4-22 | Model 241CE II Hydrocarbon Dewpoint Analyzer
Current Output Zero/Span Calibration
The entries for Zero or Span calibration of the V/I outputs are used to
determine the output offset of a given V/I module.
To calibrate the Zero or Span V/I outputs:
1. Press to select the desired V/I module – Zero (Z) or Span (S) – and
then press ‘+’ or ‘–’ to activate the corresponding calibration function.
2. Using an inline 249 ohm resistor, connect a multimeter to the termi-
nals of the V/I you wish to measure. Check the mA output on the User
Interface. If the value on the User Interface does not match the multi-
meter reading, use the ‘+’ or ‘–’ button to change the displayed value
to match the multimeter reading.
Example, if the reading on the multimeter is 3.94 mA and the reading
on the User Interface is 4.00, use the ‘–’ button to decrease the value to
3.94.
3. Repeat Steps 1 and 2 for the other V/I modules.
Operating in Standby Mode
If LED 2 on the User Interface is On, this indicates that the built-in diag-
nostic system has activated and latched the Fault Alarm relay. During this
condition, the diagnostics function places the analyzer in Standby Mode;
the analyzer requires immediate service. For more information about this
condition, refer to Chapter 6.
RUN Mode
MonitorCFG
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