Temperature Calibration; Exit Calibration Procedure - Hach Ultrapure pH/ORP Manual De Usuario

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 MANUAL and push enter.
4. The measured calibration slope is displayed in mV/pH. Use the arrow keys to adjust the value
and push enter.
5. The calibration offset is displayed in mV. Use the arrow keys to adjust the value and push enter.
Note: To calculate the mV value, multiply the required pH offset value by the slope value.
6. 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. Refer to
on page 15 for more information.
7. If the calibration passed, push enter to continue.
8. If the option for operator ID is set to YES in the CAL OPTIONS menu, enter an operator ID. Refer
to Change calibration options
9. 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.

Temperature calibration

The temperature sensor has been calibrated at the factory. However, it is recommended to always
calibrate the temperature sensor before calibrating the measurement sensor.
1. Put the sensor in a container of water that is at a known temperature. Measure the temperature of
the water with an accurate thermometer or independent instrument.
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 1 PT TEMP CAL and push enter.
5. The raw temperature value is displayed. Push enter.
6. Enter the correct value if different from that displayed and push enter.
7. Push enter to confirm the calibration.

Exit calibration procedure

If the back key is pushed during a calibration, the user can exit the calibration.
1. Push the back key during a calibration. Three options are shown:
Option Description
QUIT CAL Stop the calibration. A new calibration must start from the beginning.
BACK TO CAL Return to the calibration.
LEAVE CAL Exit the calibration temporarily. Access to other menus is allowed. To return to the
calibration, push the menu key and select SENSOR SETUP.
2. Use the arrow keys to select one of the options and push enter.
on page 14.
Troubleshooting
English 13