6
Installing and Wiring RTD and Probe
The RTD measures flowing gas temperature. Procedures presented in
this section enable the user to install the RTD into the meter run and wire
leads to the main electronics board.
Totalflow Materials Supplied
•
RTD Probe with 10’ of cable. Optional lengths 15’, 25’, 30’, 40’,
and 50’.
•
One (1) thermowell with ¾" NPT threads. Optional threads are
½" and 1".
•
Nylon tie wraps
Customer Materials Supplied
•
Customer must specify or provide Thermowell "U" length.
•
Teflon
tape
1. Install thermowell into meter run.
2. Using snap ring pliers, adjust probe length
so that it is spring loaded against bottom
of thermowell.
3. Remove one of the hole plugs from the
µ
FLO enclosure and install cord connector.
Remove nut, sealing ring and rubber
grommet from cord connector. Slide nut,
sealing ring and grommet over RTD cable and insert cable through
body of cord connector. Allow enough cable to extend into unit for
connecting wires to RTD termination block J9. (See Figure 5)
4. Secure the cable with the grommet sealing ring and nut.
Note:
Charging source and Power should be removed from unit
before performing any field wiring.
5. Connect RTD probe to the
µ
FLO’s RTD connector as follows:
Before making connections to terminal block, remove spade lugs if
attached and trim wire ends back 1/4". Remove J9 terminal block
from the
µ
FLO’s main electronics board. (See Figure 5)
6. Loosen terminal block securing screws, insert wire, and then
retighten. Reinstall terminal block with wires attached.
