Dynatron AG OxySpy - Calibration

Calibration
11
The calibration can be made either in air
(20.9%
O
2
) or pure oxygen (100% O
2
). The Oxy-
Spy will automatically detect which gas is being
used for calibration.
The
O
2
sensor measures the partial pressure of
the oxygen and the OxySpy calculates the
O
2
percentage (
O
2
%) from it. Changes of the
ambient pressure or temperature will influence
the O
2
measurement values. This is the reason
why the OxySpy has to be calibrated frequently.
Once the
O
2
sensor has been calibrated, the
maximum allowed partial pressure of oxygen
(pp O
2
limit) can be set. This value is needed by
the OxySpy to calculate the maximum operation
depth (MOD).
A new calibration is required when:
• The measured
O
2
percentage in the air is
below 20.7% O
2
.
• The measured
O
2
percentage in the air
exceeds 21.1% O
2
.
• The CAL symbol is displayed.
• If you are unsure about the displayed
O
2
per-
centage.
The
O
2
percentage of the gas mixture (used for
the calibration) must not change during the cali-
bration.
The duration of an OxySpy calibration is a maxi-
mum of 30 seconds.
The calibration can be interrupted at any time by
pressing the button.
In hot or humid climates, the OxySpy should be
calibrated either in pure oxygen (100%) or in
compressed air from a tank.
What you
have to
know
about
calibration
English