Hach D3433B8.99 User Manual page 11

process sample is used, the reference value must be determined with a secondary verification
instrument. Be sure to enter the T-factor in Temperature element of the Settings menu for accurate
temperature compensation.
During calibration, data is not sent to the datalog. Thus, the datalog can have areas where the data is
intermittent.
4.4.2 Change calibration options
For sensors connected to a conductivity module, the user can set a reminder or include an operator
ID with calibration data from the Calibration options menu.
Note: This procedure is not applicable to sensors connected to an sc digital gateway.
1. Select the main menu icon, then select Devices. A list of all of the available devices shows.
2. Select the sensor and select Device menu > Calibration.
3. Select Calibration options.
4. Select an option.
Option
Calibration
reminder
Operator ID for
calibration
4.4.3 Zero calibration procedure
Use the zero calibration procedure to define the unique zero point of the conductivity sensor. The
zero point must be defined before the sensor is calibrated for the first time with a reference solution
or process sample.
1. Remove the sensor from the process. Wipe the sensor with a clean towel or use compressed air
to make sure the sensor is clean and dry.
2. Select the main menu icon, then select Devices. A list of all of the available devices shows.
3. Select the sensor and select Device menu > Calibration.
4. Select Zero calibration (or 0-point calibration).
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. Hold the dry sensor in the air and push OK.
7. Do not push OK until the calibration result shows on the display.
8. Review the calibration result:
• "The calibration was successfully completed."—The sensor is calibrated and ready to measure
samples. The slope and/or offset values are shown.
• "The calibration failed." —The calibration slope or offset is outside of accepted limits. Repeat
the calibration with fresh reference solutions. Clean the sensor if necessary.
Description
Sets a reminder for the next calibration (default: Off). A reminder to calibrate the sensor
shows on the display after the selected interval from the date of the last calibration.
For example, if the date of the last calibration was June 15 and Last calibration is set to
60 days, a calibration reminder shows on the display on August 14. If the sensor is
calibrated before August 14, on July 15, a calibration reminder shows on the display on
September 13.
Includes an operator ID with calibration data—Yes or No (default). The ID is entered
during the calibration.
English 11