| Product name |
Industrial pH meter |
| Model |
HP-480PL |
| Measuring range |
pH 0 to 14: resolution of 0.01 pH
Temperature 0 to 100: resolution of 1 °C (selectable) |
| Transmission output |
4 mA to 20 mA DC, input / output isolated type
Maximum load resistance 900 Ω
Transmission output range: freely selectable within the measurement range |
| Repeatability |
Within ±0.05 pH of the full scale (by equivalent input) |
| Linearity |
Within ±0.05 pH of the full scale (by equivalent input) |
| Contact output |
Output: 2 points
Alarm contact output (R1 and R2)
Contact type: relay contact, SPST-NO (1a)
Contact capacity: 240 VAC, 0.3 A and 100 VDC, 0.3 A (resistance load)
Contact function: selectable from upper / lower limit operation (ON / OFF control), alarm, and maintenance. |
| Control action |
· ON / OFF control
· Pulse proportional control |
| Calibration function |
Two-point automatic calibration or manual calibration
Temperature calibration (one point) |
| Transmission output hold function |
· Just before hold
· Optional value hold
· Continuous
Selectable from the above (However, only the just before hold is available in the maintenance mode.) |
| Self-diagnosis function |
· Calibration failure
· Electrode self-check
· Outside of the measuring range
· Transducer error |