Option Description - Hach PAH500 Manual Del Usuario

• The calibration curve of the sensor is set at the factory for performance to specifications. No user
adjustments to the factory calibration curve are recommended unless required by a regulatory
agency for compliance reporting purposes, or a large repair of the sensor is done. Contact
technical support for more information.
Item to collect: Calibration standard or deionized water (0.0 ppb PAH)
1. Clean the sensor. Refer to
2. Select SENSOR SETUP > [select sensor] > CALIBRATE > 1 POINT MANUAL.
3. If the passcode is enabled in the security menu for the controller, enter the passcode.
4. Select an option.
Option Description
ACTIVE The controller outputs continue to represent the last measured value during the
calibration procedure.
HOLD The controller outputs are held at the last measured value during the calibration
procedure.
TRANSFER The controller outputs change to the transfer value during the calibration
procedure. Refer to the SC1000 Controller user manual to change the transfer
value.
5. Put the supplied valve in the fitting on the bottom of the sensor. Make sure that the valve is
closed.
6. Rinse the sensor with deionized water as follows:
a. Fill the sensor with deionized water.
b. Open the valve to discard the deionized water from the sensor, then close the valve again.
7. Measure the calibration standard as follows:
a. Put the contents of the ampule into the empty vial. Touch the top edge of the ampule to the
top edge of the vial to pull the liquid into the vial.
b. Use a pipette to fill the sensor with the calibration standard.
c. Open the valve to discard the calibration standard from the sensor, then close the valve again.
d. Use the pipette to fill the sensor with the calibration standard.
e. Put a plug in the fitting on the top of the sensor.
f. Push confirm.
g. Wait for the response change to the expected value (60 seconds maximum), then push
confirm.
8. Enter the PAH value of the calibration standard, then push confirm.
9. Remove the plug from the top of the sensor.
10. Open the valve to discard the calibration standard, then close the valve again.
11. Review the calibration result:
• COMPLETE—The sensor is calibrated and ready to measure samples. The calibration offset
value shows on the display.
• FAIL—The calibration offset is outside of accepted limits. Do the calibration again.
12. If the calibration result is complete, push confirm.
13. Remove the plug and valve to discard the calibration standard.
14. Discard the open ampule.
15. Discard the contents of the vial.
16. Connect the sample tubing to the sensor.
17. Start the flow of water to the sensor, then push confirm.
Clean the sensor on page 24. Keep the sample tubing disconnected.
English 19