User guide

Signet 2759 pH/ORP Simulator and System Tester

SW2

Run

Cal

SW1

BLK

RED

WHT

SHLD

Input from 2750

Output to

external equipment

4. Troubleshooting 2750 pH/ORP Electronics

Before using the 2759:

• The most common cause of pH/ORP system problems is electrode depletion.

• Perform routine electrode maintenance, including cleaning and inspection of the electrode, then calibrate the system.

• See the electrode and 2750 Sensor manuals for detailed information.

If the problem persists, or to verify general system operation:

This test procedure requires the 3-2759.391 adapter cable.

Connecting the 2759 output to the 3-2759.391 adapter cable then connecting the adapter into the 2750 sensor electronics simulates the

output of the pH/ORP electrode.

• Always use the HI button with the 3-2759.391 adapter cable.

• Connect the 2759 to the 3-2759.391 adapter cable, then insert adapter into 2750 electronics.

• Monitor the 2750 output using current monitoring device.

• Slide the 2759 Mode selector switch to the proper position (pH or ORP).

• Press output simulation buttons and then HI button.

(The HI button must be pressed after each output button.)

See Section 5: Response Chart for proper display.

Does the meter read a valid temp and pH/ORP?

Yes: The system is working ﬁ ne or there is a problem with the electrode. Replace the electrode if necessary.

No: Problem is in 2750 Sensor Electronics. Replace the 2750.

• Press any output simulation button to turn the 2759 on.

• Press OFF button to turn the 2759 off.

ORP

10K