FREQUENCY METERS

FREQUENCY METERS

REED TYPE

POINTER TYPE

Beemet Frequencey meters are used to measure the applied frequency. They come as Pointer Type with built in Trasducer and Vibrating Reed Type.

Salient Features

• Vibrating Reed Type Frequency meters indicate the supply frequency by means of individual reeds, when
    rated voltage+ 20% is applied across the terminals of the meter, the particular reed, whose natural
    frequency of vibration coincides with the supply frequency, vibrates with full amplitude. In case the supply
    frequency falls midway between two reeds both the reeds vibrate, at reduced amplitude. The amplitude
    of vibration at the tip of reeds is high enough for a distint indication.

• The Pointer Type Frequency Meter has a clear, well defined scale marking at 90 degree angle. The pointer
    indicates the applied frequency when voltage is applied across the terminals of the meter.

General Specifications

Accuracy ±1.5 / 2.0 of FSD
Measurable Quantities AC and DC Voltage or Current
Pointer deflection 0 - 90º
Frequency 50/60Hz
Sensitivity 1000Ω/V (Voltmeter); 2000Ω/V (ammeter)
Overload Capacity According to IS: 1248 / IEC 51
Short duration for voltmeter 2 times for 5s: 1 overload
2 times for 0.5s: 9 overload
Short duration for ammeter 10 times for 5s: 1 overload
10 times for 5s: 9 overload
Continiously 1.2 times rated voltage or current
Operating Temperature -10 to 55°C
Storage Temperature -25 to 65°C
Relative Humidity < 75% annaul average, non-condensing

Range Chart

Model Description Ammeter
SF - 72, 96 Reed Type 45-50-55 HZ,    47-50-53 HZ,    55-60-65 HZ
SP - 72, 96 Pointer Type 45-50-55 HZ,    47-50-53 HZ,    55-60-65 HZ

Dimensions

Model Dimensions (mm) Scale Length
A B C D E F G Panel Cutout
SF-72, SP-72 72 33 6 40 66 18 38 67x67 60
SF-96, SP-96 96 33 6 41 90 30 40 91x91 90

Wiring Diagrams

DC Moving Coil Voltmeter and Ammeters: 

Voltmeter with direct connection
Ammeter with direct connection
Ammeter with Shunt

AC Moving Coil Voltmeter and Ammeters: 

Voltmeter with direct connection
Voltmeter with PT
Ammeter with direct connection
Ammeter with CT