YOKOGAWA EXAxt ZR22G, User Manual, Page: 151 / 211

<10. Other Functions>
10-4
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
10.1.11 Maximum Oxygen Concentration, Humidity and
Mixing Ratio
The maximum oxygen concentration, humidity and mixing ratio and the time of its occurrence
during the period specified in the Averaging display are displayed. After the present monitoring
interval has elapsed, the maximum oxygen concentration that has been displayed so far will be
cleared and a new maximum oxygen concentration will be displayed. If the setup period of time
is changed, the current maximum oxygen concentration will be displayed (for more details, see
Section 8.6.2 earlier in this manual).
10.1.12 Minimum Oxygen Concentration, Humidity and Mixing
Ratio
The minimum oxygen concentration, humidity and mixing ratio and the time of its occurrence
during the period specified in the Averaging display are displayed. If the setup period elapses,
the minimum oxygen concentration that has been displayed so far will be cleared and a new
minimum oxygen concentration will be displayed. If the setup period of time is changed, the
current minimum oxygen concentration will be displayed (for more details, see Section 8.6.2
earlier in this manual).
10.1.13 Average Oxygen Concentration, Humidity and Mixing
Ratio
The average oxygen concentration, humidity and mixing ratio during the periods over which
average values are calculated is displayed. If the setup period elapses, the average oxygen
concentration that has been displayed so far will be cleared and a new average oxygen
concentration will be displayed. If the setup period of time is changed, the current average
oxygen concentration will be displayed (for more details, see Section 8.6.2 earlier in this manual).
10.1.14 Heater On-Time Ratio
The probe sensor is heated to and maintained at 750°C. When the sample gas temperature is
high, the amount of heater ON-time decreases.
10.1.15 Time
The current date and time are displayed. These are backed up with built-in batteries, so the clock
continue the run even if the power is switched off.
10.1.16 History of Calibration Time
The calibration-conducted dates and times, and span gas and zero gas ratios for the past ten
calibrations are stored in memory.
10.1.17 Power Supply Voltage
For the temperature control for the heater of the detector to work best, you should set the power
supply voltage and frequency appropriately, as the control parameters are based on this. Set the
AC supply voltage to “Low” if supply is 140 V AC or less, and to “High” if it is 180 V or more.
10.1.18 Power Frequency
Set the AC supply frequency setting appropriately --”Low” for 50 Hz, and “High” for 60 Hz.
10.2 Trend Graph
Press the [Graph display] key in the Basic panel display to switch to the graph display.