Hanna Instruments HI 24 Series Instruction Manual

Also see for HI 23 Series: Instruction manual

Contents

Hanna Instruments HI 24 Series Instruction Manual Manual pdf 4 page image

76FUNCTIONAL DESCRIPTION1. Liquid Crystal Display2. CAL DATA key last calibration data viewing (enters and exits)3. LCD key exits from setup and reverts back to normal mode (in idleor control phases with the measurement on the display).During EC/TDS calibration, it alternates EC/TDS buffervalue and current cell constant on the display. In HI 24series, it switches between EC and TDS reading4. CAL key initiates and exits calibration mode5. SETUP key enters setup mode6.  key moves to the next digit/letter (circular solution) when se-lecting a parameter. Same as Ò key during last calibrationdata viewing mode7. Ò key increases the blinking digit/letter by one when selecting aparameter. Advances forward while in last calibrationdata viewing mode. Increases the temperature settingwhen temperature probe is not inserted8. CFM key confirms current choice (and skips to the next item)9. Ú key decreases the blinking digit/letter by one when selectinga parameter. Reverts backward while in last calibrationdata viewing mode. Decreases the temperature settingwhen temperature probe is not inserted10. LEDs• Calibration: 2 points with Hanna EC and TDS calibrationsolutions.• Four different EC working ranges (0 to 199.9μS; 0 to1999μS; 0 to 19.99mS; 0 to 199.9mS).• Four different TDS working ranges (0 to 100.0ppm; 0 to1000ppm; 0 to 10.00ppt; 0 to 100.0ppt) for HI 24 series.• Possibility to switch to TDS measurements with conversionfactor from 0.00 to 1.00 (HI 24 series).• Temperature compensation of the HANNA standard solu-tions.• Temperature compensation of the EC and TDS reading withtemperature coefficient ß selectable from 0 to 10%/°C.• Use of a 3-wire Pt 100 temperature sensor to compensatefor the cable resistance and have a precise automatic tem-perature compensation of the measurements in long dis-tance applications.• Manual temperature setting when the temperature probe isnot inserted or the temperature exceeds the upper range.• Last calibration data internally recorded (nonvolatile EE-PROM memory): calibration date and time, cell constant,calibration solution values.• Input: 4-ring EC/TDS probe with cell constant 2.0 ± 10%,or 4-20mA analog input from a transmitter.• Analog output (HI 23xy1 and HI 24xy1)- isolated 0-1 mA, 10 KΩ maximum load (optional);- isolated 0-20 mA, 750 Ω maximum load (optional);- isolated 4-20 mA, 750 Ω maximum load (optional);- isolated 0-5 VDC, 1 KΩ minimum load (optional);- isolated 1-5 VDC, 1 KΩ minimum load (optional);- isolated 0-10 VDC, 1 KΩ minimum load (optional).• Real time clock.• Serial comunication via RS485 with the possibilities to setthe working parameters and to read the displayed data (HI23xy2 and HI 24xy2).• Calibration and Setup procedures allowed only throughan unlock password.