Polycarbonate housing having UL 94 V-0
All Rishabh meters are housed in robust case with classical finish. The case is made of polycarbonate, which is flame retardant and non-drip and confirms to international regulations UL 94 V-0. Polycarbonate is a very tough and light weight engineering plastic material which has got the best mechanical properties very close to a metallic housing. It is 10% glass filled, glass fibers give it extra toughness.
Vibrating Reed meter Functional Principle
Vibrating Reed type frequency meter is a mechanical resonance type frequency meter which consists of an electromagnet and reeds. This movement consists of a number of thin steel strips called reeds fixed on a steel plate. These reeds are placed in a row close to an electromagnet. The coil of an electromagnet is connected across the supply, whose frequency is to be measured, along with a series resistance, mounted on the backside of the resistance.
Terminal screws and clamps
Self lifting terminal screws are connected to the terminal clamps. Self lifted clamps gets lifted with the terminal screw while unscrewing, this simplifies clamping of the connectors or wire and save the time
Terminal protection with click-fitting back cover
All Rishabh meters are supplied with a self-clicking back cover which covers the terminals. This is very important feature especially for the voltmeter because these meters are usually connected on the front panel which can be opened and can be hazardous for the engineer while the maintenance of the panel is being done. The self-click avoids problems of loosing the screws and washers.
Mounting arrangement
The meter has a unique swivel clamp which could be mounted in any of the two different positions at 90 deg to each other. This makes the meter suitable for grid-racking so that a number of meters can be mounted horizontally or vertically in one rectangular cut-out. This feature is also useful because making one rectangular cut-out is more economical than making several cut-outs. The design of the housing and swivel is such that it can accommodate any panel thickness from 1mm to 40mm.
Easy replacement of glass and bezel
Easy replacement of glass and bezel is possible in Rishabh meters at customer end without any tool. The glass with zero knob and bezel are click fitted in the meter.