Orp calibration procedure, Manual calibration (ph sensors only) – Hach-Lange POLYMETRON 9500 Ultrapure pH_ORP Module User Manual User Manual
Page 12
15. 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.
16. 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.
ORP calibration procedure
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 1 POINT SAMPLE 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 reference solution, push enter.
6. Wait for the value to stabilize and push enter.
7. Use the arrow keys to enter the reference value and push enter.
8. Review the calibration result:
• PASSED—the sensor is calibrated and ready to measure samples.
• FAILED—the calibration slope or offset is outside of accepted limits. Clean the sensor and
retry with a fresh reference solution. Refer to
on page 15 for more
information.
9. If the calibration passed, push enter to continue.
10. If the option for operator ID is set to YES in the CAL OPTIONS menu, enter an operator ID. Refer
on page 14.
11. 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.
12. 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.
Manual calibration (pH sensors only)
This option allows a manual update of the slope and offset values. The sensor does not need to be
removed from the process.
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