Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer User Manual
Page 71
IM 12J05C01-01E
2-6 Appendix
2/4
QIS 12J05C01-21E
(1) Entering Service Code 87.
a. Press the [ ] key. The message display will show “ OUTP.”
b. Press the [NO] key twice. The message display will show “ SERV.”
c. Press the [YES] key. The data display will show “00” with the first digit of 0 flashing.
d. Press the [
] key eight times. The data display will show “80” with the first digit of 8
flashing.
e. Press the [>] key once. The data display will show “80” with the second digit of 0
flashing.
f. Press
the
[
] key seven times. The data display will show “87” with the second digit of 7
flashing.
g. Press the [ENT] key. The message display will show “ PASS .”
(2) Setting Password 070.
a. Press the [>] key once. The data display will show “000” with the second digit of 0
flashing.
b. Press the [
] key seven times. The data display will show “070” with the second digit of
7 flashing.
c. Press the [ENT] key. The message display will show “HIF.”
d. Press the [YES] key.
(3) Confirming the date and time.
a. Press the [ENT] key. The data display will show the date in day, month, year format.
b. Press the [ENT] key. The data display will show the time in hour, minute, second format.
c. Press the [ENT] key. The message display will show “mA.”
This is the inspection mode. When the message display shows “mA,” check the current outputs.
Each time the [ENT] key is pressed, the value on the data display increase in steps of 4.0 like
“4.0,” and “8.0.” Check the current outputs. Corresponding to the data display, the current
output must be within the range shown in Table 1.
Table 1
Data Display
Current Output (mA DC)
4.0 4
±0.02
12.0 12
±0.02
20.0 20
±0.02
3.4 Temperature
Indication
Check
Following Section 3.3, press the [ENT] key until the message display shows “22kNTC.” In this
state, change the resistance of the decade resistance box and check the data display. The
value on the data display must be within the range shown in Table 2.
Table 2
Temperature (°C)
Decade Box Resistance (:)
Data Display (°C)
–9 99.6k
–9
±0.3
25 22k
25
±0.3
140 653.8
140
±0.3