Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer - Manual (Page 60)

IM 12J05C01-01E
Error Generation Error content and Causes Measures
No. Mode
E10 All modes EEPROM writing failure Turn off the power and then turn it
Electronic circuit failure back on and check whether or not the
system returns to normal.
If the failure occurs again, contact
Yokogawa to request repair.
E15 CODE 11 Temperature error correction failure Accurately measure the temperature of
The difference between the corrected value the measuring solution (dissolved oxygen
and the standard value exceeds the range sensor).
corresponding to ±7.5°C (±13 5°F). Examine whether the sensor cable fails
• Temperature entry is not accurate. (partial disconnection or degraded
• Sensor cable failure insulation) and then correct the
temperature error again.
E16 All modes Call for maintenance-interval time exceeded Perform maintenance. Reset interval.
E17 *OUTP Output span too small. Re-enter a value within the permissible range.
CODE 35 Min. span is 1ppm, 25ppb or 10%
E18 CODE 35 Table values make no sense. Reprogram.
E19 At data entry Configuration failure Re-enter a value within the permissible
A value not within the permissible range is entered. range.
E20 All modes Instrument initialization failure Contact Yokogawa
E21 All modes EPROM comparison failure Contact Yokogawa
Troubleshooting 8-2
Note: It is possible that the error message does
not disappear immediately after corrective
measures.
Then turn power off and the turn it back on
and check whether the system returns to
normal.
mA
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