EUTECH Thermo Scientific Alpha pH 2000D
The Alpha pH 2000D Controller/Transmitter and combination electrode system employs differential pH measurement technology. What’s unique about this system is the differential electrode, which uses a pH glass bulb in place of the conventional reference system, making it more resistant to contamination or fouling in harsh wastewater applications. Replaceable salt bridge and reference solution add lifespan to the electrode when junction clogs.
General: Useful for any batch or on-line type application that requires accurate pH or ORP control.
Water Treatment: Use for batch and on-line control of incoming process water, rinse water treatment, recirculating system and waste water treatment.
Industrial: Ideal for chemical processing, food processing, aquarium, pharmaceutical, hydroponics and waste control industries.
Regulatory: Hook to recorder to document data for regulatory compliance.
| Product Specification | Description |
|---|---|
| pH | |
| Range | -2.00 to 16.00 pH |
| Resolution | 0.01 pH |
| Accuracy | ±0.01 pH |
| ORP | |
| Range | -1000 to 1000 mV / 0 to 100% |
| Resolution | 1 mV / 0.1% |
| Accuracy | ±1 mV / ±0.2% |
| Temperature | |
| Range | -10.0 to 110 °C / 14.0 to 230.0 ºF |
| Resolution | 0.1 ºC / 0.1 ºF |
| Accuracy | ±0.5 ºC / ±1.0 ºF |
| Sensor | NTC 300; 2 wire |
| Compensation | Auto/manual (independent process/CAL temperature) |
| Controller Functions | |
| Set Points | SP1/SP2: -2.00 to 16.00 pH or -1000 to 1000 mV or 0 to 100% |
| pH Hysteresis | 0.1 to 1 pH |
| ORP Hysteresis | 10 to 100 mV or 1 to 10.0% |
| Control Modes | P/PI control (pulse length/pulse frequency/proportional integral); limit control; off |
| Pulse Length Period | 0.5 to 20 sec |
| Pulse Frequency | 60 to 120 pulse/min |
| Integral Action Time | 0 to 999.9 min |
| Delay | Pickup/Dropout: 0 to 2000 sec |
| Wash Cycle/Duration | 0.1 to 200.0 hr / 1 to 2000 sec |
| Contact Outputs | 1 SPDT, 3 SPST relays |
| Switching Specs | 1/8 HP at 125 VAC (max. 0.74 A / max. 93 VA) 1/8 HP at 250 VAC (max. 0.37 A / max. 93 VA) |
| Alarm Functions | |
| Mode | Steady or fleet (pulse) |
| Pickup Delay | 0 to 2000 sec |
| Switching Specs | 1/8 HP at 125 VAC (max. 0.74 A / max. 93 VA) 1/8 HP at 250 VAC (max. 0.37 A / max. 93 VA) |
| Electrical & Connections | |
| Transmitter Output | Two 0/4 to 20 mA scalable outputs for pH/ORP and temperature, galvanically isolated |
| Current Output | CU 22: 22 mA |
| Isolated Output | 12 V ±0.5 V (max. 50 mA) |
| Hold Function | Switch to freeze output current and deactivate control relays |
| Load | Max. 600 Ohm |
| pH/ORP Input | 2-pin terminal (Differential) |
| Connection Terminal | 5-pin, 8-pin, 9-pin & 13-pin terminal, detachable blocks |
| Display | |
| LCD | UV coat, backlit 14 segments display with symbols |
| Backlight | On/off selectable with four levels of brightness |
| Power Supply | |
| Input | 80 to 250 VAC/DC; 50/60 Hz; 10 VA |
| Main Fuse | 315 mA time delay, 250 V, Bussmann BK/GDC-315 mA |
| Pollution Degree | 2 |
| Transient Overvoltage Category | II |
| EMC Specifications | |
| Emitted Interference | According to EN 61326 |
| Immunity To Interference | According to EN 61326 |
| Environmental | |
| Operating Temperature | 0 to 40 ºC |
| Max. Relative Humidity | 80% up to 31 ºC decreasing linearly to 50% at 40 ºC |
| Mechanical | |
| Dimensions (WxHxD) | 144 x 144 x 110 mm |
| Weight | 950 g (unit) / 1100 g (packed) |
| Protection Rating | IP66 (NEMA 4X) |
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