Prothermo NMT 538
Hauser Systems & Gauging
13
Figure5: Threaded type connection
1. Install lower NPS threaded female connector along with free spinning coupling onto RTD
probe threaded connection until it is completely seated. Use a seal tape and rap it around on
the RTD probe’s threaded connection.
2. Install NMT538 housing along with included gasket in-between. Use a seal tape and rap it
around on the NMT538 housing side male threaded connector, then hand tight the free spin-
ning coupling until it stops.
3. Remove the cap cover and make sure the both side of cables have enough length to be con-
nected freely.
warning!
Do not pull either side cables or apply over-tension during this procedure. Internally torn cables
or loose connection can cause invalid temperature measurement.
4. After performing cable connection & positioning the face angle of NMT538, Tighten approxi-
mately 1/8th turn the free spinning coupling with a wrench from where it was hand tighten.
3.3.2
Wiring: NMT538 to RTD probe
Temperature signal cables
RTD cables will be directly connected to NMT538 input cables with simple cramp connectors
(included). Strip each end of cable approximately 1cm (3/8") and slip into the connector, then
pinch with pliers to secure the connection.
NMT538
Seal tape
(not included)
Seal tape
(not included)
T
ape winding
rotation
Tape winding
rotation
Gasket
(included)
Free spin
coupling
NPS 3/4
threaded connection
(RTD probe side)
to Average temp. element
RTD signal &
(WB capacitance coaxial)
cable from
Lower NPS threaded
female connector
probe
3 Installation
