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External Water Dewpoint/Content Option
A-2 | Model 241CE II Hydrocarbon Dewpoint Analyzer
An external water signal can be brought in to the analyzer and then dis-
played (output) as water dewpoint temperature or water content on its
User Interface or designated V/I outputs.
To configure the analyzer to accept an external water signal and display
it on its User Interface, additional equipment must be installed on the
Microcontroller and Termination boards. Certain analyzer parameters
must also be calibrated to adjust input ranges.
Equipment Installation
The following equipment must be installed to allow the analyzer to accept
an external water signal.
If the external water signal is configured at the factory, the equipment
listed below will already have been installed before shipping. In this
NOTE
case, only the electrical connections and calibration (voltage input)
will be required in the field, as described in this section.
Equipment required to allow the analyzer to accept an external water
signal includes:
• An isolation module (AD202KN) must be installed in the voltage input
socket (U202) on the Microcontroller board.
• A loop-powered (AD1B21AN) or self-powered (1B22N) isolated V/I
converter must be installed in the water dewpoint socket (U700), or in
the water content socket (U702) on the Microcontroller board.
• A 1 %, 249 ohm resistor must be installed across the voltage input Ter-
minals (12+) and (13-) on connector J101 of the Termination board.
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