Waters Prep Series Installation And Maintenance Manual page 124

To perform a stop flow input test:
1. Attach a jumper wire from the Stop Flow switch on the rear panel to the
Gnd terminal, also on the rear panel.
2. Press ENTER.
• If the test succeeds, the screen displays
• If the test fails, the screen displays
3. Press ENTER.
4. Remove the jumper wire.
5. Press ENTER to proceed to the next test.
External inject test
The external inject (INJ) switch accepts a signal from the injector to start a
run. This test verifies that the INJ switch is functioning.
To perform an external inject test:
1. Attach a jumper wire from INJ on the rear panel to a Gnd terminal on
the rear panel
(see the
2. Press ENTER.
• If the test succeeds, the screen displays
• If the test fails, the screen displays
3. Press ENTER.
4. Remove the jumper wire.
5. Press ENTER to proceed to the next test.
External switch (S1 to S4) output test
This test verifies that the external switches, S1 to S4, are functioning. This
test sets up for the next test, the Hold Output test, by directing you to move
the jumper wire before pressing ENTER.
3-40 Troubleshooting, Testing, and Maintenance
figure "Rear panel terminals" on page
GOT STOP FLOW
DID NOT GET STOP FLOW
3-39).
.
GOT INJECT
DID NOT GET INJECT
.
.
.