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- Range
+ pH: -2.0 to 16.0 pH; -2.00 to 16.00 pH; -2.000 to 16.000 pH
+ ISE & ORP: ±999.9 mV (ISE & ORP); ±2000 mV (ISE & ORP)
+ EC: 0.00 to 29.99 µS/cm; 30.0 to 299.9 µS/cm; 300 to 2999 µS/cm; 3.00 to 29.99 mS/cm; 30.0 to 200.0 mS/cm; up to 500.0 mS/cm actual conductivity
+ TDS: 0.00 to 14.99 ppm; 15.0 to 149.9 ppm; 150 to 1499 ppm; 1.50 to 14.99 g/L; 15.0 to 100.0 g/L; up to 400.0 g/L actual TDS (with 0.80 factor)
+ NaCl: 0.0 to 400.0% NaCl
+ Temperature: –20.0 to 120.0 ºC (pH, EC range)
- Resolution
+ pH: 0.1 pH; 0.01 pH; 0.001 pH
+ ISE & ORP: 0.1 mV (±999.9 mV); 1 mV (± 2000 mV)
+ TDS: 0.01 ppm; 0.1 ppm; 1 ppm; 0.01 g/L; 0.1 g/L
+ NaCl: 0.1% NaCl
+ Temperature: 0.1 ºC
- Accuracy@ 20°C
+ pH: ±0.01 pH; ±0.002 pH
+ ISE & ORP: ±0.2 mV (±999.9 mV); ±1 mV (±2000 mV)
+ EC: ±1 % reading (±0.05 µS/cm or 1 digit, whichever greater)
+ TDS: ±1% of reading (±0.03 ppm or 1 digit, whichever greater)
+ NaCl: ±1% of reading
+ Temperature: ±0.4 ºC (excluding probe error)
- Calibration
+ pH: up to five point calibration, seven standard buffers available (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45), and two custom buffers
+ EC: two point calibration; one point slope calibration; six buffers available: 84.0, 1413 µS/cm; 5.00, 12.88, 80.0, 111.8 mS/cm; one point offset: 0.00 µS/cm
+ NaCl: one point with HI 7037L standard (optional)
Probes pH HI 1131B glass body pH electrode with BNC connector and 1 m cable (included)
+ EC: HI 76310 platinum four ring conductivity/TDS probe with built-in temperature sensor and 1 m cable (included)
+ Temperature: HI 7662 temperature probe with 1 m cable (included)
Relative mV Offset: ±2000 mV
Temperature Compensation: manual or automatic from: -20.0 to 120.0 ºC (pH range) -20.0 to 120.0 ºC (EC range) (can be disabled on conductivity range to measure actual conductivity)
Cond. Temp.
Coefficient: 0.00 to 6.00 %/ºC (for EC and TDS only) default value is 1.90 %/ºC
TDS Factor: 0.40 to 0.80 (default value is 0.50)
Input Impedance: 10^12 ohms
PC Connectivity: opto-isolated USB
Log on Demand: 200 records
Log Interval Feature: 500 records; 5, 10, 30 sec and 1, 2, 5, 10, 15, 30, 60, 120, 180 min stability logging (“StAb”)
Power Supply: 12 VDC
Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions: 235 x 218 x 108 mm (9.2 x 8.5 x 4.2”)
Weight: 1.3 Kg (2.9 lb); kit with holder 2.1 Kg (4.6 lb.)
Order Information: HI 2550-02 (230V) are supplied with HI 1131B pH electrode, HI 76310 conductivity/TDS probe, HI 7662 temperature probe, HI 76404N electrode holder, HI 70004 pH 4.01 buffer solution sachet, HI 70007 pH 7.01 buffer solution sachet, HI 7071S electrolyte solution (30 mL), 12 VDC adapter and instruction manual.
