Fluke 5522A Operators, Руководство оператора

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5-3
Introduction
This chapter describes methods for operating the Calibrator by remote control.

Warning
The 5522A Calibrator can produce voltages up to 1020 V rms
and must be programmed with caution to prevent hazardous
voltages from being produced without sufficient warning to the
operator.
Write programs carefully and test them extensively to ensure
safe operation of the Calibrator. Fluke suggests that you
include error-catching routines in your programs. These error-
catching routines will help you identify programming errors that
may cause the Calibrator to behave other than intended. You
can program the Calibrator to cause an SRQ when an error is
detected by setting the Service Request Enable (SRQ) register.
The following skeleton program includes error-catching code:
10 PRINT @4,
“
*CLS
”
! Clear status
20 PRINT @4,
“
*SRE 8
”
! Set SRE Error Available
30 ON SRQ GOTO 1000 ! Enable SRQ Function
100 ! Place body of program here
900
STOP ! End of program
1000 REM Start of SRQ Handler
! Start routine
1010 PRINT @4,
“
FAULT?
”
! Request fault code
1020 INPUT @4, A% ! Input fault code
1030 PRINT @4,
“
EXPLAIN?
“
;A% ! Request fault text
1040 INPUT @4, A$ ! Input fault text
1050 PRINT
“
Fault
“
;A$
”
detected
”
! Print message
1060 PRINT @4,
“
STBY
”
! Place 5522A in standby
1070 STOP
Remote control can be interactive, with the user controlling each step from a terminal, or
under the control of a computer program running the Calibrator in an automated system.
The Calibrator rear panel has three ports for remote operations: IEEE-488 parallel port
(also known as a General Purpose Interface Bus, or GPIB port), and two RS-232 serial
ports, SERIAL 1 FROM HOST and SERIAL 2 TO UUT.
IEEE-488 The IEEE-488 parallel port is usually used in larger control and calibration
systems. An IEEE-488 system is more costly to set up, but has the ability to serve
multiple Calibrators and multiple UUTs. Also, parallel system throughput is faster than
serial system throughput. The controller in an IEEE-488 system is typically a MS-DOS
compatible personal computer (PC) equipped with one or more IEEE-488 ports. You can
write your own computer programs for system operation using the command set, or you
can purchase optional Fluke calibration software MET/CAL or 5500/CAL, and property
management software MET/TRACK. Typical IEEE-488 configurations are shown in
Figure 5-1. The configuration showing the PC with two IEEE-488 ports is used with
MET/CAL, which prefers UUTs on a separate IEEE-488 port. You can also “piggy-back”
the connectors on a single IEEE-488 port.