HYDROLAB Surveyor HL Manuel D'utilisation page 15

• RS232 TTY communications module only: Field width (the number of characters sent back
for the parameter (1-9))
9. To add another parameter (maximum of 10), do steps
Calibration
Calibrate the sonde sensors before initial use of the sonde, at regular intervals and after sensor
maintenance or modifications.
Note: At initial release, this instrument cannot be used to calibrate the sensors or set the calibration interval. This
functionality will be added later with a firmware update. Refer to the Hydrolab Operating Software online help to
calibrate the sensors or change the calibration interval.
Do a sensor calibration check
A sensor calibration check is done between calibrations to identify if a sensor is still calibrated. Adjust
the calibration interval setting of the sensor as necessary based on the results of the calibration
check.
One calibration standard is measured during a calibration check. At the end of the check, the
software shows the actual (entered) value of the calibration standard and the measured value of the
calibration standard. Calculate the difference between the values to identify if the sensor is still
calibrated.
1. Push until three or four dots show at the top of the screen.
2. Push the RIGHT arrow until "Sonde HL" shows at the top of the display.
3. Select Sensors>[Select Sensor]>Check Calibration.
4. Complete the instructions that show on the display, then push OK.
5. When the difference between the values shown identifies that the sensor is not calibrated:
a. In the Calibration Interval field, enter the time interval before the next calibration is necessary.
Calibration intervals are different for different types of sensors and environmental conditions.
Calibrate as necessary.
b. Push .
c. Select User, then select the user that did the calibration check.
d. Optional: Select Log Note, then enter a note for the calibration check.
e. Select Fail (Check Failed) to record the calibration check.
Note: To not record the calibration check, select Cancel.
6. When the difference between the values shown identifies that the sensor is still calibrated:
a. In the Calibration Interval field, enter the time interval before the next calibration is necessary.
Calibration intervals are different for different types of sensors and environmental conditions.
Calibrate as necessary.
b. Push .
c. Select User, then select the user that did the calibration check.
d. Optional: Select Log Note, then enter a note for the calibration check.
Look at the calibration history
The calibration history shows the date, time, calibration type (if applicable), standard(s), slope, offset,
user information and calibration notes for each calibration done (completed or failed) and calibration
check done.
1. Push until three or four dots show at the top of the screen.
2. Push the RIGHT arrow until "Sonde HL" shows at the top of the display.
3. Select Sensors>[Select Sensor]>Calibration History. The completed sensor calibrations and the
saved calibration checks show.
6–8 again.
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