Heath Consultants Detecto Pak-Infrared (DP-I) - Manual (Page 16)

102105-0 DP-IR MANUAL REV M
Page 16 of 35
3. If the location with the fastest tick rate is consistent, then the leak is at
that spot.
4. If the tick rates are not consistent, keep working the area. The gas plume may be
drifting around causing inconsistent readings. In some cases, the gas plume may be
large enough that localization is not very accurate.
Self-Test
The DP-IR has a built-in function to perform a self-test and calibration of the instrument. The
self-test feature should be used on a daily basis to ensure that the instrument is in proper working
order.
HEATH recommends that the self-test function be performed prior to beginning your
survey day. Each self-test should be recorded into a daily log. An example daily log has been
included at the end of this manual for your convenience.
To perform the self-test, the following procedure should be followed:
1. Remove the instrument form the carrying case.
2. Turn on the instrument and allow it to warm up.
3. Verify that the battery has four or more bars.
4. Press the MENU button until the SELF-TEST icon is shown on the display (Note: the
Retry and OK icon are also displayed).
5. Press the UP button to initiate the self-test.
6. If the OK icon is displayed, the instrument passed the self-test.
a. If the RETRY icon is displayed then the instrument failed the self-test, press
the UP button to retry the self-test.
7. Press the MENU button to return to the survey run display.
If the self-test fails multiple times make sure the battery is fully charged and the instrument is
properly warmed up.
**Note**
The instrument may continue to stabilize for up to 10 to 15 minutes. Re-zero as need or re-run
self-test.
**Caution**
Should the instrument not pass after several attempts, do not use the instrument for survey work
until the problem is corrected. Contact
HEATH for further assistance.
Self-test may fail if performed shortly after reading high gas concentrations, (e.g. after bar holing
measurement) do to gas still present in the sample cell. Allow the unit to fully purge before
running a self-test.
Self-test may fail if the battery voltage is too low (below four bars).