Keithley 3720-ST User Manual

Series 3700A System Switch/Multimeter Reference Manual Section 4: Basic DMM operation
3700AS-901-01 Rev. D/June 2018 4-21
Resistance measurements from the front panel
Inputs:
Do not apply more than 425 V
PEAK
between INPUT HI and LO. Failure to observe this
caution may result in instrument damage.
Switching cards:
Do not apply more than 300 VDC or 300 V
RMS
(425 V
PEAK
) for AC waveforms
between any two pins. Failure to observe this caution may result in switching module
damage.
For example, if INPUT channel 1 HI is 300 VDC from channel 1 LO, channel 1 LO must be

0 VDC from chassis ground.
Perform the following steps to measure resistance:
1. Press the OPENALL key to open all switching channels. Refer to DCV for DMM function, range,
and other settings.
2. Connect the resistances to be measured.
3. Select the resistance measurement function by pressing the CONFIG key, and then pressing the
DMM key. FUNC flashes on, then off. Press the ENTER key or wheel. Function? is displayed on
the first line of the display and the second line displays available functions. Use the left or right
arrow keys or the knob to select TWOWIREOHMS, FOURWIREOHMS, or COMMONSIDE.
4. Use the RANGE ▲ and ▼ keys to:
▪ Select a measurement range
▪ Adjust the attributes after selecting the function under the Config DMM menu
▪ Press the AUTO key to select autoranging (AUTO annunciator turns on)
5. Apply the resistances to be measured.
6. If using a Series 3700A switch card, perform the following steps to assign a range of channels
and assign the channel a DMM configuration:
a. Press the navigation once to select 3700 card slot number and adjust 1 to 6.
b. Press the navigation a second time to select the start channel number.
c. Press the navigation a third time to select the end channel.
d. Press the navigation a fourth time to allow DMM configuration assignment to the channel or range of
channels.
e. Press the CLOSE key.
7. Press the TRIG key and observe the display. If the "Overflow" message is displayed, select a
higher range until a normal reading is displayed (or press the AUTO key for autoranging). For
manual ranging, use the lowest possible range for the best resolution.
8. To measure other switching channels, repeat steps 5 and 6.
9. When finished, press the OPENALL key to open all channels.

Keithley 3720-ST Specifications

General

Brand	Keithley
Model	3720-ST
Category	Multimeter
Language	English