KEPCO MST 488 Programmer - Manual (Page 3)

SECTION 3, OPERATION, add the following:
NOTE:
The VISA query function (included in the latest versions of the VISA libraries) is not supported
by the MST 488-27. In newer XP and Vista computers a delay is needed to insure the MST 488-
27 has time to return the response to the query. The VISA query has no provisions to add a
delay, nor can it issue a series of read strobes between sending the request and receiving data
from the device. Instead of the VISA query, use one of the two methods described below.
Method 2 is recommended.
1. Use a VISA Write followed by VISA Read with a small delay between the functions. The
delay is determined by computer speed. A 2 millisecond delay between the Write and Read
functions will be sufficient to insure that there is enough time to receive a response for all valid
queries.
2. Follow the VISA Write with a series of VISA Read strobes while waiting for the data available
bit to be true, followed by the VISA Read function when data is available. This method provides
the highest throughput.
KEPCO
®
THE POWER SUPPLIER™
INSTRUCTION MANUAL CORRECTION
KEPCO MODEL MST 488-27
MST488-27/080307
KEPCO, INC. ! 131-38 SANFORD AVENUE ! FLUSHING, NY. 11355 U.S.A. ! TEL (718) 461-7000 ! FAX (718) 767-1102
email: [email protected] ! World Wide Web: http://www.kepcopower.com