MODEL 225
OUTPUT:
RESOLUTION: Three significant figuresfrom lo-’
ACCURACY: z 0.5% of reading. 2 0.05% of full
STABILITY: -0.02% of reading, _cO.O05% of
NOISE: Less than 0.01% rms of full rangeabove
SPECIFICATIONS
D.C. Current: lo-’ ampere full range to lo-’
ampere in seven decade ranges, 3.digit in.
line readout.
Voltage: 100 voltsmaximum. Compliancelimit
continuously variable from 10 to 100 volts.
Polarity: Positive or negative.
Floating: c 500 volts maximum off chassis
ground, less than 5 ppm of full range change
in output current per volt.
to 10-l ampere. “Trim” potentiometer permits
0.02% of full range or better resolution.
ra”ge.
full range on the 10-l to 1O-6 ampere range,
(e-0.1% of reading 20.02% of range on the
10-T ampere range) the first hour or in sub.
sequent E-hour periods after a l.hour warm-
up and at reasonably constant ambient tern.
perature.
5 HZ.
SPECIFICATIONS
1
LOADREGULATION: t0.005% offullrangefrom
no load to full load on the lo-’ to 10-6 am.
pere range, 50.05% on the lo-’ ampere
range (with FILTER “OFF”).
LINE REGULATION: k 0.005% Of full range for
10% change in line voltage.
OVERLOAD PROTECTION: Voltage limited tocorn.
pliance voltage setting of polarity selected.
Automatic recovery from overload.
MODULATION: Transformer input permitsmodw
lation of current from 50 Hz to 500 Hr.
Input 2 approximately 500 ohms.
FILTER: For operation with inductive loads up to
100 millihenries having greater than 10.6L/R
ratio. Limits shunt output impedance to 1
microfarad shunted bygreaterthan 1010ohms.
ENVIRONMENT: 50% relative humidity limit at
25’C.
CONNECTORS: Output (front and rear panels):
BNC
POWER: 105.125, 210.250 volts (switch se.
lected), 50.60 Hz; 25 watts.
DIMENSIONS, WEIGHT: 5%” high x 8%” wide x
10” deep; net weight, 8 pounds.
0571
225 CURRENT SOURCE
.IWE
1
6
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