Klein CL800 Meter

nickdearing88nickdearing88 Registered Users Posts: 86 ✭✭✭
I was doing some re-wiring in my old house basement the other day and accidentally measured AC voltage with the meter set to Amps. It was dark and thought the dial looked like is was in the wrong place and quickly changed it.

Could I have done any damage or caused mis-calibration to the meter? It appears to be working correctly.
Current test system: 4-100w Renogy panels mono/poly, 1 string of 4 panels in series - 24v 100Ah AGM Battleborn LiFePO4 batteries - Morningstar MPPT40 CC - 1500W Samlex PSW inverter

Comments

  • BB.BB. Super Moderators Posts: 26,768 admin
    Depends on meter and sometimes the settings.

    My old/cheap meter has a fuse for all amp scales except 10 amp [no fuse, direct connect].

    It is hard to say if all is ok, ok for now and will fail later, out if one or more scales are out of calibration.

    Did you notice any sparks?

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • EstragonEstragon Registered Users Posts: 1,430 ✭✭✭✭
    edited August 24 #3
    I did the same thing with a cheap meter. The leads got hot pretty quick, so wouldn't rule out damage to them. So far, it agrees with readings from other meters, so I still use it.
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • nickdearing88nickdearing88 Registered Users Posts: 86 ✭✭✭
    BB. said:
    Depends on meter and sometimes the settings.

    My old/cheap meter has a fuse for all amp scales except 10 amp [no fuse, direct connect].

    It is hard to say if all is ok, ok for now and will fail later, out if one or more scales are out of calibration.

    Did you notice any sparks?

    -Bill
    No sparks. I would say it was only about 2 seconds before I realized. The manual says "....always remove test leads prior to measuring current with the clamp, and I always do. I just happened to be in a rush and made a mistake.

    Estragon said:
    I did the same thing with a cheap meter. The leads got hot pretty quick, so wouldn't rule out damage to them. So far, it agrees with readings from other meters, so I still use it.
    It was very affordable from Amazon but doesn't seem to be "cheaply" made. I purchased based on a forum recommendation and it was a great choice without the Fluke prices. I didn't notice any heating but I assume because it was so short a time. What caught my attention was the unusual "voltage" reading while on the Amps setting, about 20v AC. The funny thing is I discovered a "leaky" light switch and when re-tested with another multimeter, it was allowing about 20v AC to pass through despite the switch being off, proper line voltage with the switch on.

    Of course, I'll be replacing the switch next.

    Thanks for the responses.
    Current test system: 4-100w Renogy panels mono/poly, 1 string of 4 panels in series - 24v 100Ah AGM Battleborn LiFePO4 batteries - Morningstar MPPT40 CC - 1500W Samlex PSW inverter
  • mcgivormcgivor Registered Users Posts: 1,208 ✭✭✭✭
    Since the ammeter is not an inline but clamp on, it would be unlikely that any damage would have been caused,  most inline meters have a fuse to protect itself, leads etcetera, with  cheap economy models who knows. The mystery 20 VAC leakage from the switch is probably not really there, digital multimeters have high input impedance, giving the impression something is wrong, put a load across the conductors and it will dissappear.
      1500W, 6× Schutten 250W Poly panels , Schneider 150 60 CC, Schneider SW 2524 inverter, 8×T105 GC 24V nominal 

  • BB.BB. Super Moderators Posts: 26,768 admin
    I agree--If it is a clamp meter, you probably did not do any damage to the meter when set to current mode while measuring current.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • jonrjonr Solar Expert Posts: 845 ✭✭✭✭
    edited August 25 #7
    My neighbor recently called me to diagnose about 20 VAC on a disconnected line.   As mcgivor says, it's induced voltage and should be ignored.
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