Cameron NUFLO MC-III EXP, User Manual

Page: 26 / 143

20
Section 2 MC-III™ EXP Flow Analyzer
Field Wiring
The MC-III EXP supports connections for the following: internal power (battery), external power, turbine
flowmeter input, pulse input, remote reset input, pulse output, 4 to 20 mA output, flowmeter frequency (amp
& square) output, and RS-485 output.
Wiring diagrams for each connection are provided below.
Caution: For a CSA-approved MC-III EXP installed in a hazardous location, all field wiring must
conform to wiring methods for explosion-proof installations as defined in the
National Electric Code for installations within the United States or as specified in the
Canadian Electric Code for installations within Canada. State and local wiring
ordinances may also apply.
To wire the MC-III EXP for operation, complete the following field connections:
1. Unscrew the cover of the enclosure and remove it.
2.
Using a small standard blade screwdriver, remove the two #4-40 × 7/8” screws located to the right and
left side of the display.
3. Lift the display/keypad assembly from the enclosure, making sure the circuit assembly does not contact
the enclosure.
4. Connect the lithium battery or alkaline battery pack to the J1 connector marked “BATTERY” near the top
of the circuit assembly.
5. Connect wiring for external power, if appropriate. See
Figure 2.8, page 21
.
6. Connect the flowmeter or pulse input wiring to terminal block TB1. See
Figure 2.9, page 22,
and
Figure
2.10, page 22
.
7. Connect wiring for the remote reset input to terminal block TB1, if appropriate. See
Figure 2.11, page 23
and
Figure 2.12, page 23.
8. Connect wiring for output signals, if appropriate. See
Figure 2.13, page 24, through Figure 2.17, page 27.
9. Place the circuit assembly over the standoffs and fasten with the two #4-40 × 7/8” screws, ensuring that
all connector wiring is inside the enclosure and in no position where it may be damaged when the enclo-
sure cover is replaced.
10. Recalibrate the MC-III EXP (if necessary).
11. If external and internal power supplies were removed, reset the clock to ensure that the time stamps in the
log data are accurate. The clock is reset using the MC-III interface software. See
Time/Date Synchroniza-
tion, page 56
.
12. Replace the enclosure cover.