Clamp Meter Not Reading Current
may also need a current clamp accessory that measures AC current up to 50 amps. Ideal precision meter. How we sell great tools at the lowest prices. Clamp On Flow Meter Brief. To check if something is draining your battery while your bike is turned off you need to test for current, not volts. To do so, do the following: Switch your Digital Multimeter to DC AMPs. We charge per kilolitre. 5 amp reading on L1. A three axis meter has 3 sensors in it, all aligned at right angles to each other. The ACS712 Current Sensor is a cool little device for making current measurements. 18 or later is installed. According to Flir, the CM94 clamp meter is a True-RMS 2000A AC/DC clamp meter with an oversized, 55 mm jaw opening that can be used on larger conductors and busbars. as dirt or moisture in the terminals can affect readings. * Check your bill’s messages for the dates when you should submit. Whether you are simply checking for connectivity or actively measuring the flow of current in a circuit, electrical circuit meters and multimeters are vital. Fluke model 41 power meter. but, depending on the magnetic saturation in the CT, the output may not be exactly proportional. A clamp-on ammeter measures the current on a circuit by measuring the strength of the magnetic field around a single conductor. 323 Measuring Instruments pdf manual download. Gas Meters. Wire should be center inside the jaws. Some Fluke clamp meters have a 1,000-A limitation with the fixed jaw and all have a 2,500-A maximum current measurement with a flexible probe. Instruct an assistant to crank the car's engine while you read the meter display. The proper installation of bonding and grounding devices is important in the protection of personnel and equipment. Amps is usually indicated by an "A" on the Multimeter Switch. When the grid meter system is properly wired, grid or cathode bias voltages will not cause an error in grid current reading. Time to start over. As an AC clamp meter, this is an excellent choice for the price. Turn off etc… –This can cause the battery in the meter to run down. It is the meter reading positive or negative, not electrons running backwards. Examples: Disk usage, the relevance of a query result, etc. manufactures vane style, vortex shedding, rotameters and laminar flow element flowmeters for use in industry. mV), the meter may display an unstable reading when the test leads have not been connected to the load to be measured. Fortunately in the practical electrical world values of voltage (current) do not grow in a boundless. Clamp Meters | Clamp Multimeters - Hioki. Clamp allows measurement of AC and DC current in wires without disturbing the circuits or contacting live terminals Auto range simplifies operation: 0. I believe that clamp meters are known to be somewhat inaccurate when measuring low DC currents, and that one way to improve accuracy is to wind the cable being tested a number of times and then clamping the bundle (the reading being divided by the number of turns). One Etekcity Digital Clamp Meter & Multimeter user advises that this meter is not a true RMS meter, but rather a clamp AC current meter. When the grid meter system is properly wired, grid or cathode bias voltages will not cause an error in grid current reading. active power, that is, the product of the voltage difference and the current flowing through the current terminals in a circuit. A clamp meter will tell you actual current load, but not capacity, so it would not be of value for the purpose you describe. If you are using a true RMS multimeter, your current reading will also be true RMS (though dependent on the limitations of the meter and clamp accessory). Kyoritsu Electrical Instruments Works, Ltd. Hioki clamp meters are best in class handheld current and voltage meters for safely and accurately measuring power lines. The meter itself is tough and includes everything you need to get up and running. as the pipette current. Set the Function switch to the 400 or 200A range. If the meter is turned 90° from the maximum reading, it will read nearly zero. This tells us what direction the current is flowing-Use a clamp amp on the output lead of an alternator to check amperage. Therefore, since being introduced for practical use in the late 1970s, its market has rapidly expanded in many industries such as oil, chemicals, and foods. This meter allows the user to safely and easily view current measurement with the exclusive second TightSight® display. Hioki clamp multimeter family includes high accurate AC/DC clamp meters and portable clamp meters to measure leakage current and ground resistance. 30/32 Clamp Meter Instruction Sheet Revised Copy Page 1 of 12 1/28/00 ® 30/32 Clamp Meter Instruction Sheet WRead First: Safety Information To ensure safe operation and service of the meter, follow these instructions: • Avoid working alone so assistance can be rendered • Never use the meter on a circuit with voltages higher than. They're used primarily to troubleshoot electrical and HVAC systems. designed clamp around the wire to measure current. Using a digital clamp meter is an uncomplicated and safe way to measure current in a circuit. How to read your electricity meter. Re: Multimeter Not Reading Current I betcha the fuse in the DMM is toast. ENCIRCLE ONE POWER WIRE - Position one line lead (L1 or L2) so that the jaws of the ammeter encircle one power lead. • Do not use the meter during electrical storms or in wet weather. Alternator diodes - how test if they are blown? then fire up the motor with a DC clamp meter on the B+ output wire of the alt. Clamps measure current. Remote display clamp meters feature state-of-the-art signal processing that can enable stable readings even in noisy electrical environments. If the meter is turned 90° from the maximum reading, it will read nearly zero. The OP has stated that you obviously would not want to try it but was wondering if the meter would read the current - assumed he wanted to know if the reading would be fairly accurate I know I want to know just out of curiosity. A current transformer senses the fluctuations in the magnetic field and converts the value to an AC reading, which shows up on your display. mV), the meter may display an unstable reading when the test leads have not been connected to the load to be measured. But if you insist on using an amp meter, here's the information. Know how much electricity your home is using. The peak hold button is located on the left side of the meter (bottom button). damage the meter. If you should forget to change it back you could burn out your meter. Anyone who does any work around electrical equipment knows the benefits of a digital multimeter. • Never use the meter on a circuit with voltages that exceed the category based rating of this meter. The important thing to remember is that a "true RMS" meter will give you better readings. The Fluke meter can only achieve an accuracy of a few percent because of its use of a clamp-on current probe. • This meter is designed for indoor use at working temperatures in the range of 0-40 °C. A clamp meter consists of a current probe, which allows the measurement of AC or DC current passing through a wire without direct electrical connection to it. The more current, the stronger the magnetic field. It’ll record up to 200 amps of your home’s electricity use in real-time with 99% accuracy. Digital multimeters are the best option for this since they give a more accurate reading, although you could also use an analog one. The company’s smart meter solution is based on industry best practices, and built on a secured network designed to protect customer data. Notice the point where the jaw tips of a Hall Effect clamp meter meet. that the default settings of your meter are not what you desire. • A DMM or clamp meter with a detachable display that can be. FREE 2-Day Shipping Electronics & Office Movies, Music & Books Home, Furniture & Appliances Home Improvement & Patio Clothing, Shoes & Accessories Baby Toys, Games, and Video Games Food, Household & Pets Pharmacy, Health & Beauty Sports, Fitness & Outdoors Auto, Tires & Industrial Photo & Personalized Shop See All Departments. The shunt works too, don’t get me wrong but my approach would be to connect the meter in line with the negative battery lead on the 10A input. manufactures vane style, vortex shedding, rotameters and laminar flow element flowmeters for use in industry. • Never use the meter on a circuit with voltages that exceed the category based rating of this meter. Metering Types. But many of us still prefer the old kind of meter with a pointer that sweeps back and forth on a dial. This is because a digital multimeter, unlike an analog multirneter, requires a power supply for the LCD meter and internal circuits. Since today’s clamp-on Amp probes have come a long way, this is not much of a problem. Set the speed control to zero or "Stop" and turn on the power supply. Unlike regular meters, the clamp type does not put the meter into the circuit, but measures the field induced by a current passing through the clamp. Current Measurement using Multimeter. The Oxygen Sensor used in this device gets very hot in operation. These power monitors show operating costs of your household appliances. Don't know your energy supplier? For your gas supplier, visit Find My Supplier or call 0870 608. The clamp-on meter with smooth dial can test ACA ACV DCV resistance continuity diode and NCV. The different Scheduled Meter Reading Categories are and not limited to 01 Meter Reading by Utility 02 Meter Reading by Customer 03 Automatic Estimation 04 Meter Reading Interpolated The scheduled Meter Reading…. Also knowing how to measure current to gain the best of the multimeter is also important. In this way, it does not respond to the current on the inner but only shows any current on the outside of the braid, which should ideally be zero. Figures 1-6 through 1-8 illustrate the proper use of the voltmeter and the types of readings that can be expected. This clamp meter offers true RMS for greater accuracy. The auto-ranging scale eliminates the need to set the correct range when making electronic measurements. Users can test the voltage without contact. It can be judged that detection with an electromagnetic flow meter is not possilbe. Although it is not as common to measure electrical current as it is to measure voltage, it is nevertheless and important ability to be able to measure current. Set the rotary function switch to the AC 400A or 40A or the DC 400A or 40A position. The lowest range is 40A with four digit display, meaning the lowest reading is 10mA. 01-400 Amps,. This meter can measure AC currents up to 600 A, and AC and DC voltages up to 600 V. The FreeStyle Libre 14 day system does not have alarms unless the sensor is scanned, and the system contains small parts that may be dangerous if swallowed. Similarly, the emf produced at the point two interacts with the alternating current at point one, resulting in the production of torque again but in opposite direction. • Do not use the meter or test leads if they appear to be damaged. 3-2 AC Current Measurement 1. A current transformer senses the fluctuations in the magnetic field and converts the value to an AC reading, which shows up on your display. of Current transformers is 0. Since these circuits have some current, make a note of these readings and use them as reference. How do I read my water meter? What happens to my current bill now that I have had a meter fitted? Why has my water meter stopped recording? If my bill is estimated, can I contact you with an actual reading? How can I identify my water meter? I was told my account was on 'hold' but I'm still receiving bills and/or reminders?. Clamp on ultrasonic flow meter is famous for its unique non-invasive installing,which provides non intrusive flow measurement for closed pipe. A precise fraction of the current flowing in the circuit is diverted to operate the motor. A built-in NCV tester adds even more convenience. Set the multimeter to "2V" in the DC (direct current) range. The meter gives True RMS readings and measures current without having to contact live conductors. 2) If you are reading (-) amps, it simply means you have the pickup hooked up in the wrong orientation. Know how much electricity your home is using. It can read the Voltage (AC/DC), Resistance/Continuity, Temp. Almost all portable electronics use direct current), not alternating current. but, depending on the magnetic saturation in the CT, the output may not be exactly proportional. Note whether the meter is reading positive or negative. Can't read the image? click here to refresh Enter the Captcha text here : *Please enter the Service Number as shown below : for example 121 5 5 has to be entered as. 4 8/14 AC Current Measurements WARNING: Ensure that the test leads are disconnected from the meter before making current clamp measurements. Metering Types. Now take reading of the clamp meter. This clamp meter offers true RMS for greater accuracy. In cases of measurement by a multitester and digital multimeter, the circuit must be cut to measure current. 16kV voltage with this 600V meter, however can you use it to measure current since you are only looking at the magnetic field from the current?. Unauthorized modification may impair the function and/or safety and could affect the life of the equipment. Fieldpiece mini clamp meters are only 8-inces tall and range from basic to True RMS models. Use this clamp-on multimeter to test amperage up to 400A. Clamp-On / Precision / Split Core Current Transformer ; New Launches. To hold the highest reading on the LCD, press the peak hold button. To test: load unit as in Figure 2 and measure field current with current clamp or use 10 A jack on digital multimeter. With this in mind, you can add up the RMS currents per phase to determine total current consumption (what the power company would charge you). How do I read my water meter? What happens to my current bill now that I have had a meter fitted? Why has my water meter stopped recording? If my bill is estimated, can I contact you with an actual reading? How can I identify my water meter? I was told my account was on 'hold' but I'm still receiving bills and/or reminders?. Alternatively, you can use a clamp meter that com - bines all the measurement capabili - ties listed above. To carry out this test, get yourself a clamp meter that can read DC amps, most clamp meters are built to measure only alternating currents, just a few measure direct current. 16kV voltage with this 600V meter, however can you use it to measure current since you are only looking at the magnetic field from the current?. >>>See Here For Pricing. When current is > 0. The current level that will be reached depends on the wires resistance (measured in ohm’s ‘Ω’, easily read with a multi meter). Zeroing the meter removes dc offset from the reading. The absolute accuracy is about 150-170 milliAmpere, but it is not much taking into account that our measuring range is 40 A. Figures 1-6 through 1-8 illustrate the proper use of the voltmeter and the types of readings that can be expected. Similarly, on an oscilloscope this is known as “AC Coupling” since a capacitor effectively blocks any DC current from flowing. If you want to measure your power consumption accurately, your best bet is to read your meter directly. Most true-rms reading clamp meters have crest factor specifications of 2:1 or 3:1. A clamp meter is an electrical tester that is a combination of multi-meter and sensors. Ammeter in Series: An ammeter (A) is placed in series to measure current. Clamp On Flow Meter Brief. Do not test current on. an ac clamp will not work. Better, its really easy to use with an Arduino. All you have to do is to clamp the current sensor around one of the wires where the. When current is > 0. Using a digital clamp meter is an uncomplicated and safe way to measure current in a circuit. Q: Can I use a calibrated clamp-on meter to cali-brate an ammeter,instead of a shunt? A: We do not recommend it. test it on numerous other appliances and a couple of 115 volt outlets, meter did not read current. A DC clampmeter works on the principle of the Hall Effect. Sure, for perfectly accurate measurements you need to monitor both the supply voltage and current but for simple household monitoring which gives estimates cost to the closest few cents, why not keep things simple. Quality liquid flowmeters for: process chemicals, water, fuels, & oils, dairy and beverage, and many other industrial fluids. The DT3266L is a Digital Clamp Meter manufactured in China, and available through the eBay outlets. , clamped) and the resultant current response to be measured. 5 amp reading on L1. There is a battery in it that is used to test resistance with that will discharge if the test leads get crossed during storage. * Check your bill’s messages for the dates when you should submit. However, in DC conductors, the current flows in a fixed polarity. The more current, the stronger the magnetic field. NOTE- Do not exceed the current rating of your meter – it will blow a fuse. • Do not use the meter during electrical storms or in wet weather. This is basic principle of working of an induction type meters. In your case, the other resistors limited the current and avoided damage. Owners say the 323 clamp meter gives you accurate readings on low current measurements and of course you get the reliability factor that comes when buying a Fluke product. In this way, it does not respond to the current on the inner but only shows any current on the outside of the braid, which should ideally be zero. If there is any power in the battery and your meter is working a reading will appear that is not near zero and will remain constant until you disconnect the electrodes. In contrast, with a clamp meter, current can be measured simply by. mV), the meter may display an unstable reading when the test leads have not been connected to the load to be measured. The Fluke 41 also measures the "power factor" (PF), which is the real power divided by the apparent power. You only need the first 5 numbers from left to right, not the last number which may be in red. The MApp mobile app and meter can be separated by about 60 feet and still monitor, record, and send reports on electrical service status. to get acurate readings whit a multimeter mesuring current, you need something called true rms. Clamp Meters | Clamp Multimeters - Hioki. Voltage and Current Data Loggers Current and voltage data loggers are used when you want to monitor and record voltage and amperage levels. Read the current on the primary display and the frequency on the secondary display. What kind of meter are you using?. I use true rms clamp dc/ac meter when searching for electric errors in power grid systems. The flow meters are mainly developed on two. A built-in NCV tester adds even more convenience. This clamp meter offers true RMS for greater accuracy. He is using SMAW. Set the probe to its lowest scale and if the meter does not have auto ranging, make sure it’s set to read millivolts (some volt meters have a built-in current probe setting). reading on the LCD of the clamp meter is the insulation resistance value; if the reading is below 19MΩ, set the rotary switch of the the clamp meter and the range switch of the insulation tester unit to 20MΩ range position to increase the measurement accuracy. Also, there are a lot of different versions of this meter on eBay, some with different current capacities, some without shunts. They will cancel each other out. In this way, it does not respond to the current on the inner but only shows any current on the outside of the braid, which should ideally be zero. Keeping your world up and running. Set up your DMM as follows: To measure ac current with a current output clamp, turn the dial to mÃ/Ã. Measuring Instruments Navigation. Digital meters, even True RMS ones, will not be accurate. The AEMC jaws contain two current transformers (CTs) and the LEM instruments are provided with clamp on CTs. Once this button is pressed, the clamp meter will change. The 117 includes integrated non-contact voltage detection to help get the job done faster. Now let us derive the. • A basic clamp meter, because you just need to ensure all three phases on your feeders are pulling the same current. This clamp meter offers true RMS for greater accuracy. Used with digital multimeters, voltmeters, or other voltage-measuring instruments. 200 amp main breaker 100 amps on each leg or 200 amps ? If you use a clamp-around amp meter, you will read approximately 110 amps on each leg at the main breaker. My experiences have been that you "might" get somewhat accurate readings, when the motor is running lightly loaded. The Leviton Mini Meter maintains it's readings in the event of power failure. If you aren't measuring current in the neutral conductor then you aren't doing it correctly. • Do not use the meter during electrical storms or in wet weather. For best results from your instrument and for your safety, read the enclosed operating instructions carefully and comply with the precautions for use. Make sure the clamp meter does what you need Fieldpiece meters feature large, blue backlit displays so you can always see what your meter is reading regardless of environment. How to read your natural gas meter. This must be remembered when using a power factor meter that reads cosθ, since the reading will not be valid except for pure sinusoidal voltage and current waveforms. Designed for quick checks and light duty use; 400 A AC only clamp meter; Make quick AC current measurements without disconnecting wires. This meter can measure AC currents up to 600 A, and AC and DC voltages up to 600 V. For an accurate reading, use a smart meter or a flash-counting monitor. How to read your electricity meter. You only need the first 5 numbers from left to right, not the last number which may be in red. The Southwire Smart clamp meter (MaintenancePRO Smart 1000A) is an 11-function, True RMS meter with great features. In order to not disrupt the flow of current within the circuit, ammeters are usually connected to the circuit in series. Clamp meters measure current, voltage, resistance, and continuity. A backlit LCD digital display makes the results easy to read. 99A ID: 574 - Put a current meter anywhere with this very handy display. reading on the LCD of the clamp meter is the insulation resistance value; if the reading is below 19MΩ, set the rotary switch of the the clamp meter and the range switch of the insulation tester unit to 20MΩ range position to increase the measurement accuracy. I had already ordered a clamp-type ammeter but when it arrived I found that it could not be used as a "clamp meter" except in the very high current ranges (like 40 amps or more). 8%, split core current transformers, ground fault current sensors, and rogowski coils Read More ». Consequently, the magnetic field around the conductor does not change and conventional clamp meters will register no reading. Confirm that the Envoy has measured the correct AC. One of the advantages of owning a Clamp Meter is the fact that you are able to measure the electric current that passes through a device without the need of breaking any circuits. HI guys, Can I use my AC Clamp ampere meter to measure DC current? or do I have to buy a DC clamp meter or AC/DC clamp meter. The function can also be used to offset readings caused by the residual magnetism remaining in the core for DC current measurements. Set the clamp meter to ACA mode by pressing DC / AC key. To obtain an ampere reading, you should clamp the jaws of the meter around two wires. 5 amp reading. • Before each use verify meter operation by measuring a known voltage or current. While DMMs are high-resolution, measuring in units like millivolts and milliamps, clamp meters will only measure to the nearest tenth or hundredth. To measure current you have to either have an amp-meter in series with the load; or use a clamp-on meter around a single wire that is passing current. The operating principle for this ammeter is identical to the clamp-on style of meter: the circular magnetic field surrounding a current-carrying conductor deflects the meter’s needle, producing an indication on the scale. A cap with a leakage current of only 1 microamp will throw the bias off by. Open spring-loaded clamp by pressing the jaw opening lever on the left side of meter. In the default setting, the instrument is in AUTO mode when voltage, current, RCDC (resistance, capacitance and diode with continuity) is being measured. MWA Technology is a leading supplier of turbine gas meters and ancillary metering equipment. It is the meter reading positive or negative, not electrons running backwards. You can also purchase a smaller Triplett 9200A AC Mini Clamp-On Meter from Amazon for under $35 or from a local electronics store. In this way, it does not respond to the current on the inner but only shows any current on the outside of the braid, which should ideally be zero. In contrast, with a clamp meter, current can be measured simply by. The average responding meter will not give a true reading if the current and voltage are nonsinusoidal due to non-linear loads. One more user concern is that the current reading clamp did not work properly on the meter. They're used primarily to troubleshoot electrical and HVAC systems. • Before each use verify meter operation by measuring a known voltage or current. *We don’t share your email. A built-in NCV tester adds even more convenience. The hand-held clamp meter that you listed measures AC current. Leading the way with innovative features that fit the way you work. Accurately measures voltage and current from both large and small loads: The Mini Clamp Multimeter is a compact and practical tool, accurately reading voltage and current when its jaws are clamped around any current-carrying wire. The meter is tracking the "peaks". How to read your meter. What kind of meter are you using?. Fluke makes a clamp meter accessory large enough to go around water pipes that plugs into your digital multi-meter. 5 amp reading. Squeeze the probes with a little pressure against the positive and negative terminals of the AA battery. The Hall Effect principal states that when a current carrying conductor is placed in a perpendicular magnetic field, the. Since the magnetic field produced by a wire is proportional to the current flowing through it, it is possible to measure the current indirectly by measuring the magnetic flux instead. Check the clamp to see if the max current reading has changed. Position the clamp over the live wire or conductor and release the clamp trigger to read the current of the particular conductor. • Do not measure current on a circuit whose voltage exceeds 600V. Find great deals on eBay for dc amp clamp meter and dc current clamp meter. Using a digital clamp meter is an uncomplicated and safe way to measure current in a circuit. Most true-rms reading clamp meters have crest factor specifications of 2:1 or 3:1. The grid current path does NOT include any power supply or anode current. - The meter has relative measuring function. Dwyer's multi-jet models are economical and dry dials. Setting this up in reality can be tricky with jumper wires. Connect the leads to meter input jacks. Digital Air/Fuel Ratio Meter User Manual This manual assumes that firmware version 1. Most multimeters also come with a range of standard accessories to accompany the device including test leads, clip cables and user manual to guide you through setting up and getting the most from your equipment. Choose the model that matches the jobs you do. It’s possible to get an inaccurate reading if you don’t use your meter properly. Set up your DMM as follows: To measure ac current with a current output clamp, turn the dial to mÃ/Ã. that power factor is not equal to cosθ in any other case [Figure 5 (I 3)]. If not, you should start by reading. Clamp meters open and close around a current carrying conductor and measure its current by determining the magnetic field around it, providing a quick measurement reading usually on a digital display without disconnecting or opening the circuit. In contrast, with a clamp meter, current can be measured simply by. The reason is that the physical injector opening shows only on the current waveform while the closing of it shows only on the voltage waveform. Home of the OWL Intuition System - Providing Smart Solar and Energy Monitoring and Analysis, and Smart Heating Controls. in the case of the overhead type unit. Shop for Clamp Meters and other test & measurement instruments at Instrumart. 5 amp reading. YOUR EDUCATION PARTNER. Inherit the water — It keeps going: 1 meter sea-level rise by 2300 is now inevitable Analyzing a longer timeline, even if we ceased emissions in 2030. You can also purchase a smaller Triplett 9200A AC Mini Clamp-On Meter from Amazon for under $35 or from a local electronics store. What did I do wrong? You can look up "clamp meter". Release the jaw opening lever. Digi-Test Pte Ltd, test and measurement company in Singapore, Hioki Singapore, Hioki, Fluke, Power Analyzer, Power Analyser, Power Quality, Infrared Camera, Thermal. Most clamp meters read a maximum value of 400 A. Get free 2-day shipping on qualified Clamp/Multimeter, Electrical Testers products or buy Electrical department products today with Buy Online Pick Up in Store. Similarly, on an oscilloscope this is known as “AC Coupling” since a capacitor effectively blocks any DC current from flowing. Read the black numbers from left to right – the black numbers represent kilolitres (1000 litres) and the red numbers represent litres. Press the clamp trigger located on the top left side of the device to open the clamps. (it's not reading 120v from an. An excellent tool for motor current measurement is the clamp-on ammeter (trade name Amprobe). MWA Technology is a leading supplier of turbine gas meters and ancillary metering equipment. Most multimeters also come with a range of standard accessories to accompany the device including test leads, clip cables and user manual to guide you through setting up and getting the most from your equipment. Test & Measurement are available at Mouser Electronics. no average value exists. Learn more. Also, for true RMS meters, there may be minimum current measurement limitations for some ac current measurements. What comes with the AquaPlumb Kit? It includes: a liquid sensor wire, controller board, power cable, water tight box, sensor wire end clamp. Dirt and residue on your skin can skew the results. in the case of the test point mounted unit, and 6 min. • When measuring volts do not switch to current/resistance modes. If not, you should start by reading. The clamp meter features a rotary switch, as well as 6 control keys, which respond to a brief or a long keypress. I understand that for AC clamp meters, a changing magnetic field induces a voltage/current in a wire loop and therefore it is possible to measure AC currents by induction. an ac clamp will not work. • When changing ranges always disconnect the test leads from the circuit under test. This Professional Clamp Meter measure both DC and AC with clamp it also has many functions for AC measurements including resistance, HZ%, capacitance and diode test,etc. Some Fluke clamp meters have a 1,000-A limitation with the fixed jaw and all have a 2,500-A maximum current measurement with a flexible probe. Do not attempt to clamp on to more than one wire or conductor at a time. Figure 14: Wattmeter To use the instrument, click on the Wattmeter button in the Instruments toolbar and click to place its icon on the workspace. But, if the area of a path for current is large enough, resistance can be quite low and the earth can be a good conductor. Note the reading you get with your circuit compared to the real value. Much has been talked about in recent months regarding higher electric bills with new digital meters. Shop for Clamp Meters and other test & measurement instruments at Instrumart. not found on clamp meters. Say the reading of meter is 11. It can be judged that detection with an electromagnetic flow meter is not possilbe. In our continuing effort to keep your account information safe, National Fuel has enhanced the security of online meter reading. Current clamps are not particularly good at accurately measuring very small currents. Conversely, if the needle does not move from ∞ at all, then there is no electrical conductivity. This will be the correct reading. When the clamp-meter reading drops way off, say below 220 mA. The reading for this meter would be: 07220.