Eico 950B - Instrument Overview; General Description; Specifications

The Model 950-B is a highly flexible ac-powered bridge which measures ca-
pacitance in the range from 10 mmf to 5000 mf and resistance from 0.5Q to
500MQ on direct reading scales, employing an electron-ray ("magic eye")
tube as a visual null indicator. Measurement of resistance, capacitance, and
inductance by comparison with an external complementary standard is also
possible, in which case a special ratio scale is read. An invaluable feature
for service work is a dual-sensitivity leakage test employing a built-in source
of polarizing voltage, continuously variable from 0 to 500 volts de. The high
sensitivity leakage test is used for testing paper, mica, and ceramic capacitors
and the low sensitivity test for electrolytic capacitors. The electron-ray tube
is the leakage indicator in both tests. In addition, this instrument provides
direct power factor measurement on the higher capacity ranges in which elec-
trolytics are measured. The Model 950-B, by the nature and accuracy of its
testing and measurement facilities, will be found extremely valuable in the
servicing of TV, fm-am radio, and other electronic equipment.
specifications
Capacity:<4 ronges. we... s stu ee 10 mmf - 5000 mmf
0.001 mf - 0.5mf
0.1 mf - 50mf
50 mf - 5000 mf
Resistance: 4 ranges ............000- 0.52 - 500Q
50Q - 50,000Q
5000Q - 5MQ
5MQ - 500MQ
Comparator: “I-range=.. 2.2.52. eae oe ratio from 0.05 to 20 (400 to 1)
DC Polarizing Voltage: (for leakage test). . 0-500 volts continuously variable
Power Factor:= | ranges .. es 2 on ae 0-80%
Tube Complement: ...........2.sec0: 1316297 12645
Power Suppl y:> oat. «5 vitres oe tieeae transformer operated half-wave rect.
Power Requirements: ..........eeceee- 105-125 volts AC, 50/60 cps
Overall. Dimensions!a. 2. -enees see 8" high, 10" wide, 4 3/4" deep
Weights): ca... oc:etie aurea ee terete nen 10 Ibs.
operation
PRELIMINARY: Plug the line cord into an ac outlet supplying 105-125 volts,
50/60 cps. Rotate the POWER FACTOR control clockwise from the "AC-OFF"
position. Allow a l-minute warm-up period, during which the electron-ray
tube will slowly attain its characteristic green glow.
CONNECTIONS: The component to be measured or tested, whether it be