| Model |
CD 650 meter |
| pH |
0 to 500.0 mS |
| TDS |
0 to 500 ppt |
| Salinity |
0 to 80 ppt |
| Resistivity |
0 to 20.00 MΩ |
| 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 |
| Conductivity |
0.05% full-scale |
| TDS |
0.05% full-scale |
| DO |
0.01 mg/L (ppm), 0.1% |
| Temperature |
0.1°C (0.1°F) |
| Conductivity |
±1% full-scale |
| TDS |
±1% full-scale |
| DO |
±0.2 mg/L; ±2.0% |
| Temperature |
±0.5°C (±0.9°F) |
| Conductivity |
Manual up to 5 points (1 per range);
automatic up to 4 points (84.0 µS/cm, 1413 µS/cm, 12.88 mS/cm, 111.8 mS/cm) |
| DO |
Two points; 100% and 0% |
| Temperature |
Offset 0.1°C (0.1°F) increments |
| General Specification |
| TDS factor |
0.40 to 1.00 |
| Cell constant |
0.100 to 10.000 |
| 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 normalization |
15 or 30°C |
| Temperature coefficient |
linear or pure |
| 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) |