User's Manual

Operation: C1SD, C1ST, and C1SL Versions
5-20 CENTRON Meter Technical Reference Guide
demand reset and to access the Alternate and Test modes. A tertiary security code
allows read-only access. For more information about security codes, refer to the
PC-PRO+ documentation.
Calculations
Energy
Calculation of energy is continuously incremented by multiplying the energy pulse
weight by the measured energy. The energy pulse weight is calculated by the
following formula:
The energy in a given interval is the product of the number of pulses received
during that interval times the pulse weight:
Demand
Calculation of demand is always based on rolling or block intervals. Demand
calculations use three constants; the watthour constant (Kh), the demand interval
length, and the register multiplier.
The weight of an incoming pulse is determined according to the following formula:
The demand in a given interval is the product of the number of pulses received
during that interval times the pulse weight:
kWh Pulse Weight
kwh
Pulse
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

Kh 1000× Register Multiplier==
Energy kWh()Number of Pulses
kWh
Pulse
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

×=
kW pulse weight
kw
pulse
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

Kh 1000 Register Multiplier 60/Dem. Int. Length××⁄=
Demand kW()Number of Pulses kW Pulse Weight×=