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EICO Electronic Instrument Co. Inc. 242 Level Meter
Manufacturer:
Model:
242
Date:
unknown
Class:
Type:
SubType:
Solid State FET TVOM

Information

The model 242 TVOM has been designed for bench and field service in testing both vacuum tube and semiconductor circuits. This instrument combines the desirable features of a VTVM and a milliam-meter into a single attractively styled cabinet. FEATURES 1. Readings are made on the 11 scales of the large easy-to-read 6” meter. 2. An extremely wide range of d-c voltages can be measured -- from as low as 0.01 volt up to 1000 volts — in seven ranges. High voltage range can be extended to 30,000 volts by using the EICO HVP-2 Probe (not supplied). 3. An accurate milliammeter circuit permits a wide range of precise a-c and d-c current measurements from 10 microamperes to 1 ampere. 4. The seven a-c voltage ranges cover the full gamut of alternating voltage measurements from 1 volt rms (full scale) to 1000 volts rms (full scale). Each of the five a-c voltage and current scales is calibrated both for rms and peak-to-peak values. Readings are valid for a frequency range of 25 Hz to 2 MHz and can be extended to 250 MHz with EICO RF Probe PRF-11 (not supplied). 5. Seven ohmmeter ranges are available for readings up to 1000 megohms. The ohmmeter circuit operates from a transistor-regulated low Voltage Source to avoid accidental damage to semiconductors in equipment under test. This feature also prevents transistors in equipment under test from affecting resistance readings. 6. The instrument can be operated either from an a-c power source or from three self-contained 9-volt transistor-type batteries, permitting the use of the TVOM as a completely portable unit at remote locations. Standoffs at the rear of the cabinet provide a convenient storage facility for the a-c line cord when it is not being used. 7. The model 242 uses the EICO-exclusive Multi-Probe. Only one convenient "hot” Probe with a fingertip control is used for all functions, eliminating tangled test leads. 8. A state-of-the-art, FET-input, high-impedance input stage drives the sensitive differential Amplifier circuit. The voltage regulated Power supply and high-quality 1% multiplier resistors used in this instrument assure stability and accuracy on all ranges. The FET input circuit is completely protected from possible overloads by a fast-acting semiconductor network.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
24
Size:
5.38 Mbytes (5644633 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
unknown
Quality:
Scanned document, all readable.
Upload date:
2020 05 25
MD5:
06415b361d24c17fe1ef73aba447bc2b
Downloads:
252

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