User's Manual

Operation: C1S Version
CENTRON Meter Technical Reference Guide 4-3
Figure 4.3 ZRO-C2A Resetter Connected to the CENTRON
The ZRO-C2A is a pocket-sized handheld device for resetting the electronic meter
readings in the CENTRON LCD kWh meter (C1S) and the R300 meter (C1SR). The
ZRO-C2A also resets the tamper indicators in the C1SR.
The ZRO-C2A requires that the meter Not Be Powered. The device connects to
the CENTRON meter through a hole in the plastic inner cover located at the 12
o’clock position on the meter (see Figure 4.3). Extending from the ZRO-C2A is a
cable terminating in a connector which mates to the programming connector of
the CENTRON.
Beginning February 20, 2002, the C1SR module for the CENTRON meter uses a
new EEPROM component. This new EEPROM operates at a different voltage level
requiring revision to the CENTRON resetter.
The ZRO-C2A Resetter works with both pre-June 2003 and Post-June 2003 LCDs.
Use of a ZRO-C or ZRO-C2 resetter without the C2A upgrade WILL CAUSE DAMAGE to
the personality modules on both the C1S LCD and C1SR meters produced after the new
EEPROM implementation date; damaged modules will show “Error” on the display.