HP E8491A manual ViClosefw E8491

//turn off autorange, set a 30V DCV range errStatus = hpe1410_voltDcRang(vi, 0, 30); check(vi, errStatus);

//set a 10 us aperture time

errStatus = hpe1410_voltDcAper(vi, 10.0e-6); check(vi, errStatus);

// set 8000 readings

errStatus = hpe1410_sampCoun(vi, 8000); check(vi, errStatus);

//store the readings in HP E8491A shared memory

//specify the E8491A shared memory base address errStatus = hpe1410_memVmeAddr(vi, start_addr); check(vi, errStatus);

//specify the amount of memory required

//(8000 readings * 8 bytes/reading)

errStatus = hpe1410_memVmeSize(vi, 64000); check(vi, errStatus);

//enable the readings to be stored

errStatus = hpe1410_memVmeStat(vi, 1);

//disable multimeter error detection hpe1410_errorQueryDetect(vi, 0);

//initiate the multimeter to take the readings errStatus = hpe1410_initImm(vi);

//pause 30s to allow readings to complete Sleep (30000);

//transfer the 8,000 readings (64,000 bytes) from the multimeter using

//the VISA function viMoveIn8

err = viMoveIn8(fw, VI_A24_SPACE, 0, 64000, (ViPUInt8)rdgs); if(err < VI_SUCCESS) err_handler(fw, err);

//swap the bytes once they are transferred from shared memory for (i=0;i<7999;i++)

{

SWAP_FLOAT64(&rdgs[i]);

}

//print some readings to verify the transfer was successful for (i=0; i<10; i++)

{

printf("%lf\n", rdgs[i]);

}

//close the device sessions

hpe1410_close(vi);	//	close	E1410	session
viClose(fw);	//	close	E8491	session

52 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3