Interference Calibration (Ec Sensor); Interference Calibration (Tc Sensor) - Hach Ultra ORBISPHERE 511 Quick Manual

Interference Calibration (EC Sensor)

The hydrogen interference calibration is available
for EC sensors measuring O
is required when H
enabled. The lower part of the screen displays the
actual measurement.
• Enter in the upper box the purity of the
hydrogen that is used for this calibration.
A reasonably pure (e.g. 99.8% or better)
hydrogen source and an accurate
pressure gauge are needed.
• Hold during calibration: Selected by
default, this holds the measurement
sequence to avoid storing invalid values.
Instructions
Using a flow chamber, expose the sensor to the
H source at the same barometric pressure that is
2
shown on the display. Press Start to initiate the
H interference calibration.
2
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Calibration (cont)
concentrations, and
2
interference has been
2

Interference Calibration (TC Sensor)

This calibration is available for TC sensors and is
required when one of the interferences has been
enabled. The lower part of the screen displays the
actual measurement.
• Select from the interfering gas to be
calibrated from those available, or press
the Change configuration button to
reconfigure.
• Hold during calibration: Selected by
default, this holds the measurement
sequence to avoid storing invalid values.
The following instructions refer to the different gas
interference combinations:
Instructions
For interfering oxygen on measured hydrogen or
nitrogen, expose both sensors to ambient air, or a
100% oxygen source, and press Start to initiate
the calibration.
For interfering hydrogen on measured oxygen or
nitrogen, expose both sensors to a 100%
hydrogen source and press Start to initiate the
calibration.