Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer User Manual
Page 81
IM 12J05C01-01E
2-16 Appendix
3/3
QIS 12J05C01-71E
i. Press
the
[ ] key. The instrument returns to the measurement mode.
Set the display to nA current indication by following the steps below.
a. Press the [MODE] key. The message display will show “CALIB.”
b. Press the [NO] key once. The message display will show “DISP.”
c. Press the [YES] key once. The message display will show temperature indication.
d. Press the [NO] key five times. The message display will show nA current indication.
Change the current of DC generator 2 as shown in Table 3. The corresponding indication must
be within the range.
Table 3
Reference (nA)
Data Display (nA)
200 200
±1
600 600
±3
1000
1000
±5
Press the [MODE] key to return to normal mode.
3.6 Profibus
Communication
Functional
Check
Check for normal function using Profibus equipment specified by Yokogawa.
In the tests of Item 3.3 to 3.5, check the communication function using Profibus communication.
DO202
G
11
12
16
15
＋
13
+
14
17
SH
●
GALV SENS ●
●
POL SENS ●
18
－
+
-
+
-
Decade
Resistance
Box
DC
Generator
2
DC
Generator
1
SW1
Shorting Bar
Profidbus Equipment Specified by Yokogawa
C
R
C
R
SUPPLY
TEMP
+
–
R=50
１
Ω± Ω
C=2μF±0.4μF
+
–
DA/PA Coupler
DC
Source
24VDC
Figure 1 Testing Circuit and Test Equipment