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Front Panel Operations
Configuring a Measurement Channel
2
2-11
Configuring a Channel to Measure Resistance
Perform the procedure in Figure 2-6 to configure a channel for measuring resistance. In
preparation, the instrument must be in the inactive mode (not scanning or monitoring)
and the desired channel must be selected (see Figure 2-3). To exit at any time (changes
not saved), press the C key.
The resistance to be measured can be connected using one channel (two-terminal
connection) or two channels (four-terminal connection). The four-terminal connection
provides increased measurement precision. The two channels used in a four-terminal
connection are a decade apart (n and n+10), for example, channel 3 (n) and 13 (n+10).
Only the lower channel is configured.
Restrictions
Four-Terminal Channels. Four-Terminal configurations are limited to channels 1 to 10
(n). The channel a decade higher (n + 10) is automatically reserved for use.
FUNC
ENTER
SET FUNC
OFF
°F [°C]*
Hz
Ω
VAC
V DC
Auto
10.000 M
3.0000 M
300.00 k
30.000 k
3.0000 k
300.00
ENTER
SET FUNC
Typical
Required
Selecting the Resistance Mode. Press the
FUNC key to access the SET FUNC (Set
Function) menu. Press the up/down arrow keys
until Ω (ohms) is displayed, then press the
ENTER key.
Selecting the Measurement Scale. Select a
fixed scale or Auto (autoranging). A fixed scale
indicates an upper measurement limit. For
example, the 30.000 kΩ scale measures 30 kΩ
ohms or less. Measurements beyond the scale
limit will cause an OL (overload) display. The x1
(unity or x 1) multiplier indicates a reading in
ohms; the k (kilo or x 1,000) multiplier indicates a
reading in kilohms; the M (mega or x 1,000,000)
multiplier indicates a reading in megohms.
In Auto (autoranging), the instrument chooses the
scale for the best measurement resolution.
When scales are changed, the scan is
momentarily slowed.
* Depends on
temperature scale.
** Channels 1 to 10.
2T
4T**
SET FUNC
ENTER
Selecting the Terminal Mode. Select the two-
terminal (2T) or four-terminal (4T) mode. 4T
automatically clears configuration data from the
channel a decade higher (n+10). For example,
selecting channel 3 for 4T operation will
automatically clear channel 13 of all configuration
data and lock it out from further use.
op18f.eps
Figure 2-6. Configuring a Channel to Measure Resistance