Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 147)

<12. Troubleshooting>
12-8
IM 11M12A01-04E
CAUTION
• Measure the thermocouple resistance value after the difference between the probe tip
temperature and the ambient temperature decreases to 50°C or less. If the thermocouple
voltage is large, accurate measurement cannot be achieved.
F12.3E.ai
1
2
3
4
YEL
GRN
RED
WHT
Thermocouple Multimeter
(Ω)
Figure 12.6
(4) If the inspection indicates that the thermocouple is normal, the electronics may be defective.
Consult your local Yokogawa service or sales representative.
12.2.2.7 Alarm 13: Battery Low Alarm
An internal battery is used as backup for the clock. After this alarm occurs, removing power from the
instrument may cause the clock to stop but should not affect stored parameters. The internal clock is
used for calibration and purge scheduling; if you use this then after a battery alarm occurs (until the
battery is replaced) be sure to check / correct the date and time every time you turn on the power.
When the battery low alarm occurs, remember that the battery cannot be replaced by the user.
Contact your Yokogawa service representative.
NOTE
Battery life varies with environmental conditions.
* If power is applied to the instrument continuously, then the battery should not run down, and life
is typically about ten years. However the battery will be used during the time interval between
shipment from the factory and installation.
* If power is not applied to the instrument, at normal room temperatures of 20 to 25°C then battery
life is typically 5 years, and outside this range but within the range -30 to +70°C then battery life
is typically 1 year.