CN2093399U

CN2093399U - Pen shape avometer

Info

Publication number: CN2093399U
Application number: CN 91206729
Authority: CN
Inventors: 白彤
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-04-27
Filing date: 1991-04-27
Publication date: 1992-01-15

Abstract

The utility model discloses a pen-shaped avometer, belonging to the technical field of measuring meters for electricians. The utility model is composed of a screw driver which also acts as a positive electrode probe, a meter case, a toggling eight-span measurement range selecting switch, a zero ohm regulating potentiometer, a negative electrode meter rod socket, an electricity measuring indication neon tube, a pen pin which also acts as an electricity measuring grounding electrode, a miniature meter head and an inner circuit. The utility model whose shape is like the size of a pen has the functions of an avometer and a test pen, and has the advantages of portability, one meter with multifunction, convenient operation, economy and practicability, being an ideal portable measuring tool for electricians, maintenance men for household appliances and radio amateur.

Description

Pen shape avometer

The utility model belongs to the electric instrument technical field.

Universal electric meter is the common tool of electrical installation.Existing universal electric meter is of a great variety, and function is different, and range is wide, the precision height, and still, general volume is all bigger.Even pocket universal electric meter, a lot of people also are reluctant to carry, and often overhaul difficulty because of not being with table to increase in the work.

The purpose of this utility model is intended to provide a kind of practicality portable survey instrument for electrician, electric appliances service personnel and numerous radio amateurs.It has every function of universal electric meter.And under the prerequisite that does not influence use, suitably reduce measuring accuracy.Reduced volume has been designed to the form of a stroke or a combination of strokes universal electric meter that the pen size is convenient to carry (hereinafter to be referred as " pen table ") as far as possible.

For realizing portable purpose, the anodal meter rod of " pen table " double as own.Its lower end is the screwdriver that links the anodal probe of double as of one with red shell.Inner structure is divided into two parts, and Lower Half is eight grades of range switchs of dial type, and the first half is a double-sided printed-circuit board.Elements such as zero ohm regulator potentiometer, negative pole table tod socket, survey electricity indication neon tube and resistance, battery are arranged on the printing forme.Zero ohm regulator potentiometer can rotate at watchcase external application finger nail; Negative pole table tod socket double as set bolt; Small pin for the case is electrically connected with neon tube, as surveying the utmost point electrical ground.The top of " pen table " is miniature gauge outfit.

Owing to adopt said structure, " pen table " outward appearance is small and exquisite, is convenient to carry, and is easy and simple to handle during measurement, and a table multipotency." pen table " not only has the function of universal electric meter, but also can be used as the usefulness of test pencil.The gauge outfit design of " pen table " is convenient to direct-view dial scale when measuring on its top.Zero ohm regulator potentiometer that " pen table " is provided with still can accurately transfer to zero ohm when cell voltage is reduced to 1.2V." pen table " adopted eight grades of range switchs of dial type, only need stir the conversion that a driving lever can reach every measurement function.

Fig. 1 is the outside drawing of " pen table ".

Fig. 2 is the electrical schematic diagram of " pen table ".

1. red watchcases among the figure (the anodal table rod of double as) 2. 4. 0 ohm of regulator potentiometers of eight grades of range switchs of screwdriver 3. dial types, 5. negative pole table tod sockets 6. are surveyed the 8. miniature gauge outfit of electricity indication 7. small pins for the case of neon tube (double as is surveyed the utmost point electrical ground)

" pen table " can be designed to multiple measurement range by different purposes.The embodiment that has been developed into is applicable to electric and " pen table " that electric appliances service uses designed eight grades of nine ranges.

Alternating voltage: 400V, 40V, 10V

DC voltage: 40V, 10V, 1V

Shared one grade of DC current: 0.6mA(and 1V), 20mA

Resistance: R * 1K, center resistance 2K Ω

The sensitivity of " pen table " is direct current 1.7K Ω/V, exchanges 750 Ω/V.

Fundamental error＜± 10% of " pen table "

The physical dimension of " pen table " is maximum outside diameter 14mm, total length 135mm.

During measurement, 5. negative pole table rod plug is inserted negative pole table tod socket, stir range switch 3. to required range.2. screwdriver as anodal probe, can measure every electric parameter, and measured value draws 8. from miniature gauge outfit.During measuring resistance, be allocated to resistance grade.Short circuit both positive and negative polarity probe.Adjust zero ohm regulator potentiometer 4., pointer is referred to zero ohm.Get final product measured resistance value then.Do the test pencil time spent, 3. range switch is allocated to exchanges the 400V shelves, 7. hand contacts with a small pin for the case.With 2. contact electrification conductor of screwdriver, 6. neon tube glows.

Claims

1, form of a stroke or a combination of strokes universal electric meter is made up of watchcase (1), eight grades of range switchs of dial type (3), zero ohm regulator potentiometer (4), miniature gauge outfit (8) and internal circuit.It is characterized in that gauge outfit (8) is located at the top of table body.

2, form of a stroke or a combination of strokes universal electric meter according to claim 1 is characterized in that the eight grades of range switchs of dial type (3) that are provided with.

3, form of a stroke or a combination of strokes universal electric meter according to claim 1 is characterized in that the zero ohm regulator potentiometer (4) that is provided with.