UPDATE: DMCP-3.11 / DM42-3.11

This is where announcements of firmware updates for the DM42 calculator will be made
groenewe
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Joined: Sat Dec 02, 2017 10:49 am

Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by groenewe » Sun Oct 14, 2018 5:44 pm

My battery dropped pretty quick from 3.00V to now 2.85V and is stable now for 24 hrs contrary to my expectations and earlier battery consumption ( batery died within a month without using the calculator and on V3.00 software).

groenewe
Posts: 20
Joined: Sat Dec 02, 2017 10:49 am

Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by groenewe » Fri Oct 19, 2018 8:42 am

We're 5 days further and without using the DM42. I've checked today and we're at 2.83V. So at this rate the DM42 will be at 2.00V (not working) in about 2000 days. 0.02V per 5 days drop assumed. Guess this is worthwhile keeping an eye on still.

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Walter
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Location: Close to FRA, Germany

Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by Walter » Fri Oct 19, 2018 11:18 am

groenewe wrote:
Fri Oct 19, 2018 8:42 am
We're 5 days further and without using the DM42. I've checked today and we're at 2.83V. So at this rate the DM42 will be at 2.00V (not working) in about 2000 days. 0.02V per 5 days drop assumed.
± what? How about some error estimation?
DM42 SN: 00041 --- Follower of Platon.

HP-35, HP-45, ..., HP-50, WP 34S, WP 31S, DM16L

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ijabbott
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Location: Manchester, UK

Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by ijabbott » Fri Oct 19, 2018 1:40 pm

groenewe wrote:
Fri Oct 19, 2018 8:42 am
We're 5 days further and without using the DM42. I've checked today and we're at 2.83V. So at this rate the DM42 will be at 2.00V (not working) in about 2000 days. 0.02V per 5 days drop assumed. Guess this is worthwhile keeping an eye on still.
Do you account for temperature fluctuations?

groenewe
Posts: 20
Joined: Sat Dec 02, 2017 10:49 am

Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by groenewe » Sat Oct 20, 2018 3:21 pm

No error correction no nothing. Just a super simple high-level estimate. So let's see how the next month goes. Mildy and not using the DM42

groenewe
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Joined: Sat Dec 02, 2017 10:49 am

Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by groenewe » Tue Oct 23, 2018 1:18 pm

Down to 2.79V now per October 23rd. Did and do not use. Just switching on, checking the voltage in the top bar and switching off.

grsbanks
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Location: Preston, Lancs, UK

Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by grsbanks » Tue Oct 23, 2018 1:24 pm

groenewe wrote:
Tue Oct 23, 2018 1:18 pm
Down to 2.79V now per October 23rd. Did and do not use. Just switching on, checking the voltage in the top bar and switching off.
Wait a minute after switching on before reading the voltage. There is a power surge when the inverter that supplies the screen starts up, and there's also the keypress on the [ON] key.

The voltage is re-read when the clock flips over to the next minute. My DM42, for example, goes from 2.89V to 2.92V when this happens.
Not SwissMicros staff, just an enthusiast.

groenewe
Posts: 20
Joined: Sat Dec 02, 2017 10:49 am

Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by groenewe » Tue Oct 23, 2018 4:14 pm

Okay and that is good advice. Who more has experience with battery life? I mean un-, and re-screwing in a new battery every 2-3 months is not ideal to say the least. Also not mechanically.


btw... now down to 2.64V doing nothing but adding up some numbers.

Waited 2 minutes and dropped to 2.63V and the battery icon is at 3 bars (out of 6).

Another 10x times off-and on and now down to 2.51V. this is getting very nasty and I'd appreciate if the DM team comes up with a solution. Any tips on brand of batteries I should try?

Michael
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Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by Michael » Tue Oct 23, 2018 6:19 pm

Sorry to hear that.
Please contact me by email michael@swissmicros.com

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akaTB
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Re: UPDATE: DMCP-3.11 / DM42-3.11

Post by akaTB » Tue Oct 23, 2018 8:02 pm

groenewe wrote:
Tue Oct 23, 2018 4:14 pm
Okay and that is good advice. Who more has experience with battery life? I mean un-, and re-screwing in a new battery every 2-3 months is not ideal to say the least. Also not mechanically.


btw... now down to 2.64V doing nothing but adding up some numbers.

Waited 2 minutes and dropped to 2.63V and the battery icon is at 3 bars (out of 6).

Another 10x times off-and on and now down to 2.51V. this is getting very nasty and I'd appreciate if the DM team comes up with a solution. Any tips on brand of batteries I should try?
I wrote to the team and David asked me to make some measurements. After that he was able to compile a version (3.12 test) which I found stable energy-wise: after a week the battery recovered up to 2.92V after several tests flashing new and old firmwares.
Do as Michaels says: Pm to SwissMicros. If your issue is the same as mine a "cure" is already available.
Greetings,
    Massimo

-+×÷ ↔ left is right and right is wrong

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