Fluke 199C broken! Help to repair - Page 1
Forum section: electronics / repair

author: NicolaFabbri
author_rank: Contributor
timestamp: October 09, 2025, 06:10:38 pm
content: I have a practically new 199C oscilloscope that don't switch on. I have cheched the power supply and the battery (both running) but when I press power on button there is only a smooth beep and no more. Each time I press button it's possible to hear this sound.Any suggestion? There is some specific parts to check?Thank's for help.

author: giosif
author_rank: Frequent Contributor
timestamp: October 10, 2025, 08:03:27 am
content: From my limited experience, this is likely a problem with the keypad foil (a common issue with these scopemeters).Find the service manual and, in it, the probe pads mapping next to the connector the keypad foil goes into.Then, disconnect the keypad foil from the main board, and simulate a power button press (from memory, you need to short the corresponding probe pad to GND).If the scopemeter starts properly, then you have confirmation it is indeed the keypad foil.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 10, 2025, 08:51:41 am
content: No, if it's responding to the power button, keypad shouldn't be broken. It should turn on.If the device only beeps no matter how many times you press the power button, the firmware is corrupted.(memory module might be damaged.)can you record a video? what happens when you press the power button several times.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 10, 2025, 07:01:19 pm
content: There is a "beep" every time I push the Power Button!

author: NicolaFabbri
author_rank: Contributor
timestamp: October 10, 2025, 07:09:41 pm
content: Every time I press the button, I hear the buzzer, but the other buttons do nothing at all. Today I opened it up, and the sound is more noticeable.There is some way for reloading fimware?Where I can found it?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 10, 2025, 10:34:38 pm
content: The Fluke updater tool cannot be used when the scope is not powered on.Don't worry, There is a way to load it. I developed a tool to load firmware on the later 190II/Tek THS3000 models.but this tool operates under the condition that the hardware is functioning properly. it can only load the firmware.For the 190C, you need either the PM9080 or OC4USB to communicate with a computer. Do you have one?Oh, I forgot to mention— my tool is works with the 190C too.https://www.eevblog.com/forum/repair/fluke-199c-scopemeter-repair/msg5980543/#msg5980543

author: NicolaFabbri
author_rank: Contributor
timestamp: October 11, 2025, 09:00:36 am
content: Yes! I have one cable for Fluke 123, with RS232 port, I think it's the same.I really appreciate your help, I try in this day to follow the instruction, but I don't understand where I can found the firmware for my oscilloscope or if there is some specific version based on type (and revision). Can you assist me on this?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 11, 2025, 09:31:52 am
content: Connect the scope to your computer via the serial cable, then connect the power supply.While holding down the top and right buttons on the scope's keypad, then press the power button.You should hear a weak beep. this state is called UHM mode, like DFU mode.in this state, drag and drop the .cfg file onto the .exe.automatically dump from flash, creating a file.Modify the serial port setting in the config file to match your computer.first, whether calibration can be extracted.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 11, 2025, 04:24:02 pm
content: I'm not able to download your file, it's considered a virus... so no way to save!Very strange.But, it's not clear for me, with this first step what I do? I create a file from my flash memory? But what I understood is that there is some corruption on firmware.I'm confused....In UHM mode, can I send some command to see if it's alive?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 11, 2025, 05:06:31 pm
content: Neither Windows Defender nor VirusTotal detects any viruses.You should be able to download it.I was able to download it.https://www.virustotal.com/gui/file/bda0a30936adf78f5f813ce86e9a0b8f50d447f64ed7eec002633e59c2b28e8a?nocache=1You need to dump the flash data from the scope. The attached file includes the configuration and tools for dump the flash.if cannot dump the data, cannot restore the calibration constants, need to readjust it again.calibration constants can be restored, rebuild the firmware included with the Fluke updater, merge the calibration constants extracted from the scope, and write them back to the scope.in UHM mode, connect at 9600 baud, 8N1, then input a lot of "X" (uppercase, no other characters. Not even Enter.), it should return "0".Entering "id" will display the UHM mode version.UHM mode resides in the mask ROM area within the microcontroller, separate from the flash memory.Therefore, provided there are no issues with the microcontroller's peripheral hardware, UHM mode will always function.if something's wrong, SCMTool will return rhe error, so you don't need to check it yourself.if an error occurs, let me know!PS: if you're using a 32-bit machine, attached it.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 11, 2025, 09:33:41 pm
content: After a PC restart I was able to download the SMC_Tools, I have changed the port number to reflect my real com port (COM3) and then dropped the file CFG over the exe file.A Dos windows appears, but no answer from oscilloscope.I'm using a 64 bit machine with windows 11, can be this the problem?I press UP arrow and Right arrow and keeping this pressed, I press POWER ON on oscilloscope, I hear a beep, then I release power on and then the arrow.It's correct?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 12, 2025, 12:03:46 am
content: Yes.connect the serial adapter,connect the AC adapter, (also battery?)holding down the up and right arrows, then press the power button.you should hear a weak beep.if a beep sounds when you plug in the AC adapter,that beep might be the sound when entered UHM mode.try it without key operations?also clean the contacts of the memory module inserted into the connector.I haven't tested scmtool_32.exe, so if you're on 64-bit, use scmtool.exe.I'm using Win11 64-bit too.

author: asis
author_rank: Frequent Contributor
timestamp: October 12, 2025, 02:17:21 am
content: Hi,Quote from: NicolaFabbri on October 11, 2025, 09:00:36 amFirst, make sure the communication cable and any terminal program are working correctly.That is, install a mirror opposite the IR emitter and receiver (OC4USB) and, by manipulating its distance (very small), press any keys on the PC keyboard to get an echo replica in the terminal program, step by step trying all the listed connection speeds and RS232 port numbers.-Basically, many terminal programs indicate which RS232 port number will be used.Note that in the COM settings, the local "Echo" must be set to "off", otherwise you may be misled.

author: smaultre
author_rank: Regular Contributor
timestamp: October 12, 2025, 06:30:09 am
content: First step - connect\disconnect memory card for several times, without power and battery!, check for successful powering on every time.It's a very fresh modification of this scopes..

author: NicolaFabbri
author_rank: Contributor
timestamp: October 12, 2025, 07:08:48 am
content: Yes, work, not easy to found the correct position for the mirror but works.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 12, 2025, 07:10:04 am
content: Memory is located on a second PCB with a small connector, right?I have to disconnect and reconnect or also clean with some cleaner?

author: smaultre
author_rank: Regular Contributor
timestamp: October 12, 2025, 07:16:02 am
content: Quote from: NicolaFabbri on October 12, 2025, 07:10:04 amYes, small PCB re-connect it for several times.. No need to clean..

author: coppercone2
author_rank: Super Contributor
timestamp: October 12, 2025, 07:21:55 am
content: are you sure the batteries are good. With shitty alkaline C cells my old fluke scope meter does this. If I put NiMH in there which has high surge current it works OKLike I think it was rayovac C cells. Does not work at all on em. The voltage before power up is OK but it sags like mad when you try to turn it on and it like resets to off. So you just get a beep and no activity.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 12, 2025, 10:57:48 am
content: Battery is fully charged changed in January 2024, it's 7.62 V with no load, and with 1A of load is 7.44 V, so seem to be good.In any case I had the same problem with the power supply connected.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 12, 2025, 11:09:21 am
content: tried unplugging and plugging the memory module?

author: NicolaFabbri
author_rank: Contributor
timestamp: October 12, 2025, 11:14:26 am
content: Yes, 10 times...Without battery connecting power supply after a minute of delay, I heard a low tone, then pressing on tone is higher...Then, without disconnecting power supply sound still high in frequency

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 12, 2025, 11:28:43 am
content: mentioned earlier, can enter UHM mode by press the up and right, power button, 9600, 8N1, then send "X". tried entering UHM mode?Depending on the firmware corruption, it may already enter UHM mode when connect the power.

author: smaultre
author_rank: Regular Contributor
timestamp: October 12, 2025, 04:39:12 pm
content: If you can hear the higher tone, uhm, and firmware are ok and loaded, looks like a problem with power circuit..

author: NicolaFabbri
author_rank: Contributor
timestamp: October 12, 2025, 06:42:01 pm
content: Some GOOD NEWS!After many many try, restarting software and oscilloscope, today I was able to start a donwload, but unfortunately I think at 90% of job fail...I'm not sure it's due to a false-connection on power supply (yes, connector is not in good condition...), so file size is now arrived at around 14 Mbyte.I accidentally closed the dos windows, but if I remind correctly download arrived at DFxxxx.This frustrate me... but now I restart again the download and tomorrow morning I hope that there is no error.What do you think?

author: NicolaFabbri
author_rank: Contributor
timestamp: October 13, 2025, 06:07:28 am
content: After a night, download fail again at D7xxxxx circa.Now I try again to start download to see if stop at the same point or not, but if I remember correctly is around the same position of the first download.There is some way for download only the last part of the firmware to avoid to continue download the same part and then merge together?And what happen in case this part of firmware can't be downloaded? It's a memory corruption or what else?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 13, 2025, 07:10:53 am
content: Can you attach the dump file?

author: NicolaFabbri
author_rank: Contributor
timestamp: October 13, 2025, 08:36:17 am
content: This is the first one (yesterday)

author: NicolaFabbri
author_rank: Contributor
timestamp: October 13, 2025, 08:37:17 am
content: And this is the night version...

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 13, 2025, 09:04:59 am
content: dumped content is inconsistent before and after performing the work.likely due to hardware failure.attached a configuration file that dumps 3 times, up to 0xD7000.try it and attach the three resulting files in your reply.dont fogget the com port setting

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 13, 2025, 09:28:04 am
content: correct firmware has the first 16 bytes as 11 22 33 44 55 66 77 88 55 55 55 55 AA AA AA AA.The first attempt was completely wrong, but the second one got closer.There are two flash memories, each chip is 16 bits wide, and the microcontroller is 32 bits wide, so they are interleaved in 2-bytes into the flash.If only one side of the memory chip is faulty, it should be either two bytes incorrect, two bytes correct, incorrect, correct(opposite possible.)..... so it might not be a memory chip issue.Could it be a problem with the module connector?

author: voltsandjolts
author_rank: Unknown
timestamp: October 13, 2025, 09:36:24 am
content: Have the voltage rails on the PCB been checked, with a DMM and a scope?

author: NicolaFabbri
author_rank: Contributor
timestamp: October 13, 2025, 09:55:25 am
content: Not yet, I can check witha DMM and oscilloscope, but I don't know where I have to check. I have a PDF "Fluke 192-196-199 Service Manual", revision 2.0 of March 2000, I'm not sure that my PCB is similar with the one reported on this.What I have to check?In the same time I'm downloading the third version to compare.What do you think if I clean with Isopropilic Alcool the connector? Until now I have connected and disconnected to see if this solve.

author: asis
author_rank: Frequent Contributor
timestamp: October 13, 2025, 10:11:19 am
content: Check this out too...https://www.eevblog.com/forum/repair/fluke-199c-intermittent-noise-on-both-channels/

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 13, 2025, 10:13:18 am
content: Quote from: NicolaFabbri on October 13, 2025, 09:55:25 amthat is for 19x, not B/C.this one.https://www.lost-manuals.com/pdf/fluke--196c--service--ID6534.pdf(cant attach, 9.7kB)

author: NicolaFabbri
author_rank: Contributor
timestamp: October 13, 2025, 04:41:20 pm
content: FIRMWARE DONLOAD DONE!!I check the USB-Serial converter and found that there is some problem on Tx signal.. so, replaced with a new one and with this dowload start immediately and download all the firmware without stopping.Attached the firmware.And now?What is the next step?I hope firmware downloaded is ok...

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 13, 2025, 04:55:26 pm
content: close!but one of the data pins seems to be faulty. check the memory module again.three files should be generated. compress all three files and attach them.PS:a single bit remains stuck at 1 all the way to the end of the flash area, so this might be the reason it won't boot.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 13, 2025, 05:12:09 pm
content: Ok... I rejoiced too quickly... so, I'll try to disconnect the memory and redo the dump, let's see if those 1 reappear or not.But I don't understand how it can do 3 downloads, the .cfg file seems to do only one download and the program ends when it's finished!How can I do the other downloads?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 13, 2025, 05:15:06 pm
content: https://www.eevblog.com/forum/repair/fluke-199c-472371/msg6067577/#msg6067577

author: NicolaFabbri
author_rank: Contributor
timestamp: October 13, 2025, 08:22:13 pm
content: Download of first file is running... but one question, command in CFG is:-ed,1,dumpflash.bin,wbGB40000000,1000000That I think mean to download from memory addr 40000000 of 1000000 byte, but in the last cfg file where is reported to download 3 time the same area is:-ed,1,dumpflash_1.bin,wbGB40000000,40D70000Is it correct?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 14, 2025, 01:29:55 am
content: oh, yep, the error stopped happening.It's fine to change it to 1000000.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 06:16:28 am
content: I stop the task, and corrected to 1000000 but, checking the file downloaded during the night, I can see again that there is a bit that stuck at 1...So I think that also other download will be uncorrect.Unfortunately this dowload is to big for linking, 41 Mb that compressed is 13 Mb, I post a preview of first part.Let's wait this 3 download, if are exactly the same, but with the bit that stay high, what I can do?I cleen deeply the connector, and removed and inserted some time, can be a broken memory? Or a cold welding in the connector ?Looking the schematic seem to be ROMD24 bit that stay high, it's right?In the same PCB there is also some RAM module where we can check if work or not?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 14, 2025, 06:41:29 am
content: SM describes how to perform a RAM test.it can be executed by entering several commands.SRAM and flash share the data bus and address bus, if the issue is with the connector or other, it should be detected as faulty during the RAM test.if it isn't, then one of the flash chips is likely defective.entirely possible that the SRAM is damaged and lifting the data pin to HI.flash is a BGA package, cold joints are highly likely. Applying flux, heating it with a hot air, and gently shaking the chip might reconnect the joints.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 06:44:52 am
content: Perfect!I wait for the 3 download to have a "clear" situation, then I check the RAM to see if it's a connector problem or flash is not working, so next step is to use flus and heat gun for resoldering the IC.Do you know in the small PCB what is the probably fault? To avoid to heat all the IC...

author: asis
author_rank: Frequent Contributor
timestamp: October 14, 2025, 08:08:47 am
content: You need to use an oscilloscope to check for a pulse on the X3501 pin53 (ROMD 24) connector under some dynamic mode.It's possible that the BGA ball on the IC1 (F2) chip of the A201 module, or on the D-ASIC (T19) itself, has fallen off.It's also possible that the D2002 chip (pin3 "A0") is bypassing this bus.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 09:31:55 am
content: Perfect, today I wait for the end of download then I check with an oscilloscope but first I make a RAM check.If this work mean that there is no problem in connector, other wise can be a problem of DRAM or SRAM on this board, they can force this bit to high, correct?

author: asis
author_rank: Frequent Contributor
timestamp: October 14, 2025, 09:45:11 am
content: ....correction...

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 10:03:37 am
content: It's not easy to keep the optical link in position and in the same time checking the I/O...But one question, the check pin are available on the PCB under the rubber?

author: asis
author_rank: Frequent Contributor
timestamp: October 14, 2025, 10:41:52 am
content: There's no access to the connector contacts under the black insert.Just wait a bit, I'll try to point out the metallization point ("pad" ROMD 24, IC1 ball "F2") where you need to place the probe.-In the meantime, try running the memory check test; it's described in the documentation.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 14, 2025, 10:46:44 am
content: yep, as mentioned, you should run a RAM test. page 7-21, 147it will help determine whether the issue is a bus or a flash memory.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 11:44:15 am
content: First compare with file downloaded yesterday and the first of today, they are exactly the same...

author: asis
author_rank: Frequent Contributor
timestamp: October 14, 2025, 01:03:16 pm
content: With the A201 module removed, check the connection between pin53 (ROMD 24) and D2002 74LV543 pin3 (A0).Can you connect a scope probe there?

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 03:39:52 pm
content: Quote from: asis on October 14, 2025, 01:03:16 pmYes, tomorrow I do this test, then I return to you.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 10:24:16 pm
content: Files downloaded 3 time are exactly the same.I do the ram test and attached there is the result, my understanding is that memory test is done with no error, so seem that error is on SRAM.What do you think?

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 14, 2025, 10:29:26 pm
content: No, that command tests the SRAMs. flash is not tested.test shows that the SRAMs sharing the bus are fine. I believe the problem in the flash memory itself.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 10:53:30 pm
content: So or there is a problem in a SRAM pin welding, or module is broken.Tomorrow (now it's night!) I can try to heat the Flash chip to see if situation change, otherwise I have to found (and replace) one or 2 Flash memory.First question: I have definitely lost the calibration? And in case what happen?Second: It's possible to found a new Flash chip, I have not checked...Third: Before trying to reball the chip, there is no possibility to buy a new chip with all module ready?I have some experience with SMD device, but this type of work is always a nightmare for me....I can also try to swap Low and High chip to see if problem move.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 14, 2025, 11:02:44 pm
content: probably don't need to reball it. Just use plenty of flux, warm it up with a blower, and once it starts moving, a light touch.calibration hasn't been lost yet. problem is the missing bits.if calibration is lost, recalibration is required.memory module is unobtainium.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 14, 2025, 11:05:53 pm
content: So if flash is broken.. I can forgot my dream...No other hope?

author: NicolaFabbri
author_rank: Contributor
timestamp: October 15, 2025, 06:12:25 am
content: An idea of the night.Can I try to write a specific byte in RAM, for and read back for checking if work correctly?I don't know witch type of test is executed during RAM test.And then can I write a single byte in Flash memory and then reading back the value?For example the byte 0003 that should be 44 and now is 54, I can put 00, then reading back the result...It's a non-sense test?Before doing the rewelding job.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 15, 2025, 06:35:57 am
content: can do that. I'll create the config.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 15, 2025, 07:05:20 am
content: attached it. I've also made changes to SCMTool.exe, so use this one from now on.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 15, 2025, 07:15:56 am
content: try rewriting WB and RB.flash area cannot be rewritten by these commands. so, don't worrytest data might have been better as 0x00. I think it will not become 0x00. it will become 0x10.Code:SCMTool command:-tx : send X-po : print string-ps,x : pause x seconds-pd : print dumpinstruments command:WW<hexaddr>,<hexlength>,<hexworddata>WB<hexaddr>,<hexlength>,<hexdata>RB<hexaddr>,<hexlength>

author: NicolaFabbri
author_rank: Contributor
timestamp: October 15, 2025, 10:02:49 am
content: This is the result!Seem Write & Read are ok!

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 15, 2025, 10:14:49 am
content: @asisBoth the SRAM and VRAM seem fine.I think this is definitely a flash memory failure, right? but what's your take?

author: giosif
author_rank: Frequent Contributor
timestamp: October 15, 2025, 05:48:36 pm
content: I still suggest you try starting the scopemeter without the keypad foil connected, as I mentioned at the beginning of this thread.I have one 199C which had the same behaviour, and it was due to the foil.I am not saying this is 100% your issue as well, but you can give it a try (and you are not risking anything by trying it).

author: asis
author_rank: Frequent Contributor
timestamp: October 16, 2025, 04:41:38 am
content: Hi,@squadchannelLet's first check the serial numbers on the back cover of the scope with the FRAM dump.

author: asis
author_rank: Frequent Contributor
timestamp: October 16, 2025, 05:18:34 am
content: If it were a single bit error, it should manifest itself throughout the entire array.-There's a suggestion on the forum for making a reader, but it's expensive and perhaps unjustified.-When I was working on the A201 module, to avoid losing or damaging anything,I reverse-engineered it without desoldering anything and restored the connections hypothetically (there's simply no other way).The goal was to read the contents of the FLASH RAM.Then, I acquired two connectors and made an adapter for the programmer.By moving the module from one connector to the other, in two steps, I was able to read the full contents of the FRAM.https://www.eevblog.com/forum/testgear/fluke-192-196-199-fw-upgradeYou've made significant progress.If the OP has a programmer that reads SST39VF800A, then the presented circuit can be used.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 16, 2025, 09:50:32 am
content: Quote from: asis on October 16, 2025, 04:41:38 am9710418 or 971(space)418. There's no way there's space, so it must be the first.Quote from: asis on October 16, 2025, 05:18:34 amentire arrayscope firmware version is V7.06. compiled date? matches. size too.Quote from: asis on October 16, 2025, 05:18:34 amI used a TL866II to read the SST39VF6401B used in the THS3024, but an adapter was required. It seems an adapter is also needed for the SST39VF800A.I'll design an adapter for the A201 module to match that adapter, but it depends on whether@NicolaFabbrihas a programmer and what programmer is.

author: asis
author_rank: Frequent Contributor
timestamp: October 16, 2025, 11:27:34 am
content: What is the next step?Warming up the ThermoFlo module?

author: NicolaFabbri
author_rank: Contributor
timestamp: October 16, 2025, 02:22:33 pm
content: Ok,Yesterday night, I try to heat with air flow soldering station just a little the IC1, but I obtain that it move from original position, so now I can't more read both FRAM.Yes.I'm searching on my country if there is some one with a professional reballing station but no one has, I ask now online but I have for now no answer....I'm in Italy.Can some one take my card and try to reball the IC? (both...)Or I have to say bye bye and sell this oscilloscope as spare parts?Very unhappy of my job. I have experience soldering SMD, but never with BGA, I assume was similar but I'm totally wrong.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 16, 2025, 02:42:31 pm
content: Well, that happens sometimes.members living in Italy, someone repair his memory module!Or should we try rebuilding the memory module in a TSOP package?

author: asis
author_rank: Frequent Contributor
timestamp: October 16, 2025, 04:18:02 pm
content: Experience...........I like this guy.I've been watching him for a long time.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 16, 2025, 04:39:35 pm
content: Yes, seem easy to see... I have some tools... but now I don't want to risk.If there is some one that can try for me, I really appreciate!!I hope there is some one from Italy (near Bologna??) that can support me in this.

author: NicolaFabbri
author_rank: Contributor
timestamp: October 16, 2025, 09:44:54 pm
content: Found a laboratory where they can do the job.Let's wait for the reballing then I return to this topic.In any case, if this don't solve, I probably found some Flash memory on ebay, so I can try to buy and put on, but then, what happen with the calibration?If value are not perfect... it's not a problem! Or I have some other instrument to try to calibrate, in case.It's possible?There is some software tools for calibrating and saving the data?