Fluke 2635A, Руководство пользователя

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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 k
Ω
scale measures 30 k
Ω
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