ABB AX418 User Manual

Also see for AX418: Manual User guide User guide

ABB AX418 User Manual Manual pdf 58 page image

56Dissolved Oxygen – AX480, AX488 and AX468RangeProgrammable 0 to 250% saturation, 0 to 25 mgl -1 or 0 to 25ppmMinimum span0 to 2 mgl -1 or ppm0 to 20% saturationUnits of measure% saturation, mgl -1 and ppmResolution0.1 (% saturation), 0.01 (mgl -1 ) or 0.01 (ppm)Accuracy1 (% saturation), 0.1 (mgl -1 ) or 0.1 (ppm)Operating temperature range0 to 40°C (32 to 104°F)Temperature sensor input3-wire Pt100Salinity correctionAutomatic over the range 0 to 40 parts per thousandAuto sensor life indicatorIndicates conditions of remaining sensor lifepH/Redox – AX468 onlyInputsOne pH or mV input and solution earthOne temperature sensorEnables connection to glass or enamel pH and reference sensorsand Redox (ORP) sensorsInput resistanceGlass > 1 x 10 131Reference 1 x 10 131Range–2 to 16pH or –1200 to +1200mVMinimum spanAny 2pH span or 100mVResolution0.01pHAccuracy0.01pHTemperature compensation modesAutomatic or manual Nernstian compensationRange –10 to 200°C (14 to 392°F)Process solution compensation with configurable coefficientRange –10 to 200°C (14 to 392°F)adjustable –0.05 to +0.02%/°C (–0.02 to +0.009%/°F)Temperature sensorProgrammable Pt100 (3-wire), Pt1000 & Balco 3k.Calibration RangesCheck value (zero point) 0 to 14pHSlopeBetween 40 and 105% (low limit user-configurable)Electrode Calibration ModesCalibration with auto-stability checkingAutomatic one or two point calibration selectable from:ABBDINMerckNISTUS TechTwo x user-defined buffer tables for manual entry orTwo-point calibration or single-point process calibrationDisplayTypeDual 5-digit, 7-segment, backlit LCDInformation16-character, single line dot-matrixEnergy-saving functionBacklit LCD configurable as ON or Auto Off after 60sLogbook*Electronic record of major process events and calibration dataReal-time clock*Records time for logbook and auto-manual functions*Available if option board is fittedSensor Cleaning FunctionConfigurable cleaning action relay contactContinuous orPulse in 1s on and off timesFrequency5 minutes to 24 hours, programmable in 15 minute increments upto 1 hour then in 1 hour increments for 1 to 24 hoursDuration15s to 10 minutes, programmable in 15s increments up to1 minute then in 1 minute increments up to 10 minutesRecovery period30s to 5 minutes, programmable in 30s incrementsSPECIFICATION