HP E1411A, Руководство по обслуживанию

Страница: 77 / 78

AC Voltage
Adjustments
This example performs an AC Voltage adjustment for a power line
reference frequency of 60 Hz and an input of 5.6 Vac at 1 kHz. If no
calibration error occurs, the program displays an "adjustment complete"
message. If a calibration error occurs, the program displays the calibration
error and prompts you to repeat the adjustment (see Table 5-1 for a list of
calibration errors).
/* AC Voltage Adjustments E1411A/B */
#include <sdtio.h>
#include <sicl.h>
#define ADDR "hpib7,9,03" /* Address of device */
void main ()
{
INST id; /* Define id as an instrument */
char cal_code[256];
#if defined(__BORLANDC__) && !defined(__WIN32__)
_InitEasyWin();
#endif
ionerror(I_ERROR_EXIT); /* Exit on error */
id = iopen (ADDR); /* Open instrument session */
iprintf (id, "*RST\n"); /* Resets and set autozero
ON and PLC to 1 */
printf (id, "CAL:LFR 60\n"); /* Sets line reference to 60 Hz */
retry:
printf("\n Set AC Standard to 5.6 Vac at 1.0 kHz");
printf("\n press ENTER when ready\n");
getchar (); iprintf(id, "FUNC:VOLT:AC\n"); /* Set DCV function */
iprintf(id, "VOLT:RANG 5.6\n"); /* Set E1326B range */
iprintf(id, "CAL:VAL 5.6\n"); /* Set CAL:VAL value */
iprintf(id, "TRIG:DEL .05\n"); /* Wait for settling */
ipromptf(id, "CAL?\n", "%t", cal_code[i]); /* Read voltage */
if (cal_code != 0)
{
printf ("\nCalibration Error %s on 5.6 Vac range", cal_code);
printf ("\nCheck source value/connections, then");
printf ("\npress ENTER to retry this adjustment");
getchar ();
goto retry;
}
else
printf ("\nAdjustment complete for %f Vdc input", volts[i]);
iclose (id); /* Close instrument session */
}
Appendix B Verification Tests - C Programs 77