Resistance Box, Plug Type

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Resistance Box, Plug Type Specification

Voltage
Max 250V (for resistance selection only)

Feature
Highly accurate, easy to operate, robust design, low temperature coefficient

Automation Grade
Manual

Frequency
DC and low frequency applications

Measurement Range
1 up to 10,000 (typical depending on box)

Accuracy
0.1% to 0.5% depending on model

Core Components
Precision resistance coils, brass plug contacts

Power Source
Not required (passive instrument)

Temperature Range
0C to 40C (standard operating)

Capacity
Multiple resistance steps (e.g., 1 , 10 , 100 , 1 k, 10 k)

Type
Plug Type Resistance Box

Display Type
No digital display, values indicated by plug positions

Dimension (L*W*H)
Approx. 250 x 120 x 80 mm (varies with model)

Weight
Approx. 1.5 kg (varies with model)

Resistance Tolerance
0.1% standard

Contact Resistance
Less than 0.01 per plug

Color
Black case with white lettering

Max Power Dissipation
1 W per resistor max

Insulation Resistance
Greater than 100 M at 500V DC

Number of Decades
Four or more decades

About Resistance Box, Plug Type

For accurate work, in polished wooden box and panel figured in white. Split brass contact blocks hold precision cut, interchangeable plug having moulded black fluted tops. Coils of constantan wire, double silk covered are wound co-efficient. Accuracy + 0.1%.

Range in Ohms	Total Ohms	No. of Coils
1-50	110	8
1-100	210	9
1-500	1110	12
1-1000	2110	13
1-5000	11110	16
1-10000	21110	17

Reliable Precision for Accurate Measurements

Benefit from outstanding accuracy and stability with this resistance boxideal for calibration, laboratory comparisons, and educational experiments. The tight resistance tolerance of 0.1% and minimal contact resistance make it suitable for sensitive measurements, while robust construction ensures lasting performance.

Effortless Manual Operation

Select resistance values by inserting brass plugs into clearly labeled positions, with each decade offering intuitive adjustment. The absence of a digital display allows for straightforward use, reducing complexity in both setup and operation.

Engineered for Safety and Durability

Built to endure regular handling, the resistance box is housed in a sturdy black case with white lettering, ensuring long-term ease of identification and resistance to wear. Multiple insulation features provide added safety and ensure reliable operation up to 250V within rated specifications.

FAQs of Resistance Box, Plug Type:

Q: How do I select a resistance value on this resistance box?

A: To select a resistance, simply insert the brass plugs into the holes corresponding to your desired value on each of the four or more decades, combining them for precise settings. The total resistance is the sum of all inserted steps.

Q: What benefits does a plug type resistance box offer over dial or digital types?

A: Plug type resistance boxes offer excellent durability, simplicity, and reliability, with minimal moving parts. They provide highly accurate resistance selection without requiring power or electronic displays, making them ideal for manual calibration and fieldwork.

Q: Where is this resistance box commonly used?

A: These boxes are widely used in educational institutes, calibration laboratories, manufacturing quality control, and wherever precise variable resistance is required for DC and low frequency circuits.

Q: What is the typical measurement range and how accurate are the values?

A: Typical models provide resistance values from 1 up to 10,000 , with a standard accuracy of 0.1%. Some variations may offer slightly different ranges or tolerances.

Q: How should I maintain or store the resistance box for optimal performance?

A: Keep the resistance box in a dry, dust-free environment between 0C and 40C. Regularly check contacts for oxidation and ensure plugs are inserted fully to maintain low contact resistance and stable measurements.

Q: Can this resistance box handle both high and low voltage measurements?

A: The device is rated for resistance selection only at voltages up to 250V. Its designed for safe use at these voltages in DC and low frequency applications; avoid using it beyond specified ratings to maintain safety and accuracy.

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