c. Accuracy.
(3% end scale + 0.1 microvolt).
d. Maximum noise (input shorted).
Range
Noise
(peak-peak)
1 microvolt
0.20 microvolt
3 microvolt
0.25 microvolt
10 microvolt - 1000 volt
0.30 microvolt
e. Meter response time (to 90% of reading).
Range
Time
1 microvolt
5 seconds
3 microvolt
3 seconds
10 microvolt - 1000 volt
1 1/2 seconds
Better than 1012 ohms at less than 50% relative
f. Input isolation.
humidity and 25C regardless of line, chassis, or recorder grounding.
Better than 1010 ohms up to 80% relative humidity and 35C.
With driven
guard, isolation improves by at least one order of magnitude up to 1013
ohms. Any input terminal may be floated 1100 volts off chassis ground.
g. DC common mode rejection.
Better than 160 db, input short-
circuited, 80% relative humidity; better than 140 db, open-circuited, 50%
relative humidity; better than 120 db, open-circuited, 80% relative
humidity.
h. AC common mode rejection (below 100 kHz).
100 volts RMS or 120 db
greater than end scale, whichever is less, will affect reading less than 2%
of end scale. Input open-circuited.
i. AC normal mode rejection (60 HZ and above). AC voltages 60 db above
end scale will affect reading less than 2% of end scale.
Maximum voltage
not to exceed 750 volts RMS.
j. Recorder output.
0-1 volt, one side at chassis ground; linear to
0.5% of end scale. Source impedance, 5k to 7.5k.
k. Stability of zero.
Better than 0.15 microvolt/hr, better than 0.3
microvolt/day.
Less than 0.1 microvolt/C from
l. Temperature coefficient of zero.
15C to 35C. Less than 0.2 microvolt/C from 0C to 50C.
m. Zero control range.
5 microvolt minimum.
70
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