Hioki ST5540, Instruction Manual, Page: 250 / 326

8.9 Troubleshooting
244
When the HiTESTER is malfunctioning, attempt checking and troubleshooting according to the instruc-
tions shown below.
8.9 Troubleshooting
Symptom Cause / Treatment
The RS-232C/ USB has
stopped working completely. • Are the cables properly connected?
• Are all the devices powered on?
• Are correct cables used?
• Has the communication condition been correctly set?
Communication failure with
RS-232C/USB • Does the RS-232C have the same settings (baud rate, data length, parity,
stop bit)?
See "Message Terminators" (p. 148)
After transmission on the RS-
232C/ USB bus, the keys on
the HITESTER freeze up and
have no effect. • Press the LOCAL key on the front panel of the HiTESTER to release the
remote state.
When attempting to read data
using a BASIC INPUT state-
ment, the RS-232C bus hangs. • Be sure to transmit one query before each INPUT statement.
• Have any of these transmitted queries resulted in as error?
The RS-232C/ USB has
stopped working completely.
• Using the *ESR? query, inspect the standard event status register, and
check what type of error has occurred.
Sending several queries, pro-
duces only one response. • Has an error occurred?
• Send the queries one at a time, and read the responses individually. When
you want to read them in all at once, try doing so by putting them all on one
line separated by the message separator character
The response message to a
query differs from the display
on the front panel. • Due to the response message being produced at the instant that the HiT-
ESTER receives the query, there is a possibility that it may not agree with
the display at the instant that the controller reads it in.