User's Manual

TUNet Single Phase Retrofit Guide

P/N 900-0006 Proprietary and Confidential

2 Detailed Procedure

2.1 Open the meter

It will be necessary to remove the meter cover to proceed with the meter module retrofit. If the meter cover is sealed to the

meter base, remove the seal by cutting it with a diagonal cutter and pull the seal pieces from the base and the cover. Leave the

cover on until the meter base has been drilled.

2.2 Drill the meter base

2.2.1 Drill the GE and Itron Meters (I-70, I-210, CENTRON)

1. Place the meter glass face down on the work surface.

2. Place the drill alignment jig with the pins of the jig straddling the load side terminals of the meter. The drilling hole

of the alignment jig should be at the six o’clock position as shown in Figure 1.

3. With a 3/8” electric hand drill, and 3/8” bit, drill a hole in the meter base as shown in Figure 1.

4. After drilling the meter, clear the meter of any debris by removing the meter cover and clearing any loose particles.

Figure 1: Drill Alignment Jig

2.2.2 Drill the ABB AB-1

Note: ABB meters usually have venting holes at the bottom centre of the meter base. These holes must not be used as a guide

for drilling a 3/8" hole in the meter base because the vent hole does not provide the optimum alignment of the IR interface.

Figure 2: ABB AB-1 Vent hole with “crosshairs”

1. Place the meter glass face down on the work surface.

2. The vent hole is typically covered with a metal screen and a fibre filter. Remove the filter with needle nose pliers.

3. Place the drill alignment jig with the pins of the jig straddling the load side terminals of the meter. The drilling hole

of the alignment jig should be at the six o’clock position as shown in Figure 1.

4. With a 3/8” electric drill and a 3/8” bit, drill a hole in the meter base as shown in Figure 1.

5. After drilling the meter, clear the meter of any debris by removing the meter glass and clearing any loose particles.