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Maximizing Measurement Speed
Comments
56
Using the HP E1326B/E1411B Multimeter
This program shows the multimeter configuration required to make
measurements at the fastest possible rate (13150 readings/sec).
10
! Dimension a computer array to store the readings.
20
DIM Rdgs(1:500)
30
! Clear and reset the multimeter. For mainframes with a display and
40
! keyboard, turn off monitor mode so the measurements are not displayed.
50
CLEAR 70903
60
OUTPUT 70903;"*RST"
70
OUTPUT 70903;"DISP:MON OFF"
80
! Configure the multimeter for DC voltage measurements. Increase
90
! measurement speed by specifying a fixed range (7.27), the worst
100
! resolution (MAX), and turning autozero off. Specify the number of
110
! readings in the burst and set the fastest sample rate. Store the
120
! readings in mainframe memory.
130
OUTPUT 70903;"CONF:VOLT:DC 7.27,MAX"
140
OUTPUT 70903;"
150
OUTPUT 70903;"
160
OUTPUT 70903;"
170
OUTPUT 70903;"
180
OUTPUT 70903;"INIT"
190
OUTPUT 70903;"FETC?"
200
! Enter the readings and display selected measurements.
210
ENTER 70903;Rdgs(*)
220
PRINT Rdgs(1),Rdgs(250),Rdgs(500)
230
END
The 13 kHz reading rate is achieved under the following conditions:
function
range
resolution
aperture time
autozero
sample rate
reading storage
In addition, there should be no activity by other instruments in the
mainframe.
CAL:ZERO:AUTO OFF"
SAMP:COUN 500"
SAMP:SOUR TIM"
SAMP:TIM MIN"
= DC voltage
= fixed
= least
= 10 s
= off
= 76 s (MINimum)
= mainframe (or shared) memory
Chapter 3
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