Author Topic: Faulty BM235 Meter  (Read 481 times)

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Offline DrRunCMDTopic starter

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Faulty BM235 Meter
« on: September 07, 2020, 06:37:27 pm »
Hi all,
I have an issue which I not log ago posted in the comments section in video #884. There are a number of issues I noticed when I came to test a circuit:

When I noticed iffy values when I was testing the voltage drop of a 20 Ohm 2W TH resistor in series on a 12v PC fan circuit. Fan specs are 12v @ 0.23 A.
I noticed, the readout on the meter was not right, so I checked the output voltages on various supplies to rule out my bench supply being faulty:

Normal v (DC) auto-ranging mode:

30v Output = 2.759v
12v Output = 1.104v
10v Output = 0.919v
05v Output = 0.460v

High Impedance mode: all bang on output voltage.

Other strange issues:
1) When in normal V test mode, pressing range button 3 times causes the meter to alert saying 'Insertion Error' briefly then spazzing out.
2) When turning on the LED back light, the buzzer makes a strange beep.
3) Continuity mode just beeps with or without test leads connected.

There is more, but I will post a video shortly. My first port of call was the batteries, so I changed them out twice. No change in problems.
Similar signs of the meter that Dave took back with the strange rotating switch glitches.

LoZ mode on the meter seems to be the only mode that works without problems.

Any ideas or similar issues reported??
My firmware version is reported as '9' by the way.

 

Offline MiroS

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Re: Faulty BM235 Meter
« Reply #1 on: September 08, 2020, 09:26:06 am »
Hi all,
I have an issue which I not log ago posted in the comments section in video #884. There are a number of issues I noticed when I came to test a circuit:

When I noticed iffy values when I was testing the voltage drop of a 20 Ohm 2W TH resistor in series on a 12v PC fan circuit. Fan specs are 12v @ 0.23 A.
I noticed, the readout on the meter was not right, so I checked the output voltages on various supplies to rule out my bench supply being faulty:

Normal v (DC) auto-ranging mode:

30v Output = 2.759v
12v Output = 1.104v
10v Output = 0.919v
05v Output = 0.460v

High Impedance mode: all bang on output voltage.

Other strange issues:
1) When in normal V test mode, pressing range button 3 times causes the meter to alert saying 'Insertion Error' briefly then spazzing out.
2) When turning on the LED back light, the buzzer makes a strange beep.
3) Continuity mode just beeps with or without test leads connected.

There is more, but I will post a video shortly. My first port of call was the batteries, so I changed them out twice. No change in problems.
Similar signs of the meter that Dave took back with the strange rotating switch glitches.

LoZ mode on the meter seems to be the only mode that works without problems.

Any ideas or similar issues reported??
My firmware version is reported as '9' by the way.

Why you are nots ending it to seller for repair / replacement ? Brymen has good customer service .
 


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