Model 297A Section I
Paragraphs 1-1 to 1-9
I ?-
SECTION I
GENERAL INFORMATION
1-1. GENERAL DESCRIPTION. height. The Model 297A is supplied with two flexible
couplers so that it may be used with either ($9 Model
1-2. The Model 297A, formerly called the Model
AC-97C, is a two-speed motor driven unit designed 302A or 31QA.
to sweep oscillators and other tunable devices through
1-5. INSTRUMENT IDENTIFICATION.
their ranges automatically. The Model 297A reverses
automatically when it reaches a preset clockwise or 1-6. Hewlett-Packard uses a two-section eight-digit
counterclockwise limit. The limits can be set for a serial number (000-00000). If- the first three digits
very narrow or broad range. The Model 297A has of the serial number on your instrument do not agree
two speeds: HIGH SPEED gives an output shaft rota- with those on the title. page of this manual, change
tion of 10 rpm, LOW SPEED gives an output shaft sheets supplied with the manual will define differences
speed of 1.0 rpm. An output voltage, useful for between your instrument and the Model 297A described
driving x-y recorders, oscilloscopes, or other de- in this manual.
vices, is supplied to output terminals. The output
voltage is proportional to output shaft rotation. Figure 1-7. POWER CABLE.
1-1 illustrates the Model 297A, with brackets for
mounting on the Model 302A. 1-8. For the protection of operating personnel, the
National Electrical Manufacturers? Association
(NEMA) recommends that the instrument panel and
cabinet be grounded. This instrument is equipped with
1-3. USES. a three-conductor power cable which, when plugged
1-4. The Model 297A was designed primarily for use into an appropriate receptacle, grounds the instrument.
with the @ Model 302A Wave Analyzer andis supplied The offset pin on the power cable three-prong connector
with necessary hardware to mount on the Model 302A. is the ground pin.
The Model 297A can be used with other devices that do
not require excessive torque. For applications other 1-9. To preserve the protection feature when opera-
than with the Model 302A, the Model 297Ais available ting the instrument from a two-contact outlet, use a
with a bench stand. When the benchstand is used; the three-prong to two-prong adapter and connect the
Model 297A can be adjusted between 4 and 12 inches in green pigtail on the adapter to ground.
Table 1-1. Specifications
SWEEP RANGE: 64 revolutions (see Sweep Voltage STARTING AND RUNNING TORQUE: 9 oz-in at
Output specifications). 10 rpm. Friction clutch limits torque at 1 rpm
to approximately 12 oz-in.
SWEEP LIMITS: Any interval from 64 revolutions
to 10 degrees. MOTOR: Reversible synchronous capacitor type
reluctance motor; may be stalled indefinitely.
SWEEP SPEED WITH @ 302A: 170 cps persecond
and 17 cps per second. OUTPUT SHAFT: 1/4 inch diameter with 7/16
coupler inch for ($9 Model 302A.
SHAFT SPEED: 10 rpm, 1 rpm, and neutra1;quick
change speed transfer without stopping. Neutral POWER: 115 volts lo%, 50 to 60 cps, 12 watts,
permits manual operation. running or stalled.
SWEEP OUTPUT: 15 volts maximum. Change of MOUNT: Mounts on front panel of ($9 Model 302A.
output proportional to change in shaft position
and zero output may be set for any shaft posi- DIMENSIONS:? 3-1/2 inches high, 7 inches wide,
tion. Full output may be obtained with either 5-1/4 inches deep, shaft extends 13/16 inch
2.1 revolutions or with 50 revolutions of the behind case.
output shaft. When shaft speed control is in
High Speed, sweep output control cannot be set ACCESSORIES AVAILABLE: Bench stand(ll505A)
to Short Sweep. Adjust shaft height from 4 to 12 inches.
01163-2 1-1 |
ACEC
