Eaton KK650 Instruction Manual

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Eaton KK650 Instruction Manual Manual pdf 18 page image

14INM MTL 130-0202 Rev 4IMPORTANT NOTES1. When calibrating, it is important to maintain a steady flow of calibration gas. For all gases, exceptthe hydrogen in air mixture, flows of up to 400ml/min are acceptable. For hydrogen in air mixturesthe flow must be limited to no more than 100ml/min (100ml/min = 0.212cuft/hr). This is becausethe reaction time of hydrogen with the oxygen in the air is somewhat slower than the reaction ofhydrogen with the chlorine in the process gas. Its longer residence time in the reactor at the lowerflow rate ensures complete reaction. Allow enough time for the sample system to be purged ofeach gas and for the instrument to stabilise between each gas by flowing each one for 10 to 15minutes.2. When using argon to calibrate chlorine span the calibration screen displays % argon. Whenreturning to normal Measurement Mode from Calibration Mode with argon still flowing, thechlorine concentration displayed will be the argon equivalent for that particular katharometer.This figure varies from 33% to 35%. The precise point varies slightly from one katharometer toanother, and the exact figure is a part of the katharometer’s characteristics that are contained in theKatharometer Identity Module (KIM). This figure is used by the software to set the 100% chlorinepoint from the 100% argon point. The following diagram illustrates this graphically in terms of thethermal conductivities of the three gases.Thermal ConductivityAirChlorineArgon100% of span33/35% of span5.3 Calibration modeRefer to calibration screen map on next pageView EditCalHITECH INSTRUMENTS Luton England.Hydrogen in Chlorine AnalyserPress Cal key forappoximately8 seconds toaccess calibrationPress Meas cal gaskey after eachcalibration gas hasbeen passed for 10to 15 minutes andthe reading is stableMeascalgasThis screenappears whencalibration modeis enteredCalibration modeSurrogateNonsurrogateVIEW to exitView EditCal MeasCalGas2LA2LA1LA AL1Hydrogen in Chlorine AnalyserKK650 MTL Hydrogen in Chlorine Analyser