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Prothermo NMT81
5.3
Option 2: Converter with M20 mounting thread
This option model is designed specifically to connect with a Whessoe Varec 1700 series
average temperature probe. WB data is not available because the 1700 series does not have
WB.
182.3 (7.18)
5
Option 2: converter (Varec 1700, M20 threaded connection). Unit of measurement mm (in)
1
Existing 1700 series RT probe terminal box on-site
2
Lock nut
UK model M20 threaded type and Varec 1700 terminal housing connection procedure
1.
Use sealing tape to protect the threaded connection opening, and insert the cable
bundle (RTD signal entry cable) into the female threaded connection opening on the
terminal box.
2.
Screw on the NMT81 converter by rotating it at least 10 times clockwise, and secure it
with a lock nut.
A loose connection between NMT81 and Varec1700 terminal housings will lead to
malfunction due to ingress of flood and other factors.
This completes the procedure.
5.3.1
Option 2: Measurement functions
Option 2 has the same functions as option 1; however, option 2 is designed so that a special
M20 threaded connection opening fits directly in the existing terminal housing of a Varec
1700. The wiring of RTD signals from the probe to NMT81 is done in the terminal box of the
Varec 1700 and not on the NMT81 side. For this reason, there is no additional housing
provided to NMT81 as in option 1.
Endress+Hauser
37
(1.46)
32 (1.26)
2
Installation
1
A0042766
15
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