Weir 413D linear PSU: usage? - Page 1
Forum section: electronics / general

author: eti
author_rank: Super Contributor
timestamp: January 07, 2022, 07:46:00 am
content: I've just bought this beautiful Weir (Farnell?) 0-30V (-15-0-+15) linear PSU, fully working and in beautiful condition. However, the button in/out combinations are a bit cryptic; does anyone know what this all means, and what the top two button do? (to the right of the meter) - thank you.The image is the correct orientation here, but sideways on the forum; apologies.

author: Refrigerator
author_rank: Super Contributor
timestamp: January 07, 2022, 10:03:03 am
content: The two combo switches on the top set the meter range, 30V or 10V, 2A or 6A range.The switches below look like they just select transformer taps.Here's the manual, i've haven't yet read through rather than just glanced at the schematic at the end of it.https://www.testequipmenthq.com/datasheets/WEIR-413-413-Datasheet.pdfAlso i think this thread belongs in the test quipment section.

author: eti
author_rank: Super Contributor
timestamp: January 08, 2022, 02:41:10 am
content: Quote from: Refrigerator on January 07, 2022, 10:03:03 amThanks ever so much. Yes, I didn't put it in the "Test equipment" category, however, as I didn't think a PSU was a device which tests anything, in itself.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: January 08, 2022, 06:23:47 am
content: I read it as follows:The lower group of switches selects the actual power supply range, the upper switches select the range of the meter.In itself, a strange unit.

author: Gyro
author_rank: Super Contributor
timestamp: January 08, 2022, 08:39:10 pm
content: Yes, Weir liked their multi output voltage range switching (I used to have a Weir Maxireg 761 with 15V/30V range switch). Just take extra care not to push the wrong range button with a circuit connected!Good solid PSUs though, I never even changed a cap.

author: eti
author_rank: Super Contributor
timestamp: January 09, 2022, 01:21:03 am
content: Quote from: Gyro on January 08, 2022, 08:39:10 pmIt's a really beautiful, classic design and layout inside. I've just been taking photos of the internals, meticulously; a thing of beauty, it will still be working in another 40 years I'm sure.

author: eti
author_rank: Super Contributor
timestamp: January 09, 2022, 03:17:17 am
content: One thing I can't work out is which VR to twiddle to get the meter calibrated. I have to increase the knob to make the analogue meter show 1V more, to get the actual voltage (measured on a dmm). For example, if I want 10V output on the 30V range, theanalogue, integral meter will say "11V".I have read the calibration procedure in the PDF, but it's as clear as mud.

author: Refrigerator
author_rank: Super Contributor
timestamp: January 10, 2022, 09:08:12 pm
content: Quote from: eti on January 09, 2022, 03:17:17 amAccording to the manual i've found it's RV4 but the manual you included is differentAlso don't forget to adjust the needle spring in the meter.

author: eti
author_rank: Super Contributor
timestamp: January 10, 2022, 11:15:29 pm
content: Quote from: Refrigerator on January 10, 2022, 09:08:12 pmThanks ever so much, Happy New Year