User's Manual

Installation
CENTRON Meter Technical Reference Guide 2-3
Programming the C1SD,T,L Meter
The personality module should be powered prior to programming. The module can
be programmed using the optical connector. The default communications rate
when programming through the optical tower is 4800 baud; 9600 baud is
selectable. Refer to PC-PRO+ documentation for detailed programming
information.
Retrofitting with Personality Modules
CENTRON meters can be upgraded to increase functionality by changing the
Personality Modules.
To change or add a Personality Module:
1 Remove power from the meter.
2 Remove the outer (polycarbonate or glass) cover.
3 Remove plastic inner cover by holding the meter with both hands and applying
equal pressure on either side of the three and nine-o’clock positions. The inner
cover is held in place by four plastic tabs on the meter base.
4 Remove the black board-to-board connector between the circuit board and the
metrology board by pulling it by its middle while moving it side-to-side (see
Figure 2.1). To maintain the integrity of the connector, only remove it when
you are upgrading the meter.
The practice of knowingly installing Form 12S/25S meters into metering sockets with
either missing or disconnected fifth terminal jaws in the meter socket is NOT
recommended for CENTRON Form 12S/25S meters.
The following guidance should be followed when using the Form 12S/25S CENTRON
meter:
• This version of the meter should not be used in a non-Form 12S or 25S metering
service.
• The meter's 5th terminal should be properly installed on the meter in a location
defined in the CENTRON Technical Reference Guide.
• The fifth terminal jaw in the meter socket should be properly connected to the
service neutral and installed in the correct location.
• The metering service should match the class, form and voltage rating on the meter's
nameplate.
Failure to follow these recommendations will result in damage to the CENTRON Form
12S/25S meter and void all product warranties.
Do not power ON the meter without the inner cover in place. Power the meter OFF before
removing the inner cover. Personality modules are sensitive to ESD damage. Take
appropriate grounding measures before retrofitting!