Does anyone know of an outfit that has a proven track record repairing the older Datron 4700 calibrators?
I'm mainly interested in someone who has successfully repaired and returned these to in-tolerance condition in the past.
Try:
Low Thermal Electronics Mailing Address:
Low Thermal Electronics, Inc.
P.O. Box 210
Itasca, Texas 76055
254.687.9700
254.687.9701 fax
General and sales inquiries contact:
sales@lowthermal.com
Dock ship-to address for all service:
Low Thermal Electronics, Inc.
2612 FM 66
Itasca, Texas 76055
254.687.9700
254.687.9701 fax
Service inquiries:
service@lowthermal.com
Here at ENI Labs we have are capable of repairing and calibrating a Datron 4708.
www.enilabs.com
Thanks for the input. The instrument has been repaired.
So what ended up being wrong with it?
M1 in the +/- 38V power supply was breaking down when the unit was set for >100 volts on the 1000 volt range.
It was giving "fail 8" (38V supply) or OL consistently and since replacing that IC the malfunction cannot be duplicated.
Good to hear it wasn't anything major!
Yeah, these units are amazingly reliable but repair and especially realignment is tricky.
I do have the users handbook and calibration/servicing handbook vol 1 and 2.
I'm actually about to go through the AC realignment procedure on our 4708 that just came out of repair. This will be the first time I've had to perform it. We purchased a nice inductive voltage divider to use with it. I've been looking for a place to get an accredited cal with correction factors... do you know of any?
For an accredited cert for that model I'd have no particular preference.
If you need data you're going to use and rely on I'd recommend Low Thermal. I believe they can perform the alignments as well. Not sure if they are accredited.
I'm sorry, I meant a cal of the inductive voltage divider / precision ratio transformer. In particular, it is the ESI PRT73 with the 2.5V/Hz option.
I looked at the Army Primary Standards lab scope of accreditation and even they only go down to 400hz for AC ratio.
ESI should be in the best position to refer this cal.
I tried Tegam earlier this week. The acquired ESI's Resistance and Impedance lines back in the 90s. Unfortunately, they told me they did not support the product and did not know of any vendors that did. I just reached out to ESI