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Vibration Meter Output
to External Filter
Vibration Meter External
Filter On/Off
Ground•
External Filter
Output to Compressor
Compressor External
Filter On/Off
860728
Fig. 2. 11. External-filter DIN-socket pin connections (viewed externally)
Log. DC Output:
Voltage Input:
Charge Input:
Floating/Grounded Input:
Input Sensitivity:
18
The filters are inserted in the respective circuits when the appropriate
pin (4 for the compressor and 6 for the vibration meter, as shown in
Fig. 2.11) is connected to ground potential (pin 2 or 8). Otherwise the
filters are bypassed by the 1053. Nominal filter in/out signal voltages
are 1 V RMS and 5 V peak (max.).
When the Slave Filter Type 5888 is used, selection of the filter band-
width and the insertion or bypassing of filters is controlled from the
front panel of the 1053, using special parameters 05, 06 and 07 re-
spectively. Refer to section 7.2 for further details.
A
BNC socket providing 0 to 10V, 200mV/dB. This can be used for
supplying the vibration meter signal to the Y -axis of an X-Y or Level
Recorder. The output voltage is a logarithmic representation of the
vibration level measured by the transducer connected to the voltage-
or charge-input.
A
BNC socket for input of a voltage signal (from a conditioning ampli-
fier) to the vibration meter and compressor. The input sensitivity must
be set to 1 mV /ms-
2
or 1 mV /N. Refer to chapter 1 for specification of
the input impedance and maximum input values.
A
TNC socket for input of a charge signal (from a piezoelectric trans-
ducer) to the charge preamplifier. The charge input is suitable for di-
rect connection of BrOel
&
Kjrer force transducers
a~d
uni-gain®
accelerometers. Refer to chapter 1 for specification of the maximum
input.
A two position switch which selects either a floating input-amplifier
ground or an input-amplifier ground connected to the signal ground.
A
floating ground is used to minimize ground-loop problems. In this
case, the input-amplifier ground must be connected to the signal
ground externally, e.g. via the vibration exciter and power amplifier.
Refer to section 3.1.3 for further details.
A
seven position switch for selection of the voltage and charge sensi-
tivity of the input transducer. The sensitivity value is shown on the
front panel vibration-meter display when the Vibration Meter "Input
Sens." key is pressed.
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