Measurement mode Auto-V 7 Special functions of the DMS Go+ TC
DMS Go+ Edition 4 (05/2014) 7-7
Zeroing for Auto-V
The calibration described below is an abso-
lute prerequisite for the subsequent mea-
surements.
Checking reference block data
A special velocity reference block made of copper be-
longs to every DMS Go+ TC. The data of this reference
block are usually already stored in your DMS Go+ TC.
At first, check that these data (sound velocity and serial
number) correspond to those of the reference block. If
necessary, you can enter new data, e.g. if the original
reference block has been lost (
see Chapter Saving cal-
ibration block data, page 5-48).
The sound velocity (V) in inch/µs and m/s, and the serial
number (S/N) are engraved on two sides of the refer
-
ence block.
Carrying out probe zero offset
It is absolutely necessary that you use low-
viscosity couplant for the probe zero offset
(e.g. light machinery oil or glycerin).
Before starting the calibration, set an initial
sound velocity between 5000 and 6000
m/s
in order to reduce the calibration time.
– In the function group PROBE&CAL, select the func-
tion TG MODE.
– Choose the option AUTO-V.
– In the function group PROBE&CAL, select the func-
tion VELOCITY.
– Set a value between 5000 and 6000 m/s.
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