Electrical Connections; Calibrating The Voltage Input - Ametek 241CE II User Manual

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RUN Mode
MonitorCFGWater
Measurement Option
PN 903-8797, Rev A

Electrical Connections

The external water signal to the analyzer must be a 4–20 mA input.
To display this signal on the User Interface, connect a 4–20 mA external water
signal to the spare analog input Terminals 12+ and 13- on connector J101 on
the Termination board in the Ex d Electronics Enclosure.
If required, this signal can be remotely displayed, such as from a Data Acquisi-
tion System. In this case, the 4–20 mA external water signal is still connected
to spare analog input Terminals 12+ and 13- on connector J101. The external
water signal must be retrieved by the remote display device via a loop-pow-
ered or self-powered V/I from the analyzer. For connections to the remote dis-
play device, use output Terminals 2+ and 3- for water dewpoint or 6+ and 7-
for water content on connector J101.

Calibrating the Voltage Input

Before the analyzer can accurately output the external water signal, or at any
time the input ranges for these outputs have been changed, certain analyzer
parameters must be configured and calibrated.
To configure the analyzer to display external water dewpoint or external water
content on its User Interface:
1. From the MonitorCFG menu, make the following changes:
a. View the Water Measurement Option sub-menu.
To display the external water dewpoint measurement, press '+' or '–' to
enable H2O DP:EXT (external water dewpoint).
To display the external water content measurement, press '+' or '–' to en-
able H2O CT:EXT (external water content).
b. View the PLo sub-menu and press '–' to change the setting to -1.0 KPA. This
will disable pressure signals from being displayed on the User Interface.
Leave the PHi at the default value of 13790 KPA.
c. View the ExLo sub-menu and change it to the external device's low output
range for either water signal (water dewpoint or water content).
View the ExHi sub-menu and change it to the external device's high
output range for either water signal (water dewpoint or water content).
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Appendix A A-3