Hach Orbisphere 410 Basic User Manual page 19

In the petroleum industry, the detection of oxygen is sometimes hampered by significant
concentrations of hydrogen sulfide in the sample. Hach Lange recommends using the H
interference option if the hydrogen sulfide concentration exceeds 0.15% in gas phase, or 5 ppm in
dissolved phase. To operate the oxygen sensor in these conditions requires using a different
sensor and electrolyte. When using this mode your system will experience sensitivity loss of about
50 times higher than the minimum sensitivity for the membrane.
1. Proceed as follows:
Option
CO2 or H2S
Chlorinity/Salinity Select Chlorinity, Salt or All disabled. For chlorinity or salt, it is required to enter the
Measured data storage
There is one measurement file which contains the data generated by the measurement cycle. The
measurement file is updated in volatile memory and regularly copied in non-volatile memory (file
back-up). At start up the measurement file in volatile memory is updated with the file from the non-
volatile memory.
Note: Data stored in volatile memory is lost when instrument is powered off; non-volatile memory is permanent. In
case of an accidental power off event the instrument resumes measurement storage after the last measurement
stored in flash.
1. Select Measurement file from the Measurement menu:
Option
Storage mode
RAM time
FLASH time
Save in flash now
Auto save in flash
Purge data
Start logging
measurements
Open data
Calibration
Calibrations can only be performed once the instrument has been installed and configured.
Note: The temperature sensor is factory calibrated and can only be changed by a Hach representative.
Description
Select CO , H S or All disabled.
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actual concentration in the sample.
Description
Select No storage if data storage is not required. Select Store once to start
recording measurements. When the volatile memory is full the recording of
measurement stops. Select Rolling buffer for continuous recording of
measurements. When the volatile memory is full the latest measurement set
replaces the oldest one (first-in, first-out)
The delay between two recordings of measurement data.
The delay between two data file transfers from volatile memory into non-volatile
memory. The last data file erases the previous one. This option is only available if
the Auto save in flash box is checked.
Press this button to store measurement data in flash immediately. After pressing
this button, press OK to initiate the process. A warning screen appears informing
you that the operation can take up to 30 seconds. Press Yes to continue or No to
abort.
Check this box to save measurements in flash automatically. Measurements are
saved at regular time intervals as defined in the FLASH time box.
Clear all data in the volatile and non-volatile memories.
Only available in Store once mode, this option starts or stops the measurement
recording session. Measurement recording ends automatically when the buffer is
full.
Opens a table showing the measurments stored in the volatile memory (RAM).
Note: If TPO or TPA calculation is enabled, a "TPO data" or a "TPA data" button will
be available underneath the "Open data" button described above. Pressing this
button will display the TPO or TPA calculated data in a screen similar to that for
standard data.
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