Full Product Manual

Document: September1, 2009 Page 6of 10

Steps Load Measurement Current

1 No-Load V= No load Voltage H-N

Load H-N, V1= Voltage H-N

Load H-N, V2 =Voltage H-G

Load H-G, V3=Voltage H-N

5 Load H-G, V4=Voltage H-G

To calculate the impedance of each conduct enter the values from the table above and

calculate the impedance each conductor

If the method used to measure current employs a shunt resistor the internal shunt

resistance of the meter should be taken into account in your calculations. On most

DMM’s this shunt resistance is around 0.1 ohm.

Enter “Calculated Impedance” measurements into Table 3 below.

Measure the PEAK voltage and enter in Table3

Measure Frequency and enter into Table 3

Measure Neutral to Ground Voltage and enter into Table 3

Enter calculated %VD for 12 amps, 15 amps, and 20 amps and enter in to Table 1 below

Reference Measured Voltage drop section

For best accuracy monitor RMS Voltage, Peak Voltage, N-G voltage during UUT test.

These measured values could change.

Performance Verification Preparation

To complete the performance verification the Measured Values column must be filled out

in Table 3 through standardization practice or calculated methods. See

STANDRADIZING A BRANCH CIRCUIT above. Then plug in the Surtest and take

readings to fill out the SureTest Reading column in Table 3

Note: The SureTest™ only takes reading when first plugged in. AC line voltage, peak

and Frequency are the only continuous updated reading. Ground impedance is only

measured when the meter goes to that reading. If you are on a GFI protected circuit the

ground impedance measurement will most likely trip the device.

Calculated Impedance

=(V-V

)/I

rN=(V

-V

)/I

rG=(V

-V

)/1

=(rZ-rN)

rZ = Total branch circuit Impedance

rN = Impedance of neutral conductor

rG = Impedance of the Ground wire

rH= Impedance of the Hot or High

conductor