Model 175A Section 11
Paragraphs 2- 1 to 2- 18
SECTION II
INSTALLATION
2-1. INCOMING INSPECTION. 2-12. The cooling fan and air filter are located at
2-2. MECHANICAL INSPECTION. the rear of the Model 175A. Leaveat least two inches
of clearance behind the instrument for the free move-
2-3. Upon receipt of your Model 175A, check the ment of air. In rack installations be sure that the
contents of the shipment against the packing list and recirculation of warm air within the rack cabinet does
inspect the instrument for any obvious damage re- not result in high ambient temperature. Inspect the
ceived in transit. See warranty sheet at the back of air filter periodically and clean it as soon as it ap-
this manual. Keep the packing material until per- pears to be reducing the flow of cooling air. See
formance check has been successfully completed. section V for cleaning instructions.
2-4. PERFORMANCE CHECK. 2-13. POWER REQUIREMENT.
2-5. Check the performance of the Model 175A by 2-14. The Model 175A operates on 115 or 230 volts
making the tests outlined in paragraph 5-5 of this *100/0, 50 to 60 cps. Power required depends upon
manual. Use this check to verify all listed specifi- the plug-ins used, but will not exceed approximately
cations and also as part of an incoming quality-control 425 watts. Before connecting the instrument to the
inspection. Instructions for the plug-in units will be power source, be sure that the 115-230 switch on the
found in the individual manuals for these instru- rear panel is in the correct position, and that the
ments. proper fuse is installed (see section VI).
2-6. INSTALLATION. CAUTION
2-7. The Model 175A is packaged in the new Hew- Connecting to a 230-volt source with the
lett-Packard cabinet, suitable for bench or rack switch in the 115-volt position can result in
mount. Top and bottom covers may be removed for damage to the instrument.
easy accessibility to internal parts and adjustments.
2-15. SAFETY POWER CABLE.
2-8. RACK MOUNTING.
2-16. To protect operating personnel the National
2-9. Parts necessary for rack mounting are pack- Electrical Manufacturers? Association (NEMA) rec-
aged with the instrument. Proceed as follows: ommends that the instrument panel and cabinet be
grounded. This instrument is equipped with a three-
a. Remove tilt stand. conductor power cable which grounds the instrument
when plugged into an appropriate outlet. The offset
b. Remove feet (press foot-release button). round pin on the power-cable three-prong connector
is the ground pin. To preserve the protection feature
c. Remove adhesive-backed trim strip from sides. when operating the instrument from a two-contact
outlet, use a three-prong to two-prong adapter and
d. Attach filler strip along bottom edge of front connect the green pigtail on the adapter to ground.
panel.
e. Attach mounting flanges to sides with larger 2-17. REPACKAGING FOR SHIPMENT.
notch toward bottom of instrument.
2-18. To repack the Model 175A for shipment, always
f. Mount in standard 19-inch rack (mounting screws use the best packaging methods available. If the
not supplied). original container with its packing pads and fillers
is not on hand, consult your nearest Hewlett-Packard
Note sales office for packing materials or instructions.
The following steps are a general guide:
Rear support must be supplied to the rack-
mounted instrument if it is to be subjected a. Wrap the instrument in heavy paper.
to mechanical vibrations.
b. Protect the panel with cardboard strips.
2-10. COOLING.
2-11. The air filter in this instrument must receive c. Use a strong cardboard or wooden box.
an oil coat before the instrument is placed in normal
use to prevent excessive dirt from entering instrument d. Use ample packing material around all sides of
case. Recommended is Research Products Company the instrument.
No. 3 Filter Coat. This adhesive is available in e. Seal with heavy tape or metal bands.
?Handi-Koter? sprayer cans at most heating-supply
stores or through your Hewlett-Packard field sales f. Mark the container ?Fragile - Delicate Instru-
engineer. ment?.
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ACEC
