My meter want read over 999 or am I looking at the wrong ppm?
1396719
If the ppm is over 999 multiply the reading by 10. It'll say 'x10' in small type below the reading. 142 is then 1420.
1396720
FROM HM DIGITAL: The COM-100 will read over 999 in any ppm mode. The meter has a 3-digit LCD screen, so if it's over 999 ppm, you will see a flashing "x10" icon, indicating that the reading needs to be multiplied by 10 for the actual measurement. danK's example is correct - 142 with the "x10" icon is really 1420 ppm.
820492
you need to calibrate with solution to 1000 small screw driver hole in back of unit. good to go. if you want ec instead of ppm divide by 50 150ppm is .3 ec every 50 ppm is .1 ec.
1639039
I've had an issue with this also since the meter doesn't stop to take the reading. I place my hands on the handles and stop pedaling. the first reading is always high, and after about 30 seconds or so starts to go down. I usually go by the second or third number down. I think that's about as close as you can get -- just make sure you stop pedaling when you take the reading.
1917744
Use what you got :), I would start by having it hooked up and take readings with my VOM to compare all hookups to verify accuracy of all readings.
838171
I don't know. I don't see 7.2 on the meter either. I just use it to test AA, AAA, and other small household batteries.
530942
In the same mode my meter shows between 00.66 A and 00.71 A with no leads connected to the meter. Press and hold the Rel. ZERO button until you hear a "beep". This will reset the display to 0.I do not know why this meter cannot show 0 by itself with no load - it was designed to work like this. Not sure if better meters have automatic zeroing.
651897
The meter is faulty, mine shows full most of the time, when the batteries run out the meter shows its over half full. Return it and try a different brand.
1588100
Yes Larry, I checked your meter and it is a duo, if the meter says redi-code and nothing else like PLUS or another word they are compatible! Sorry I just saw your question!
239958
I have not had any problems with the meter, I am not sure what you are wanting to check the frequency of, but I use it on HVAC equipment and check frequency once in a while and it works for checking that.
142522
yes, meter does not work very well, used for about 4 months and never was accurate, stopped using
1950705
Yes I suggest you try a side by side test to make sure. You can contact their website with questions. I believe they make a meter also.
1026162
You must to read a little amount more than 1.5 or 9 volts. For example you can read 1.523 volts but if you read 1.42 the device is over
21284
What is the lowest level ppm that the unit you have can detect and display on the monitor?
1793666
Hold it near your computer screen and you should get some high readings or take it outside and hold it against your electric meter and if you are still getting 000 it may be something else because wants you turn it on and whole it near any and everything there produces electric and it should show you that it is working if not you know what to do on the return
1408566
I don't know. I use this for domestic applications only. I bought it because none of my old meters were Catagory 3.
394145
it does not measure 4-20 mA. I recommend use another meter available to measure mA
2175078
I don't know. Meter didn't come with instructions. I was very disappointed in the product myself.