Measurement Configuration; Measurement Advanced Configuration - Hach ORBISPHERE G1100 User Manual

Measurement Menu

6.2 Measurement configuration

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6.2.1 Measurement advanced configuration

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Display resolution: Maximum resolution depends on 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.
Thermal cutoff: This option is for information purposes only. It is possible to set a sample
high temperature limit, which if exceeded causes the system to display a "HOT" alarm
message. It is recommended, however, to disable this function.
Thermal cut off options: Disabled / enabled.
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Thermal cut off temperature: To be set according to conditions.
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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 (increase or decrease) the
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current measurement value. If the gas unit type or gas unit (defined in the main
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
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with the offset value applied.
Target value: Enter a target measurement value. The offset value is then automatically
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computed so that the displayed measurement value will be equal to the target value.
Compute offset: Use this button to recompute the offset value at any time during the
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measurement process. The offset value will be computed based on the current and
target measurement values.
Out of range protection: Enabled by default. When enabled and the measured value
exceeds the instrument specification, the measurement interval will be increased to
1minute 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: This parameter defines the interval for refreshing the measurement
value on the display. Set the value to between 2 and 60 seconds, according to your
response time requirements.
Sensor's spot selection
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Medium: Liquid or gas phase.
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Gas unit type: Partial, Fraction, Dissolved.
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Gas unit: This is the gas concentration measured by the
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sensor. When a composite unit (e.g. ppm ppb) is
selected the unit will change depending on the range of
the value to display. The list of available units depends on
unit type selected above.
Liquid: When medium is liquid, select water or a liquid with
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a different solubility (if available).
Important 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.