DeltaOHM HD31, Operating Manual

Page: 102 / 154

HD31
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V1.6
• 2 POINTS : calibrates the probe at any two points.
• 3 POINTS : calibrates the probe at any three points.
• 4 POINTS : calibrates the probe at any four points.
Select the desired type of calibration using
S
and
T
, then press the F3 key ( OK command) to
confirm. The instrument displays the first calibration point ( SETPOINT line) and the CO
2
value
measured by the probe ( MEASURE line). The calibration point can be adjusted using
S
and
T
.
Fig. 13.5.5: LINEAR GAINS calibration for CO
2
probes
When the reading is stable, press F3 ( OK command) to confirm. The instrument displays a first
countdown ( Waiting ) of 60 seconds and then a second countdown ( ACQUIRING ) of 60 seconds.
During the countdown you can exit the procedure without calibrating the point by pressing ESC .
Press F1 ( NEXT command) to move to the next point. You can as well move to the next points
without calibrating the current point.
After acquiring the last point, press
F1 ( NEXT command) to save the new calibration: a mes-
sage appears reminding that the operation will change the probe calibration data, select YES
( F3 key) to continue (or press F1 to select NO and exit).
Press F2 ( BREAK command) to exit the calibration before calibrating all the points, keeping
the points already calibrated. The BREAK command is enabled only if at least one point has
been calibrated.
Note : the boxes next to the SETPOINT number represent the available calibration points; a
box becomes full when the corresponding point is calibrated.
Press
ESC to exit calibration at any time.
Reference value
Measured value