High Level Adjustment; Tc Sensor Calibration; Calibration Of The Measured Gas - Hach ORBISPHERE 51x Manual Básico Del Usuario

A screen is displayed showing the measured values and length of time the sensor has been under
calibration. These values are continually refreshed.
The value % last calibration is an informational message showing the difference between the
current and previous sensor calibrations.
The Signal within range and Stability reached boxes indicate whether the calibration is within
acceptable limits. When both boxes indicate YES, press Finish to accept the new calibration. If one
or both boxes continue to show NO you can still perform a calibration but it is not recommended
and the calibration should be aborted by pressing the Cancel button.
In the case of a calibration failure, attempt a second calibration after about 5 minutes. If the second
attempt also fails, then refer to your Hach representative for advice.
Note: If the Auto-End parameter is enabled then the calibration will be considered successful when the parameters
defined in Stop parameters are met.
If you have not accepted or cancelled the calibration after an elapsed time of 10 minutes then the
process will time-out.
7.4.1.4.3 100% humid air calibration (high range sensors only)
With this method, the sensor should be removed from the sample and exposed to air saturated with
humidity. Do this by putting a drop of water in the calibration cap before installing the cap on the
sensor. Press Start to start the calibration. The process is then the same as for the Zero calibration
described previously.

7.4.1.4.4 High level adjustment

Note: Before using this option, ensure a zero calibration has been successfully completed first.
This calibration exposes the sensor to a gas or a liquid sample with a known gas concentration. You
also have the option to reset the sensor's calibration parameters to factory settings (from drop-down
list for Cal. sample).
Press Start to start the calibration. The process is then the same as for the Zero calibration
described previously.

7.4.2 TC sensor calibration

7.4.2.1 Calibration of the measured gas

1. Before initiating a calibration process, the calibration parameters must be set by pressing on the
Modify button. The last calibration parameters are memorized, so this step can be ignored if the
correct parameters are already set. Similarly, if only the calibration value has changed, then this
can be updated directly instead of pressing the Modify button.
Option
Gas Phase
Gas unit type
Gas unit
Liquid
Value
Hold during calibration
Automatic calibration
stop
Interference enabled
2. Press OK to start calibration
• A calibration screen will be displayed showing current measurement data which is continually
refreshed.
24 English
Description
Select liquid or gas (direct calibration only)
Partial, fraction or dissolved (dissolved is for calibration in a liquid only)
The list of available units depends on unit type selected above.
Select as appropriate.
Enter the gas concentration according to the value in the calibration media.
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.
If selected, this takes into account the influence of interferences during
calibration. By default the same interference as during measurement is selected.