Hach 9586sc Basic User Manual page 21

8.2.2 Temperature calibration
It is recommended to calibrate the temperature sensor once a year. Calibrate the temperature sensor
before calibrating the measurement sensor.
1. Measure the temperature of the water with an accurate thermometer or independent instrument.
2. Push the menu key and select SENSOR SETUP>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. The temperature offset is displayed.
8.2.3 Zero calibration
The zero value has been factory calibrated. Use the zero calibration procedure to define the unique
zero point of the sensor.
1. If the sample concentration is < 10 ppb, for best results it is recommended to use the optional
zero calibration cartridge (refer to
the sensor in place. Otherwise remove the sensor from the process and rinse in distilled water.
2. Push the menu key and select SENSOR SETUP>CALIBRATE.
3. If the pass code is enabled in the security menu for the controller, enter the pass code.
4. Select ZERO CAL and push enter.
5. 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.
6. If not using the optional zero calibration cartridge place the clean sensor in a hydrazine free
solution such as ultra pure water, push enter.
7. Wait for up to one hour for the value to stabilize and push enter.
8. Review the calibration result:
• PASS—the sensor is calibrated and the offset is displayed.
• FAIL—the calibration is outside of accepted limits. Clean the sensor and retry. Refer to
Troubleshooting
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
to Change calibration options
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.
Replacement parts and accessories
on page 23 for more information.
on page 22.
on page 24) and leave
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