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A benchtop microprocessor conductivity, TDS, salinity and temperature meter for purified and process water, boiler and cooling water, effluent, seawater and brines, food and beverage samples, and teaching laboratories. One conductivity cell gives three readings: conductivity from 0 to 1000 mS/cm, TDS from 0 to 200 ppt and salinity from 0 to 50 ppt. Each is shown with the sample temperature on a 16 × 2 backlit LCD.
Range selection is automatic across six conductivity ranges, from 0 to 20 µS/cm up to 200 to 1000 mS/cm, with 0.1 µS/cm resolution. The cell constant can be entered directly, or measured by the meter in a standard solution of known conductivity. The temperature coefficient (0 to 4 % per °C) and the reference temperature (25 °C or 20 °C) are set by keys, and the TDS factor (0.50) and salinity factor (0.75) can be adjusted.
Six soft-touch keys run the menus. The meter stores 1000 readings, each with the date and time from its real-time clock. It prints them, all at once or by date, through the Centronics parallel port, or sends them to a computer over RS-232. The meter is calibrated before dispatch.
For industrial and laboratory use only, not for clinical use.
Supplied with
- Instrument
- Conductivity / TDS cell
- Pt-100 temperature probe
- Electrode holder with stand
- RS-232 cable
- Operation manual
Measurement
- CalibrationCell constant by value, or by measurement in a standard solution · TDS factor set by keys · Salinity factor set by keys · Temperature 2-point against a temperature calibrator (set at the factory)
- Range0 to 1000 mS/cm in 6 ranges · 0 to 200 ppt in 5 ranges · 0 to 50.0 ppt · −20.0 to +200.0 °C
- Range selectionAutomatic: 0 to 20 µS/cm, 20 to 200 µS/cm, 0.2 to 2 mS/cm, 2 to 20 mS/cm, 20 to 200 mS/cm, 200 to 1000 mS/cm · Automatic: 0 to 20 ppm, 0 to 200 ppm, 0 to 2 ppt, 0 to 20 ppt, 0 to 200 ppt · — · —
- Resolution0.1 µS/cm · 0.1 ppm · 0.1 ppt · 0.1 °C
- Accuracy±0.5 % of range ±1 digit · ±1 % of range ±1 digit · ±0.5 % of range ±1 digit · ±0.2 %
- Temperature compensationAutomatic with the Pt-100 probe for samples from 0 to 70 °C, or a manual temperature set by keys when the probe is not connected
- Temperature coefficientAdjustable, 0 to 4 % per °C (2.00 % by default), referred to 25 °C or 20 °C
- InputConductivity cell (supplied) · Same cell · Same cell · Pt-100 probe on a 3-pin socket (supplied)
- Cell constantAdjustable: enter the known value, or let the meter measure it in a standard solution
- Conversion factor— · 0.50 by default, adjustable · 0.75 by default, adjustable · —
General
- Form factorBenchtop
- Display16 × 2 alphanumeric backlit LCD
- Power230 V ±10 % AC, 50 Hz
Data and connectivity
- Display formatTemperature with conductivity, TDS or salinity, together on the two lines
- Keypad6 soft-touch membrane keys (STORE, PRG, INC, DEC, ENT, ESC) plus ON/OFF
- Memory1000 readings, each with date and time; recall on the display or clear from the menu
- ClockReal-time clock, 24-hour, with date
- InterfaceRS-232 serial (9-pin) and Centronics parallel (25-pin), for a printer or a computer
- Serial settings1200, 2400, 4800 or 9600 baud; 8 data bits, no parity, 1 stop bit
- PrintingAll stored readings, or the readings of a chosen date
- Error indicationT-ERROR when the sample is below 0 °C or above 70 °C; CAL ERROR / RECAL when the low and high calibration temperatures are less than 20 °C apart; FUL when the memory is full