| Model |
PD 650 meter |
| pH |
–2.000 to 20.000 pH |
| Ion |
0.001 to 19,900 ppm, molar, or mg/L |
| mV |
±2000 mV |
| DO |
0.00 to 90.00 mg/L (ppm), 0.0 to 600.0% |
| Temperature |
–10.0 to 110.0°C (14.0 to 230.0°F), selectable |
| pH |
0.1/0.01/0.001 pH |
| Ion |
2 or 3 digits |
| mV |
0.1 mV |
| DO |
0.01 mg/L (ppm), 0.1% |
| Temperature |
0.1°C (0.1°F) |
| pH |
±0.002 pH |
| Ion |
±0.5% full-scale (monovalent); 1% full-scale (divalent) |
| mV |
±0.2 mV |
| DO |
±0.2 mg/L; ±2.0% |
| Temperature |
±0.5°C (±0.9°F) |
| pH |
Up to 6 buffer values (select from 4 sets): USA: 1.68, 4.01, 7.01, 10.01, 12.45;
NIST: 1.68, 4.01, 6.86, 9.18, 12.45; DIN: 1.09, 2.06, 4.65, 6.79, 9.23, 12.75; or custom buffers |
| Ion |
Up to 6 points |
| DO |
Two points; 100% and 0% |
| Temperature |
Offset 0.1°C (0.1°F) increments |
| General Specification |
| DO salinity correction |
Range: 0.0 to 50.0 ppt;
Resolution: 0.1 ppt |
| DO pressure correction |
Range: 500 to 1499 mm Hg, 66.6 to 199.9 kPa
Resolution: 1 mm Hg, 0.1 kPa |
| Memory |
up to 500 sets with GLP date and time |
| Output |
infrared, IrDA |
| Real-time clock |
time-and-date stamp on calibration and stored data |
| Temperature compensation |
automatic or manual (selectable), from 0 to 100°C |
| Ambient operating temperature |
0 to 50°C (32 to 122°F) |
| Power |
four 1.5 V AA batteries (included) or optional
universal AC adapter, up to 200 hours continuous use |
| Dimensions |
| Meter |
7 1/2 "L x 3 3/4 "W x 2 1/4 "H (19 x 9.5 x 5.7 cm) |
| Boxed |
9 1/8 "L x 9 1/8 "W x 2 3/4 "H (23 x 23 x 7 cm) |
| Weight |
| Meter |
1 lb (0.5 kg) |
| Boxed |
2. lb (0.9 kg) |