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Electronic Led Frequency Meter
| DESCRIPTION | |
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It is used to measure the applied frequency, functionally similar to vibrating reed meter. The meter incorporates light emitting diodes LEDs which are used instead of vibrating reeds to indicate applied frequency. The frequency is determined by blinking LEDs. When applied frequency matches with the frequency marked on the dial, that particular LED blinks with maximum intensity. When the applied frequency is mid way between two adjacent LEDs, both LEDs blink. When the meter is switched on all the LEDs glow sequentially for a period of 1 to 1.5 seconds, thereafter it will indicate the applied frequency. |
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All voltage ranges are available in single meter. Terminal screws with washers are provided only for specific voltage as per requirement & remaining two terminals are covered with insulated caps. |
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| FEATURES | |
| • | No vibrating parts. |
| • | No aging effect. |
| • | Faster response. |
| • | Lighter in weight. |
| • | Low power consumption |
| • | No effect of external vibration |
| • | Visible in dark & from distance. |
| ELECTRICAL SPECIFICATIONS | ||
| • | TYPE | ELECTRONIC |
| • | OPERATING VOLTAGE | 110V~125V, 220V-250V, 380V~440V. |
| • | POWER CONSUMPTION | Less than 3VA (Single scale), Less than 6VA (Double scale). |
| • | MEASURING METHOD | Time measurement between consecutive cycles. |
| • | DISPLAY | Box LED, Colour Red/Green, Size 6.3 X 3.7mm |
| • | SAMPLING RATE | 2-3 samples/sec. |
| • | RESPONSE TIME | Less than 1 sec. |
| • | INSULATION RESISTANCE | Greater than 20 Mohms at 500V DC. |
| • | 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 / B.S. 89. / I.E.C. 51. (Part - 4) |
| AVAILABLE RANGES | ||||||||
| MODEL | ELFS 72 | ELFS 96 | ELFS 96 | ELFS 144 | ELFS144 | |||
| RANGE | Resolution | LEDS | Acc. # |
Single Scale | Single Scale | Double Scale | Single Scale | Double Scale |
| 45 -50 -55 | * | 13 | ±1 |  |
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| 47 - 50 -53 | 0.5Hz | 13 | ±1 | |
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| 55 - 60 - 65 | * | 13 | ±1 | |
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| 57 - 60 - 63 | 0.5Hz | 13 | ±1 | |
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| 370-400-430 | 5Hz | 13 | ±1 | |
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| 45 - 50 - 55 | 0.5Hz | 21 | ±1 | -- | |
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| 48 - 50 - 52 | 0.2Hz | 21 | ±0.5 | -- | |
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| 55- 60 - 65 | 0.5Hz | 21 | ±1 | -- | |
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| 58 - 60 - 62 | 0.2Hz | 21 | ±0.5 | -- | |
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| 380-400-420 | 2Hz | 21 | ±0.5 | -- | |
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| # % of center frequency Available models |
| * There are 11LEDs in a row in steps of 1Hz for range (45-50-55Hz)/(55 - 60 - 65Hz) with additional 2 LEDs for (49.5 and 50.5Hz) / (59.5 and 60.5Hz) respectively. |
| NOTE : Frequency Meter For Other Range / Resolution Shall Be Supplied on Request If Feasible |
| MECHANICAL SPECIFICATIONS | |||||
| MODEL | ELFS 72 | ELFS 96 | ELFD 96 | ELFS 144 | ELFD 144 |
| SIZE (mm) | 72 x 72 x 70 | 96 x 96 x 70 | 96 x 96 x 70 | 144 x 144 x 60 | 144 x 144 x 60 |
| PANEL CUTOUT (mm) | 60 x 60+0.7 | 92 x 92 +0.8 | 92 x 92 +0.8 | 138 x 138+1.0 | 138 x 138+1.0 |
| WEIGHT (Approx.) | 350gms. | 400gms. | 600gms. | 500gms. | 700gms. |
| TERMINAL ARRANGEMENT | |
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| ELFS 72 | ELFS 96 / ELFD 96 |
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| ELFS 144 | ELFD 144 |
| Ordering information |
| 1) Type 2) Model 3) Range 4) Operating Voltage |
Our Vision
* To embrace new technologies and methods. * To give unsurpassed products and services to the clients. * To constantly look for improvement and changes.
