Hach ORBISPHERE 51 Série Manuel D'utilisation Simplifié page 20

Option
T cut off
T cut off value
7.3.2.2 K-M1100 advanced configuration
Note: The offset feature described below should be used for minor measurement adjustments only, and not as an
alternative to a sensor calibration. Make sure your sensor has been correctly calibrated before applying this feature.
1. Select the Advanced button on the Measurement configuration screen:
Option
Offset enabled
Offset value
Measurement
Target value
Compute offset
Out of range
protection
Measurement
interval
Hold recovery time
7.3.2.3 TC sensor configuration
1. Select Configure channel from the Measurement menu:
Option
Membrane
Medium
Gas unit type
Gas unit
Display
resolution:
20 English
Description
If this temperature is exceeded the measurement session is suspended and the system
displays a HOT alarm message. The system resumes when the temperature drops to
90% of the specified temperature. It is recommended to Enable this feature to maximize
sensor life and system performance.
Set to 5°C above the sample temperature.
Description
Check this box to enable the user measurement offset option. If checked enter an
offset value or a target value:
Enter an offset value to manually adjust the measurement value. If the gas unit type
or gas unit (defined in the Measurement configuration screen) are changed the
offset value is automatically reset to zero.
This field cannot be updated. It shows the current measurement value with the offset
applied.
Enter a target measurement value. The offset value is automatically computed so the
displayed measurement value will be equal to the target value.
Select this button to recompute the offset value at any time during the measurement
process. The offset value will be computed based on the current and target
measurement values.
Check this box to enable the out of range protection (recommended). When enabled
and the measured value exceeds the instrument specification, the measurement
interval will be increased to 1 minute to protect the lifetime of the sensor spot. If
disabled, the lifetime of the spot can be negatively impacted if the sensor is exposed
to high oxygen concentrations for long periods of time.
Set the value to between 2 and 60 seconds to define the interval for refreshing the
measurement value on the display.
This parameter defines the interval during which the outputs remain frozen after the
measurement is no longer on HOLD. Set the value to between OFF and 10 minutes,
according to the timing of your setup.
Description
Sensor's membrane number selection.
Liquid or gas phase.
Partial, Fraction, Dissolved.
The list of available units depends on unit type selected above.
Note: This is the gas concentration measured by the sensor. When a composite unit is
selected (e.g. ppm » ppb) the unit will change depending on the range of the value to
display.
Maximum resolution depends on gas, membrane and unit. A maximum of 5 digits can be
displayed. Decimals can be limited to 0, 1, 2 or 3 decimals for easier reading. That does
not affect the actual resolution of data measured and stored, but only the data displayed.