P R E C A U T I O N S - Kenwood FL-180 Instruction Manual

27 D R I F T
Drift output terminal. The frequency drift is about DC± 1V for ± 1 % and
the output impedance is about 6 0 0 0 . The output voltage is proportional to the
speed of revolution of equipment under test.
2 8 R E C O R D E R
This terminal provides DC voltage proportional to meter reading during measu-
rement of w o w flutter. The output voltage is about 1V full scale and the output
impedance is 6 0 0 0 .
:
2 9 R E F E R E N C E F R E Q U E N C Y
This switch is used to set the frequency counter reference time for crystal
control or A C power synchronization.
50 Hz — For 50 Hz areas
6 0 Hz — For 6 0 Hz areas
C R Y S T A L — Crystal control
3 0 Voltage Nameplate
Use specified power .voltage and fuse.
1. Do not expose the F L - 1 8 0 to direct sunlight. Note that excessive temperature
rise results in unstable performance or damages transistors and IC's.
2. Avoid using the F L - 1 8 0 in locations with high temperature and humidity.
3. Use the F L - 1 8 0 in vibration-free locations. Vibration can cause misoperation.
4. A C power fluctuation should be within ± 1 0 % of the rated voltage. Power
frequency is 5 0 / 6 0 Hz.
5. Before the power is turned ON, check the mechanical zero point of the meter.
6. The F L - 1 8 0 should be used under temperatures of 0 to 4 0 ° C .
7. In measuring w o w flutter, confirm the applicable standard and condition.
8. The maximum input voltage is 100V (DC + A C peak). Do not apply a voltage in
excess of this"limit.
9. To prevent electrical shocks, be sure to connect the GND terminal (see @ on
the rear panel) to an appropriate earth point.
10. When measuring w o w flutter, the F L - 1 8 0 must be placed uprightly; otherwise,
accurate measurements cannot be obtained.
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P R E C A U T I O N S

Never connect external voltage to the output terminals.
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