Hach Orbisphere 410 Basic User Manual page 22

Option
Hold during calibration
Automatic calibration
stop
2. Press OK to start calibration
• A calibration screen will be displayed showing current measurement data which is continually
refreshed.
• The value "% ideal current" is a percentage of the current against the ideal current for the
membrane type selected. If this percentage is not within the accepted range, an error message
is displayed and the calibration process fails. A warning message can be displayed when this
value is close to the boundaries, but when calibration can be accepted.
• The message is first displayed in the result box. The dialog box with the error message or the
warning is displayed when the finish button is pressed.
• The value "% last calibration" shows the ratio between the current measurement and the
previous sensor calibration.
• The value "% variation" indicates the variation during the last 3 measurements, which is the
stability of the measurements. A variation as low as possible is needed for a precise
calibration.
• The display shows the actual calibration parameters, and the actual readings (temperature,
barometer, current).
Barometric pressure calibration
Note: The barometric pressure sensor has been factory calibrated but should be periodically verified with a
precision certified barometer. This is only necessary if measuring in gas phase with fraction units (%, ppm).
The upper box shows the barometric pressure as measured by the instrument.
Using a precision certified barometer measure barometric pressure in the location where the
measuring instrument is used. Compare the values and if they are the same press Cancel, otherwise
enter the new barometric pressure value in the lower box and press Validation to validate the new
setting.
Services menu
There are a number of options available from this menu with the key options detailed below.
Calibration timer
The instrument can automatically remind the user when the next sensor calibration is due.
• To enable the timer, select Enable and enter a delay in days.
• The display shows the current instrument date and time, next calibration due date and time, and
the remaining days.
The next calibration date is updated when the sensor is calibrated.
Service timer
The sensor attached to your instrument will require periodic servicing and maintenance. The
instrument can automatically remind the user when the next sensor service is due.
• To enable the timer, select Enable and enter a delay in days.
• The display shows the current instrument date and time, the next sensor service due date and
time, and the remaining days.
After a service press the Service done button to update the next service date.
22 English
Description
On by default, this stops any output from the instrument during the calibration
process to avoid sending invalid information to any connected device.
If selected, when the stability criteria is reached, the calibration process stops
automatically.