Products > Test Equipment
New ANENG Q1 9999 Counts ?
wandows:
--- Quote from: Fungus on March 05, 2022, 01:09:17 pm ---
--- Quote from: wandows on March 05, 2022, 12:35:05 pm ---The batteries leaked a little
--- End quote ---
In other words: Something bad did happen. Why didn't you mention that?
It was a big oversight not to mention it, I'm sorry!
The PCB could be contaminated, the rot could even have got inside a component which would be difficult to fix. You could try scrubbing with IPA and a brush but at this price you're probably better off getting a new one.
Now it's complicated the situation
And don't use any more alkalines in stuff that goes long unused for long periods.
It was a big lack of attention, unfortunately!!!
--- End quote ---
Fungus:
--- Quote from: wandows on March 05, 2022, 01:29:41 pm ---
--- Quote from: Fungus on March 05, 2022, 01:09:17 pm ---And don't use any more alkalines in stuff that goes long unused for long periods.
--- End quote ---
It was a big lack of attention, unfortunately!!!
--- End quote ---
It's something we've all been through. :)
https://www.eevblog.com/forum/chat/durahell-batteries/
trobbins:
I have had two 8009's for nearly 4 years and I use them both a lot on the bench. There is a lot of convenience about a small battery operated DMM, especially when multiple realtime measurements are needed on a device and where some measurements are floating at hazardous levels. Mine remain accurate against 5-6 digit meters so far. The only growing inconvenience has been the zero level for resistance, where the dial switch resistance can be substantial and require a resetting of the dial to make a good zero level - that is not a show stopper for me as I am frugal with my test instruments and so just confirm the zero level if the application needs to know that zero is zero. I bought the two units when 8009's were cheap, with a full awareness of likely longevity issues, so have no regrets at all with their present operating condition. The only change to default operation is the use of different test leads and clips.
It would be interesting to know if anyone has been using the Q1 approaching that amount of time and has noticed degradation or inconvenience related to the relay's operation, or front panel switches, as those are likely the main difference between models and longevity.
floobydust:
My AN8008 is working fine after I used PPE contact cleaner (DeOxit) on the rotary switch. Before it was awful, high (zero) ohms readings, power cutting in and out. It's the crappy copper wipers oxidizing. I'd used oil, grease, teflon lube etc. but nothing lasted. Now it's around 0.15 ohms leads shorted in ohms-mode and consistent, reliable.
The little 8-bit MCU it's written in assembly language and minimal OTP or mask ROM memory, so I wouldn't expect the feature really needed- NULL or ZERO.
For the Q1, as always gold is expensive but necessary on signal relays. Hongfa HFD2/003-M-L2-D relay, "D" option is Ag+gold plated contacts, latching 3V coil.
So I'd expect gold on both sides and a bit of sealing, should beat a cheap rotary switch?
What I don't like about latching relays in multimeters is any bump knocks them to the other latching position, which can be a mess.
blueninja:
Can anyone post a firmware dump of this Multimeter? I believe I have messed mine up.
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