Programming instructions

Verification Tests 65
With the test fixture installed, and a Multimeter (i.e. an Agilent 34401A)
connected between the shorted low lines (TP1) and the shorted high lines
(TP2), the GP Relay module is tested by successively closing each relay
while checking for an indication of the closure on the Multimeter.
Tests Procedure To perform the Operation Verification Tests:
1. Remove the wiring terminal block from the GP Relay module;
2. Install the related test fixture onto the GP Relay module;
3. Set the Multimeter to measure resistance. “Zero” the Multimeter;
4. Press Mon and specify the slot occupied by the GP Relay module;
5. Press S.LIST and specify all channels to be scanned;
6. Connect the Multimeter between TP1 & TP2 on the test fixture
(Figure 4-2);.
7. Press Card Reset to reset the GP Relay module, the Multimeter
should indicate that all relays are open (very high resistance or
overload indication);
Note If the Multimeter is indicating a very low resistance, one or more of the
relays is remaining closed. You need to do more tests to isolate the clumsy
damaged relay(s).
8. Successively press Step while observing the displays on the Agilent
3499A/B/C and the Multimeter. The Agilent 3499A/B/C’s display
should show a number corresponding to the closed relay. The clumsy
damaged relay(s) can be isolated in this way.
Correction If during Step 8, one or more relays did not close as described, a problem
exists either in the Controller board or the related GP Relay module. Replace
this GP Relay with another same one and perform the tests as described
above to isolate the problem.
If during step 8, the appropriate relays closed, but one or more of the
resistances were higher than the Initial Closed Channel Resistance (refer to
Chapter 1 on Page 1), the corresponding relay is defective.
If the GP Relay module is defective, replace it with a new one (the relays are
not replaceable parts, refer to Chapter 6 on Page 85 for more information).
Matrix Modules Verification Tests
The Matrix modules available with the Agilent 3499A/B/C include:
Agilent N2262A 4 x 8 2-wire Matrix module;
Agilent 44473A 4 x 4 2-wire Matrix module;
Agilent N2265A Multifunction module (4 x 4 2-wire Matrix).
Test Fixture The test fixture can be constructed by configuring the related Matrix