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Figure 1-1. Type 1531 Strobotac Electronic Stroboscope showing controls and connectors
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TM-9-6625-2465-15 Electronic Stroboscope (General Radio Type 1531-AB STROBOTAC) 6680-892-1560 Manual
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AUXILIARY EQUIPMENT.


1.2.2. CONTROLS AND CONNECTORS.
All controls and connectors are conveniently located on the panel
of the instrument. See Figure 1-1 for location of controls and connectors
referred to in Table 1-1.
CONTROLS AND CONNECTORS
Ref
Name
Use
1
POWER Switch
1
Turns power on and off.
2
RPM Control
Controls flashing rate of light by rotating
fluted rim. Dial is calibrated directly in
revolutions per minute.
Range Switch
Selects any of three RPM (internal oscil -
3
Iator) ranges, plus three external -input
positions:
RPM Ranges
External Input
110-690 RPM High Intensity 700 RPM max
670-4170 RPM - Med Intensity 4000 RPM max*
4000 -25,000 Low Intensity -25,000 RPM max
CALibration
4
Indicates correct setting of Calibration
Indicator Lamp
adjustments (Ref. 5) for calibrating RPM
dial to power-line frequency.
HIGH CAL,
5
Calibration adjustments used for calibra-
LOW CAL
ting RPM dial.
6
OUTPUT TRIGGER
Trigger pulse available at this jack for
Jack
triggering Strobotac Types 1531 and 1538,
Type 1539 Stroboslave, or Type 1532 Stro -
bolume. (Refer to paragraph 2.9 and 2.10
for connection cables required.)
INPUT Jack
7
Used for connecting Stroboscope to external
synchronizing signal from electrical device
or mechanical contactor.
Reflector -Lamp
Produces and aims flashing light.
8
Assembly
Power Cord
Permanently attached six -foot power cord.
9
For storage, cord is wound clockwise around
range-switch knob and reflector; plug is
secured by sliding it onto holder pin (Ref
10),
Holder Pin
10
Secures plug-end of power cord when in-
strument is to be scored in case.
`Flashes at 3600 rpm until external signal is plugged in.
3


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