Hanna Instruments HI2550 - Page 7

7
ACCURACY
@ 20 °C / 68 °F
±0.01 pH
±0.002 pH
±0.2 mV (±999.9 mV)
±1 mV (±2000 mV)
±1 % reading (±0.05 µS/cm or 1 digit,
whichever is greater)
±1 % of reading (±0.03 ppm or 1 digit,
whichever is greater)
±1% of reading
±0.4 ºC (excluding probe error)
Rel mV offset range ±2000 mV
pH Calibration
1, 2, 3, 4 or 5 point calibration,
7 standard buffers available
EC Calibration
1 point slope calibration;
6 buffers available:
84.0, 1413 µS/cm
5.00, 12.88, 80.0, 111.8 mS/cm
1 point offset: 0.00 µS/cm
NaCl Calibration 1 point with HI7037L buffer (optional)
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
Conductivity
temperature
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)
pH Electrode HI1131B
EC Probe HI76310
Temperature probe HI7662
Input impedance
(BNC input)
10
12
ohms
Log on demand feature 200 records
Log Interval feature
500 records Stability logging (”StAb”),
5, 10, 30 sec
1, 2, 5, 10, 15, 30, 60, 120, 180 min
PC communication Optoisolated USB
Power supply 12 VDC adapter
Dimensions 235 x 222 x 109 mm (9.2 x 8.7 x 4.3”)
Weight 1.3 Kg (2.9 lb); kit with holder 2.1 Kg (4.6 lb)
Environment
0 – 50 ºC (32 – 122 ºF)
max. 95% RH non‑condensing
Warranty 2 years