Heath Consultants Detecto Pak-Infrared (DP-I) - Manual (Page 21)

102105-0 DP-IR MANUAL REV M
Page 21 of 35
CHAPTER V
Surveying with the DP-IR
**Note**
Refer to your company’s specific leak survey training and procedures for being qualified and for
specific instrument use instructions.
**Warning**
Do not submerge the probe in water. Severe damage may result.
**Note**
The internal pump will always be running. Should there be insufficient flow through the
instrument the FLOW ERROR icon will show and the alarm will sound. To test that the pump is
working, plug the inlet with your finger, this will cause a FLOW ERROR and alarm. If there is
no FLOW ERROR and alarm, the pump is not working properly.
**Note**
There is always a small amount of methane in the air. This natural methane background is
also measured by the DP-IR. The DP-IR is very capable of measuring slight changes in the
environmental conditions.
**Note**
When moving the DP-IR from a cold environment to a hot and humid environment quickly,
condensation may form on the optics. If this happens, the instrument must remain running for
several minutes in order to exhaust this condensation.
Surveying with the DP-IR is similar to surveying with previous generation FI instruments. To
survey with the DP-IR, follow these basic rules:
1. Replace the dust filter at least daily. Severe dusty to wet conditions may require
replacement of the filter more often.
2. Recharge the battery after each use to ensure full battery charge for the next day.
3. Perform the self-test at least at the start of the survey day.
4. Perform flow-test by blocking the inlet and confirming that it causes FLOW ERROR
alarm. Perform this test at least at the start of the survey day and throughout the
day if needed.
5. Verify that the alarm level is set correctly.
6. Verify that the flow alarm and pump are working correctly.
7. Zero the instrument as needed during the survey due to environmental changes.