"Number of Times Temperature Limit is Applied"

I see this in the panasonic pc information viewer for my cf-30. it marks 11 times that it has been applied. my cf-19 which gets much hotter to the touch is at 0. anyone know what it means.
Is my laptop overheating or something. I don't notice any strange behavior.

 

Hmmm.. Mine shows 0... I don't know if I would be alarmed... They are made to go into "High Temp" status and limit the CPU to 80% speed until the temps drop back down... Perhaps TBTech29 can clarify....

 

yeah I'm not too worried. I've had my CF-28 in 100 degree weather running my cnc machine not counting the humidity and it never stuttered. I am just curious what it means exactly? what is it documenting overheating, stepping down the processor? what?

Oh yeah, I just noticed it last week it showed 2 and I was like hmmm okay. and now it has done it, whatever it is, 9 more times.

 

thats weird mine says 0 but my case is bent and sometimes doesent contact the processor and I have had it go to 200 degrees on me.

 

I believe Toughbook is correct. I have not seen this my self but it sounds like its just how many times the cpu has been throttled due to temp.

 

This does seem like a signifigant jump, 2-9 times in a short period after a long time of using it without issue.

Is this data stored in the BIOS, the HDD? I'm curious if it's cumulative over the life of the machine?

I'll check mine when I get home tonite to see what it says.

 

the thing is it has not been in a hot environment yet, spring is starting in houston. used inside in an airconditioned office sitting on an old steelcase all metal desk. the desk is always very cool to the touch so i figure that is like an extra heat sink,lol. and yeah where is the data stored? I assume bios it has about 4mb to store including that crap absolute software.

my cf-19 has been left on playing netflix under a cover for about 2 hours (blame my niece) and that thing was frikking hot when I pulled it out. yet no event in the log.

 

:-D

:-D Funny

 

That limit is there to protect the battery.

When the internal temperature hits the high temp limit, the battery is automatically discharged to 80% of its capacity. The reason for this is that Li-ion batteries rapidly degrade when they're stored or used at high temperatures.

The BIOS in the later Toughbooks let's you manually toggle the high temperature mode. This is a great feature if you mainly operate your Toughbook from the charger as keeping a Li-ion battery at 100% charge for long periods will quickly reduce it's life-span.

When you enable the high temperature mode, Windows will still show a charge of 100% but when you check the Panasonic system info tool you can see the battery capacity has been reduced to 80%.

 

Do you ever leave your Toughbook in your car? It will easily reach the high temp limit on a warm day.

It doesn't matter if the Toughbook is turned off.

 

nope like I said air conditioned office and spring is barely starting, mind you in the next couple of months it will be in high temps as I move it around the shop. I switched my bios from auto to high temp mode to see what happens..

could it have anything to do with having a media bay battery?

 

The media bay battery doesn't seem to affect the internal temp. I have one in my CF30 mk2 and it has never reached the high temperature limit.

Your system might have been cooked a few times before it reached you. All it would take is a couple of hot days in a truck or warehouse.

 

I checked my CF-30 and it shows 0. I know it has been really hot once when my wife threw a jacket on top of it in the back seat when we were in the high desert and I was using a remote touchscreen for navigation. I was really worried when I touched it, it was really HOT! It seems none the worse for the wear. I usually keep it set on high temperature so the batteries only charge to 80%. I have seen the green charge light flash a few times when the computer was discharging the battery due to high heat.
CAP

 

Very good thread... I have noticed the exact same situation. My 30 MK2 has seen some very, very hot temps. My MK3 has not been subjected to any temps like my MK2. However, my MK3 shows 11 times overtemp?

When I 1st noticed it, it was at 5. Like the next week it was on 9. In that time period I know for a fact it was not in any heat.

 

interesting mine is an MK3 also. and when I got it it had 60hrs use and 0 times on the limit applied counter. Like I said no high heat or anything. If anything it has been babied since it was so nice and new.the CF-19 has been way hotter and it reads 0. Could it have something to do with the MK3 or how windows 7 is on an MK3. i ask because my CF-19 is MK2 running win 7 and no problems.
This is recent and the only change has been switching to Win 7.

 

From the horse's mouth....

 

the question is why is it being throttled. this laptop has not been in an environment over 70 degrees. I have not used it outside, in a car, under covers, etc. it has spent most of its time on that big metal desk I mentioned earlier. This is recent also like within the last two weeks or so.

The only change has been installing windows 7. I've had for a few months now and that is the only variable. Also have we determined where the data is stored. If it is on the HDD then it could be a software issue. If it is in the bios, well then I don't know.

I installed coretemp and reading are between 39 and 48 degrees with a a max of 54 degrees. this was while runing half-life, having a youtube video playing and playing an iso movie I had ripped all at the same time. Does that seem normal.

edit forgot to mention i ran this outside it was about 80 degrees on the hot hood of a car trying to get it to overheat. i am going to download some stress test programs to do better test. this was quick and dirty.

 

Well i have been running a few stress tests such as prime 95. for a an hour or so cpu hitting 100 percent usage both cores maxed. max temp reached is 77 C degrees. That is still about 28 or so degrees from when intel heat throttling is supposed to kick in.
I checked PC information viewer still at 11. if anything it should have gone up. because all I have been doing on this laptop is music, invoice software. some light cad editing. nothing taxing at all in an air conditioned office.
Weird how me and Toyo both have MK3 and both at 11.

This goes to 11!

 

I had problems with the CPU temperature of my new CF-29 MK4. Some days after I got it, I installed Notebook Hardware Control, which is also capable of reading out CPU and HDD temps (and some other stuff). CPU temp ist displayed in the system tray, so it's always visible. After installing, CPU temp was at about 50 - 55°C, which I though was ok. Later I converted some videos for about 15min which gave the CPU 100% load. I watched to the temperature display and it said: 104°C top!!! I stopped the video converter, and the temps dropped very fast to about 70°C.

104°C ? That couldn't be right, ha, even when the Intel specifies he CPU for 100°C? So I opend the back of my CF-29 and found a total hardened, crumbling heat pad (or how they are called in english) on the CPU and the Chipset. So I bought new ons at the bay (1mm thick) and also some thermal conductive paste. I installed new strips of the pad under the heatpipes (where they get the heat to he housing) and also filled the grooves, where the pipes are sitting, with thermal paste for additional contact surface. After installing new pads on CPU and chipset, max temps at over 30mins of 100% CPU load (in room temperature) are about 72°C. That's a difference. But: Is this temp ok for a CF-29 with 1,6GHz?

 

Do you KNOW this and can you show me where it says this. It makes perfect sense.... But I had always read that it limited the CPU to 80% capacity so as not to generate too much heat in a high heat situation. But then the battery idea makes sense too... I try to keep mine unplugged every now and then... Wear the battery down and then charge it back up...

 

I remember reading this when I first got my CF-30, though I've never used it.

From page 17 of the CF-30 Mk2 Reference Manual:

High temperature mode
The high temperature mode can prevent the battery from deteriorating when the computer is used in high-temperature environment
or used for a long time with its battery fully charged.
Select [Auto] (default) or [High Temperature] in [Environment] of the [Main] menu of the Setup Utility (�� page 62).
NOTE
�� Note that a level corresponding to a 100% charge for high temperature mode is approximately equivalent to an 80%
charge level for normal temperature mode.
�� After switching from [Normal Temperature] to [High Temperature] or vice versa, the remaining battery capacity will not
be displayed correctly until the battery pack is completely discharged or fully charged.
�� In the [Auto] mode:
Once the computer has automatically switched from the normal temperature mode to the high temperature mode, the
computer will not switch back to the normal temperature mode until the battery has been used and recharged to a total
charge level of about five times as much as that of the fully-charged state. This is to avoid battery deterioration.

Glen

 

Yep - it is in the user manual as above. It is also in a PDF file called "Important Tips" which can be found at

Start > Program Files > Panasonic > On-line Manuals > Important Tips

Here is the information from page three (the [1] [2] [3] [4] markers are for footnotes):

 

Excellent.... You just taught an old dog a new trick.... You know I've read that file a thousand times but I guess I saw only what I was after.

Good job! Rep to you! (Both!)

 

is this the same thing though? I know about the high heat setting for the battery, but does it kick in automatically? I thought you had to set it yourself in BIOS. Which still begs the question why was it applied. The computer has not once been in a temp above ambient 70C. I could understand if I was in the un air conditioned part of the shop in summer, but we are barely getting warm weather here. Even the un-air conditioned part has been cool.

 

Is your Win7 setup using the Panny restore disc or retail plus Panny drivers?

Glen

 

Panasonic Vista restore and then upgrade to Win 7

 

I wonder if it might act different with a restore from the Panasonic Win7 restore disc. Of course, that's Win7 Pro 32 bit. Not sure if that's what you have or want. If you wanted Ultimate, you could upgrade from Pro.

Glen

 

The high temperature setting cannot be disabled. It either kicks in automatically, or it is always on.

It's a great feature. It helps to prevent damage to your battery.

Your system has been above the high temperature limit. I can think of a number of ways this could happen e.g.

1. It may have happened before you received your unit.
2. The unit was put in a carry bag while it was still operating (by default, closing the lid does not put a Toughbook to sleep)
3. A coat or racket may have been placed over it.

Perhaps another reason altogether. But be sure, there is an explanation.

 

1. nope temp limit was at 0 when received
2. never use a carry bag what with the handle and all
3. nope on that either.
believe me I have tried to think of some time it might have been hot. it goes in my car to my desk, back to the car and to my desk at home.
by the way I stuck in my caddy with windows xp in yesterday and it showed the same. so it is stored in bios.

 

Do you put it to sleep when you travel?

As I mentioned, the default behavior for when the lid is closed is to turn off the screen backlight but leave the system running.

 

nope i disable sleep and hibernate on all my pc's. I fully shut down for traveling.

 

If it running right... Don't worry... Or you could call Panny.

Since I leave mine plugged mostly.. .I have gone into the BIOS to go for high temp.

I have received some 29s in the past that I assumed came from police depts and they had the high temp switch tripped.

But is that saved in the BIOS or would a reformat wipe that clean? Anyone know fo sho?

 

It is saved in the NVRAM and can't be reset with a reformat (even a BIOS upgrade doesn't reset the counter).

It's similar to the hours counter and the temp min/max counters.