Megger MIT520/2 adjustment software?

JayTeeHaitch · Jun 15, 2022

I have a Megger MIT520/2 which needed a damaged terminal replaced. This seems to have affected the measurement and it needs adjustment to bring it back in. Megger were kind enough to give me the service manual but when I asked for the calibration software the manual refers to (part number 6111-759) , they told me the device was no longer supported so they couldn't give me that. It seems such a waste to have to tell my customer that they'll have to buy a replacement device for over $7kAUD because it's measuring 20% out.
Does anyone have this software or any information that could help me? Perhaps a more compassionate Megger rep that may be of help?

TechnikJames · Mar 1, 2023

JayTeeHaitch said:
I have a Megger MIT520/2 which needed a damaged terminal replaced. This seems to have affected the measurement and it needs adjustment to bring it back in. Megger were kind enough to give me the service manual but when I asked for the calibration software the manual refers to (part number 6111-759) , they told me the device was no longer supported so they couldn't give me that. It seems such a waste to have to tell my customer that they'll have to buy a replacement device for over $7kAUD because it's measuring 20% out.
Does anyone have this software or any information that could help me? Perhaps a more compassionate Megger rep that may be of help?

G'day, I have in for repair a couple of MIT520/2 Meggers (and one of the 10kV model), I can't help with the software, I'm trying to resolve a problem with breakdown trip when operating at 5kV (but up to 2500V and in burn mode it's fine). There's no reason your unit getting new terminals would put it out of cal, but without knowing the details, I guess more was replaced than just the terminal, which may mean there's a hardware solution. Is there any possibility of getting a copy of the service manual? Megger were less co-operative with me, jut an 'it's obsolete' response. Thanks, James.

JayTeeHaitch · Mar 2, 2023

The manual they sent me isn't actually for the MIT520/2, it's the MIT5XX/10XX series. They're definitely different, but they are similar, so it may be of use. I uploaded it here pdfhost.io/v/vyVHGee1G_Microsoft_Word_6172999i02_Service_manual_MITS1doc

TechnikJames · Mar 2, 2023

Awesome, thank you very much. I'll let you know how I get on!

TechnikJames · Mar 6, 2023

JayTeeHaitch said:
The manual they sent me isn't actually for the MIT520/2, it's the MIT5XX/10XX series. They're definitely different, but they are similar, so it may be of use. I uploaded it here pdfhost.io/v/vyVHGee1G_Microsoft_Word_6172999i02_Service_manual_MITS1doc

Happy to let you know I've been successful with both the 5kV Meggers, Megavar will need to send them somewhere for formal cal test (we just offer QA level testing locally). The 10kV is a different model, a MIT1025, and the 4th instrument is a DLRO10HD, so now I need to go back to diagnostics without a manual, but done well, thank you for your assistance. BTW, I repaired a terminal on one of the 5kV units, there's nothing there that can alter the calibration, so I'm not sure what the instrument you had got done to it. Best Regards, James.

mircado · Apr 7, 2023

TechnikJames said:
G'day, I have in for repair a couple of MIT520/2 Meggers (and one of the 10kV model), I can't help with the software, I'm trying to resolve a problem with breakdown trip when operating at 5kV (but up to 2500V and in burn mode it's fine). There's no reason your unit getting new terminals would put it out of cal, but without knowing the details, I guess more was replaced than just the terminal, which may mean there's a hardware solution. Is there any possibility of getting a copy of the service manual? Megger were less co-operative with me, jut an 'it's obsolete' response. Thanks, James.

peace upon you all.
i have the same problem of breakdown with MIT520/2 at 2500 and 5000 V insulation test.
did you fixed that problem

TechnikJames · Apr 9, 2023

mircado said:
peace upon you all.
i have the same problem of breakdown with MIT520/2 at 2500 and 5000 V insulation test.
did you fixed that problem

Yes, on both units. The small capacitors around IC2/2, LM339 'pop' detection circuit. on the measurement PCB. I don't know which exact capacitor, because after isolating the area of the cause of the triping I just replaced all the caps around it, and on the power supplies associated with it. So about $10 worth of low-voltage caps. A very economic repair, in hindsight. Hopefully yours will be similar.

mircado · Apr 10, 2023

do you remember its values

TechnikJames · Apr 10, 2023

mircado said:
do you remember its values

Sorry, no. I just looked at the PCB, wrote a list of the capacitors, ordered in equivalents from Element14, put them in and the fault went away. Those type of capacitors are so cheap, no point spending hours diagnosing which one was the fault.

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