Table of Contents
Advertisement
Blue
Neutral
Brown
~~P~~;er
'V
Live
[ II II II
J
Green and Yellow
Ground
172246
Fig. 3
.
1.
Mains Input socket, external view
3.3. CONNECTING THE MEASUREMENT TRANSDUCER
Connection of the Preamplifier is via a miniature 5-pin socket on the rear panel of the in-
strument. The corresponding plug has spring catches to lock it to the socket. To remove
the plug it must be held by the outer ring, which slides back when pulled, releasing the
catches and allowing the plug to be withdrawn. Pulling the rear portion of the plug, or
the cable, will not release these catches and the plug will remain locked in place.
If the length of the transducer cable is insufficient, it may be extended by using exten-
sion cable AO 0124 (3m). Fig.3.2 shows the pin connections.
+
28V (2mA)
Preamplifier
Voltage
Input Signal
(Max
.
4,5 V)
Unused
+
200V (2mA)
Polarization
Voltage
790348
Fig. 3
.
2.
Pin connections of the INPUT socket viewed looking into
the socket or from the soldering side of the corresponding
plug
3.3.1. Connecting a Microphone
A Bri..iel & Kjrer half inch microphone such as the type 41 34 screws directly to the Type
2642 Preamplifier. A one inch microphone e.g. Type 4144 requires an adaptor DB
0962 as shown in Fig.3.3.
Fig. 3. 3.
Half inch to one inch adaptor DB 0962 for mounting a one
inch microphone to the Preamplifier Type 2642
13
Advertisement
Table of Contents
