Hach pHD Sensor Manuel D'utilisation page 14

13. If the option for operator ID is set to Yes in the Calibration Options menu, enter an operator ID.
Refer to Change the calibration options
14. On the New Sensor screen, select whether the sensor is new:
Option Description
YES The sensor was not calibrated previously with this instrument. The days of operation and previous
calibration curves for the sensor are reset.
NO The sensor was calibrated previously with this instrument.
15. 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.
Reset calibration to defaults
To remove a bad calibration, replace the user calibration settings with the default calibration settings
using the Calibrate menu. Then recalibrate the sensor when needed.
1. Push the MENU key and select Sensor Setup, Calibrate, [Select Sensor], Reset Defaults.
2. If the passcode is enabled in the security menu for the controller, enter the passcode.
3. Select Yes and push Enter.
Change the calibration options
The user can select buffer solutions for pH calibrations, set a calibration reminder, enable auto
stabilization during calibrations or include an operator ID with calibration data from the Cal Options
menu.
1. Push the MENU key and select Sensor Setup, Calibrate, [Select Sensor], Cal Options.
2. Customize the options:
Option
SELECT BUFFER For pH only-changes the set of buffer solutions that are recognized for calibration to pH
AUTO STAB
CAL REMINDER
OP ID ON CAL
Data log
The controller provides one data log for each sensor. The data log stores the measurement data at
selected intervals (user configurable). The data log can be read out in a CSV format. For instructions
on downloading the logs, please refer to the controller user manual.
Refer to Select temperature parameters
information about setting time intervals for data storage in the data log.
Modbus registers
A list of Modbus registers is available for network communication. Refer to the CD for more
information.
14 English
on page 14.
Description
4.00, 7.00, 10.00 (default set) or DIN 19267 (pH 1.09, 4.65, 6.79, 9.23, 12.75)
Note: Other buffers can be used if the 1 point sample or 2 point sample option is
selected during calibration.
For pH only-enables the system to accept measurement signal values during calibrations
and advance to the next step of the calibration when the system determines the
measurement signal has stabilized-On or Off (default). Enter a stabilization range-0.01 to
0.1 pH unit.
Sets a reminder for the next calibration in days, months or years.
Includes an operator ID with calibration data—Yes or No (default). The ID is entered
during the calibration.
on page 10 and Select pH parameters on page 11 for