Why did I have to use a separate pwr supply for the meter than the Switching Power supply that I was measuring? Would not work otherwise.
50760
Thanks...i used a small 5v USB charger and powered it from my switched AC source. I just don't see where anyone mentions you need an independent supply of 4 to 30 V to run the meter. I was planning to use the power supply I was building into a case with the meter to show voltage and current being used by the connected devices.
50761
I'm not sure in your particular instance what the problem was. In my case, I was hooking this up to a treadmill. As it happened at the point I was tapping into the system (power going to the motor) the amperage was too great for this device. I would have burned it out. So originally I used batteries to run it. I got tired of that solution and it occurred to me that a AC/DC switching power converter could provide the solution I was looking for. I found one on eBay and hooked it up to where the power came into the treadmill (before the motor board). I then used this as my power supply for this device and it works great. Perhaps something like that could work for you? It was only $9.98. In my case I was looking for something small I could install inside the treadmill. I was able to bolt it down in the same general area as the motor control board. I've been using this solution now for almost a year and have had no problems.
50762
You can use the same power source, but you need to "isolate" the power and ground from the soucre in order to properly isolate a ground loop of the current/ voltage readings. This can be accomplished by a bridge rectifier and or small switching supply in line.
1517800
Robert the only part that may help you is the power supply tester, part of your power supply may not be working even tho things power up. Martin
1396200
If it's only one strip, it will draw about 2amps so this meter will not read that accurately. Get one that has a built in shunt that will measure 5 or 10 amps and won't require the complexity of adding a shunt. Like this:DROK&reg: 0.28'' DC 0-100V 10A Digital Voltmeter Ammeter Voltage Current Tester Gauge Red Green Bright LED Display Five Wires Volt Amp Meter for Solar Battery Monitor Car Motor Panel Mount
1819044
It probably doesn't auto detect mulit-voltage sources. It's only using 110-120 volts.
896987
I like to offer a speculation: for the meter to do what you hope it will do, would require a more complex sensor and circuitry. If B&D; went through the trouble of providing that they have no incentive to keep their efforts a secret. There is no reference to this in the manual.
1828770
Alan,Wish I could help. After spending an hour with my Fluke I wasn't able to figure it out. I spent more than an hour (no joy) searching for the wiring diagram before resorting to the Fluke.I ended up using only the AC IN jack - bypassing both pwr switch and fuse.Kind of a bummer. Good luck, man.Steve
2162636
Sorry I never changed fuses in this meter. But I' will look & if I find out I'll let you know. Bill
353901
How did you try to measure 24 volts? If you used 2 twelve volt batteries in series make sure they were connected one + lead to the other - lead. Or try to measure 3 nine volt batteries snapped together. You should get 27 volts. I think there is a calibration pot on the back of the meter. It is very small and you will need a jewelers screwdriver to adjust it. Make sure the red lead goes to the + termingal of the battery. Try again and let me know. You could have a bad batch of meters. Mine worked very will on my power supply that goes up to 27 volts. One last thing...are the 24 volt batteries you are measuring good batteries? The meter might be telling you that they are not. Hope this was useful. Also be aware that all meters have a percentage of error. Some are + - .1% + - .01%. No matter how expensive the meter it will have error tho very small. The smaller the error, the larger the price. These cheap but beautiful meters are good enough for battery monitoring. I wouldnt use them to build a computer power supply.
890174
You may be using too small of a circuit, or a circuit that doesnt have enough excess capacity based on its current load. Try a different circuit.
56467
It is not connected to anything on the board. While in use I get nothing on my meter.
663933
In practice these things are pretty robust. As long as you do the adjustment while there's no output load (just your meter connected) and don't exceed the maximum rated input voltage, you're unlikely to fry it.EDIT: It sounds like one blew up on you, sorry to hear that. This is surprising to me, since the LM2587 has undervoltage lockout. I bench tested this for my application (dropping the input voltage until the thing turned off) successfully several times under 10W load.
284467
I used the one labeled "pwr in" AND has the Positive (+) and Negative (-) symbols
1087039
If there is no applied input pwr there will not be a converted output to 12 vdc. Connect converter to a constant input whether the switch is on or not.
1968256
with me with a input of 120 it would change from 110 to 120 and then back to 110 ,I needed a study out put of 110 for vacuum tbe HIF equipment, that is why it was returned. I now use a variac.
603200
Hi, Yes, you can use the meter power it and monitor it when connected to the same source. You can also have it be powered by another unit to measure something else. The input voltage ranges from 4.5 to 30 volts. Just make sure to not wire the unit backwards as there is no reverse voltage protection. Note that the brown (or black in some models) wire is the main (common) negative wire and the red wire is the positive power wire. The other color yellow (or white in some models) is the positive voltage measuring wire. For example, you would power the volt meter by connecting it to the brown wire to the negative terminal of the voltage supply and the red to the positive terminal of the voltage supply. You then would connect the yellow white to the positive terminal of whatever you are measuring to it and the brown wire to the negative part (you'll need to solder another to it to make a "Y" connection lead). Last remark, the little screw on the back of the unit allows you to calibrate the unit, you might want to compare and make changes to the unit with another volt meter you already know that is accurate as mine was off by 0.2 volts. I hope this helps!
656487
I don't know the difference between old and new current readouts ..... My unit uses current transformers
91611
Use a volt ohm meter set to continuity and touch the red probe to one prong and the black probe to the other prong. If the meter reads open or over load it is bad.