YOKOGAWA ZR22G User Manual page 225

(10) Alarm 211 to 214: Input temperature high and low alarm
If "External input" is selected in "Set measured gas pressure" or "Set measured gas temperature",
this alarm occurs when the input current exceeds the set alarm value. Possible causes are as
follows
• The output range of the transmitter does not correspond to the "Input pressure setting" or
"Input temperature setting" of the tester (in case of occurrence at start-up).
• Burnout is caused by an error in the thermocouple connected to the temperature transmitter.
• Abnormal transmitter.
• The pressure/temperature of the measured gas actually exceeds the alarm value.
<Searching for the cause of the error and remedy>
• Check that the temperature at 4 mA point and 20 mA point of the temperature transmitter
matches the "Input temperature setting" of the tester.
• Check that there is no error in the actual measurement gas.
• Select the detailed screen of the sensor menu and check the values for "Measured
gas pressure" or "Measured gas temperature". If this value is the burnout value of the
temperature transmitter, it is probable that the temperature transmitter or the thermocouple
connected to the temperature transmitter is abnormal. In this case, refer to the instruction
manual of the temperature transmitter to investigate the cause.
(11) Alarm 301: Battery low alarm
The internal circuit of the tester has a built-in battery, which is used to back up the internal clock,
etc. When this alarm occurs, the internal clock may stop while the power is not supplied to the
unit (this does not affect the set values of other operating parameters). The internal clock is used
for automatic calibration and automatic blowback schedule management. Therefore, when using
these functions, if the power supply to the tester stops, such as when a power failure occurs after
the low battery alarm occurs, be sure to check the date and time set in the tester the next time the
power is turned on. If it is different from the current time, set it again.
<Action>
The internal battery cannot be replaced by the customer. Contact our service.
Note
Approximate Battery Life (The battery life varies greatly depending on the operating environment.
The following is only a guideline and is not a guarantee.)
• The internal battery is not consumed when power is supplied to the instrument. Consider it
as a guideline for 10 years. However, after shipment, it will be consumed from the battery
until start-up.
• When power is not supplied to the unit, the life of the internal battery changes greatly
depending on the storage temperature. Storing the unit at room temperature (20 to 25°C)
results in five years or more, but in the case of-30 to 70°C, the life of the internal battery is
shortened to one year.
(12) Alarm 319: Fast warm-up function alarm
The internal circuit of the tester is equipped with a function to shorten the warm-up time when
an instantaneous power failure occurs, but this alarm occurs when the tester does not operate.
Contact our service to restore the warm-up reduction function.
<12. Troubleshooting>
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
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