Continuity Measurement; Resistance Measurement; Capacitance Measurement - AEMC 1050 User Manual

These values are available until another measurement is taken or the selector
switch is turned.
When measuring high levels of insulation (>1GΩ), it is advised that the guard
terminal be used to eliminate the influence of surface leakage currents. The guard
is connected between the two measurement contact points, and the surface sus-
ceptible to surface currents, (e.g. dusty, damp cable or transformer insulation). In
this case, alligator clips are preferable to test-probes held in the hand.
As soon as insulation measurement is stopped, the test circuit is automatically
discharged using the instrument's internal resistance.

4.3 Continuity Measurement

The measurement current is > 200mA from 0Ω to 20Ω and >140mA from 20Ω to
40Ω in this function.
This measurement serves to test the low resistance. The measurement ranges
increase automatically up to 40Ω with a maximum resolution of 0.01Ω.
• Select the 40Ω position with rotary switch.
• Connect the instrument to the test object.
• If the voltage present is > 3V, then measurement is prohibited.
• Start the measurement and read the results.
NOTE: It is possible to compensate for the lead resistance (see § 2.5.10)
NOTE: The R-DAR-PI and V/TIME buttons are not active for this function. There
is no automatic polarity change in continuity measurement.

4.4 Resistance Measurement

The measurement current is limited to 6mA in this function. The measurement
ranges increase automatically up to 400kΩ with maximum resolution of 0.01Ω.
• Select 400kΩ position with the rotary switch.
• Connect the instrument to the test object.
• If the voltage present is > 3V, then measurement is prohibited.
• Start the measurement and read the results.
During measurement, the potential difference at the input is indicated on the small
display (useful for measurement of multi-junction components: thyristors, high volt-
age diodes, etc).
The open circuit voltage is equal to the voltage of the instrument's battery.
NOTE: The R-DAR-PI and V/TIME buttons are not active for this function.

4.5 Capacitance Measurement

Capacitance measurement is automatically carried out during insulation measure-
ment. It is displayed after the measurement is stopped and the circuit is discharged,
Shop for AEMC products online at:
using the R-DAR-PI button.
Megohmmeter Models 1050 /1060
(see § 2.6.3)
(see § 2.6.3)
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