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Yokogawa WT1600 Digital Power Meter

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www.MKRD.info:
My Purchase Order Request was approved, my purchasing guy should be buying this soon.
Is Instapak secure enough to travel all the way to USA? Can we pack it even "better"?
I am still curious, though, what did the limited-cal sticker say? Was it related to the module/element or to the chassis? I am buying this to pull and use the module, the chassis with only three bays is of almost no use for me right now.
And there was some flux from previous(?) repair on the module, was this cleaned up a bit as part of repair?

Ice-Tea:
Let's see if we can wake the Captain for some of these questions. Re. packaging. Not sure if there's something better beyond Instapak. Here's a video:



Also: you or your puchasing department can also contact me directly (PM) in case you're not hellbent on lining eBays pockets even more. Use eBay if you like that extra level of protection/leverage but if you have some level of confidence in me, you can save a few $.

capt bullshot:

--- Quote from: www.MKRD.info on September 21, 2022, 12:56:01 am ---My Purchase Order Request was approved, my purchasing guy should be buying this soon.
Is Instapak secure enough to travel all the way to USA? Can we pack it even "better"?
I am still curious, though, what did the limited-cal sticker say? Was it related to the module/element or to the chassis? I am buying this to pull and use the module, the chassis with only three bays is of almost no use for me right now.
And there was some flux from previous(?) repair on the module, was this cleaned up a bit as part of repair?

--- End quote ---

Regarding the packaging, I doubt it can be done better - that Instapak stuff does a nice fit around the sides of the unit, and there's some other stuff used to fill up the spaces that the Instapak didn't reach. Of course, everything can be done better - but I don't think it's necessary here.

There's a cal sticker on the plugin and one at the front side of the instrument. Can't remember what they said, the unit is packed and I couldn't find photos of these stickers.

There's some flux residue at two through hole components, looks like the common residue from handsoldering. Most probably left from a previous repair, I didn't replace or de-solder any components. IMO and from my experience nothing to be concerned about. I didn't clean anything - following the "if it isn't broken, don't try to fix it" principle. Basically the electronics is fine, just the cal coefficients of the current channel were way off. Maybe left from some attempt to adjust it without proper knowledge of how to do this. I've digitally adjusted the current ranges to my best effort, but that's no calibration in the correct meaning of calibration. I left the voltage ranges untouched.

www.MKRD.info:
Thanks for the info!
We have a contracted on-site calibration service company, this unit will go thru a calibration anyways as soon as it is received, onsite for easier items, or mailed out if it cannot be done on-site. The main objective is for the unit (and everything else I get thru eBay these days) to pass calibration.

Have you dealt with Yokogawa Power Analyzers generally before?
It is weird that this only has a three-bay back cover installed. I wonder if expanding to six bays was just a matter of a back panel or if some electronic tweaks are also required.

Also, the general mode of failure of these 5A elements is people passing too much current thru the elements and frying shunt resistor. Do you have experience repairing shunt resistors on these modules?

It is moronic that Yokogawa is not at all interested in any support or repairs of these units. Even a WT1800 I have, even though it is still being sold "my unit's serial number is too old". What a load of horsecrap!!!

coppice:

--- Quote from: www.MKRD.info on September 24, 2022, 10:00:17 pm ---It is moronic that Yokogawa is not at all interested in any support or repairs of these units. Even a WT1800 I have, even though it is still being sold "my unit's serial number is too old". What a load of horsecrap!!!

--- End quote ---
I've never found what Yokogawa support is like, as I've never had one of their power meters/analysers go wrong. I've used some pretty old ones, too.

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