In most cases, you can accept the default which is tenths of kilowatt hours for meters rated for 200 amps or less. For meters over 200 amps, the default is one kilowatt hour. In both cases, the resolution can be increased to one hundredth of a kilowatt hour by connecting a short piece of wire between the TEST and COMN terminals on the meter. Meters approved for California must run all the time in one hundredth of a kilowatt resolution.
If you need a different resolution, choose it from the list. In deciding what resolution to use, consider how long it will take the counter to advance to all nines then roll over to all zeroes. If this time will be less than the time between readings of the meter, you may want to use a different resolution.
Be sure that the current, voltage and number of current transformers won't cause more pulses that the meter is capable of sending to the counters. The meter is capable of delivering one pulse every 120 milliseconds. That equates to 30,000 pulses in an hour. To calculate the number of pulses your meter will generate in one hour use this.
Formula: Example:
volts x amps x
phases
120 x 200 x 3
_________________ = pulses per
hour ___________
= 7200
resolution x 1000 0.01 x 1000
The example shows that a California approved three phase meter running at 200 amps on all phases would generate 7200 pulses in 0.01 kwh (10 wh) mode which would be fine. If you tried to run it in .001 (1 wh) mode, it would generate 72,000 pulses which is more than twice what the meter can handle. Solving the equation a different way reveals that the maximum current would be 83.3 amps.