Eaton KK650 Instruction Manual

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Contents

Eaton KK650 Instruction Manual Manual pdf 27 page image

INM MTL 130-0202 Rev 4236.9.2 Removal and replacementThe power supply to the instrument must be completely disconnected.The stainless steel electronics unit mounts to the backplate of the enclosure on four captivestuds, two each side, and is secured to each with a nut, a locking washer and a plain washer -see Figure 4 (page 8) for details.1. Remove the nut on the backplate grounding stud so that the earth wire connected tothe steel casing of the control unit can be detached easily at the end of the next step.2. Support the control unit while removing the nuts and washers from the studs. Theelectronics unit can then be detached from the connectors at the rear together with itsearth wire.Replacement is the reversal of removal. Before fitting the replacement electronics ensure thatit is configured for the same supply voltage as the one it is replacing, this can be determinedfrom the label on the side of the electronics unit. If in doubt, contact your local MTL Gassales office who will require the serial numbers of both the old and the new units to checkthe details.1. Thread the earth wire behind the lower cover then carefully align the new module intoposition on the mounting studs. Carefully press the module into position to fully engage therear connectors.2. While supporting the unit in place, fit a plain washer and a locking washer over one of thetop studs and spin a nut onto it until finger-tight. Do the same on the other top stud tosecure the unit. Fit the lower washers and nuts in a similar manner then tighten all fournuts to a suitable torque value.3. Refit the earth wire, with the others, on the backplate grounding stud and replace thesecuring washer and nut. Tighten to a suitable torque value.The instrument will now need to be calibrated and any user configuration settings will need tobe re-entered. See sections 5.3 and 6 for details.6.10 Restoring factory defaultsThis procedure may be used where mis-calibration is producing unacceptable errors and re-calibration is not possible – e.g. no gas available.This procedure should be carried out by qualified service personnel only, and only as indicatedby the fault finding requirements set out in the trouble-shooting chart in section 7.3.6.10.1 Tools requiredNone6.10.2 InstructionsDisconnect the instrument from its power supply and leave for 30 seconds. Whilst keepingthe Cal button depressed, apply power to the instrument. Continue to hold the Cal buttonuntil a ‘Calibration data lost’ message appears on the display.Connect a dry air source to the instrument and flow air at approx 200 ml /min through thesensor and check the chlorine and hydrogen zero accuracy against the table below. If thereadings are outside the limits shown, it is likely that the katharometer sensor is contaminatedand will need cleaning. See section 7.6 for the cleaning procedure. Should the cleaning notrestore operation to within limits shown below, the sensor and its KIM should be replaced.If the results are within the limits shown here, recalibrate the analyser and restore thecustomer settings from the noted values above.6.10.3 Acceptable limitsReading Error - %AbsoluteChlorine ± 8%Hydrogen ± 1%These limits refer to the zero reading accuracy at room temperature after restoring factorysettings but before performing a gas calibration.

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