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ALPHA meter
IL42-4001S
Battery installation and replacement
Time-of-use meters are typically shipped with the battery installed and connected. If the battery is
requested to be shipped disconnected, separately, or as a replacement, see the technical manual for
procedures for battery installation or replacement.
It is important that the battery not be connected unless the meter has been powered for at least 1
minute from the AC line within the last hour. It is important that the meter is not energized while the
battery is being installed or replaced (see the technical manual). After connecting the battery and re-
energizing the meter, the display should be checked to verify proper operation (that is, scrolling from
one display quantity to the next). Failure to follow the correct sequence for battery connection can
result in early battery discharge, the register being inoperative, or both.
Relay output color coding
Multiple relay output configurations are available with high voltage, solid state relays. The relay outputs
can be identified based on the number of output leads and their color coding. The following
configurations are available:
• 1 relay with 6 output leads (see Figure 1)
• 2 relays with 6 output leads (see Figure 1)
• 4 relays with 8 output leads (see Figure 2)
• 4 relays with 9 output leads (see Figure 3)
• 6 relays with 12 output leads (see Figure 4)
In all cases, the output leads exit the meter using approximately 24 inches of cable. Regardless of the
configuration present, the relays are assigned as follows:
• For ALPHA and ALPHA Plus meters:
- KYZ1 is dedicated to kWh delivered.
- KYZ2 is dedicated to kVAh delivered (for A1K or A1K+ meters) or kVARh delivered (for A1R or A1R+
meters)
- When present, KYZ3 is dedicated to kWh received.
- When present, KYZ4 is dedicated to kVAh received (for A1K or A1K+ meters) or kVARh received (for
A1R or A1R+ meters)
• For A3 ALPHA meters:
- All relays are fully programmable. Sources for the relays can be any basic metered quantity, EOI,
load control, PQM test failure, or relay-related alarm condition. See the A3 ALPHA Meter Technical
Manual (TM422190B or later) and the Metercat User Guide (TM42-2204B or later) for specific
information.
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