Model 90 Quantifier Sound Level Meter
Page 42
Key Press
Display
Comments
The Ln to be changed can be
selected using the Up and Down
arrow keys.
Press OK to select the Ln to
change.
In this example, the Ln1 has been
selected.
Use the Up and Down arrow keys
to change the value and the Left
and Right arrow keys to move
between the numbers.
Press OK to accept the changes or
Exit to discard any changes.
The other Ln values can be altered in the same manner as shown above.
User Metric
The additional measurement parameter provided the MODEL 90 instrument is known as
the User Metric. This measurement parameter can be selected to be either L
E
(Sound
Exposure Level, SEL), L
Ieq,t
(Impulse Weighted Time Weighted Sound Level) or L
AFTeq
(Takt Maximal Sound Level).
Key Press
Display
Comments
Select the required User Metric
and press OK to select.
The select User Metric is indicated
by a tick.
Press Exit to return to the main
display.
