Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 83)

<7. Startup>
7-18
IM 11M12A01-04E
Table 7.13 Conducting Calibration (Continued)
Switch operation Display Description
> ∧
ENT ZEro Y
If you touch the [ENT] key again, the flashing stops and "ZEro Y" appears.
Close the span gas flow valve. Secure the span gas lock nut for leakage.
If the automatic calibration unit is connected, close the span gas solenoid
valve.
If zero gas calibration is omitted, touch the [>] key to change "Y" to "N".
Next, if you touch the [ENT] key, the display jumps to "CALEnd."
> ∧
ENT 0.98
%
Touch the [ENT] key to display the calibration gas value.
This value must be the zero gas concentration set in Section 7.10.1,
"Calibration Setup," earlier in this manual.
To cancel the above, touch the [>] key and [ENT] key together, then the
display returns to "ZEro Y."
> ∧
ENT OPEn
/0.89
If you touch the [ENT] key, "OPEn" and the currently measured value are
displayed alternately. Open the Flow Setting Unit zero gas flow valve and
adjust the zero gas flow to 600 ± 60 ml/min. To do this, loosen the valve
lock nut and gently turn the valve control (shaft) counterclockwise.
Check the calibration gas flowmeter for confirmation. If the automatic
calibration unit is connected, open the zero gas solenoid valve, and then
the measured value changes to the zero gas value. When the display
becomes stable, proceed to the next step.
To cancel the above, touch the [>] key and [ENT] key together, then the
display returns to "ZEro Y."
> ∧
ENT 0.89
%
If you touch the [ENT] key, all the digits flash. At that point, no calibration is
conducted yet.
> ∧
ENT CALEnd
Touch the [ENT] key again to get the measured value to agree with the
zero gas concentration. Close the zero gas flow valve.
Secure the valve lock nut for leakage during measurement.
If the automatic calibration unit is connected, close the span gas solenoid
valve. "CALEnd" flashes during the output hold time. If "output hold" is
specified in the Output Hold setting," it remains as an analog output (see
Section 8.3).
When the preset output hold time is up, the calibration is complete.
> ∧
ENT b10
The output hold time is set to 10 minutes at the factory.
If you touch both the [>] key and [ENT] key at the same time during the
preset Output Hold Time, the calibration is aborted and the parameter
code selection display appears.
> ∧
ENT Basic panel
display
If you touch the [>] key and [ENT] key together, then the basic panel
display appears.
The above "display" is a result of switch operations.
The symbol [ ] indicates the keys are being touched, and the light characters indicate "flashing."
"/" indicates that the characters are displayed alternately.