Lake Shore 480, Руководство пользователя, Страница: 62 / 132

Lake Shore Model 480 Fluxmeter User’s Manual
5-20 Advanced Operation
Corrected Analog Output (Continued)
Default: In default mode the corrected analog output mimics the monitor output. The output is scaled
to V·s units no matter what units are selected for the display. Full scale for the selected range is
scaled to 3 V so for example on the 300 mV·s range a +300 mV·s reading would give a +3 V output
and a -300 mV·s reading would give a -3 V output. The scale is changed automatically when range is
changed.
User: In user mode the user selects a value that corresponds to the maximum voltage output (+10 V)
and a value that corresponds to the minimum voltage output (-10 V). In this mode the user can scale
the analog output to improve resolution over an area of interest. Maximum and minimum values are
entered in the units selected for the display. The instrument scales output voltage between the two
values.
When “
Analog Mode: User
” is selected, you will see the “
Enter Max Output
” screen.
Enter­Max­Output
+100.000­mVs
Use the numeric keypad to enter a high reading value that results in +10 V output, then press the
Enter key. The cursor will jump to a space before the units. Use the  or  keys to select prefix
µ, m, _, k, or, M. Press the Enter key. The “
Enter Min Output
” screen then appears.
Enter­Min­Output
-100.000­mVs
Use the numeric keypad to enter a low reading value that results in -10 V output, then press the
Enter key. The cursor will jump to a space before the units. Use the

or

keys to select prefix
µ, m, _, k, or, M. Press the Enter key.
Manual: In manual mode the corrected output voltage can be set directly by the user. The output is
set in percent of full scale where +100% corresponds to +10 V and -100% corresponds to -10 V. The
setting resolution on the display is 0.001% but the actual resolution of the DAC is only 0.003%.
When “
Analog Mode: Manual
” is selected, you will see the “
Enter AOut Voltage
” screen.
Enter­AOut­Voltage
+100.000­_%
Use the numeric keypad to enter the percent of full scale that results in ±10 V output, then press the
Enter key. The cursor will jump to a space before the “
%
”. Use the  or  keys to select the “_”
prefix. Press the Enter key.
5.15.2 Monitor Analog Output
The monitor is a real time analog voltage proportional to the integrator output. The wave shape
exactly duplicates that of the integrator output. The scale of the monitor output is ±3 V for the full
scale volt-seconds of the range selected. The monitor output remains scaled to V·s even when other
units are displayed. The monitor output is not as accurate as the corrected output because instrument
and coil calibrations are digitally processed and do not act on the monitor voltage. There is no user
control of the monitor output. The output is short protected but should never be used to drive a
resistance of less than 1 k

for specified accuracy. Analog output terminals are in the detachable
terminal block on the rear of the instrument.