Shimadzu PDA-7000, Instruction Manual

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7 Troubleshooting
7-2
7 Troubleshooting
7.1 Basic items to be checked
Sometimes, problems are caused by a simple cause. If a problem happens, check
the followings first.
Are the power of every unit ON?
Referring to "4.2 Checking gas flow rate", check if the power supply of the
spectrometer main unit and the vacuum pump are turned on. If they are not
powered even by the correct operation, check the distribution panel which
supplies the power to the instrument.
Is the photo detector ON?
If you carry out an analysis with the photo detector OFF, the error message will
appear. Turn ON the photo detector on Instrument Check screen.
Is the internal pressure of the spectrometer ok?
Check if the internal pressure of the spectrometer reaches the sufficient level on
Instrument Check screen.
Is the temperature of the spectrometer ok?
Check if the temperature display on the indicator on the switch panel stands within
the range of 40±1°C and the set temperature is 40°C.
Is the spark stand door correctly closed?
If the spark stand door is not correctly closed, the safety circuit works, stopping the
discharge. Check that the spark stand door is correctly closed.
Is the sample correctly set with the sample holder?
If the sample is not correctly set, the air will flow into the spark stand. This may
cause an abnormal discharge. Check if the sample is correctly held by the sample
holder.
Are the purity and the flow rate of the argon gas correct?
Argon gas to be used must conform to the following requirements.
Purity : 99.999% or more
Flow rate : 10L / min. during analysis (discharge)
1L / min. during standby
Oxygen : 1ppm or less
Dew point : below -70°C