Keithley 2790 User Manual

5-26 Model 2790 SourceMeter
®
Switch System User’s Manual
Test procedure – HIPOT
WARNING The following test procedure involves hazardous voltages. It is the
responsibility of the customer to operate instruments in a safe manner.
Be sure to read and follow the instructions for connecting and wiring
the tester in Section 4 before operating the equipment.
NOTE To ensure the reliability of the HIPOT test, it should be performed after verifying
contact (Contact checks) and the output of the V-source (V-source readback).
Single stage inflator — Perform Test Steps 1 through 7 in Table 5-6.
Dual stage inflator — Perform Test Steps 1 through 11 in Table 5-6.
Table 5-6
Test procedure – HIPOT
Test Step Command Sequence Front Panel Operation
1) Reset 2790 and
open all channels.
*RST Press SHIFT > press SETUP > select RESTORE:
FACT.
2) Set V-source to
500V.
SOUR:VOLT 500,(@128)
(Include a 250msec program delay to
allow source to settle).
Press SHIFT > press CARD > select CONFIG >
select SLOT1: 7751 or 7753 > display V-C28 > set
to 500.0 V.
3) Select and enable
the high ohms
calculation.
CALC1:FORM S1V
CALC1:STAT ON
Press SHIFT > press MATH > select S1VOHMS.
4) Close channels to
perform HIPOT
test.
ROUT:MULT:CLOS
(@101,103,108,116,118,
121,122,123)
Press CLOSE > select MULTI > select 101 > select
103 > select 108 > select 116 > select 118 > select
121 > select 122 > select 123 > press EXIT.
5) Verify channels
that are closed
(optional).
ROUT:MULT:CLOS? Press SHIFT > press CARD > select VIEW > select
SLOT2: 7751 or 7753. Press EXIT when finished.
6) Perform
measurement.
READ? Take reading from display.
7) Perform cable
discharge and open
all channels.
ROUT:OPEN:ALL Press OPEN > select ALL.
The following steps are used to test insulation resistance for the second bridgewire of a dual stage inflator:
8) Close channels to
perform HIPOT
test for second
bridgewire.
ROUT:MULT:CLOS
(@104,106,108,116,118,121,
122,223)
Press CLOSE > select MULTI > select 104 > select
106 > select 108 > select 116 > select 118 > select
121 > select 122 > select 123 > press EXIT.

Keithley 2790 Specifications

General

Brand	Keithley
Model	2790
Category	Switch
Language	English