Instruction manual

5
Mounting Considerations
The DORROUGH Loudness Monitor is available with or without a case, and
is manufactured in several versions to accommodate differing customer
needs. For example, "A" Type models are the standard Loudness Monitors,
while "B" Type models measure Relative Loudness to Peak Modulation (see
front cover).
Fig. 3 and Fig. 4 show the physical specifications for mounting one or two
meters with their cases in a rack panel. Fig. 5 shows the physical mounting
specifications for each panel mount model (no case), while Fig. 6 illustrates
the procedure for installing a panel mount meter.
19.00 "
3.50 "
8.125 "
PANEL #40A-S
LOUDNESS MONITOR
MODEL 40-A
-25
-22
-20
-18
-16
-14
-12
-10
- 8
- 6
- 4
- 2
0
+ 2
+ 4
+ 6
+ 8
+10
+12
+14
NORMAL
PEAK
RANGE
NORMAL
RANGE
PERSIS
TENCE
dB
dB
16.250 "
6.50 "
3.00 "
PANEL #40A-D
LOUDNESS MONITOR
MODEL 40-A
-25
-22
-20
-18
-16
-14
-12
-10
- 8
- 6
- 4
- 2
0
+ 2
+ 4
+ 6
+ 8
+10
+12
+14
NORMAL
PEAK
RANGE
NORMAL
RANGE
PERSIS
TENCE
dB
dB
LOUDNESS MONITOR
MODEL 40-A
-25
-22
-20
-18
-16
-14
-12
-10
- 8
- 6
- 4
- 2
0
+ 2
+ 4
+ 6
+ 8
+10
+12
+14
NORMAL
PEAK
RANGE
NORMAL
RANGE
PERSIS
TENCE
dB
dB
Fig. 3. Physical specifications for mounting a single meter in a rack panel.
As an installation aid, an optional rack panel (40A-S) is available from the
factory. Meter slides in from the back and is fastened to the tray with two
4-40 x 3/4" screws.
Fig. 4. Physical specifications for mounting two meters in a standard rack
panel. As an installation aid, an optional rack panel (40A-D) is available from
the factory. Meter slides in from the back and is fastened to the tray with
four 4-40 x 3/4" screws.