Hach ORBISPHERE 51 Serie Manuel D'utilisation Simplifié page 21

• For oxygen measurements - CO
• For hydrogen measurements - Temperature, H
• For nitrogen measurements - Temperature, H
Note: If you believe you need to enable any of the above, it is advisable to contact a Hach Lange Service
Representative first.
7.3.7 Measured data storage
There is one measurement file per channel which contains the data generated by the measurement
cycle.
1. Storage modes in continuous measurement mode:
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).
2. Storage modes in sample measurement mode:
Option
Only final measurement
Only when sample mode started The measurements when the sample mode is started are saved.
All measurements
7.4 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.
7.4.1 Definitions
To calibrate the gas to measure (main gas), the user usually puts the sensor in the main gas without
any interfering gas.
Calibrations can only be performed once the instrument has been installed, configured and each
channel has been set up. You must also ensure that you have the correct access rights to access the
calibration menu.
Select sensor calibration from the calibration menu, then select the channel to calibrate.
There are two types of gas sensor calibration available, depending on the gas being measured and
the type of sensor being used:
1. In Air: For Oxygen and Ozone with an EC sensor.
2. Direct value: Any gas with either an EC or TC sensor. This calibration exposes the sensor to a
gas with a known partial pressure, or a liquid sample with a known gas concentration.
, H S, Chlorine, Salt, H
2 2
O, He, O
2
O, O , H
2 2
Description
The measurement when the stop criteria are met is saved (one per
sample).
All the measurements are stored continuously.
2
2
2
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