Temperature Calibration - Hach 5500 Serie Manual Del Usuario

1. Push the MENU key and select Sensor Setup, [Select Sensor],
Calibrate.
2. Select the type of calibration:
Option Description
Sample Cal Use a secondary verification instrument or titration to
measure the reference value.
Saturation Cal Use a process sample that is known to be saturated with air,
or aerate the sample.
3. If the passcode is enabled in the security menu for the controller, enter
the passcode.
4. 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.
5. With the sensor in the process sample, push ENTER.
The measured value is shown.
6. Wait for the value to stabilize and push ENTER.
7. For Sample Cal, measure the dissolved oxygen value with a secondary
verification instrument or by titration. Use the arrow keys to enter the
value and push ENTER.
8. For Saturation Cal, push ENTER to accept the calculated value, or
change the value if the water is known to be less than 100% saturated.
9. 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
14 English
Maintenance on page 15 and
more information.
10. If the calibration passed, push ENTER to continue.
11. If the option for operator ID is set to Yes in the Calibration Options
menu, enter an operator ID. Refer to
on page 15.
12. 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.
13. 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 that is at a known temperature.
Measure the temperature of the water with an accurate thermometer
or independent instrument.
2. Push the MENU key and select Sensor Setup, [Select Sensor],
Calibrate.
3. Select 1 PT Temp Cal and push ENTER.
4. Wait for the value to stabilize and push ENTER.
5. Enter the exact value and push ENTER.
6. 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.
Troubleshooting on page 16 for
Change calibration options