Function And System Construction; Function; Measurement System; Installation - Endress+Hauser iTEMP RTD TMT 187 Operating Instructions Manual

3 Function and system construction

Function

Measurement system

Installation conditions

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3 Function and system construction
3.1 Function
Electronic monitoring and transformation of an input signal into an analogue output
signal in industrial temperature measurement. The head transmitter is mounted in a
connection head form B or separated from the sensor in field housing.
3.2 Measurement system
Transforming the following input signals:
• Resistance thermometers (RTD) in 2-,3- or 4-wire connection systems or
• Thermocouples (TC)
into a scalable analogue output signal (4...20 mA or 20...4 mA).
Fault monitoring of:
• Measurement range override or undercut
• Sensor breakage and short circuit
Application in hazardous areas is certified to ATEX II 2(1) G and ATEX II 1 GEEx ia IIC
T4/T5/T6.
4

Installation

4.1 Installation conditions
• When installing and operating the unit please take note of the allowable ambient tem-
perature (see chapter 10 "Technical Data").
• When operating in hazardous areas please take note and operate within the limits set
in the certification (see chapter 10 "Technical Data").
Dimensions
The head transmitter dimensions can be found in Chapter 10 "Technical Data".
Installation point
• Sensor connection head to DIN 43 729 Form B
• Field housing
Installation angle
There are no limits as to the angle on installation.
1. not for thermocouples (TC)
Temperature head transmitter
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