Normally Closed

Contacts 1. Hardware Connections

Figure 2-3. Closed-Channel Resistance (NC Channels)

2.Equipment Setup

Set DMM to: 4-wire ohms, autorange.

Send *RST to the switch.

Send CLOS (@100:115) to the switch to open all NC contacts.

3.Closed-Channel Reading (channel 00)

Send OPEN (@100) to the switch to close channel 00.

Trigger the DMM and record the reading.

4.Open-Channel Reading (channel 00)

Send CLOS (@100) to the switch to open channel 00.

Trigger the DMM and verify that an open circuit is indicated (>108 ).

5.Closed- and Open-Channel Readings (channels 01-15)

Repeat steps 3 and 4 for channels 01 through 15. Use

CLOS (@ccnn) and OPEN (@ccnn), where

cc= switch card number (01-99, leading zero not necessary) nn = channel number (00-15)

24 Verification Tests

Chapter 2

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Agilent Technologies E1364A service manual Normally Closed