Tc Sensor Calibration - Hach ORBISPHERE 410 Manual Básico Del Usuario

attempting to calibrate. Then, loosely place the storage cap back on the sensor, holding it in place
with a few turns of its collar.
Set the calibration parameters accordingly and press calibrate.
Direct calibration
This procedure calibrates the oxygen sensor against a liquid sample containing a known level of
dissolved O flowing through the sample line.
2
The instrument displays the sensitivity of the sensor as a percentage of the sensitivity determined
when calibration was last performed.
Set the calibration parameters accordingly and press calibrate.
7.4.2.3 O sensor calibration
3
The sensor is either in contact with:
• Air at atmospheric pressure (In Air)
• O at known concentration (Direct Value). The gas can be dissolved or not.
3
The procedure is the same as for the O
measures O during calibration. The O
2
behaves in O . As a different voltage is used at the anode to measure O
2
measurement takes a long time to stabilize. To facilitate the follow up after an "O
negative values can be displayed.

7.4.3 TC sensor calibration

7.4.3.1 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
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.
22 English
sensor. In the case of the "In air" calibration, the sensor
2
coefficient is deduced taking into account how the sensor
3
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.
and O , the O
2 3 3
in air" calibration,
3