Technical specifications
Application | Determination of pH value and conductivity in drinking water |
|---|---|
Measurement technology - pH | pH electrode |
Measurement technology - EC | Conductivity |
Measuring principle - pH | Potentiometry |
Measuring principle - EC | Conductivity with two graphite electrodes |
Parameters | pH value, conductivity, temperature |
Applied standard | DIN EN ISO 27888:1993 |
pH | EC | Temperature | ||
|---|---|---|---|---|
Measuring range | 0...14 pH | 0.00...5000 μS/cm | 0...65 °C | 32...149 °F |
Measuring accuracy | ± 0.06 pH | ± 40 μS/cm at 1000 μS/cm, ± 200 μS/cm at 5000 μS/cm | ± 0,5 °C | ± 32.9 °F |
Resolution | 0.01 pH | <100 = 0.01 μS/cm; <1000 = 0.1 μS/cm; >1000 = 1 μS/cm | 0,1 °C | 32.2 °F |
Repeatability precision | pH 1: 0.001; pH 7: 0.0006; pH13: 0.001 | ± 2 μS/cm at 1000 μS/cm; ± 7 μS/cm at 4000 μS/cm | - | |
Detection limit | Not | 3 μS/cm | - | |
Response time T90 / T100 | T90 rising 15 s ; T90 falling 20 s |
|---|---|
Warm-up time | < 5 min |
Stability / drift | Short-term drift 24 h: < 0.03 pH |
Long-term drift 1 week: < 0.05 pH | |
Temperature compensation | Pt1000 |
Turbidity compensation | No |
Data logger | Internal 8 GB memory |
Response time | 10 s |
Shortest measurement interval | 5 s |
Cross sensitivities | None known |
Display | 3.5 inch capacitive color touch display, 320x480 pixels |
|---|---|
Interface - digital | RS-485 (Modbus RTU), Ethernet (Modbus TCP) |
Interface - analog | - |
Power supply | 12-24 VDC (± 10 %) |
Power consumption | Typical 2 W; standby: 1.5 W |
Protection class | CLASS III |
Overvoltage category | I |
Connection | M12 hybrid industrial connector, 8-pin |
Materials | See dimension drawings (D10) in the operation instructions of the device | |
|---|---|---|
Dimensions (W/H/D) | 160 / 280 / 108 mm | 6.3 '' / 11 '' / 4.25 '' |
Weight | Approx. 3.8 kg | Approx. 8.4 lbs |
Operating conditions | ||
|---|---|---|
Operating temperature | Sample (insitu) 2...40 °C | 35.6...104 °F |
Min. internal pressure | 0.2 bar | 2.9 psi |
Max. internal pressure | 1 bar | 14.5 psi |
Inflow velocity | Min. 10 L/h | |
Transport conditions | 0...80 °C | 32...176 °F |
Storage conditions | 0...80 °C | 32...176 °F |
Protection class | IP30 | |
Maintenance effort | ≤ 0.5 h / month typical |
|---|---|
Calibration/ | pH: 4 weeks typical, EC: 6 months typical Regular cleaning, depending on the water quality |
System compatibility | TW Master, Modbus RTU, Modbus TCP |
Warranty period | 1 year (EU & USA: 2 years) |