―
115
―
HXPRM10mnC0001E
When input 4
～
20mA, the square root computation accuracy:
ε
is as following formula.
Measuring 100%
ε
100
＝
＝
＝
0.16% rdg
Measuring 50%
ε
50
＝
＝
＝
0.19% rdg
Measuring 9%
ε
9
＝
＝
＝
2.3% rdg
Measuring 1%
ε
1
＝
＝
5
（
0.002
＋
12.5
） ＝
62.5% rdg
If the process variable is low as above, its accuracy rating is incorrect.
(3) Decade
The accuracy rating at the decade computation is defined the logarithm of display value. Normally,
the accuracy rating is less than 1 digit and you cannot read by significant digit.
(4) Difference, Sum, and Average
The accuracy rating of Difference, Sum, and Average is as following formula.
Difference and Sum
: Reference channel accuracy rating ×2
Average
: Reference channel accuracy rating
Example) When Reference channel VOLT is 00.00
～
10.00V and Difference is
－
10.00
～
10.00.
Reference channel accuracy rating
＝
±（
0.3%×10.00V
＋
3 digits
）
＝
±（
1000×0.003
＋
3
）
＝
±
6 digits
Difference accuracy rating
＝
±
6×2
＝
±
12 digits
5
（
0.2
＋
0.125
）
10
5e
100
5
（
0.1
＋
0.167
）
7.07
5e
50
5
（
0.018
＋
1.39
）
3
5e
9
5e
1
