (I3LI1H,I3H)
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