Heath Consultants Remote Methane Leak Detector (RML) - Manual (Page 20)

5. If the location with the highest pitch is consistent then the location of the leak is at
that spot.
6. If the pitches are not consistent then 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 and Calibration
The RMLD has a built-in function to perform a Self-Test and Calibration of the laser
wavelength. 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 the beginning of your survey day. Each Self-Test & Calibration
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 and Calibration, the following procedure should be performed:
1. Remove the controller from the carrying case.
2. Turn on the instrument and allow it to warm up for 2 to 3 minutes.
3. Place the transceiver in its position in the carrying case; making sure it is all the
way in place and flat.
4. Press the SELECT button until the SELF-TEST icon is shown on the display
(Note: the Retry and OK icon are also displayed).
Fig. 3-7
5. Press the UP button to initiate the self-test. The number 255 will then be
displayed.
6. When 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.
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101515-0 RMLD MANUAL REV E