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Option
Description
Display
resolution:
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.
Thermal cutoff:
To protect the sensor, the thermal cutoff function allows for setting a sample high
temperature limit. If exceeded (during a Cleaning In Place cycle for example) the
electrical signal to the sensor is cut off, the measurement session is suspended and the
system displays a
HOT
alarm message. The system resumes when temperature drops
to 90% of the specified cutoff temperature.
• Thermal cut off options: Disabled / enabled.
• Thermal cut off temperature: To be set according to conditions.
Purge gas:
From the drop-down list, select the purge gas being used for the TC sensor.
TC sensor advanced configuration
1.
Select the
Advanced
button on the
Measurement configuration
screen:
Option
Description
Enable ext. pressure
sensor
Check as appropriate.
Enable negative
concentration
Check as appropriate.
Hold recovery time
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.
Continuous purge
during thermal cut off
If thermal cutoff has been enabled, then check this box to ensure that a
continuous purge of the TC sensor takes place while the measurement session
is suspended due to the thermal cutoff temperature value being exceeded.
Note: To manually set the TC sensor into a continuous purge mode, press the
Continuous Purge button that is available from the Services - Diagnostic -
Channel x - Amplifiers menu.
Offset and slope
corrections
Enable correction as appropriate. If enabled, the correction values for offset and
slope must be entered. These values cannot be negative.
Liquid to gas factor
Enable correction as appropriate. If checked, the percentage correction factor
must be entered. This value cannot be negative.
Note: If you believe you need to enable these corrections, it is advisable to
contact a Hach Service Representative first.
Measured data storage
There is one measurement file per channel which contains the data generated by the measurement
cycle.
1.
Storage modes:
Option
Description
No storage
Storage is disabled.
Store once
When the volatile memory is full (10,000 positions), the recording of measurement stops.
Rolling buffer
When the volatile memory is full, the latest measurement set replaces the oldest one
continuously (first-in, first-out).
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Содержание Orbisphere 51 Series
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