G.R.A.S. Sound & Vibration
Single-channel Low-noise Measuring System consisting of: Type 40HT and Type 12HF - Page 9
•
7-pin LEMO EGA 307 1B input socket for the LEMO plug on the cable of the Gain and
Filter Unit Type 26HT. Wiring diagram shown in Fig. 2.2.
•
BNC output socket for the selected (
Pressure
/
Free Field
) output signal.
2.2
Rear Panel
The rear panel has the following features (see Fig. 2.3)
•
Twist/release holder for 315 mA fast-blow fuse.
•
Input socket for an external voltage supply of 6 V - 20 V DC; centre pin +terminal. Use the
Mains/line Adapter AB0010 supplied with the Type 12HF.
•
Locking screw
Unscrew to remove base plate and gain access to the battery pack (see section 2.3).
Fig. 2.2 7-pin LEMO EGA 307 1B input socket
(external view)
Fig. 2.3 Rear panel of the Power Module Type 12HF
Input for external
Power Supply
6 V - 20 VDC
Fuse 315 mA fast
blow
Locking screw for
base plate
