| Model |
pH 620 meter |
| pH |
–2.000 to 19.999 pH |
| Ion |
0.001 to 19,900 ppm, molar, or mg/L |
| mV |
±2000 mV |
| 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 |
| 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 |
| 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 |
| mV |
Offset up to ±150 mV |
| Temperature |
Offset 0.1°C or 0.1°F increments |
| 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 500 hours continuous use |
| Dimensions |
|
Meter
|
7 1/4 "L x 3 1/4 "W x 2 1/4 "H (18.4 x 8.3 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) |