BASIC
MEASUREMENT
29
Select Current range
Auto range
To turn the automatic range selection
On/Off, press the AUTO key.
Manual range
Press the Up or the Down key to select
the range. AUTO indicator turns Off
automatically. If the appropriate range
is unknown, select the highest range.
Resolution / Full scale @ slow rate
Selection list Range
Resolution Full
scale
(GDM-8251)
Full scale
(GDM-8255)
10mA
0.1µA 12.0000mA
19.9999mA
100mA
1µA 100.000mA
100.000mA
10A
100µA 10.0000A 10.0000A
Note
*10A range is not available for AC+DC Current.
For more detailed range, see the specification at page111.
GDM-8200 Series User Manual
30
2W/4W Resistance Measurement
Measurement
type
2-wire
Uses the standard V-COM ports.
Recommended for measuring resistances
larger than 1k
Ω
.
4-wire
Compensates the test lead effect using the
4W compensation ports,, in addition to the
standard V-COM ports.
Recommended for measuring sensitive
resistances smaller than 1k
Ω
.
For 2-wire resistance measurement,
press the 2W/4W key once.
1. Activate
resistance
measurement
For 4-wire resistance measurement,
press the 2W/4W key twice.
2. 2W resistance
mode display
appears
2W(4W) +
Ω
Indicates 2W(4W) Resistance
AUTO
Indicates Automatic range selection
10M
2nd display shows the Resistance range
3. Connect the
test lead and
measure
Connect the test lead. For 2-wire resistance, use the V
and the COM port. For 4-wire resistance, use the V and
the COM port, plus the 4W sense, and LO port for
sensing. The display updates the reading.
2W connection
COM
4W connection
COM
4W
SENSE
LO
