Keithley 2790 User Manual

Model 2790 SourceMeter
®
Switch System User’s Manual 5-13
Table 5-1
Test procedure – shunt bar
Test Step Command Sequence Front Panel Operation
1)
Reset 2790 and
open all channels.
*RST Press SHIFT > press SETUP > select
RESTORE: FACT.
2)
Set I-source to
1mA.
SOUR:CURR 0.001,(@127) Press SHIFT > press CARD > select
CONFIG > select SLOT1: 7751, 7752,
or 7753 > set I-C27 to 01.00 mA >
press ENTER > press EXIT or
ENTER.
3)
Select and enable
the low ohms cal-
culation.
CALC1:FORM S1I
CALC1:STAT ON
Press SHIFT > press MATH > select
S1IOHMS.
4)
Close channels to
test bridgewire.
ROUT:MULT:CLOS
(@101,102,117,
118,124,121)
Press CLOSE > select MULTI > select
101 > select 102 > select 117 > select
118 > select 124 > select 121 > press
EXIT.
5)
Verify channels
that are closed
(optional).
ROUT:MULT:CLOS? Press SHIFT > press CARD > select
VIEW > select SLOT1: 7751, 7752, or
7753. Press EXIT when finished.
6)
Perform measure-
ment.
READ? Take reading from display.
7)
Open all channels. ROUT:OPEN:ALL Press OPEN > select ALL.
Test step notes:
1. Resetting the 2790 opens all channels, selects the DCV function (auto range), and selects the I-source of the 7751/7752/7753 mod-
ule. For remote programming, *RST places the 2790 in the one-shot trigger mode. For front panel operation, FACT defaults places
the 2790 in the continuous trigger mode.
2. This step sets the I-source to output 1mA. Do not use a higher test current for this dry circuit test. For front panel operation and a
7751/7753 module, the V-source output setting will be displayed after setting the I-source output.
3. This step selects the low resistance calculation (R = V
MEAS
/ I
SOUR
). Selecting S1IOHMS sets DMM to DCV, 1V range.
4. This step closes the channels to make the test connections for the shunt bar test. It assumes shunt bar is connected to Bank 1 of a
7751, 7752, or 7753. Channel 124 is closed before channel 121 so that the clamp is in place before connecting source to signal
backplane. Channels are closed in order listed.
5. This step is optional. Use it to verify that the correct channels are closed for the test.
6. For remote programming, READ? triggers and requests a single reading.
7. Always open all channels at the beginning and end of a test.

Keithley 2790 Specifications

General

Brand	Keithley
Model	2790
Category	Switch
Language	English