Hach-Lange ORBISPHERE KM1100 Basic User Manual - Manual (Page 16)

Option Description
T cut off 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.
T cut off value Set to 5°C above the sample temperature.
Measurement 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 Description
Offset enabled Check this box to enable the user measurement offset option. If checked enter an
offset value or a target value:
Offset 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.
Measurement This field cannot be updated. It shows the current measurement value with the offset
applied.
Target value Enter a target measurement value. The offset value is automatically computed so the
displayed measurement value will be equal to the target value.
Compute offset 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.
Out of range
protection 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.
Measurement
interval Set the value to between 2 and 60 seconds to define the interval for refreshing the
measurement value on the display.
Ext. pres. sensor The external pressure sensor option is not available.
Measurement alarms configuration
Set the thresholds for the low/high concentration levels according to the application.
1. Select the Alarms button on the Measurement configuration screen:
Option Description
Low Low 2nd stage for too low concentration alarm.
Low 1st stage for too low concentration alarm.
High 1st stage for too high concentration alarm.
High High 2nd stage for too high concentration alarm.
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