Ron,
this was in the specifications.
Heat-reset proportional cycle: 1~100 sec
Detective temperature range：0 to 400℃
Insulation resistance: >50M ohm(500V DC)
Insulation resistance: 1500V AC/min
I have K thermocouple that won't go over 400°C,
the controller, like yours went well over.
I changed the thermocouple and all went well. I bought my high temp K thermocouple from a ceramics shop. I think you find that the K bit relates to the kind of plug.
I hope this helps.
Matthew TINKER
CNC conversion 1944 Colchester Lathe build-up log
http://www.cnczone.com/forums/showthread.php?t=35519
________________________________
From: Ron Thompson <ron@ourcadguy.com>
To: castinghobby@yahoogroups.com; gingery_machines@yahoogroups.com
Sent: Saturday, 10 September 2011, 21:55
Subject: [gingery_machines] Electric furnace parts update
The good news is the PID controller I ordered from Hong Kong through
ebay arrived in only 12 days!
The bad news is I was snookered. More accurately, I snookered myself, as
all the info was there had I read it all carefully.
The controller uses a type K thermocouple (−200 °C to +1350 °C / -328 °F
to +2462 °F range), and comes with it.
The control face has 4 digits.
I was surprised to learn it only goes up to 400C. Not quite good enough
for aluminum! I fail to understand why this limitation, as all the
hardware seems fully capable. The limit must be in the micro-controller
programming.
The good news is the thermocouple is killer. Nice braided stainless
steel sheath and crimped on terminal lugs.
Anyone know of an easy mod to make this thing go higher?
<http://www.ebay.com/itm/180672227828?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649>
ebay auction #180672227828
You can program the type of thermocouple, so I wonder if I can lie to
it?<GRIN>
--
Ron Thompson
On the Beautiful Florida Space Coast, right beside the Kennedy Space Center, USA
There are two kinds of posts on newsgroups.
1. This is what I have done...
2. This is what I think...
Be aware of the difference!
http://www.ourcadguy.com/
http://www.plansandprojects.com My hobby pages are here:
http://www.plansandprojects.com/My%20Machines/
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http://castinghobbyfaq.bareboogerhost.com/
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