Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer - Manual (Page 76)

IM 12J05C01-01E
Appendix 2-11
2/3
QIS 12J05C01-61E
In this state, change the resistance value of the decade resistance box as shown in Table 1.
The corresponding temperature indication must be within the range.
Table 1
Reference
Temperature (°C)
Resistance of
Resistance Box (Ω)
Data Display (°C)
–9 99.6k –9 ±0.3
25 22k 25 ±0.3
140 653.8 140 ±0.3
3.4 Galvanic Indication Check
Turn on SW1.
Set the sensor type to galvanic.
Setting Service Code 01 to 0.
a. Press the [
] key. The message display will show “
SERV.”
b. Press the [YES] key. The data display will show “00” with the first digit of 0 flashing.
c. Press the [>] key once. The second digit of 0 flashes.
d. Press the [ š ] key once. The data display will show “01” with 1 flashing.
e. Press the [ENT] key. The message display will show “
STYPE.”
f. Press the [ š ] key once. The data display will change from “1” to “0.”
g. Press the [ENT] key until the message display shows “
SERV.”
h. Press the [
] key. The instrument returns to the measurement mode.
Set the display to μA 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 μA current indication.
Change the current of DC generator 1 as shown in Table 2. The corresponding indication must
be within the range.
Table 2
Reference (μA) Data Display (μA)
10 10 ±0.06
30 30 ±0.10
50 50 ±0.20
Press the [MODE] key to return to normal mode.
3.5 Polarographic Indication Check
Turn off SW1.
Set the sensor type to polarograph.
Setting Service Code 01 to 1.
a. Press the [
] key. The message display will show “
SERV.”
b. Press the [NO] key twice.
c. Press the [YES] key. The data display will show “00” with the first digit of 0 flashing.
d. Press the [>] key once. The second digit of 0 flashes.
e. Press the [ š ] key once. The data display will show “01” with 1 flashing.
f. Press the [ENT] key. The message display will show “
STYPE.”
g. Press the [ š ] key once. The data display will change from “0” to “1.”
h. Press the [ENT] key until the message display shows “
SERV.”