G.R.A.S. Sound & Vibration
Sound-intensity Probe Type 50AI - Page 8
Type 50AI version C
Can be connected directly to any analyser with two standard 7-pin LEMO microphone-preampli-
fier inputs.
Can be used with the following G.R.A.S. Power Modules, which provide all necessary voltages
for powering the preamplifiers:
• Intensity Module Type 12AB (see description above under version B)
• Power Module Type 12AA
(via the included adapter cable AC0003, which splits the output from a 12-pin LEMO socket
into two 7-pin LEMO plugs)
The Power Module Type 12AA (which is battery-operated) has two standard BNC output sock-
ets for connecting to analysers that don’t have special microphone-preamplifier inputs.
Type 50AI version D
Similar to version B but uses an internal 9-V battery (already fitted on delivery) for enabling its
remote-control functions. Fig 1.7 shows how to gain access to the battery.
Type 50AI version HP
Has built-in remote-control functions for direct connection to, and control of, Hewlett-Packard
analysers such as the types HP 3569A and HP 35670A Opt UK4.
Both of these analysers will support the LEDs marked
OVERLOAD
and
MEASURING
as well as
the control button marked
START/GATE
.
Type 50AI version LD
Has built-in remote control functions for direct use and control of Larson Davis analysers such
as the types LD2900 and LD3000.
Fig. 1.7 Access to the 9 -V battery located inside the remote-control handle of the
Type 50AI version D. The battery should be disconnected / reconnected
while
inside
the
remote-control
handle
Unscrew and
remove
Slide cover
back
