Model 185B Section II
Paragraphs 2-1 to 2-19
SECTION II
PREPARATION FOR USE
2-1. INCOMING INSPLCTION. FREE RUN, TIME SCALE MAGNIFIER and CALI-
BRATOR AND SYNC PULSE OUTPUT switches full
2-2. MECHANICAL INSPECTION. counterclockwise.
2-3. Upon receipt of your Model 185B, check the
contents against the packing list and inspect the in- d. Center HORIZONTAL POSITION and VERTICAL
strument for any obvious damage received in transit. POSITION controls.
If damage is evident, file claim with the carrier. e. Turn the Model 185B on and allow about two
(Refer to the warranty sheet in this manual for ad- minutes for the instrument to stabilize. Connect the
ditional information.) To facilitate reshipment, keep vertical plug-in input to the 50-mc connector.
all re-usable packing material until an operational
check has been successfully completed. f. Rotate INTENSITY clockwise until a trace ap-
pears. If the crt remains blank, press BEAM FINDER
2-4. POWER REQUIREMENTS. and readjust HORIZONTAL POSITION and VERTICAL
2-5. The Model 185B requires a power source of POSITION controls as necessary.
115 or 230 volts *lo%, single phase, 50 to 60 cps, g. Adjust FOCUS for a thin, well-defined trace.
which can deliver approximately 300 watts.
2-6. 230-VOLT OPERATION. h The resultant presentation should be approxi-
mately five cycles of a 50-mc sine wave.
2-7. If .230-volt operation is desired, a screwdriver- 2-12. INSTALLATION.
operated switch is provided on the rear of the instru-
ment. The existing fuse should be replaced with a 2-13. COOLING.
2-ampere slow-blow fuse.
2-14. The Model 185B uses a forced-air cooling sys-
tem to maintain tolerable operating temperatures
CAUTION within the cabinet. The air intake and filter are lo-
Be sure to set the 115-230 volt switch prop- cated on rear of instrument. When mounting instru-
erly for the line voltage to be used. The ment, choose a site that provides at least three inches
power supplies may be damaged if this of clearance around rear and sides of cabinet..
switch is set to the wrong position.
2-15. AIR FILTER. Before operating the Model 185B,
the air filter, located at rear of instrument, should
2-8. THREE-CONDUCTOR POWER CABLE, be coated with a filter adhesive such as Filter Coat
2-9. To protect operating personnel, the National No. 3 from Research Products Co. In addition, the
Electrical Manufacturers' Association (NEMA) rec- filter should be cleaned periodically to insure proper
ommends that the instrument panel and cabinet be cooling. Refer to paragraph 5-6 for proper cleaning
grounded. This instrument is equipped with a three- procedures.
conductor power cable which, when plugged into an
appropriate receptacle, grounds the instrument. The 2-16. CABINET MOUNT.
offset pin on the power cable three-prong connector
2-17. The Model 185B cabinet mount is a portable
is the ground pin. To preserve the protection feature instrument. The instrument is intended to be oper-
when operating the instrument from a two-contact ated with its front panel in a verticalor near-vertical
outlet, use a three-prong to two-prong adapter and
connect the green pigtail to ground. plane. A bail is provided for raising front of instru-
ment to a better viewing angle. Be sure to maintain
clearance required for proper cooling mentioned in
2-10. OPERATIONAL CHECK. paragraph 2-14.
2-11. The following procedure is given as a means 2-18. RACK MOUNT.
for checking basic operation of the Model 185B. All
controls mentioned in the following procedure are 2-19. The standard rack model is supplied with two
shown in figure 3-1. A complete check-out procedure rear-support pins and bushings. The bushings are
to verify specifications is given in paragraph 5-67. installed on rear flanges. The pins are for use in
mounting the instrument at installation and are in-
a. Install the vertical plug-in unit. Set vertical tended to mate with bushings when instrument is in-
gain to approximately 50 mv/cm. stalled. Do not mount the instrument with only front-
panel screws, particularly if installation is subject
b. Turn INTENSITY full counterclockwise. to any vibration or shock. Location dimensions for
support pins are shown in figure 2-2. Screws for
c. Set SCANNING to INTERNAL, TIME SCALE to securing front panel to rack are not supplied. Install
100 NSEC/CM, DENSITY full clockwise, MODE to instrument as follows:
01255-1 2- 1 |
ACEC
HEWLETT-PACKARD
