Fukuda 8000 Series, Maintenance Manual

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9-10
Chapter 9 Maintenance Check CO2 Calibration (HCP-800/HCP-810)
7
Set the "Flow Rate" to initial value.
CO
2
Calibration (HCP-800/HCP-810)
This section describes about the procedure of CO
2
gas calibration.
Perform calibration when 1 year has elapsed from the last calibration, or accumulated EtCO
2
measurement time
exceeds 4,000 hours, or any measurement error is found.
1
Press the [Menu], [CO
2
] ("Parameter"), [CO
2
Calibration] to display the CO
2
calibration screen.
2
Press the [Start Cal] key and conduct calibration according to the displayed messages.
3
The message, <Feed CAL. GAS> will be displayed. Press the injection button and inject the calibration gas.
4
The message, <Cal. Gas can be removed> will be displayed. Stop pressing the injection button to cease the
injection.
5
The message, <CAL. OK> will be displayed. "Last Cal. Date" will be updated to the current date.
 If any of the following messages is displayed, start the procedure again from step 2. <CAL. error>, <CAL
GAS error>, <Auto Zero fail>, <No stable gas flow>, <CAL. failure>
6
Press the [Cal Complete] key to end the calibration.
CAUTION
 Perform the calibration 5 minutes after turning ON the power on the HCP-800/HCP-810.
 Do not disconnect the sampling tube during calibration. If disconnected, calibration will
cease.
 Conduct CO
2
calibration for the following case.
If the CO
2
gas calibration is not performed at a specified interval, CO
2
measurement
accuracy may be affected and also subsequent gas calibration may not be possible.
 When the accumulated measurement time exceeds 1,200 hours from the first use.
However, if the first calibration was performed before the accumulated measurement
time reaches 720 hours, another calibration is required when the accumulated
measurement time exceeds 1,200 hours from the first calibration.
 When 12 months has elapsed or the accumulated measurement time has exceeded
4,000 hours from the previous calibration.