3-20
1010PFM-3G
Section 3
1012EC SERIES CABLE
THREADED PIPE FITTING
THERMOWELL
THERMAL COUPLANT
PIPE WALL
991TW TEMPERATURE SENSOR
CONNECTOR HEAD ASSEMBLY
SPRING LOADED
SENSING ELEMENT
THERMAL COUPLANT
991T CLAMP-ON TEMPERATURE
SENSOR(MATCHED PAIR REQUIRED)
CUSTOMER’S PIPE
1012EC SERIES CABLE
992EMTN MOUNTING
ASSEMBLY
NOTE: Some transducers require a right-angle adapter. This adapter should be installed
before placing the transducer in the tracks.
10. Connect the transducer cable, ensuring that you have observed the Upstream/Downstream orien-
tation in respect to the cable and the input jack on the flow computer. If this is a dual-channel unit,
make sure you are connecting the cables to the correct channel input jacks.
3.2 MOUNTING TEMPERATURE SENSORS (optional)
In order to accurately measure temperature differential in energy flow loops, Controlotron’s Energy
Flowmeters are designed to work with a pair of matched temperature sensors. These are available in
clamp-on style 991T, or in insert (thermowell) style 991TW. Both styles incorporate 1000 ohm platinum
RTD’s for high precision.
Clamp-on style sensors are mounted on the surface of the monitored pipe using 992EMT series
mounting assemblies. Apply a generous quantity of the thermal couplant provided to the tip of the
sensor and attach it securely to the cleaned pipe surface with the proper mounting assembly. Tem-
perature measurement anomalies resulting from variations in the ambient conditions can be mini-
mized by insulating the pipe and sensor after installation.
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