Non-Volatile Memory Storage (L); Data Format (G) - Keithley 617 Instruction Manual

justing a number of potentiometers, the user need only apply
an appropriate calibration signal and send the calibration
value over the bus. The calibration command may take on
either of the following forms:
Ann.nnn
An.nnnnE+n
Thus, the following two commands would be equivalent:
Al9
A1.9E+l
In this example, the nominal value for the 20V range is being
used. Note that only as many significant digits as necessary
need be sent. In this case, the exact calibration point is as-
sumed to be 19.000 even though only the first two digits were
actually sent.
If the calibration value is outside the allowed range (? 6% of
nominal value), a number error will occur, as indicated by
the following message:
n Err
Once all functions and ranges have been calibrated, perma-
nent storage of calibration parameters must be performed, as
described in paragraph 3.10.12.
NOTE
The proper calibration signal must be connected
to the instrument before attempting calibration.
See Section 7 for complete details on calibrating
the instrument either from the front panel or
over the bus.
HP85 Programming Example-The
following statements
can be used to calibrate the instrument on the 2oOV range:
REMOTE 727 (END LINE)
OUTPUT 727;"A190X" (END LINE)
When the second statement is executed, calibration of the
2OOV range is performed, assuming that the correct calibra-
tion value is applied to the instrument.
Model 8573 Programming Example-Use the following
statements to send the 2COV range calibration value to the in-
strument:
V%=l:CALL IBSRE(BRDO%,V%) (return)
CMD$="AlQOX":CALL IBWRT(M617%,CMD$) (return)
Through the use of the G command, the format of the data
the instrument sends over the bus may be controlled as
foIlows:
GO= Send reading with prefix. Example:NDCV-1.23456E
+OO
The calibration value is sent to the instrument when the
second statement is executed.
3.10.12 Non-Volatile Memory Storage IL)
The Model 617 uses non-volatile (NV) RAM to store calibra-
tion parameters. Once the instrument has been calibrated, as
described in the last p&graph, the NVRAM storage com-
mand should be sent to permanently store these parameters.
This procedure is performed by sending the following se-
quence: LlX. NVRAM storage will take place when the in-
strument receives this command over the bus. Note that
NVRAM storage may be disabled by changing the position of
a calibration jumper, as described in Section 7. If the jumper
is in the enabled position, all calibration must be properly
done, or calibration of all functions and ranges will be af-
fected.
NOTE
Do not perform the following programming ex-
am&s unless actual NVRAM storaee is desired.
Uniess proper calibrating para&te;s have~been
previously programmed, inadvertent use of this
command could affect instrument accuracy.
HP-85 Programming Example-Use the following
statements to perform NVRAM storage:
REMOTE 727 (END LINE)
OUTPUT 727;"LlX" (END LINE)
NVRAM storage will be performed when the second state-
ment is executed.
Model 8573 Programming Example-Perform NVRAM
storage with the following Model 8573 statements:
V% =l:CALL IBSRE(BRDO%,CMD$) (return)
CMD$="LlX":CALL IBWRT(M617%,CMD$) (return)
NVRAM storage is performed when the second statement is
executed.
3.10.13 Data Format (G)
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