Equipment information:

Solartron 7071 Digital multimeter
Model: 7071
Date: 1985
Category: Measurement instruments
Group: Digital multimeter
Description: Digital Voltmeter
                                    The 7081 voltmeter is a high quality instrument designed for
calibration, laboratory and systems applications. It
combines superb measurement performance with data storage
facilities and processing power. The unit has no internal
options having all facilities as standard.

The instrument provides the following facilities:

•	DC voltage and resistance measurements to a scale length
of 140 000 000 and true rms volts ac, or volts ac + dc, to a
scale length of 1400 000.

•	The ability to ratio any of the above inputs to a dc
voltage or to a constant.

•	Automatic storage of results (History file).

•	Processing of measurements to provide additional results.

•	Remote control using either RS232C or IEEE-488 (GP-IB)

•	Calibration, via either of the two interfaces, without the
need to remove covers.

•	Interface for Minate analogue scanner, providing a
multi-channel measurement capability.

Measurement Capability

DC voltage measurements can be made using scale lengths of
3,4,5,6,7 and 8x9; the 3 and 4x9 scales are available only
by remote control. Each scale length provides a different
integration time and can be used over all ranges, i.e. 0.1
to 1000V.

Two types of ac voltage measurement are possible; a true rms
value of the ac component only of an input or the rms of the
total signal (ac + dc). Scale lengths of 3,4,5, and 6x9 and
ranges of 0.1 to 1000V are available for both types of

Ranges of O.1kΩ to lOOOMΩ are provided for resistance
measurement; the 0.1,1,10,100 and lOOOkΩ ranges use a 4
terminal technique whereas the 10 to lOOOMΩ ranges use a
special ratio method. The 7081 also offers a ‘True ohms’
facility, i.e. the unit measures the resistance with the
current source off and then with it on. Subtracting the
former measurement from the latter removes any errors caused
by thermal emfs or external currents. The 7081 ‘True ohms’
facility can deal with emfs of up to 10V.

All measurements taken by the 7081 are averaged readings
over the selected integration time.

These manuals are available for the above equipment:

Solartron -- 7071 -- Service Manual
File name: Solartron-5318-Manual-Page-1-Picture
Manual Type: Service Manual
Pages: 166
Size: 68.05 Mbytes (71358058 Bytes)
Language: english
Revision: 5
Manual-ID/Number: 70810014
Date: August 1986
Quality: Scanned document, all readable.
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Downloads: 20662 since 12 January 2014

This manual contains technical information that is intended
primarily to meet the needs of the service engineer. A
detailed treatment of the principles of operation is not
included but the descriptive text covering each circuit
diagram is sufficient to enable the reader to understand the
purpose of the circuit and its effect on its input(s). To
facilitate fault diagnosis, attention is drawn to
peculiarities of circuits, together with any precautions
necessary when carrying out checks.

Both the 7081 and 7071 have identical electronic circuits.
This means that all the circuits diagrams included in this
manual are valid for both instruments. The difference
between these two instruments exists primarily at the
software level, and on the higher specification components
required by the 7081 . The 7081 undergoes a significantly
more rigorous quality control procedure.
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