Hanna Instruments HI 23 Series Instruction Manual page 6

• Calibration and Setup procedures allowed only through
• Calibration: 2 points with Hanna EC and TDS calibration
• Four different EC working ranges (0 to 199.9µS; 0 to
• Four different TDS working ranges (0 to 100.0ppm; 0 to
• Possibility to switch to TDS measurements with conversion
• Temperature compensation of the HANNA standard solu-
• Temperature compensation of the EC and TDS reading with
• Use of a 3-wire Pt 100 temperature sensor to compensate
• Manual temperature setting when the temperature probe is
• Last calibration data internally recorded (nonvolatile EE-
• Input: 4-ring EC/TDS probe with cell constant 2.0 ± 10%,
• Analog output (HI 23xy1 and HI 24xy1)
• Real time clock.
• Serial comunication via RS485 with the possibilities to set
6
an unlock password.
solutions.
1999µS; 0 to 19.99mS; 0 to 199.9mS).
1000ppm; 0 to 10.00ppt; 0 to 100.0ppt) for HI 24 series.
factor from 0.00 to 1.00 (HI 24 series).
tions.
temperature coefficient ß selectable from 0 to 10%/°C.
for the cable resistance and have a precise automatic tem-
perature compensation of the measurements in long dis-
tance applications.
not inserted or the temperature exceeds the upper range.
PROM memory): calibration date and time, cell constant,
calibration solution values.
or 4-20mA analog input from a transmitter.
- 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).
the working parameters and to read the displayed data (HI
23xy2 and HI 24xy2).