Kp Register Scale Factors; Configure Kyz Scale Factors - Arbiter Systems Power Sentinel 1133A Operation Manual

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3. To scale the KYZ Register Scale Factors, select Connection > Configure > Kp Register Scale
Factors or click the Kp button. Kp register scaling is explained below under Kp Register
Scale Factors.
4. Under "Value," select the (Scheduled) Value corresponding to the Description and type in
the scaling constant (see Kp Register Scale Factors below for details).
5. Click Apply to install the value(s) and click OK to close.
CAUTION: Solid-State KYZ relays (Option 06) should be ordered and installed prior to
configuring KYZ outputs. Standard mechanical relays are not rated for KYZ operation.
7.10.4

Kp Register Scale Factors

Correct Kp register scale factors are necessary for accurate KYZ pulse metering. Use the "Configure
Kp Register Scale Factor" interface shown in Figure 7.19 to set these.
Figure 7.19: Configure KYZ Scale Factors
Kp Register Scale Factors are expressed in basic units (e.g. Watt Hours per Pulse) and should
be set up to not exceed 20 pulses per second, the limit of the 1133A. To arrive at the minimum
Scale Factor value so not to exceed this threshold, take the maximum value of the basic unit being
measured and divide by 72,000. This should give you the absolute limit (minimum value) for a Kp
scale factor. Practical scale factors should exceed this minimum value so not to unnecessarily lose
information.
For example, if the maximum input value (including CT-PT ratios) is 240 kWh, then the
minimum scale factor for Watt Hours should be greater than 3.3333333 (240,000
. . . ). The value produced is the Kp Register Scale Factor (e.g. 3.333 Wh per pulse). Scale Factors
are directly proportional to each measured value. Therefore, greater measured values require greater
minimum Scale Factors.
Kp Over-Range Condition: An over range input condition will exceed the 20/second output
capability of 1133A, causing KYZ pulses to stabilize at that rate. If this is the case, for momentary
periods, the accumulator in the 1133A will store these counts and not degrade the Model 1133A
0.025% accuracy. If data has accumulated in the 1133A, then when the signal has dropped below
Configuring the Model 1133A
72,000 = 3.333