DeltaOHM HD31, Руководство по эксплуатации

Страница: 101 / 154

HD31
- 101 -
V1.6
• At 0 ppm with the help of nitrogen bottles. In this case, unscrew the probe filter, screw
the HD31.B3A adapter and connect the nitrogen cylinder (MINICAN.12A); adjust the
bottle flow meter to get a constant flow between 0.3 and 0.5 l/min.
Fig. 13.5.3: CO
2
calibration with nitrogen bottle
After placing the probe in clean air or connecting it to the nitrogen bottle, wait at least 15 min-
utes before proceeding with the calibration.
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. At the end of the second countdown, press F1 ( NEXT command) to save the new ca-
libration: a message 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).
During the countdown you can exit the procedure without calibrating the point by pressing ESC .
13.5.2 LINEAR GAINS
OPTION FOR
CO
2
PROBES
Three options are shown if you select LINEAR GAINS calibration option:
Fig. 13.5.4: CO
2
multi-point calibration