Clarke-Hess 259 Digital V-A-W Meter

The Clarke-Hess 259 is a single-phase power analyzer designed for precise measurement of voltage, current, and power. This instrument is engineered for a variety of testing and calibration applications where accurate electrical parameter readings are critical. The Clarke-Hess 259 is known for its robust design and reliable performance in demanding environments.

### Technical Specifications

* **Model:** 259
* **Manufacturer:** Clarke-Hess Communication Research Corp.
* **Type:** Digital V-A-W Meter (Volt-Ampere-Watt Meter)
* **Phase:** Single Phase Input
* **Measurement Capabilities:** Voltage, Current, Power (Watts)
* **Display:** Digital Readout
* **Power Source Requirements:** 95-105 V or 105-125 V or 210-240 V, 50-60 Hz (line voltage and frequency to be specified upon ordering).

### Electrical Specifications

* **Maximum Voltage (DC/AC):** 1000 V
* **Maximum Current (DC/AC):** 5 A
* **Frequency Range:** Suitable for normal line frequencies from 50-500 Hertz. For Model 255 (similar in function), measurements are typically independent of waveshape from DC up to hundreds of kilohertz, with voltage and current readings typically within 1% up to 400 kHz for sine waves. Power measurements in a 100 kHz square wave can typically be measured within 2%.
* **Accuracy:**
* For sine wave inputs, voltage and current readings are typically within 1% up to 400 kHz.
* Power measurements for a 100 kHz square wave can typically be measured within 2%.
* For the similar Model 258, AC voltage and current accuracy is ±0.5% Rdg ±0.5% Range from 50 Hz to 1000 kHz, and ±0.5% Rdg ±1.0% Range from 1000 kHz to 1500 kHz. Power accuracy for loads of any power factor is ±0.75% of input Volt-Ampere product ±0.75% of range from 50 Hz to 1000 kHz.

### Interfaces and Outputs

* **Analog Output:** Optional optically isolated analog output available on related models (e.g., Model 255) providing 1 Volt for a full-scale display reading. The 259 is also noted as having an “ISOLATED ANALOG OUTPUT”.
* **Digital Output:** Related models (e.g., Model 255) offer optically isolated digital options such as Parallel, four-digit BCD output, and Remote control of functions.

### Physical Characteristics

* **Enclosure:** Housed in a heavy-duty aluminum case (as per Model 255 description).
* **Weight:** Model 255 weighs 4.1 kg (9 lbs.).

### Compatibility

* The Clarke-Hess 259 is designed for single-phase AC and DC measurements.
* It can be used in conjunction with switching power supplies, transformer losses, fluorescent lamp ballasts, R-C filter rectifier circuits, SCR circuits, mercury-arc lamp circuits, servo systems, motor testing, ultrasonics, MOV loss testing, automatic test equipment, and electric automobile efficiency measurements (applications listed for Model 255, which shares functional similarities).

Why Choose Aumictech for Clarke-Hess 259?
At Aumictech, we specialize in supplying high-end electrical test and measurement equipment. Whether you need precise power analysis for product development, reliable calibration of electrical systems, or comprehensive testing of power parameters, our team ensures the Clarke-Hess 259 delivers maximum performance for your application.