Test The Sensor; Diagnostic And Test Menu - Hach 9181600 Manual De Usuario

6. If surface deposits remain, soak the measuring end of the sensor in dilute acid, such as muriatic
acid (or other dilute acid), for a maximum of 5 minutes.
Note: The acid should be as dilute as possible, not stronger than 3% HCL. Experience will determine which
acid to use and the appropriate dilution ratio. Some stubborn coatings may require a different cleaning agent.
Contact technical support.
7. Rinse the sensor with water and return to the soap solution for 2 to 3 minutes to neutralize any
remaining acid.
8. Rinse the sensor with clean water.
9. Calibrate the sensor in a beaker using a reference solution(s).
10. Install the pH sensor in the flow cell and tighten the lock ring.
Troubleshooting

Test the sensor

Pre-requisites: Two pH buffers (pH 7 and pH 4 or pH 10) and a multimeter.
Note: If a calibration fails, clean the sensor and then repeat the calibration. Only test the sensor if the problem is
not corrected by maintenance.
1. Put the sensor in a pH 7 buffer solution and wait for the temperature of the sensor and buffer to
reach room temperature.
2. Disconnect the red and white wires from the gateway.
3. Measure the resistance between the white and red wires to verify the operation of the
temperature element. The resistance should be 1000 ohms at approximately 0 ºC or 1176 ohms
at 45 ºC.
If the temperature element is good, reconnect the wires to the gateway.
4. Push the MENU key and select Sensor Setup, Diag/Test, Signals. The pH reading should be
between –50 and + 50 mV.
5. Rinse the sensor with water and put in a pH 4 or pH 10 buffer solution. Wait for the temperature
of the sensor and buffer to reach room temperature.
6. Compare the mV reading in the pH 4 or 10 buffer to the reading in the pH 7 buffer. The reading
should differ by approximately 160 mV.
If the difference is less than 160 mV, call technical support.

Diagnostic and test menu

The diagnostic and test menu shows current and historical information about the chlorine analyzer.
Refer to Table 2. To access the diagnostic and test menu, push the MENU key and select Sensor
Setup, Diag/Test.
Option
GATEWAY INFO
CAL DAYS
CAL HISTORY
RST CAL HISTORY
SIGNALS
SENSOR DAYS
16 English
Table 2 DIAG/TEST menu
Description
Shows the firmware version, driver version, serial number and boot version for the
controller and the types of sensors connected to the controller.
Shows the number of days since the sensor was last calibrated.
Shows a list of the times when the sensor was calibrated. Push ENTER to scroll
through the entries and view a summary of the calibration data.
Resets the sensor calibration history. Requires passcode.
Shows the sensor measurement signal value in mV.
Shows the number of days the sensor has been in operation.