Author Topic: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?  (Read 2108 times)

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Offline inaxeonTopic starter

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Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« on: September 18, 2023, 07:42:26 pm »
Anyone got one of these? And more specifically, the RS-232 communications module option PM9190? They appear to be extremely rare.
Picture here: https://www.woutersenwouters.be/sites/default/files/styles/product_detail/public/product_pictures/PM%202525%20B.jpg?itok=gEwBXvAc

If so, a photograph of it would be highly appreciated!
 

Offline abeyer

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #1 on: September 18, 2023, 09:24:51 pm »
I have a 2535, though just looked and don't have the serial port (never really thought about it as the '35 had GPIB buiilt-in and I'd not even really noticed the panel for an expansion card)

I could possibly get pictures later, if that's useful without the serial, but would help to know what you're looking for, if so.
 

Offline inaxeonTopic starter

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #2 on: September 19, 2023, 09:10:00 am »
I assume that is the version which has the PM9191 GPIB interface combined into the mainboard? No need to send a picture, but... You are saying this unit also has the serial option slot?
 

Online wn1fju

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #3 on: September 19, 2023, 05:43:24 pm »
I have a PM2525 but, alas, it does not have any communications ports on the back panel, only a plastic cutout where something could populate the space. 

But that's OK with me.  Because I find the non-backlit display nearly impossible to read, the power switch inconveniently placed on the back panel, the 4-wire ohms function needlessly having to use the probe socket, the horrendous calibration procedure which needs to be done at two different temperatures, the rather bland specs, and especially the internal function selection switch which is run by a motor to be an example of how not to design a multimeter.  Of all the dozens and dozens of 4-1/2 to 5-1/2 digit DMMs I've come across over the years, this one is my least favorite. 

All my personal opinion.  Some people may not agree.  That's OK.


 
 
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Offline abeyer

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #4 on: September 20, 2023, 06:12:35 am »
I assume that is the version which has the PM9191 GPIB interface combined into the mainboard? No need to send a picture, but... You are saying this unit also has the serial option slot?

I'll qualify this with the fact that I've never actually opened up the case (picked it up on ebay as-is, expecting to have a repair project, but it just worked when I plugged it in.)

But, yeah, that's what it looks like from the outside. The GPIB is clearly integrated into the device and not a removable module as the connector is attached directly onto the back panel. There is also a blank plastic filler panel above that covering a space that seems to be the same size and shape as the picture of the serial card you linked above.
 

Offline abeyer

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #5 on: September 20, 2023, 06:19:12 am »
Because I find the non-backlit display nearly impossible to read, the power switch inconveniently placed on the back panel, the 4-wire ohms function needlessly having to use the probe socket

yup, have felt all that pain

the horrendous calibration procedure which needs to be done at two different temperatures

and glad I haven't worried about that one
 

Offline jchw4

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #6 on: September 21, 2023, 01:27:59 pm »
I have a PM2525 but, alas, it does not have any communications ports on the back panel, only a plastic cutout where something could populate the space. 

But that's OK with me.  Because I find the non-backlit display nearly impossible to read, the power switch inconveniently placed on the back panel, the 4-wire ohms function needlessly having to use the probe socket, the horrendous calibration procedure which needs to be done at two different temperatures, the rather bland specs, and especially the internal function selection switch which is run by a motor to be an example of how not to design a multimeter.  Of all the dozens and dozens of 4-1/2 to 5-1/2 digit DMMs I've come across over the years, this one is my least favorite. 

All my personal opinion.  Some people may not agree.  That's OK.

Could you (or somebody) show a photo of the magical "especially the internal function selection switch which is run by a motor" ?

I would love to see this but probably do not want to buy it  ::)
 

Online coromonadalix

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Offline abeyer

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #8 on: September 22, 2023, 06:34:56 am »
Could you (or somebody) show a photo of the magical "especially the internal function selection switch which is run by a motor" ?

I would love to see this but probably do not want to buy it  ::)

There's some passable diagrams and pictures in the service manual for the 2525: it looks like it's pretty much a rotary mode selector like you'd find on a handheld meter but with a gear to drive it rather than a knob. Also note I _don't_ think the 34 or 35 use that at all, it was just the 2525.
 

Offline GigaJoe

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #9 on: September 22, 2023, 09:56:39 pm »
i have PM2534
on the back EE09( com port) , label system21

sticker: (if it means something)
PM 2534/023
9447 025 34023
 

Offline Warhawk

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #10 on: September 22, 2023, 09:59:30 pm »
I have a PM2525 but, alas, it does not have any communications ports on the back panel, only a plastic cutout where something could populate the space. 

But that's OK with me.  Because I find the non-backlit display nearly impossible to read, the power switch inconveniently placed on the back panel, the 4-wire ohms function needlessly having to use the probe socket, the horrendous calibration procedure which needs to be done at two different temperatures, the rather bland specs, and especially the internal function selection switch which is run by a motor to be an example of how not to design a multimeter.  Of all the dozens and dozens of 4-1/2 to 5-1/2 digit DMMs I've come across over the years, this one is my least favorite. 

All my personal opinion.  Some people may not agree.  That's OK.

What a fantastic description. I too have one. To be honest. I want to keep it as a rarity. Even the noises it makes when you change the mode... Brilliant.

Offline inaxeonTopic starter

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Re: Anyone got a Philips multimeter PM2525, PM2535, PM2534 etc?
« Reply #11 on: September 25, 2023, 12:08:20 pm »
Cheers for the replies all. Main reason I was looking for it is because it was used in Philips professional television equipment, in some cases there is no way to configure it without the module and frankly I find the GPIB interface to be a pain in the backside.

I have managed to obtain the schematic and the code from the MCU/EPROM of the GPIB option (PM8547 a.ka. PM9191) -if- anyone is interested, but it sounds like there ain't a lot of love for this instrument.

https://github.com/inaxeon/PTV_Preservation/tree/main/PM5644/PM8547


« Last Edit: July 01, 2024, 02:39:28 pm by inaxeon »
 
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