OPERATION
OPERATING INSTRUCTIONS
GENERAL OPERATION
The CT124 Multi-Zone Temperature Monitor continuously scans temperature input from 1 to 8 RTD’s
(Resistance Temperature Detectors). It compares each reading to 5 separate trip points and activates relays
and a built-in alarm when any RTD senses an over- or undertemperature condition. The audible alarm
may be set to go off when any of the four relays are tripped, and/or independently at its own trip point.
Setting up the trip point temperatures and the actions of the relay and alarm outputs to input conditions
is covered in the Programming Instructions (see page 12). The following instructions describe the general
operation after programming is completed. We recommend that the operator have a copy of the completed
CT124 Setup Worksheet at hand for a complete description of the programmed operation.
Note: Viewing the zone, peak, or trip temperatures will not interrupt input scanning. However, input
scanning is interrupted and outputs remain unchanged while in the test and programming modes.
ZONE TEMPERATURES
Depending on its program, the CT124 normally displays:
•
The highest temperature sensed by an RTD, or
•
The lowest temperature sensed by an RTD, or
•
Any zone temperature selected for display.
To view zone temperatures:
Press
. The red light at the upper left corner of the button comes on.
Press
or
to see different zones. The light beside each zone comes on as it is displayed.
indicates the CT124 is not programmed to scan that zone.
example:
with zone 2 lit indicates that input RTD 2 is sensing 128°C.
PEAK TEMPERATURES
The CT124 stores both high and low peak temperatures in each monitored zone.
To view peak temperatures:
Press
. The red light at the upper left comes on.
Press
or
to see alternate high-low peaks for each zone.
example:
with zone 3 lit indicates a low point of -32°F sensed by input RTD 3.
indicates a high peak of 150°F.
To clear peak temperatures:
Press
while viewing a peak temperature to clear it. The current temperature in that zone becomes
the new peak and the display advances.
Minco Products, Inc.
CT124 Instruction Manual
10
Summary of Contents for CT124
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