Hach 8311 Benutzerhandbuch Seite 14

11. Return the sensor to the process and push enter. The output signal returns to the active state
and the measured sample value is shown on the measure screen.
Note: If the output mode is set to hold or transfer, select the delay time when the outputs return to the active
state.
Calibration with the process sample
The sensor can remain in the process sample, or a portion of the process sample can be removed
for calibration.
1. Push the menu key and select SENSOR SETUP>[Select Sensor]>CALIBRATE.
2. If the pass code is enabled in the security menu for the controller, enter the pass code.
3. Select SAMPLE CAL and push enter.
4. Select the option for the output signal during calibration:
Option Description
ACTIVE The instrument sends the current measured output value during the calibration procedure.
HOLD The sensor output value is held at the current measured value during the calibration procedure.
TRANSFER A preset output value is sent during calibration. Refer to the controller user manual to change
the preset value.
5. With the sensor in the process sample, push enter. The measured value is shown. Wait for the
value to stabilize and push enter.
6. Measure the conductivity value with a certified secondary verification instrument. Use the arrow
keys to enter this value if different from the value displayed and push enter.
7. Review the calibration result:
• PASS—the sensor is calibrated and ready to measure samples.
• FAIL—the calibration is outside of accepted limits. Clean the sensor and retry. Refer to
Troubleshooting
8. If the calibration passed, push enter to continue.
9. If the option for operator ID is set to YES in the CAL OPTIONS menu, enter an operator ID. Refer
to Change calibration options
10. On the NEW SENSOR screen, select whether the sensor is new:
Option Description
YES The sensor was not calibrated previously with this controller. The days of operation and previous
calibration curves for the sensor are reset.
NO The sensor was calibrated previously with this controller.
11. Return the sensor to the process and push enter. The output signal returns to the active state
and the measured sample value is shown on the measure screen.
Note: If the output mode is set to hold or transfer, select the delay time when the outputs return to the active
state.
Calibration with a reference solution (inductive conductivity sensors)
Calibration adjusts the sensor reading to match the value of a reference solution. Use a reference
solution that is at the same value or higher than the expected measurement readings.
Note: If the sensor is calibrated for the first time, be sure to complete the zero calibration first.
1. Thoroughly rinse the clean sensor in deionized water.
2. Push the menu key and select SENSOR SETUP>[Select Sensor]>CALIBRATE.
3. If the pass code is enabled in the security menu for the controller, enter the pass code.
4. Select SOLN CAL and push enter.
14 English
on page 18 for more information.
on page 17.