Keithley SourceMeter 2410 - Measure Ohms

1-12 Return to Section Topics 2400S-903-01 Rev. E / September 2011
Section 1: Introduction Series 2400 SourceMeter® Quick Start Guide
CAUTION When using the SourceMeter as a voltmeter only, voltage compliance must
be set higher than the voltage that is being measured. Failure to do so
could result in instrument damage due to excessive current that will flow
into the SourceMeter.
CAUTION When using the SourceMeter as a voltmeter only, DO NOT use auto range
and NEVER select a measurement range that is below the applied signal
level. Otherwise, high current drawn from the external source could
damage the external source or the test circuit.
Measure ohms
Measurement methods
There are two methods to measure resistance; auto ohms and manual ohms. In auto ohms, the
SourceMeter operates as a conventional constant-current source ohmmeter. You simply select an
ohms measurement range (or auto range) and take the reading from the display.
In manual ohms, the SourceMeter uses the V/I meas
urement method. After configuring the source
(V or I) and selecting a voltage or current measurement range, the Ω measurement function will
di
splay the calculated V/I ohms reading.
Table 1-3
Measure only (V or I) procedure
Procedure Details
1. Select source-measure
functions.
To measure voltage, press SOURCE I and MEAS V. To
measure current, press SOURCE V and MEAS I.
2. Set source level to zero. Use DISPLAY EDIT key to place cursor in source field
(Vsrc or Isrc), use RANGE down arrow key to select low-
est range, press MENU to display zero source level, then
press ENTER.
3. Set compliance higher
than the expected measure-
ment (see CAUTION 1).
Use DISPLAY EDIT key to place cursor in Cmpl field, use
RANGE arrow keys to select range, use edit keys to key in
compliance value, then press ENTER.
4. Select measurement
range (see Note).
Use RANGE arrow keys to select a fixed measurement
range. For best accuracy, use the lowest possible range.
5. Connect voltage or cur-
rent to be measured.
Connect DUT to SourceMeter using 2-wire connections
(see Figure 3).
6. Turn output on and take
reading from display.
Press ON/OFF OUTPUT key. Red OUTPUT indicator on.
7. Turn output off when
finished.
Press ON/OFF OUTPUT key. Red OUTPUT indicator off.
Note:When measuring current, auto range can be used. When measuring voltage, DO NOT use auto
range (see CAUTION 2).