Measurement Modes; Rotary Position Ω+A; Standard Mode - AEMC 6417 User Manual

Clamp-on ground resistance tester

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6.1 Rotary Position W+A

Selection of Standard mode is performed in the SET-UP (see § 4.4, menu #9).

In Standard mode, only one measurement screen is available. The clamp

measures the loop impedance (W) (at the fixed frequency of 2083Hz) and the

leakage current.

NOTE: Since the measurement frequency is audible, the operator hears a beeping

signal. This is neither an operating fault nor an alarm, and it cannot be eliminated.

This audible signal is amplified by the presence of current in the loop.

The alarm thresholds can be configured as desired (see § 4.4, menus #4, #5 &

#6).

6.1.1.1 Making a Measurement

■ Turn the rotary switch to the Ω+A position, and wait several seconds

■ Clamp around the conductor to be measured. If the clamp is incorrectly

■ If necessary, use the HOLD button to freeze the measurement.

■ If necessary, use the MEM button to store the measurement.

NOTE: If the measured impedance is less than 1W, the measurement display

alternates between the value measured and the word LOOP, in order to call the

user's attention to the risk of measuring a local loop at the test point that does

not include the earth/ground measurement.

Clamp-on Ground Resistance Tester Model 6417

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6. MEASUREMENT MODES

while the instrument performs internal calibration.

closed, the

icon is displayed.

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