Yokogawa DO402 Dissolved Oxygen Analyzer User Manual
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IM 12J05D02-01E
11-2 Appendix 2
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QIS 12J05D02-01E
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 data display will show “HIF.”
d. Press the [YES] key. The message display will show a manufacturing control
number.
This is the inspection mode.
Press the [ENT] key until the message display shows “mA1+2.”
Each time the [ENT] key is pressed, the value on the data display increases in steps of
4.0, like “0.0,” “4.0,” “8.0,” up to 20.0. Check the current outputs 1 and 2. Corresponding
to the data display, the current output must be within the range shown in Table 1.
When the data display shows “12.0,” pressing the [ENT] key causes the message display
to show “RIPPLE” and the data display to remain unchanged. Press the [ENT] key again.
The message display will show “mA” and the data display “16.0.”
Table 1
Data Display
Current Output 1 (mA DC)
Current Output 2 (mA DC)
4.0
4 ±0.02
4 ±0.02
12.0
12 ±0.02
12 ±0.02
20.0
20 ±0.02
20 ±0.02
3.4 Contact Operation Test
Following Section 3.3, press the [ENT] key until the message display shows “JUMPER.”
Then press the [ENT] key once, the message display will show “WAIT” and LEDs S1,
S2, WASH/S3, and FAIL/S4 flash rapidly. Check that the message display shows and
LEDs turns on/off in the order as shown in Table 2 and that a message of “FAIL x” does
not appear.
Table 2
Message Display
S1
S2
WASH/S3
FAIL/S4
LED1 OFF ON ON OFF
LED2 ON OFF ON OFF
LED3 ON ON OFF OFF
LED4 ON ON ON ON
3.5 Temperature
Indication Check
Following Section 3.4, press the [ENT] key until the message display shows “PT1000.” In
this state, change the resistance of the decade resistance box as shown in Table 3 and
check the data display. The value on the data display must be within the range shown in
Table 3.