Name of Control
Function
Index
Ref Desig.
or Indicator
13
Power On Indicator
I-1
Indicates power is being supplied to the unit.
Light
CHANNEL Selector
S1
Used to switch the desired vibration transducer
14
Switch
into the input network. This switch also con-
nects the appropriate SENSITIVITY control to
the adjustable gain amplifier for the selected
channel.
S3
Used to switch the appropriate filter into the
15
INPUT NETWORK
circuit. The OUT position is used to connect
Selector Switch
the unfiltered vibration transducer signal
directly to the attenuator and adjustable gain
amplifier. The 70 position connects the 70 cps
filter into the system, and the 200 position
connects the 200 cps filter into the system.
M1
This meter indicates the average velocity in
16
Indicating Meter
inches per second, or tens of degrees per
second. It also indicates peak-to-peak dis-
placement of vibratory motion in thousandths
of an inch (roils), or hundredths of a degree.
Values are read from the upper or lower scale,
depending on the setting of the RANGE selector
switch. Either average velocity or peak-to-
peak displacement is indicated, depending on
the setting of the OPERATION selector switch.
The complete applicable scale factor is the
product of both the RANGE and OPERATION
selector switch settings.
Functions of Operating Controls and Indicators (Sheet 2 of 2)
Figure 1-20.
Ref.
Function
Desig.
Index
Name of Connector
SCOPE Connector
J7
A telephone type jack used for connecting an oscilloscope to the
3
output of the vibration meter for making a visual inspection of
the signals. This connector may also be used for connecting
warning circuits which are of sufficiently high input impedance.
NOTE
The oscilloscope used with the vibration meter must
have an input impedance of 0.5 megohm or more to
avoid loading the meter circuit.
Used to connect the channel 4 vibration transducer to the vibra-
18
CHANNEL 4 Connector
J4
tion meter.
Function of Electrical Connectors (Sheet 1 of 2)
