152 of 176 Troubleshooting - A1000
RPS - July 2007 - Edition 9
Operator Manual Anatel
13.3.3 I/O Tests
These pass/fail diagnostics verify the operation of the Sensor’s serial and digital I/O circuits. An
external loopback connector is required for these tests and should be attached to the
appropriate Sensor port.
To check operation of the Sensor’s I/O connections:
1) With the Sensor’s Diagnostics Menu displayed, specify I/O and press Enter to access
its options. The I/O Menu offers two options:
2) Use the Up and Down Keys to specify the desired communications test.
3) Press Enter to execute the test. The results are presented on the Controller display
and a corresponding printout is generated. If the Sensor fails either of the tests, check
the wiring before contacting Hach Ultra for assistance.
4) Press Esc repeatedly in order to return to previous display screens.
Fig 13-5 : I/O Diagnostics Screen
• RS-232C runs an individual loopback test on each of the connected serial ports.
A jumper must be applied to the RxD and TxD terminals on each of the
Sensor’s serial ports as shown.
• Digital I/O verifies the Sensor’s digital input and output connectors. A jumper
must be applied RS-232C PORTS 1-3 across the Sensor’s digital input and
output TxD terminals as shown.
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