Symptom
Possible Cause
Explanation/Corrective Action
During normal
operation the loads
red “SYS”, “TEMP”
and “AC” LEDs light.
One or more power modules in
the power tray are overheating.
Check that there is nothing
blocking the airflow through the
unit.
One of the loads cooling fans
may be defective.
Send the unit in for service.
Load is set in the
constant current mode,
constant power mode
or the constant
resistance mode, and
the expected current
differs from the actual
current.
An audible sound may
also be heard.
System (includes the load,
power source, metering, etc.)
may be oscillating.
Prolonged use of the load while
the system is oscillating may
cause damage to the load.
To check for oscillation, connect
an oscilloscope to the “CS”
(current sample) with respect to
the S– on the rear terminal strip.
Oscillation is usually caused by
the inductance of the cabling
between the DC source and the
load. This cabling should be as
short as possible and the positive
and negative wires should be
twisted, to reduce the cable
inductance. Also connecting a
capacitor across the loads inputs
can squelch the oscillation.
Load does not
communicate over the
IEEE bus.
IEEE address of the load is not
matched with the computer
program being used to
communicate.
Change the IEEE address using
menu item 14 to match the
computer program being used.
IEEE interconnect cable maybe
loose or defective
Tighten or replace the cable.
Load communicates
commands over the
IEEE bus but not
queries.
The terminator in the load may
not be matched to the
terminator of the computer
program being used.
Change the terminator in the load,
“CR” (carriage return) or “CR-LF”
(carriage return, line feed) using
the menu item 15 to match the
computer program being used.
Load does not
communicate over the
RS 232 bus
Computer program used to run
the RS 232 is not properly set
up.
The computer program should be
set to 9600 Baud N8+1 (8 Bit, 1
Stop Bit, no parity).
RS 232 interconnect cable may
be loose or defective.
Tighten or replace the cable.
For Customer Service and Repairs contact
Telephone: (908) 850-5088 Facsimile: (908) 850-0679
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Содержание XBL 400
Страница 61: ...CR See query form of CRH and CRL that immediately follows XBL Series 404078 Rev P2 odt Page 61 Of 162 ...
Страница 94: ...MDL Alternate form of ID query Page 94 Of 162 ...
Страница 108: ...RNGS Alternate form of RNG Query Page 108 Of 162 ...
Страница 120: ...SN Alternate form of SERNO query Page 120 Of 162 ...
Страница 160: ...Page 160 Of 162 ...