TOHO ELECTRONICS TTM200 - Manual (Page 154)

48-7009-E 6-6
PV X-Y 2-POINT CORRECTION SETTING
Determine any two points within the input range (upper and lower limit), then convert to corrected value to the PUV of Input 1.
For Example)
When the PV of the product is;
90℃ indication but actual temp. is 100℃
310℃ indication but the actual temp. is 300℃
If these are to be corrected by 2-point Correction Setting;
PV before correction: PX 1 = 90℃, PX 2 = 310℃
PV after correction: PY 1 = 100℃, PX 2 = 300℃
PX 1 PV Before Correction Lower Limit Value Setting
Setting Range：Setting Range Lower Limit to (PX 2 － 1℃) or Setting Range Lower Limit to (PX 2 –1.0℃)
：Setting Range Lower Limit to (PX 2 – 10-digits)
Setting Units：1℃ or 0.1℃, 1-digit
PX 2 PV Before Correction Upper Limit Value Setting
Setting Range：(PX 1 + 1℃) to Setting Range Upper Limit , or (PX 1 + 1.0℃) to Setting Range Upper Limit
：(PX 1 + 10-digits) to Setting Range Upper Limit
Setting Units：1℃ or 0.1℃, 1-digit
PY 1 PV After Correction Lower Limit Value Setting
Setting Range：Setting Range Lower Limit to (PY 2 － 1℃) or Setting Range Lower Limit to (PY 2 –1.0℃)
：Setting Range Lower Limit to (PY 2 – 10-digits)
Setting Units：1℃ or 0.1℃, 1-digit
PY 2 PV After Correction Upper Limit Value Setting
Setting Range：(PY 1 + 1℃) to Setting Range Upper Limit , or (PY 1 + 1.0℃) to Setting Range Upper Limit
：(PY 1 + 10-digits) to Setting Range Upper Limit
Setting Units：1℃ or 0.1℃, 1-digit
NOTE: - As much as possible, set the difference in the value of Before Correction and After
Correction bigger within the realizable range. When the difference is small, the margin of
error might be bigger.
- When the slope of PX 1 and PX 2 (before correction) is set to 1 and when the slope after
Correction becomes less than 1, the indication range in each input type becomes narrow.
ＰＸ１
ＰＹ１
ＰＹ２
ＰＸ２
After Correction
Before Correction
ＰＶ値
Actial Input
Upper Limit Value Lower Limit Value