Fuji Electric ZSS-7, Instruction Manual

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INZ-TN7ZSS-E
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8) Different measurement point may be the cause.
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Yes (Manual analysis or sampling type analyzer analyzes concentration in the center of stack where the gas is sampled,
while ZSS analyzes average concentration from edge to edge of the stack. Thus, non-uniformity of concentration
distribution in the stack makes difference in concentration.)
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9) Difference of measurement principle (sample being measured) may be the cause.
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Yes (Measuring object of manual analysis or ion electrode method may be entire ionizable substance like a chloride ion,
while the measuring object of ZSS is specific to substances like hydrogen chloride. Thus, if components other than
those which are measuring objects of ZSS are contained, difference is made in concentration.)
(12) The measured value is over the range.
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1) Is the measuring gas is a concentration value, which is over the range?
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Yes (Check it, conducting manual analysis and the like.)
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2) Is the length is longer than the specifications?
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Yes (When the measuring light path length is longer, compared with the specifications, the measuring concentration be-
comes higher.)
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3) Others
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Yes (Contact the manufacturer.)
(13) Even if the cylinder gas is supplied for the span calibration, the indication value does not increase.
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1) Are you using the new cylinder or the one not used for long time?
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Yes (If not used for long time, hydrogen chloride gas does not flow from the cylinder. Flow the a generous amount of gas
for a while.)
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2) Is the inside of the regulator in rust?
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Yes (Rust inside the regulator absorbs hydrogen chloride gas, and the gas does not flow. Replace it with the new one.)