Martin Audio MLA User Manual page 119

MLA System
USER GUIDE
The first stage is to place the flying grid on a flat surface, connect the reader to the sensor;-
Note that the cable length between them is immaterial, accurate readings however depend on good battery strength so if you
are calibrating a grid as part of routine maintenance it is worth replacing the battery in the reader for a new, alkaline PP3 style
9V battery. See the chapter on battery replacement for details.
As mentioned, ensure that the sensor and reader are a matched pair. If this is not possible, calibrating a replacement reader for
example, you should label them after the calibration procedure so they are always used together in future;-
With the flying grid flat, place the test inclinometer on the grid in the centre and switch on. Ideally it should show the grid at 0⁰
if the floor is flat. It is not vital that it is totally flat so don't waste time propping up the grid at either end to get a zero reading,
as long as it is close it will be fine. Now turn on the reader and check the reading. It needs to be calibrated to exactly match the
test reference. Adjustment is done using the 'ZERO' control one the right hand end of the reader;-
MLA System User Guide V2.1
119