
( Brand: Fluke ), ( Model: 887AB ), ( Part Type: Voltmeter ), ( Custom Bundle: No ), ( Country/region Of Manufacture: United States )
The Fluke 887AB AC-DC Differential Voltmeter, model number 2240031, is a vintage piece of electrical testing equipment that was manufactured between 1967 and 1973. This instrument is a testament to the craftsmanship and reliability of Fluke, a renowned name in the field of test and measurement tools.
The Fluke 887AB is a dual-range voltmeter, capable of measuring both AC and DC voltages. The AC range extends from 0.1V to 1000V, while the DC range spans from 0.1V to 1000V. The differential voltage measurement feature allows the instrument to measure the voltage difference between two points without the need for a common ground, making it a versatile tool for a wide range of applications.
The 887AB features a large, easy-to-read meter with a six-digit LED display. The instrument is housed in a sturdy, die-cast aluminum case, ensuring durability and resistance to shock and vibration. The case is equipped with a handle for easy portability, making it ideal for use in both the workshop and the field.
The Fluke 887AB is powered by a 9V battery, which is easily replaceable. The instrument is equipped with a low battery indicator, ensuring that you are always aware of the battery status. The power consumption is low, ensuring that the battery lasts for a long time between replacements.
The Fluke 887AB is a calibrated instrument, ensuring that the readings are accurate and reliable. The calibration is traceable to national standards, providing you with the confidence that your measurements are accurate.
In conclusion, the Fluke 887AB AC-DC Differential Voltmeter is a robust, reliable, and accurate electrical testing tool. Its vintage design and sturdy construction give it a unique charm, while its modern features and capabilities make it a practical and effective tool for a wide range of applications. Whether you are a professional electrician, an electronics enthusiast, or a hobbyist, the Fluke 887AB is a tool that you will find invaluable.
Pros of buying a 1967-1973 Fluke 887AB AC-DC Differential Voltmeter (Model 2240031):1. Historical Value: This vintage Fluke voltmeter is a collector's item and can be a great addition to a laboratory, workshop, or a personal collection of vintage electronics.
2. Durable Construction: Fluke is known for its high-quality and durable products, and the 887AB is no exception. It is built to withstand harsh environments and rough handling, making it a reliable tool for many years.
3. Versatile Measurements: The 887AB can measure AC and DC voltages, as well as differential voltages, making it a versatile tool for a variety of applications.
4. Precision: The 887AB is known for its accuracy and precision, which is crucial in electrical engineering and instrumentation applications.
Cons of buying a 1967-1973 Fluke 887AB AC-DC Differential Voltmeter (Model 2240031):1. Limited Functionality: Compared to modern digital multimeters, the 887AB has limited functionality and may not be able to measure certain parameters like resistance, current, or frequency.
2. Calibration and Maintenance: As a vintage instrument, the 887AB may require regular calibration and maintenance to ensure its accuracy and reliability.
3. Cost: While the 887AB is not as expensive as some modern digital multimeters, it can still be costly compared to newer models that offer more features and functionality.
Conclusion:Buying a 1967-1973 Fluke 887AB AC-DC Differential Voltmeter (Model 2240031) can be a great investment for collectors and enthusiasts of vintage electronics. Its durability, precision, and versatility make it a reliable tool for many years. However, its limited functionality and potential need for regular calibration and maintenance should be considered before making a purchase. Ultimately, the decision to buy a vintage Fluke voltmeter should depend on the user's needs, budget, and appreciation for historical electronics.
Recommendation:If you are a collector or enthusiast of vintage electronics, the 1967-1973 Fluke 887AB AC-DC Differential Voltmeter (Model 2240031) can be a great addition to your collection. However, if you require more functionality and features, it may be more cost-effective to invest in a modern digital multimeter. In any case, it is essential to ensure that the instrument is in good working condition and has been properly serviced before making a purchase.
Also, where ground loops errors are a problem, the battery-operated mode eliminates these due to complete isolation from power line. The case shows lots of wear writing and buttons are a little dirty. For voltage s between 11 and 1100 volts dc, an input attenuate divides the unknown voltage by 100 before it is measured . The known adjustable reference voltage is a kelvin-varlet divider with four decades of Fluke precision wire-wound resistors and high-resolution interpolating vernier that are set accurately five readout dials to give six-digit.
Also I put on the battery test setting and meter showed a little negative, so works, but only has minimal charge see last 3 photos. I know little about these and don't the history, found at a local thrift store. The unknown voltage is then simply read from dials. Should you wish to convert 115 volts will need have the necessary skills change power transformer winding's be in parallel.
Untested, has no cord, shows case wear, appears intact inside, meter works, battery suspect. In this way the, the 11 volts can be precisely divided into smaller than 10 micro- volts . The ac input voltage is converted to dc and this measured by comparing it a known adjustable reference. S3fs-public 887a 887imeng0200.
To minimise errors due common mode voltage s, the 887AB is provided with extremely high leakage resistance ground. Typically several hundred thousand meg ohms. When used as dc differential voltmeter, the 887AB operates on principle. An unknown voltage is measured by comparing it to a known adjustable and with the aid of null detector. When used as an accurate ac voltmeter, the 887AB operates essentially same for dc differential measurements.
An accurate standard for measurement is obtained from 11-volt dc reference supply derived a pair of temperature-controlled Zenger diodes. Actual item photos. 05 of input opened it up and looks all solid state intact, not gutted for parts no burnt out odor, so good shot may work.
voltage line input: the 887AB is fitted with dual primary power transformer winding's which, when connected in parallel provide for 115 volt operation or series 230. On this I found the web, from what gather thing can be used as a tube tester too with proper knowledge:: 887AB is capable of being conventional voltmeter for determination voltage s to 1100 volts dc. Fluke see below for cut paste link, so that dates this.
001 to 1100 volts ac within of range setting differential voltmeters for precise measurement dc voltage s from. Dimensions, weight and packaging dimensions cm: w 222141weight unit only 8 kg. One feature that should be emphasised is no current drawn from the unknown source at null up to 11 volts dc input resistance 10 meg ohms.
Here is some info of range 5 micro volts or as accurate ac voltmeters for measurement voltage s from. It should be read in the context of vintage age this item.
0025 of input. S: dam-assets. This unit is currently set up for 230 volts . Found the previous model from 1965, which apparently had tubes, so this may be earliest solid state model.
The above was sourced from Fluke 887AB user guide. They can also be used to measure the excursions of a voltage about some nominal value range 5 micro volts from 30 Hz khz, with reduced accuracy and 100 khz as meg ohm-meters for measurement resistance 10 meg ohms 11,000 mega ohms typical.