It is used to measure the applied frequency. Vibrating Reed 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 distinct indication.
The instrument can be operated at 110V, 220V, or 440V. Terminal screws with washers are provided for the selected operating voltage & remaining two terminals are covered with insulated caps.In case of RFD96 and RFD144 instruments, two sets of reeds with the same scale range can be offered, giving two independent meters in one casing. This facilitates in comparing the frequency of two voltage supplies for paralleling operation
- Vibrating reed.
- No aging effect.
- Faster response.
- Lighter in weight.
- Low power consumption
- Rugged construction
- High reliability
Electrical Specifications :
|Type :||Vibrating Reed|
|Operating Voltage :||110V~125V, 220V~250V, 380V~440V.|
|Power Consumption :||Less than 0.3VA,0.6VA and 1.2VA for respective operating voltage in 72 & 96. 26 Sizes|
|Dielectric Strength :||2kV RMS for 1 minute.|
|Operating Temp :||-10°C to 55°C|
|Storage Temp :||-20°C to 70°C|
|Humidity :||Upto 95% RH|
|Conforms To :||I.S.1248 / I.E.C. 60051(Part4).|
Available Ranges :
# % of center frequency
* There are 11 reeds in a row in setps of 1Hz for range 45 – 50 – 55Hz (55 – 60 – 65Hz) with additional 2reeds for 49.5 and 50.5Hz (59.5 and 60.5Hz) respectively.
Mechanical Specifications :
Ordering Information :
1) Type 2) Operating Voltages 3) Model 4) Range