HP 3335A - System Operation and Environment; HP-IB System Description; Operating Environment and Cooling; Installation for Bench or Rack Mounting

Mode! 3335A
designated (5... 1)which are used to select the listen
address. Instructions for changing the listen address are
provided in Section III of this manual along with 3335A
programming codes.
2-17. HP-IB Descriptions.
2-18. A description of the HP-IB is provided in Section IH
of this manual. A study of this information is necessary if
you are not familiar with the HP-IB concept. Additional
information concerning the design criteria and operation of
the bus is available in IEEE Standard 488-1975 titled
“IEEE Standard Digital Interface for Programmable Instru-
mentation”.
2-19, OPERATING ENVIRONMENT.
WARNING §
To prevent potential electrical or fire hazard,
do not expose equipment to rain or moisture.
2-20. Operating and Storage Temperature.
2-21. In order for the 3335A to meet the specifications
listed in Table 1-1, the operating environment must be
within the following limits:
Temperature. 4.4 eae ed es 0 to + 55°C
Humidity. aaau oe cee eae oo < 85% relative
Altitude., wo we Sodreth aes ltacs < 15,000 feet
2-22. Cooling System.
2-23. A forced air cooling system is used to maintain the
operating temperature required by the instrument. The
cooling fan is located on the right side of the instrument
drawing air through the filtered side panel. When operating
the instrument, choose a location that provides at least
three inches of clearance at the rear and at least one inch
for each side. Failure to provide adequate air clearance will
result in excessive internal temperature reducing instrument
reliability. The clearances provided by the plastic feet in
bench stacking and the filler strip in rack mounting allow
air passage across the top and bottom cabinet surfaces.
NOTE
Rack Mount side slide assemblies cannot be
used with the 3335A. These assemblies block
air passage to the fan and will cause overheat-
ing.
2-24. Thermal Cuteut Switch.
2-25. The 3335A is equipped with a thermal cutout switch
which automatically removes line voltage when the internal
temperature becomes excessive. The switch resets auto-
Section I]
matically when the instrument cools. If a thermal cutout
occurs, check for an inoperative fan, clogged fan parts or
filter and other conditions that could obstruct air flow. To
clean the fan filter, the side panel/filter assembly must be
removed. Flush the filter with soapy water, rinse clean and
air dry.
2-26, Bench Operation.
2-27. The instrument has plastic feet attached to the
bottom panel. The front feet contain foldaway tilt stands
for convenience in bench operation. The tilt stand raises the
front of the instrument for easier viewing of the control
panel. The plastic feet are shaped to make full-width modu-
lar instruments self-align when they are stacked. A front
handle kit, -hp- Part No. 5060-9899 (Option 907), can be
installed for ease of handling the instrument on the bench
(see Figure 2-3). The kit is shipped with the instrument if
Option 907 is also ordered. Otherwise, the front handle kit
is available separately by its -hp- part number.
2-28. Rack Mounting.
2-29, The 3335A can be rack mounted in a rack having an
EIA standard width of 482.6 mm (19 inches). The instru-
a TRIM
HANDLE KIT, BENCH OPERATION
bee sA
OPTION 908
RACK MOUNT FLANGE/FRONT HANDLE KIT
Figure 2-3. Rack Mount and Handle Kits.
2-3