Watchdog II Mesh User Manual
P/N 86-0006-00
Rev E 01-2020
Page
16 of 38
1.6 Field Installation Instructions
1.6.1
Step 1: Determine the Positive Terminal on the Current
Shunt
Using a Fluke voltmeter to measure DC millivolts across the rectifier current shunt, determine the
positive terminal on the shunt.
It is the terminal that causes the meter to read a POSITIVE voltage
when connected to the positive (red) voltmeter lead.
Mark the terminal on the shunt with a +.
1.6.2
Step 2:
Turn off the rectifier AND shut off the circuit
breaker to the rectifier.
SAFETY FIRST! You will be working inside the rectifier, so make sure that the power is shut off
at the circuit breaker
1.6.3
Step 3: Connect Power to the Interrupter Module
Measure across various combinations of the transformer taps to find a voltage of 12 to 25 volts AC.
These are the taps that will be used to power the Interrupter Module. The Interrupter II may also be
powered from 115V or 230V AC.
.
1.6.4
Step 4:
Mount Satellite Modem (if satellite model was
ordered)
The Skywave satellite modem should be mounted within 10 feet of the RMU mounting location. Using
¼” X 1 1/2” lag screws mount the satellite antenna bracket to the typical wooden power pole that holds
the rectifier. If vandalism is a potential issue, the units should be mounted at a height that would
prevent casual tampering.
NOTE: The cellular version of the RMU has an internal antenna, so no separate antenna installation is
required and you can skip this step.
NOTE: The satellite antenna bracket MUST be mounted so that the antenna is pointed in the compass
direction and elevation angle recommended below.
Area of Country
Compass Direction
Elevation Angle
(angle up from horizon)
Northeastern US
175
°
- 185
°
(S)
35-40°
Southeastern US
175
°
- 185
°
(S)
35-40°
Midwest, Central US
175
°
- 185
°
(S)
25-30°
Southwest US, Texas
175
°
- 185
°
(S)
35-40°
Northwest US
175
°
- 185
°
(S)
30-35°