Cell, Cell Window And O-Ring; Detector Unit (Except For O Sensor) - Fuji Electric ZPA Service Manual

(3) Cell, cell window and O-ring

Service life
Recommended period of replacement : 2 years with O-ring
1) Error mode
Error mode (1) : Contamination of cell, mixture of foreign matter, and contamination of cell window
Phenomena
Check
Error mode (2) : Crack in cell window
Phenomena
Check
2) Measures
3) Replacement
4) Adjustment after clean and replacement :
(4) Detector unit (except for O
Recommended period of replacement : 5 years
1) Error mode
Error mode (1) : Sensitivity deterioration due to sealed gas leak
Phenomena
Check
Error mode (2) : Damage to mass-flow detector.
Phenomena
Check
Error mode (3) : Detector voltage, control failure
Phenomena
Check
Check terminal Check voltage
+6.5±0.05 V
DV1-GND
(detector +8.08±0.1 V
voltage)
+12±0.1 V
+9.05±0.1 V
*1 written in the lavel on the Detector.
TN5A1191-E
: Usable unless contamination or corrosion is excessive.
: Scale-out indication, drift and calibration error occurred to analyzer
: Disassemble the cell to assure that the inside is clean.
: No change in indication, slow response, calibration error, and indication fluctuation
: Perform a visual check of the cell window.
: Cell : Clean the inside of the cell (refer to the instruction manual for details).
Replace if the inside is exposed to excessive contamination or corrosion.
Cell window : Clean the cell window. Replace if the inside is exposed to excessive
contamination.
: For replacement, refer to the instruction manual.
Perform zero and span calibration and check response time for each component.
2
: Calibration error and fluctuation in indication
: Check indication value at zero point
Check the indication value for each component on the
"Sensor Input Value" screen in the "Maintenance" mode. If
the light source is in normal condition and the cell is free of
contamination, the counter value indicates 35,000 to 55,000
(ZPA) or 350,000 to 550,000 (ZPB & ZPG) when zero gas is
supplied. If the counter value is below the range, sensitivity
can be degraded.
: Scale-out indication of analyzer , Error- 1 occurs.
: Turn OFF the power of the analyzer and disconnect the
connector connected from the detector to PC board. Measure
resistance between J1 – J4 and J2 – J3 of the amplifier board
on the detector. The measure values must be between 57
and 63 . If the resistance value is fluctuated beyond the
specified range, the detector element may be damaged.
Note : Do not use measurement analyzer that allows a current of 2mA or more to be
supplied when measuring resistance, otherwise the element can be damaged.
: Calibration error and fluctuation in indication
: Check amplifier board and measure voltage between
DV1–GND of the terminal.
It is normal if the value is fill the voltage range table
below.
Detector type(*1)
CO-L, CO-M (for ZPA&ZPB), CO-F, CO-H
CO -L, CO
2
CH -L, C H
4
NO-H, CO-M (for ZPG)
SO -BH
2
sensor)
-M, CO -H
2 2
-M, C H -H
4 4
Detector
Label
CO-L
Type
13