16
INM MTL 130-0202 Rev 4
6 SERVICE AND MAINTENANCE
6.1 General
In keeping with all of our products, the KK650 is a highly reliable analyser. If a fault is
apparent on a new installation, the wiring, etc., should be checked thoroughly.
Similarly, if the instrument appears not to power up, ensure that a proper supply is in place
and that the two fuses are intact. One fuse, for the reactor, is located on the front panel
beneath the reactor temperature controller; and the other, for the entire instrument, is
located behind the terminal cover plate.
WARNING
Take all necessary precautions when working on exposed A.C. mains
terminals etc.
Only fuses of the type and rating shown here can be used to replace them.
Fuse Rating Type
Reactor fuse 5A, 48V minimum
Type ‘T’ (20mm x 5mm Ø)
Main instrument fuse 1.6A, 250V
Apart from initial installation wiring errors etc., there are three potential causes of failure.
• Contamination of the katharometer through the breakdown of the sampling system.
• Contamination of the katharometer from accumulated carry-over after a prolonged
period of operation.
• Incorrect calibration
The first two are normally picked up by the display of a fault code, the last is cured by a
recalibration.
6.2 Fault codes
Fault code Meaning
1 Vo1 has measured < (-)4093 A/D counts
2 Vo1 has measured > 4093 A/D counts
4 Vo2 has measured < (-)4093 A/D counts
8 Vo2 has measured > 4093 A/D counts
16 Vt has measured < -4093 A/D counts
32 Vt has measured > 4093 A/D counts
64 Vo1 offset is too low while performing zero calibration
128 Vo1 offset is too high while performing zero calibration
256 Vo2 offset is too low while performing zero calibration
512 Vo2 offset is too high while performing zero calibration
1024 Vo1 factor is too low while performing H2 span calibration
2048 Vo1 factor is too high while performing H2 span calibration
4096 Vo2 factor is too low while performing H2 span calibration
8192 Vo2 factor is too high while performing H2 span calibration
16384 Vo1 factor is too low while performing Cl2 span calibration
32768 Vo1 factor is too high while performing Cl2 span calibration
65536 Vo2 factor is too low while performing Cl2 span calibration
131072 Vo2 factor is too high while performing Cl2 span calibration
262144 Reactor temperature outside of ±10°C of set-point error band
524288 Cannot read the katharometer identity module
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