Associated Research HypotULTRA 7800, Operation And Service Manual

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02 Internal 4 Channel Scanner with Continuity
This option is the same as Option 01, 8 Channel Scanner with Continuity, with
the exception that the numbers of channels are limited to 4. The Scanner
functions the same as the 8-channel option but the Scanner status display will
only indicate the status of channels 1-4, even though all 8 channel indicators are
displayed.
04 3mA AC/DC Output
The 3 mA AC Output option limits the AC Dielectric Withstand Mode output
current with software control. The trip points are adjusted to a maximum of 3 mA
and the software has been modified so the high-speed maximum current
shutdown is fixed at 3 mA. The following table shows the specifications for this
option:
3mA AC / DC Output
AC WITHSTAND VOLTAGE
SETTINGS
HI and LO-Limit
(Total), current, mA
0.000-3.000 0.001 ± (2% of s 6 counts)
HI and LO-Limit (Real),
current, mA
0.000-3.000 0.001 ± (3% of s 50µA)
MEASUREMENT
HI and LO-Limit
(Total), current, mA
0.000-3.000 0.001 ± (2% of s 2 counts)
HI and LO-Limit (Real),
current, mA
0.000-3.000 0.001 ± (3% of s 50µA)
Current Offset
0.000 - 3.000mA (PF=0.00-1.00) *(Total c current offset
≤3.000mA)
Short Circuit Protection minimum current 3.5mA RMS at short circuit, Response time < 2ms
DC WITHSTAND VOLTAGE
SETTINGS
HI and LO-Limit,
current, nA
0.0-999.9 0.1
± (2% of s 10 counts)
Low Range is ON.
1000 - 9999 1
HI and LO-Limit,
current, uA
10.00 - 99.99 0.01
100.0 - 999.9 , Low range
= ON
0.0 - 999.9 , Low range =
OFF
0.1
± (2% of s 2 counts)
1000 - 3000 1
MEASUREMENT
DC Current, nA
0.0 - 400.0 DC
(0.000 - 565.7 Peak)
0.1
± (2% of r 10 counts)
Low Range is ON.