Demonstration Meter Interscale
Product Code : EL-LM-10389
Quick answer: The Demonstration Meter Interscale is a large classroom meter with a 200 mm scale that teachers use to show meter readings and the principles of electrical measurement to a whole class. Its basic movement is 5 mA - 100 mV FSD with an accuracy of ±2.5% FSD. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Value |
|---|---|
| Basic movement | 5 mA - 100 mV FSD |
| Accuracy | ±2.5% of full-scale deflection |
| Scale length | 200 mm (approx.) |
| Dimensions | 300 x 150 x 300 mm |
| Weight | 2 kg (approx.) |
How the meter is used in teaching
A demonstration meter is read by the whole class at once, so its scale has to be large. The 200 mm scale of the interscale meter lets the teacher run a circuit at the front bench while students record the readings from their seats.
The stated movement rating also makes the meter a worked example for converting a galvanometer into an ammeter or voltmeter. Full-scale deflection at 5 mA with 100 mV across the movement means a movement resistance of Rm = V/I = 0.1/0.005 = 20 ohm.
- Write the movement data on the board: Ig = 5 mA, Vg = 100 mV, so Rm = 20 ohm.
- For an ammeter range I, calculate the parallel shunt S = Ig x Rm / (I - Ig); for 1 A this is about 0.1 ohm.
- For a voltmeter range V, calculate the series resistance R = V/Ig - Rm; for 10 V this is 1980 ohm.
- Compare the calculated values with the meter readings taken during the demonstration.
Key features
- Scale length of about 200 mm, readable from a distance in a classroom.
- Accuracy of ±2.5% of full-scale deflection.
- Basic movement of 5 mA - 100 mV FSD, a known rating for shunt and multiplier calculations.
- Overall dimensions of 300 x 150 x 300 mm.
- Weight of about 2 kg, so it stands firmly on a demonstration bench.
Documentation and supply
Installation instructions and a manual are supplied with the meter. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the interscale demonstration meter at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Lab Meters products
- Demonstration Meter Vertical (EL-LM-10388)
- Galvanometer EDSPOT (EL-LM-10390)
- Demonstration Meter Horizontal (EL-LM-10387)
- Ballistic Galvanometer (EL-LM-10391)
- Ohm Meter (EL-LM-10386)
- Basic Meter (EL-LM-10392)
The full range is in the Lab Meters section of the Physics Lab range.
Frequently asked questions
What is the basic movement of the interscale demonstration meter?
The movement gives full-scale deflection at 5 mA with 100 mV across it, which corresponds to a movement resistance of about 20 ohm. Accuracy is ±2.5% of full-scale deflection.
How large is the Demonstration Meter Interscale?
It measures 300 x 150 x 300 mm, weighs about 2 kg and has a scale length of about 200 mm.
What is the price of the interscale demonstration meter?
Prices are not published on the website. Add the interscale demonstration meter to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-LM-10389 and the quantity, to receive a quotation.
Does Lab Exports manufacture the interscale demonstration meter?
Yes. Lab Exports manufactures the interscale demonstration meter at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-LM-10389.
Request a quote
Email [email protected] with the house code EL-LM-10389 and the quantity, or add the interscale demonstration meter to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
