Author Topic: Datron 4950 Multifunction Transfer Standard  (Read 23904 times)

0 Members and 1 Guest are viewing this topic.

Offline CalMachineTopic starter

  • Frequent Contributor
  • **
  • Posts: 477
  • Country: us
  • Metrology Nut
Re: Datron 4950 Multifunction Transfer Standard
« Reply #25 on: December 28, 2016, 01:33:21 am »
I'd also appreciate if you can upload full-size not small pics, so we can droll over the analog magic. More is more, not less. Pretty please. You can find my ftp in my sub.

I will most definitely do  :D
All your volts are belong to me
 

Offline CalMachineTopic starter

  • Frequent Contributor
  • **
  • Posts: 477
  • Country: us
  • Metrology Nut
Re: Datron 4950 Multifunction Transfer Standard
« Reply #26 on: January 03, 2017, 11:38:33 pm »
TiN, I've uploaded some pictures and even a few videos to your xdevs ftp server.  More pictures are to come as well!  I'm also still working on getting a copy of the firmware.

ftp://ftp.xdevs.com/CalMachine%20Datron%204950/

If you don't know how to log in, you can look to TiN's signature.  Follow instructions there
« Last Edit: January 04, 2017, 02:24:16 am by CalMachine »
All your volts are belong to me
 

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #27 on: January 04, 2017, 02:17:11 am »
the part number of the chip in datron 4950 which have firmware.

label                    part number               
401014               NM27C1010Q       
400902-1.1        GAL16V8
400904-1.1        GAL16V8 
400903-1.1        GAL20V8
Hope this will help, the programmer  I used is TL866CS. I try to read the PAL's ROM from 1271/1281/4920, but did't successful.
@CalMachine 
       
 
The following users thanked this post: CalMachine

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #28 on: January 04, 2017, 02:20:04 am »
the resistor array from alpha electronics.  and current shunt probably is VCS331 series.
 
The following users thanked this post: CalMachine

Offline CalMachineTopic starter

  • Frequent Contributor
  • **
  • Posts: 477
  • Country: us
  • Metrology Nut
Re: Datron 4950 Multifunction Transfer Standard
« Reply #29 on: January 04, 2017, 02:23:46 am »
the part number of the chip in datron 4950 which have firmware.

label                    part number               
401014               NM27C1010Q       
400902-1.1        GAL16V8
400904-1.1        GAL16V8 
400903-1.1        GAL20V8
Hope this will help, the programmer  I used is TL866CS. I try to read the PAL's ROM from 1271/1281/4920, but did't successful.
@CalMachine 
       

That will help a lot!  Thank you.  Yeah those little ferrite tops to those resistor arrays came off on ours too.  Only 1 was still on.
All your volts are belong to me
 

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #30 on: January 04, 2017, 02:36:46 am »
400903-1.0 (PAL20L8) from 1271 and 4920 is very hot when it is working, you can tell by the color of the label on the chip.

I want to backup the ROM of these PAL,  but looks like the 1.0 version has been encipher. :(
« Last Edit: January 04, 2017, 02:59:09 am by Pipelie »
 

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #31 on: January 04, 2017, 03:27:08 am »
more pictures about 400903-1.0  and vcs331.
 

Offline CalMachineTopic starter

  • Frequent Contributor
  • **
  • Posts: 477
  • Country: us
  • Metrology Nut
Re: Datron 4950 Multifunction Transfer Standard
« Reply #32 on: January 04, 2017, 01:41:22 pm »
More voodoo pics please. What's inside the metal shielded compartment? TVC?

I am going to work on getting some more pics today.  I'm not sure if I will be able to get pictures of UNDER the metal shield, but I know the AC Preamp circuitry resides under there.

This 4950 came with every schematic and parts list... so one day, I might get around to taking that to a copy/print shop and have it scanned in using professional equipment.
All your volts are belong to me
 

Offline TiN

  • Super Contributor
  • ***
  • Posts: 4543
  • Country: ua
    • xDevs.com
Re: Datron 4950 Multifunction Transfer Standard
« Reply #33 on: January 04, 2017, 01:44:39 pm »
That's wonderful. Perhaps you want to write an restoration worklog article about it? I'd be happy to sponsor one of X1801 preamp PSU boards for having that work done  ;)
YouTube | Metrology IRC Chat room | Let's share T&M documentation? Upload! No upload limits for firmwares, photos, files.
 

Offline CalMachineTopic starter

  • Frequent Contributor
  • **
  • Posts: 477
  • Country: us
  • Metrology Nut
Re: Datron 4950 Multifunction Transfer Standard
« Reply #34 on: January 04, 2017, 02:31:21 pm »
That's wonderful. Perhaps you want to write an restoration worklog article about it? I'd be happy to sponsor one of X1801 preamp PSU boards for having that work done  ;)

I am looking into this  :-+
All your volts are belong to me
 

Offline Echo88

  • Frequent Contributor
  • **
  • Posts: 821
  • Country: de
Re: Datron 4950 Multifunction Transfer Standard
« Reply #35 on: January 04, 2017, 03:10:52 pm »
Datron 4950 schematics would be greatly appreciated. I want to compare the DAC-section-schematic to the one in the Fluke 5700A already provided by TiN ( thanks again, learned a lot!  :-+ ).
 

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #36 on: February 19, 2017, 01:20:31 pm »
Things are shaping up well. but still have a lot of work to do....
 
The following users thanked this post: TiN

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #37 on: March 02, 2017, 03:58:59 am »
 :-DD
quick update:
now the unit is power up probably,  and running the self-test.
again,Thanks to CalMachine who share the firmware of 4950 with me!   without he is help this machine will sit in the corner for long long time.

PLD :
Chip                     firmware
GAL16V8D-25,    400902-1.0 
GAL20V8-25,       400903-1.0
GAL16V8D-25,    400904-1.0 
U103,U104:
chip                                  firmware
WINBOND  W27C010,       V2.8

« Last Edit: March 02, 2017, 04:01:07 am by Pipelie »
 

Offline ManateeMafia

  • Frequent Contributor
  • **
  • Posts: 730
  • Country: us
Re: Datron 4950 Multifunction Transfer Standard
« Reply #38 on: March 02, 2017, 04:11:33 am »
Good news!  :-+
 

Offline TiN

  • Super Contributor
  • ***
  • Posts: 4543
  • Country: ua
    • xDevs.com
Re: Datron 4950 Multifunction Transfer Standard
« Reply #39 on: March 02, 2017, 04:47:35 am »
Keep us posted  :-+
YouTube | Metrology IRC Chat room | Let's share T&M documentation? Upload! No upload limits for firmwares, photos, files.
 

Offline CalMachineTopic starter

  • Frequent Contributor
  • **
  • Posts: 477
  • Country: us
  • Metrology Nut
Re: Datron 4950 Multifunction Transfer Standard
« Reply #40 on: March 02, 2017, 05:27:11 am »
:-DD
quick update:
now the unit is power up probably,  and running the self-test.
again,Thanks to CalMachine who share the firmware of 4950 with me!   without he is help this machine will sit in the corner for long long time.

PLD :
Chip                     firmware
GAL16V8D-25,    400902-1.0 
GAL20V8-25,       400903-1.0
GAL16V8D-25,    400904-1.0 
U103,U104:
chip                                  firmware
WINBOND  W27C010,       V2.8

Fantastic!   :-+  Happy to hear.  Yeah, I'm not sure what was up with that first batch of firmware I sent you...  Glad the issue is resolved though.  I'm glad another one of these beauties gets put to use. 
All your volts are belong to me
 

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #41 on: March 02, 2017, 07:23:48 am »
:-DD
quick update:
now the unit is power up probably,  and running the self-test.
again,Thanks to CalMachine who share the firmware of 4950 with me!   without he is help this machine will sit in the corner for long long time.

PLD :
Chip                     firmware
GAL16V8D-25,    400902-1.0 
GAL20V8-25,       400903-1.0
GAL16V8D-25,    400904-1.0 
U103,U104:
chip                                  firmware
WINBOND  W27C010,       V2.8

Fantastic!   :-+  Happy to hear.  Yeah, I'm not sure what was up with that first batch of firmware I sent you...  Glad the issue is resolved though.  I'm glad another one of these beauties gets put to use.
there are 122 123 bytes data added by programmer,  67 bytes in the beginning,  55 56 bytes at the end of the firmware.
« Last Edit: March 02, 2017, 07:41:03 am by Pipelie »
 

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #42 on: March 02, 2017, 02:11:22 pm »
good news!
self-test done?and no error code revealed. :)   @CalMachine
the unit need calibration, but I don't known how to calibrate the unit yet. hopefully, it's as easy as 3458
 

Offline TiN

  • Super Contributor
  • ***
  • Posts: 4543
  • Country: ua
    • xDevs.com
Re: Datron 4950 Multifunction Transfer Standard
« Reply #43 on: March 02, 2017, 05:05:48 pm »
I think calibration of 4950 painful and tedious, as it's specification requirements are very tight.
Unless you don't really care, and choose to settle at uncertainty of no better than your standards.

I'm working calibrating 1281 now, and I can tell you, that's not simple plug and play  :).
YouTube | Metrology IRC Chat room | Let's share T&M documentation? Upload! No upload limits for firmwares, photos, files.
 
The following users thanked this post: Pipelie

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #44 on: March 04, 2017, 05:35:04 pm »

I spent a few hours on calibration yesterday, and turns out the calibration on DCV is easy than I thought.
equipment:
HP3458A
DATRON 4000
here is some data I got, I didn't finish the calibration yet, just trying and learning to do the best I can, base on what I have.
the result looks pretty good to me so far.

P.S.
does anybody known where to buy the connector of 4950, I don't have the input cable, and I want to build a cable by myself, but have trouble to find the connector on the market. 


 
 
 

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #45 on: March 04, 2017, 05:40:54 pm »
the connector of cable should be fischer 105 series , probably fischer S  105 series. not sure about that.

 
 

Offline CalMachineTopic starter

  • Frequent Contributor
  • **
  • Posts: 477
  • Country: us
  • Metrology Nut
Re: Datron 4950 Multifunction Transfer Standard
« Reply #46 on: March 04, 2017, 08:08:46 pm »
My boss randomly purchased this a few years ago for dirt cheap.  We weren't really sure what it was for... but since our acquisition of a 4950, it's come to light!  The calibrator output fixture fits our 4708, but not the 4808.  If you find a source for the connector, let me know!  I wouldn't mind crafting up a set or 2, myself. 

All your volts are belong to me
 

Offline ManateeMafia

  • Frequent Contributor
  • **
  • Posts: 730
  • Country: us
Re: Datron 4950 Multifunction Transfer Standard
« Reply #47 on: March 04, 2017, 08:16:11 pm »
The dual connector setup looks like you could connect a 4000(A) and 4200 to the 4950 for a complete calibration.
 

Offline CalMachineTopic starter

  • Frequent Contributor
  • **
  • Posts: 477
  • Country: us
  • Metrology Nut
Re: Datron 4950 Multifunction Transfer Standard
« Reply #48 on: March 19, 2017, 03:03:21 am »
the connector of cable should be fischer 105 series , probably fischer S  105 series. not sure about that.

How is your 4950 coming along?  Were you able to locate a source for these connectors?  If not, I'll start browsing around.

I'll post some results of our 4950's cal here in the next week or so.
All your volts are belong to me
 

Offline Pipelie

  • Regular Contributor
  • *
  • Posts: 172
  • Country: cn
Re: Datron 4950 Multifunction Transfer Standard
« Reply #49 on: March 20, 2017, 01:29:23 am »
Thanks for asking, Been a little busy this month.  The 4950 works great, except the ACV/ACI function, I don't have calibrator to calibrate  the AC function.  what calibrator you use to calibrate ACI and ACV? 4808?

I'm still have trouble to find  locate a source for fischer 105 connectors. I'm afraid I have to contact fischer to request for quote.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf