Keithley 3720-ST User Manual

Series 3700A System Switch/Multimeter Reference Manual Section 4: Basic DMM operation
3700AS-901-01 Rev. D/June 2018 4-15
Autodelay and autorange settings
The following table provides times for autodelay and autorange time for the Series 3700A DMM
current functions.
Function
Detector
bandwidth
Range and delays
DC current
Not applicable
Range
10 A
100 A
1 mA
10 mA
100 mA
1 A
3 A
Autodelay
13 ms
2 ms
2 ms
2 ms
2 ms
2 ms
2 ms
Autorange
13 ms
2 ms
2 ms
2 ms
2 ms
2 ms
2 ms
AC current
Not applicable
Range
1 mA
10 mA
100 mA
1 A
3 A
3 or 30 Hz
Autodelay
200 ms
200 ms
200 ms
200 ms
300 ms
Autorange
200 ms
200 ms
200 ms
200 ms
300 ms
300 Hz
Autodelay
50 ms
50 ms
50 ms
50 ms
75 ms
Autorange
50 ms
50 ms
50 ms
50 ms
75 ms
Current measurement connections
See the Model 3721 information in the Series 3700 Switch and Control Cards Reference Manual for
connection information.
The 3721 switch card is the only card that supports DC current and AC current functions. You can
only assign DC current or AC current to channels 41 and 42. If DC current or AC current is assigned
to channels 1 to 40, error 1116 "function mismatch in configuration" is displayed. Also, if a function
other than DC or AC current is assigned to channel 41 or 42, error 1114 "function mismatch in
configuration" is displayed.
Current measurement procedure from the front panel
1. Press the OPENALL key to open all switching channels.
2. Select the current 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 ACI or DCI.
3. Use the RANGE ▲ and ▼ keys to:
▪ Select a measurement range.
▪ Adjust the attributes after selecting the function under the Config DMM menu.
4. Press the AUTO key to select autoranging (AUTO annunciator turns on).
5. Apply the currents 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 wheel once to select 3721 card slot number and adjust 1-6.
b. Press the navigation wheel a second time to select the start channel number.
c. Press the navigation wheel a third time to select the end channel.
d. Press the navigation wheel a fourth time to allow DMM configuration assignment to the channel or
range of channels.
e. Press the CLOSE key.

Keithley 3720-ST Specifications

General

Brand	Keithley
Model	3720-ST
Category	Multimeter
Language	English