UNI DM-1170A, Руководство по эксплуатации

Страница: 13 / 23

- 11 -
terminal.
Press SELECT Primary display Secondary display
Analog bar, MAX/MIN/AVG,
REL, HOLD functions
DCmA DCmA Available
ACmA ACmA Available
(AC+DC)mA (AC+DC)mA ACmA Disable
ACmA+Hz ACmA Hz Disable
5.2.2 AC/DC Current Measurement (ACA, DCA)
The measurement of AC/DC current has four modes: DCA, ACA, (AC+DC)A and ACA +Hz.
1) Press function key
20A .
2) Press SELECT key to select measurement mode.
3) According to poetical demands, press REL , MAX/MIN and 2nd VIEW keys to have relative measuring or
record.
4) The meter is default in auto range mode and will automatically select a most suitable range. To select a
range manually for the measurement, press RANGE key to select a proper range. There are two ranges
to choose from: 8.0000A/20.000A
5) Connect the black test lead to “ COM ” terminal and the red test lead to “ 20A ” terminal.
6) Other operations apply the same as explained in section 5.2.1.
Press SELECT Primary display Secondary display
Analog bar, MAX/MIN/AVG,
REL, HOLD functions
DCA DCA Available
ACA ACA Available
(AC+DC)A (AC+DC)A ACA Disable
ACA+Hz ACA Hz Disable
5.3 Resistance Measurement
WARNING: To avoid damage to the meter or the measurement equipments disconnect circuit
power and discharge all high voltage capacitors before measuring resistance. Use the DC function to
confirm that the capacitor is discharged.
CAUTION: When measuring low resistance, the resistance of the test leads may cause an
error of 0.1 Ω ~0.5 Ω in the test results. To avoid this error, first short the test leads, next press REL key.
The primary display will be null and the secondary display displays the resistance of test lead. Measure
the to-be tested resistance and the result will be displayed on the primary display.
The measurement of resistance has three modes: normal, continuity and high resistance.
Normal mode ( Ω )
1) Press function key OHM .
2) According to practical demands, press REL , MAX/MIN and 2nd VIEW keys to have relative measuring or
record.
3) The meter is in auto range mode and will automatically select a most suitable range. To select a range
manually for the measurement, press RANGE key to select a proper range. There are six ranges to
choose from: 800.00 Ω /8.0000k Ω /80.000k Ω /800.00k Ω /8.0000M Ω /80.000M Ω
4) Connect the black test lead to “ COM ” terminal and the red test lead to “ V Ω Hz ” terminal.
5) Touch the probes to the test points and read the display.
Press SELECT Primary display Secondary display
Analog bar, MAX/MIN/AVG,
REL, HOLD functions
Ω Ω /k Ω /M Ω MAX/MIN/AVG, REL values Available