Hach Ultra ORBISPHERE 510, Руководство оператора

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46 of 138 Measurement Menu - Orbisphere 510/511/512 Analyzers
Operator Manual
ORBISPHERE
TPO and TPA Parameters (portable instrument)
4.1.5 Stop Criteria Configuration (portable instrument)
The screen illustrated left is for TPO calculation, but the
parameters required for TPA calculation are the same.
Overflow volume: Total package size
Net content volume: Volume of liquid in the package
Press the “Compute” button to calculate the TPO or TPA.
The parameters can be changed and the value
recalculated if necessary.
TPO values are displayed in ppm, TPA values in mL.
To store the measurement, press the “OK” button.
Select “Menu / Main / Configure chan x” and press the
“Stop criteria” button.
Note:
The parameters available for configuration depend on the
“Type” of stop criteria being defined.
Available in “Sample measurement mode” (see
“Instrument Configuration” on page 44 ), this setting
allows configuration of the stop criteria for each channel:
Above threshold: The stop criteria is met when the gas
concentration is greater than the parameter entered in
"Threshold”
Below threshold: The stop criteria is met when the gas
concentration is lower than the parameter entered in
"Threshold”
Stability: The stop criteria is met when the variation of
the gas concentration is smaller than the parameter
entered in "Variation"
Time: The stop criteria is met when the elapsed time
reaches the “Max. time” parameter.
Note:
The number of samples taken into account to compute
the "Variation" can be adjusted using the parameter
"Depth".
The parameter "Max. time" is the maximum time
allowed to reach the target. If “Time” is not the type of
stop criteria, then when this delay has elapsed, the
measurement stops and the message “aborted” is
displayed.
⌧
The time filter allows you to filter the stop criteria. The
sample mode is stopped when the stop criteria is
fulfilled for a time greater than the parameter "Time
Filter".
As an example, if criteria is set to "Above threshold"
and “Time Filter” is set to 10 sec. the measurement
stops when the gas concentration is above the
"Threshold" for more than 10 seconds.