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Sounds like a return to the dark ages- I thought local management was meant to do away with all the centralised crap?
Locally, the equipment I tend to deal with in schools- balances, microscopes etc- used to go to board-wide tender. Now, each facility running independently, the smaller operator like myself gets a good turn, and yes, the Dept. saves money.
That one’s easy. Torx are better than Allen, allen better than normal hex. It’s all about the angle that torque is applied at- if the bit is a proper fit, there’s less chance of camming-out and damaging the head. The fastener is retained better on the tool too. Look at the motor trade, wider and wider useage of splined bits- 12 points and more. Very hard fasteners and tools allow massive torques.
If the designer has specified fasteners that are soft as butter, it doesn’t matter which head design is in use, tho.
Here’s a meter that’ll do just about any start/ run capacitor you’ll ever trip over
Capacitors decrease in “size” over the years. An analogue meter only tells you “it’s a capacitor”, treat yourself to a cheap digital meter with capacitance and you can prove it’s within tolerance or not.
Doh. Another one that doesn’t look at the front page, only the forums…
OK, so what’s the actual issue then? We haven’t been seeing many cases of these machines going up in smoke…
Never anything else, my own machine falls into that range and if it’s a simple wiring re-route or resolder of the heater relay or such, I’d rather do it myself than waste a half-a-day’s chargeable time or more waiting on somebody to do it for me…
You’d need to wait for DAYS with the door closed to get he whole chamber below zero. There’s only convective circulation here and a small surface area.
The ‘stat is only interested in the temp of the coldplate, the actual chamber temp depends on all other outside influences. If you can’t get the stat to turn off it would seem that the pocket at the end of the tube is loose or the foam has failed in that area.
In this case, the unit is likely scrap, and only bodging it by bonding the end of the capillary to the rear face of the chamber. or opening the foam at the rear and dealing with it from the outside is likely to be an improvement. Either of those would be a bodge for sure and risk killing the unit or rendering it unsafe in the process. That’d be your choice…
