10
6. Preparation for measurement
6-1 Measurement flow
Measurement condition
not established.
Measurement condition
not established.
System calibration
Set microphone
Install tachometer sensor
Install tachometer monitor
Select revolution speed /engine
Measure background noise
1
st
measurement
2
nd
measurement
Print sound value
Finish measurement
Engine start
3
rd
measurement
Engine stop
Measurement
method A
Engine stop
Engine start
Measurement condition
not established.
①
Turn ON the power switch. “Function” LED will be lit and then turned off
after 3 seconds.
②
Press calibration switch.
③
Confirm the noise level monitor is 94 dB.
If not, remove the cover of the sound volume meter and refer to page 14
of the instruction manual for the sound volume meter.
④
Confirm that the revolution speed monitor is 2000 rpm.
If not, refer to page 22.
⑤
By pressing print switch, calibration result will be printed with the date
and time.
①
Using the gauge of the microphone stand, adjust the position at 50 cm
from the exhaust pipe opening and 45 degrees outside of exhaust gas
flow direction.
①
When using the AVL sensor, press “AVL” switch (LED will be lit.)
Attach the AVL sensor at a suitable position. (AVL sensor can be used
for diesel engine as well.)
②
When using the pulse sensor, insert it into the high voltage cable for the
spark plug.
①
Set the external monitor where it is easy to see from the driver
(Setting not necessary when not used.)
①
Adjust the revolution speed by revolution speed setting (select by the
function switch).
②
Select engine type (select by the function switch.)
2 cycle, 4 cycle, diesel, etc.
①
Press “Background noise” switch (LED will blink.).
②
After 10 seconds, background noise will be measured and automatically
go to 1
st
measurement mode.
①
1
st
“Measurement 1” LED will be lit. (Will be lit when the 1str
measurement is standby.)
②
Increase gradually the engine revolution speed by the accelerator and
LED “4” of the tachometer monitor will be lit.
③
“Measurement 1” LED will blink when the measurement condition is not
established.
→
Release the accelerator
④
Go to 2
nd
measurement mode.
①
2
nd
“Measurement 2” LED will be lit. Hereafter same as the 1
st
measurement.
②
In the case of measurement method A, sound value will be
automatically printed.
In the case of measurement method B, go to 3
rd
measurement
mode.
①
In the case of measurement method B, 3
rd
“Measurement 3” LED
will be lit. Hereafter same as the 1
st
measurement.
①
Hereafter same as the 1
st
measurement.
Measurement is automatically performed with the following operations
/
displays.
