Overload Protection; Operation Overview; Local Operation; Remote Operation (Rs-232) - Fluke 5502A Operator's Manual

5502A
Operators Manual

Overload Protection

The Calibrator supplies reverse-power protection, fast output disconnection, and/or fuse
protection on the output terminals for all functions.
Reverse-power protection prevents damage to the calibrator from occasional, accidental,
normal-mode, and common-mode overloads to a maximum of ±300 V peak. It is not
intended as protection against frequent (systematic and repeated) abuse. Such abuse will
cause the Calibrator to fail.
For volts, ohms, capacitance, and thermocouple functions, there is fast output
disconnection protection. This protection senses applied voltages higher than 20 volts on
the output terminals. It quickly disconnects the internal circuits from the output terminals
and resets the calibrator when such overloads occur.
For current and aux voltage functions, user replaceable fuses supply protection from
overloads applied to the Current/Aux Voltage output terminals. The fuses are accessed by
an access door on the bottom of the calibrator. You must use replacement fuses of the
same rating and type specified in this manual, or the protection supplied by the Calibrator
will be compromised.

Operation Overview

The Calibrator can be operated at the front panel or remotely with the RS-232 or IEEE-
488 ports. For remote operations, software is available to integrate 5502A operation into
a wide variety of calibration requirements.

Local Operation

Typical local operations include front-panel connections to the UUT, and then manual
keystroke entries at the front panel to put the Calibrator in the necessary output mode.
 and  make it easy to step up or down at the push of a key. You can also examine
Calibrator specifications at the push of two buttons. The backlit LCD is easy to read from
many different angles and can be read in dim or bright light. The large, easy-to-read keys
are color-coded and give tactile feedback.

Remote Operation (RS-232)

There are two rear-panel serial data RS-232 ports: SERIAL 1 FROM HOST, and
SERIAL 2 TO UUT (see Figure 1-2). Each port is dedicated to serial-data
communications to operate and control the Product during calibration procedures. For
complete information on remote operation, see Chapter 5.
The SERIAL 1 FROM HOST serial data port connects a host terminal or personal
computer (PC) to the Calibrator. To send commands to the Calibrator: enter commands
from a terminal (or a PC running a terminal program), write your own procedures with
BASIC, or use optional Windows-based software such as MET/CAL Plus.
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