Heath Consultants Detecto-Pak 4 (DP) - Manual (Page 32)

CALIBRATION
100786-0 Rev. D 05/09
25
7. Attach calibration kit regulator assembly to calibration cylinder;
turn calibration cylinder valve knob counterclockwise (one-half
to one turn). DO NOT FORCE THE KNOB ALL THE WAY
COUTERCLOCKWISE (OPEN)
8. Attach calibration kit outlet connector to the portable unit by
pushing the connector firmly into the sample inlet quick connector
on the filter housing. Within 30 seconds, the meter needle should
start moving upscale. Allow another one-half minute (30 seconds)
before checking the meter.
(Figure 6)