HP E1411A, Руководство по обслуживанию

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Adjustments
These programs are designed to do the adjustments found in Chapter 5 -
Adjustments.
DC Voltage
Adjustments
This example performs DC Voltage adjustments for a power line reference
frequency of 60 Hz. 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).
/* DC Voltage Adjustments E1411A/B */
#include <stdio.h>
#include <sicl.h>
#define ADDR "hpib7,9,03" /* Address of device */
void main ()
{
INST id; /* Define id as an instrument */
float range[10] = {8.0, 8.0, 0.125, 0.125, 1.0, 1.0, 64.0, 64.0,
300.0, 300.0};
float volts[10] = {7.7, -7.7, .121, -.121, .97, -.97, 62.0, -62.0,
300.0, -300.0};
char cal_code[5][256];
int i;
#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 */
iprintf (id, "CAL:LFR 60\n"); /* Sets line reference to 60 Hz */
for(i = 0; i 10; i++) /* Take voltage measurements */
{
retry:
printf("\n Set DC Standard to %.1f VDC", volts[i]);
printf("\n press ENTER when ready\n");
getchar ();
iprintf(id, "FUNC:VOLT:DC\n"); /* Set DCV function */
iprintf(id, "VOLT:RANG %f\n", range[i]); /* Set E1326B range */
iprintf(id, "CAL:VAL %f\n", volts[i]); /* 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 for %f Vdc input", cal_code,
volts[i]);
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 */
}
76 Verification Tests - C Programs Appendix B