5520A
Operators Manual
3-10
CALIBRATION
ENABLE
SERIAL 1
FROM HOST
IEEE-488
IN OUT
/ 63 Hz 47 Hz
600VA MAX
FLUKE CORPORATION
MADE IN USA
PATENTS PENDING
NO INTERNAL USER SERVICEABLE
PARTS. REFER SERVICE TO
QUALIFIED SERVICE PERSONNEL
NORMAL
WARNING:
TO AVOID ELECTRIC SHOCK GROUNDING
CONNECTOR IN POWER CORD MUST BE CONNECTED
FUSE
CAUTION
FOR FIRE PROTECTION REPLACE ONLY
WITH A 250V FUSE OF INDICATED RATING
MAINS SUPPLY
100V/120V
220V/240V
T5.0A 250V
(SB)
T2.5A 250V
(SB)
CHASSIS
GROUND
SERIAL 2
TO UUT
10 MHz
MAX
5V
P - P
WARNING:
TO AVOID PHYSICAL INJURY, INSURE THAT THE FILTER
IS PROPERLY INSTALLED BEFORE ENERGIZING INSTRUMENT
TO CLEAN THE FILTER:
-UNPLUG INSTRUMENT
-REMOVE FILTER
-FLUSH WITH SOAPY WATER
-DRY BEFORE REINSTALLATION
INSTALLED
OPTIONS
- SC300
- SC600
1 2
7 56
8
3 4
nn012f.eps
Figure 3-2. Rear Panel View
Table 3-2. Rear Panel Features
A
The Fan Filter covers the air intake to keep dust and debris out of the chassis air baffles. The
5520A fan provides a constant cooling air flow throughout the chassis. Instructions for fan filter
maintenance are in Chapter 7, Maintenance.
B
The CALIBRATION NORMAL/ENABLE slide switch is used to write enable and disable the
nonvolatile memory that stores calibration constants. Switching to ENABLE allows changes to
be written into memory, and switching to NORMAL protects data in memory from being
overwritten. The switch is recessed to allow it to be covered with a calibration sticker to
guarantee calibration integrity.
C
The SERIAL 2 TO UUT connector is used for transmitting and receiving RS-232 serial data
between the 5520A and a Unit Under Test (UUT) or a Fluke 700 Series pressure module.
Chapter 6, “Remote Commands” describes how to use the RS-232 serial interface for UUT
communications. Chapter 4 described how to measure pressure.
D
The SERIAL 1 FROM HOST connector is used for remote control of the 5520A and for
transmitting internal-constant RS-232 serial data to a printer, monitor, or host computer.
Chapter 5, “Remote Operation” describes how to use the RS-232 serial interface for remote
control.
E
The 10 MHz IN BNC connector is for applying an optional external clock signal to the 5520A.
This replaces the normal internal 10 MHz clock signal in the 5520A. Frequency accuracy of the
5520A is governed by the frequency accuracy of the clock signal internal or external.
The 10 MHz OUT BNC connector passes the internal or external 10 MHz clock signal to another
5520A to synchronize one or more slave 5520As to a master 5520A.
F
The IEEE-488 connector is a standard parallel interface for operating the 5520A in remote
control as a Talker/Listener on the IEEE-488 bus. Refer to Chapter 5, “Remote Operation” for
bus connection and remote programming instructions.
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