User's Manual

Operation: C1SD, C1ST, and C1SL Versions

5-4 CENTRON Meter Technical Reference Guide

mode program parameters are then retrieved from nonvolatile memory for use in

the Test mode. In the C1SL version, a status bit is set to indicate the register was

placed in Test mode.

The Test mode can be activated while in either Normal or Alternate mode using the

Test mode switch (see Figure 5.3) or a meter programming device. To activate the

Test mode with a programming device, refer to the PC-PRO+ documentation.

Immediately upon activation, the Test mode is indicated by a flashing “TEST”

annunciator in the lower left hand corner of the module display. The TEST

annunciator will not appear if there are no Alternate mode display items

programmed.

Figure 5.3 Test Mode

Refer to the PC-PRO+ documentation for information on selecting the Test mode

using a programming device. A programmable “Time-Out Length” from 1-to-99

minutes is available. After the programmed Time-Out Length has ended, the

initialized whenever the Demand Reset button is pressed.

The magnetic reed switch, when activated, advances the Test mode display to the

next quantity. Calculations performed in Test mode are performed in the same

manner and based on the same program parameters as in Normal mode with the

exception of interval (subinterval) length. Test mode interval length and the

number of subintervals are specified independently for Test mode. The results are

displayed according to the display configuration selected when the register is

programmed. To exit the Test mode and return to the Normal mode, do one of the

following:

• De-energize the meter.

• Push the Test mode button.

• Wait for the selected Test mode time-out to occur.

Calculated values performed in Test mode are not added to previous billing values

or stored for retrieval. After exiting Test mode, all billing data previously

transferred to nonvolatile memory is retrieved, an End of Interval (EOI) is

initiated, and a new demand interval begins.

Any time-dependent events such as rate switches, self-read, or daylight savings

time that occur while the meter is in Test mode are performed when the Test mode

is exited.

Test Mode

Switch