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Homeroasters - Home Roasting Coffee Community » DATALOGGERS - CONTROLLERS - RATE OF RISE METERS » Dataloggers/Controllers/Rate of Rise Meters

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RTD info (Resistive Temperature Device)
seedlings	#21 Posted on 04/20/2010 12:28 PM
1 1/2 Pounder Posts: 4226 Joined: June 27, 2007	I found an actual manual: http://hpsweb.hon...1i6226.pdf And it IS capable of other inputs, which is very nice. My cobbled TC wires are giving readings either too high (900F) or too low (-300F), so I think there's high resistance open, or I'm not getting a good connection at the back, or I don't know what type of wire this was from my multimeter probe. Tried polarity both ways. I do have setup questions regarding alarm adjustment range (direct acting, reverse acting, deviation and band). CHAD Edited by seedlings on 04/20/2010 12:30 PM Roaster: CoffeeAir II 2# DIY air roaster Grinder: Vintage Grindmaster 500 Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover


JimG	#22 Posted on 04/20/2010 12:46 PM
1 1/2 Pounder Posts: 834 Joined: October 23, 2008	Quote seedlings wrote: My cobbled TC wires are giving readings either too high (900F) or too low (-300F), so I think there's high resistance open, or I'm not getting a good connection at the back, or I don't know what type of wire this was from my multimeter probe. Tried polarity both ways. Try shorting the t/c inputs together using a short loop of any kind of wire. Regardless of which type of t/c wire the instrument is expecting, it should show room temperature on the display. Jim
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