1730
Calibration Manual
20
Current Measurement
Fluke recommends using a divider with 30 Ω across the 1730 input and 10 kΩ in
series with high side of the input:
• Fluke PN 2114858 (10 k)
• Fluke PN 1757740 (30 Ω) – see Table 5 for the recommended assembly of
this divider. Best practice is to measure the resistor values at time of use.
1. Connect the Voltage-to-Current Input Cable Assembly to the Energy Logger
current probe input. See Table 4.
Caution
Be careful when you set the calibrator output voltages. High
voltages applied to the current input will damage the 1730.
2. Connect the VL1730 "N" lead to the calibrator AUX LO.
3. Connect the calibrator AUX HI output to the VL1730 L1+L2+L3 leads.
4. Stack the three calibration cables, PN4293284, together: red to red and blue
to blue.
5. Plug the attenuator into the calibrator Normal HI and LO.
6. Connect the stacked calibration cables, PN4293284, to the attenuator. The
blue leads connected to NORMAL LO.
7. For all ranges in Table 10, set the calibrator to the voltages indicated in the
given order. Check that the values are between the limits.
Table 10. Flexi Current Probe Input Verification
Range
Calibrator output
[1]
(57 Hz sine wave, 5V out AUX)
Nominal Reading
Energy Logger
Reading Limits
Direct Flexi Low
1.000 mV 1.000 mV 0.994…1.006
10.000 mV 10.000 mV 9.967…10.033
15.000 mV 15.000 mV 14.952…15.048
Direct Flexi High
10.00 mV 10.00 mV 9.94…10.06
100.00 mV 100.00 mV 99.67…100.33
150.00 mV 150.00 mV 149.52…150.48
Direct Clamp Low
5.00 mV 5.00 mV 4.98…5.02
10.00 mV 10.00 mV 9.97…10.03
50.00 mV 50.00 mV 49.89…50.11
Direct Clamp High
50.0 mV 50.0 mV 49.8…50.2
100.0 mV 100.0 mV 99.7…100.3
500.0 mV 500.0 mV 498.9…501.1
[1] Calibrator Output Impedance and 1730 loading will effect actual voltage being applied. Use of divider and
Spreadsheet described above recommended
8. When you are finished, set the calibrator to Standby.
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