Hach-Lange POLYMETRON 9500 Ultrapure pH_ORP Module User Manual - Manual (Page 14)

Change calibration options
The user can define the set of buffer solutions used in calibration, set a calibration reminder or
include an operator ID with calibration data from this menu.
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 CAL OPTIONS and push enter.
4. Use the arrow keys to select an option and push enter.
Option Description
SELECT BUFFER For pH sensors only—changes the set of buffer solutions that are recognized for
calibration to pH 4, 7, 10, DIN 19267, NIST 4, 6, 9 or DIN 19266.
Note: Other buffers can be used if the 1 point sample or 2 point sample option is
selected during calibration.
CAL REMINDER Sets a reminder for the next calibration in days, months or years—select the required
delay from the list.
OP ID ON CAL Includes an operator ID with calibration data—YES or NO (default). The ID is entered
during the calibration.
Reset calibration options
The calibration options can be reset to the factory default options.
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 RESET DEFAULT CAL and push enter.
4. Push enter. All calibration options are set to the default values.
5. If the option for operator ID is set to YES in the CAL OPTIONS menu, enter an operator ID. Refer
to Change calibration options on page 14.
6. 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.
Impedance measurements (glass electrode pH sensors only)
To increase the reliability of the pH measurement system, the controller determines the impedance of
the glass electrodes. This measurement is taken every minute. During diagnostics, the pH
measurement reading will be on hold for five seconds. If an error message appears, refer to
Error list
on page 16 for more details.
To enable/disable the sensor impedance measurement:
1. Push the menu key and select SENSOR SETUP>[Select Sensor]>DIAG/TEST>IMPED STATUS.
2. Select ENABLED or DISABLED and push enter.
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