VTI Instruments EX1629, Руководство пользователя

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VTI Instruments Corp.
302 EX1629 Command Set
vtex1629_zero_cal
F
UNCTION
P
ROTOTYPE
ViStatus vtex1629_zero_cal (ViSession vi , ViPInt32 overRide , ViPInt32 recommendedUpTime , ViPInt32
currentUpTime );
F
UNCTION
P
ARAMETERS
vi = contains a session handle to the instrument. This handle is obtained by the function and remains valid until the
session is closed.
overRide = a returned integer value indicating the over ride value.
recommendedUpTime = an integer return value indicating the recommended amount of time, in seconds, the
EX1629 should be powered up attempting a zero calibration.
currentUpTime = an integer return value indicating the amount of time, in seconds, that the EX1629 has been
powered up.
D
ATA
I
TEM
R
ESET
V
ALUE
Not applicable to this function.
D
ESCRIPTION
This function resets the offset values of the unit before a measurement is taken. It is designed to be a shorter
calibration process than self-calibration.
The
overRide parameter is used in the case where a zero calibration is attempted on a unit that has not been
powered on for a sufficient amount of time. In this special case, the first call to this function will return an error, but
will also populate this over ride variable with a unique integer value in memory. The vtex1629_self_cal_init
function can then be called a second time using this unique value. The second call to the function will successfully
initiate a self-calibration on a unit that has not been powered up for the recommended duration of time.
E
XAMPLE
ViSession instrumentHandle;
ViStatus status;
ViInt32 overRide = 0;
ViInt32 recommendedUpTime = 0;
ViInt32 currentUpTime = 0;
status = vtex1629_zero_cal(instrumentHandle,
&overRide,
&recommendedUpTime,
&currentUpTime);