GW Instek GDS-122 User Manual - Manual (Page 44)

Using the Multimeter
87
14B
Measuring Current
DC current
specifications
(details: page
208H
98)
Range &
Accuracy
Max input
40mA ±(1% + 1 digit)
400mA ±(1.5% + 1 digit)
20A ±(3% + 3 digits)
400mA (direct input)
20A (via the extension module)
AC current
specifications
(details: page
209H
98)
Range &
Accuracy
Max input
40mA ±(1.5% + 3 digits)
400mA ±(2% + 1 digit)
20A ±(5% + 3 digits)
400mA (direct input)
20A (via the extention module)
Panel operations 1. Press the A switch to select the
current (Ampere) measurement. If
a warning message appears, press
any key to resume measurement.
A
A
Battery level
Measurement
unit
Scaling factor
F1-F5 menu
Auto/Manual
range
Run/Stop
Delta
measurement
result
Measurement
result
Meter
-83.60mA
DCA/ACA
2. Press the AUTOSET key
repeatedly to select DC or
AC current measurement.
AUTOSET
Measuring 0mA
to 400mA
1. Connect the test leads to the
terminals:
COM for the black lead
mA/A for the red lead
400mA
MAX
mA/A COM
(black) (red)
If the range is set at 20A,
press F4 (mA) and change it
to mA range.
F2
mA
20A mA
GDS-122 User Manual
88
2. Select automatic range by
pressing F3 (Auto) or manual
by F1 (Manual). The indicator
at the top left corner of the
display changes accordingly.
F1
Manual
F3
Auto
MANUAL AUTO
Measuring
400mA to 20A
1. Connect the Current
Extension module to the
COM & mA/A terminals.
Then, connect the test leads
to the extension module.
20 AMP
400mA
MAX
mA/A COM
(black) (red)
2. Press F5 (20A) and select the
20A range. The MANUAL
range indicator activates.
(Auto range is not available)
F5
20A
MANUAL
Freezing the
measurement
To freeze the measurement, press the
RUN/STOP key. The measurement
result will be retained and the
indicator at the top right corner of the
display changes to STOP. To unfreeze,
press the RUN/STOP key again. RUN/STOP
RUN
STOP
Measuring delta
current
To measure the delta value, press F2
(II/
Δ). The measurement result at the
moment moves to the top right corner
of the display, and the measurement
result becomes the difference between
the original result.
2. Measurement
reset to zero
20.0mA
1. Press F2 3. Delta value
displayed