Hach Polymetron, User Manual

Page: 14 / 144

8. Review the calibration result:
• Passed—the sensor is calibrated and ready to measure samples.
The slope and/or offset values are shown.
• Failed—the calibration slope or offset is outside of accepted limits.
Repeat the calibration with fresh reference solutions. Refer to
Maintenance on page 15 and Troubleshooting on page 16 for
more information.
9. If the calibration passed, push ENTER to continue.
10. If the option for operator ID is set to Yes in the Calibration Options
menu, enter an operator ID. Refer to
Change calibration options
on page 14.
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.
12. 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.
Temperature calibration
The instrument is calibrated at the factory for accurate temperature
measurement. The temperature can be calibrated to increase accuracy.
1. Put the sensor in a container of water.
2. Measure the temperature of the water with an accurate thermometer
or independent instrument.
3. Push the MENU key and select Sensor Setup, [Select Sensor],
Calibrate.
4. Select 1 PT Temp Cal and push ENTER .
5. Wait for the value to stabilize and push ENTER .
6. Enter the exact value and push ENTER .
7. Return the sensor to the process and push ENTER .
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. A calibration for a second sensor (if present) can
be started. To return to the calibration, push the
MENU key
and select Sensor Setup, [Select Sensor].
2. Use the arrow keys to select one of the options and push ENTER .
Change calibration options
The user can set a reminder or include an operator ID with calibration
data from the CAL OPTIONS menu.
1. Push the MENU key and select Sensor Setup, [Select Sensor],
Calibrate, Cal Options.
2. Use the arrow keys to select an option and push ENTER .
Option Description
CAL REMINDER Sets a reminder for the next calibration in days, months or
years—Off (default), 1 day, 7, 30, 60, or 90 days, 6 or
9 months, 1 or 2 years
OP ID on CAL Includes an operator ID with calibration data—Yes or No
(default). The ID is entered during the calibration.
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