Brüel & Kjær 3638 Manuel De L'utilisateur page 32

28 Exhaust Noise Inspector Type 3638 – User Manual
Setting the Sound Level Meter's Serial Number
1) In the advanced settings menu, select the sub-menu SLM Serial Number using
Press OK to start configuration.
2) Enter your sound level meter's serial number, using
digit selection. Press OK to select a specific digit and move to the next digit place.
3) Continue this procedure until all relevant digits in the serial number are entered.
4) An asterisk (*) under a serial number signifies the current sound level meter being used.
Ensure that the number displayed matches the number printed on your sound level meter.
5) To exit the advanced settings menu, press C.
Setting the RPM Tolerance Level
Type 3638 A/B has predefined RPM trigger values (the RPM value which triggers sound level
measurement), which differ for 2-wheel and 4-wheel vehicles. A 4-wheel vehicle's trigger value
is required to be at 3/4 the engine's maximum net power (see the relevant manufacturer's
specifications). A 2-wheel vehicle's trigger values are required to be at 1/2 of the engine's
maximum net power. You will determine this criteria during measurement setup (see Chapter 3).
However, difficulties in measuring RPM in the field, may make it necessary to adjust the RPM
tolerance. To do so, try the following:
1) In the advanced settings menu, select the sub-menu System Setup using
to start configuration.
2) Continue to press OK until you come to the RPM Tolerance parameter.
3) Tolerances can be up to 10% over predefined values. Use
centage amounts.
4) Press OK to confirm the desired selection. You will proceed to the next parameter. You
must go through all parameters in the System Setup sub-menu in order to exit the
advanced settings menu. Press C.
Adding Comments to a Printed Report
Three blank lines are available at the end of a printed report for the addition of manually
written comments by the test operator.
or to scroll through individual
. Press OK
to scroll through the per-
.