Hitachi HIDIC EH-150 EH-PT4 Applications Manual page 22

(2) Content of temperature conversion data [range : -20 to +40
The meaning of the each bit( b0 to b15) of temperature conversion data (in WX**) is as shown
below.
The sum of the bit "1" is the measured temperature.
b15 b14 b13 b12 b11 b10 b9
-80 20
10
40
<For example>
(1) HE000 =
(2) H0600 = 0000 0110 0000 0000"
When an input error occurs( below -25
H7FFF.
The following relation exits between temperature conversion data and actual temperature.
Temperature (
Note) "b0" is always "0" in normal time.
Relation between the temperature and temperature conversion data
b)Temperature conversion data(hexadecimal) -20 to +40
H4000
H3000
H2000
H1000
H0800
-20
0
5
HE000
b8 b7
5 1.25 0.3125
2.5 0.625
1110 0000 0000 0000"
(HE) (H0) (H0) (H0)
-800 + 40 + 20 = - 20
(H0) (H6) (H0) (H0)
2.5 + 1.25 = 3.75 ℃
C and over 45
°
Temperature conversion data(signed decimal data)
° C) =
10 20
Figure 7.4
C] (Pt100)
°
b6 b5 b4
b3
0.78125
0.1953125
0.15625 0.390625 0.0976562
° C
C), the temperature conversion data is
°
409.6
C
°
Temperate (
30
40
7-3
7. Collection of Temperate
b1 b0
b2
( C)
°
0.0488281
0.024414
Note)
C)
°