Fluke-1625

GEO Earth Ground Testers

Description of the Operating Elements

Detail of Panel

66

Panel Description

Panel Description

LCD Display

1. Digital display of measured value2. Measuring function field to display measuring

function3. Unit field: V, Ω, kΩ, Hz4. Special characters for operator guidance

RA 2-pole, 3-pole MeasurementsTo make 2-pole or dead-earth measurements, connect a jumper between terminals H/C2 and S/P2 with the supplied connector cable. Refer to Figure. Then follow steps 1 thru 4 except use only earth electrode and the auxiliary earth electrode with minimum distance between them of 20 m.

A Select function RA 3-pole. Display is as shown below.

RA 4-pole Measurements

RA 3-pole Selective Earth Resistance Measurement withCurrent Clamp

RA 4-pole Selective Earth Resistance Measurement withCurrent Clamp

Measurement of Resistances• Resistance Measurement (R~)

This measuring function determines the ohmic resistance between 0.001 Ω and

300 kΩ. The measurement is done with AC voltage. For measurements of very low resistances a compensation of the connecting leads is suggested (see “Compensation of Measuring Lead Resistance”).

• Resistance measurement (RF)

In this measuring mode all resistances from 0.001 Ω to 3 kΩ can be measured with

DC voltage and automatic polarity reversal as per EN61557-5. To achieve highest accuracy 4 pole measurements are possible. To balance the extension lead, a compensation has to be done.