From 7e6f1477d6f884366281b66be5598ac79351be0a Mon Sep 17 00:00:00 2001 From: Robin Clark Date: Sat, 9 Oct 2010 20:08:17 +0100 Subject: [PATCH] . --- fmmd_design_aide/fmmd_design_aide.tex | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fmmd_design_aide/fmmd_design_aide.tex b/fmmd_design_aide/fmmd_design_aide.tex index 800049b..071e8b2 100644 --- a/fmmd_design_aide/fmmd_design_aide.tex +++ b/fmmd_design_aide/fmmd_design_aide.tex @@ -104,8 +104,10 @@ An offset is applied to the input by R18 and R22 forming a potential divider of $\frac{820}{2.2E6+820}$. With 5V applied as Vcc this gives an input offset of $1.86\,mV$. So the amplified offset is $\approx 342 \, mV$. We can determine the output of the amplifier by subtracting this amount from the reading. We can also define an acceptable -range for the readings. This would depend on the milli-volt source, and also on the -detectability of the error volatges. +range for the readings. This would depend on the characteristics of milli-volt source, and also on the +thresholds of the volatges considered out of range. For the sake of example let us +consider this to be a type K thermocouple amplifier, with a range of temperatures +expected to be within {{0}\oc} and {{300}\oc}. EXPAND