EUTECH Thermo Scientific Alpha pH 2000
Built for the rugged industrial environment, the Alpha pH 2000 transmitter comes with an option for symmetrical mode of operation, making it ideal for electrically noisy environments. IP65 NEMA 4X casing is weatherproof and corrosion-resistant, protecting meter against harsh elements.
Asymmetrical Mode Works well in environments with little or no electrical noise. When there is electrical noise, the noise acts as a common signal and is picked up by both pH and reference electrodes. Since the reference electrode is grounded to the amplifier’s ground potential, electrical noise appears only on the pH electrode, causing reading fluctuations. DC source noise (e.g., from electroplating tanks) typically results in stable but incorrect values.
Symmetrical Mode Avoids reference electrode grounding by using floating differential mode. Electrical noise appears equally on pH and reference electrodes and is rejected by the operational amplifier. Requires an electrode with solution ground (potential matching) pin.
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 125.0 ºC / 14.0 to 257.0 ºF |
| Resolution | 0.1 ºC / 0.1 ºF |
| Accuracy | ±0.5 ºC / ±1.0 ºF |
| Sensor | Pt100 / Pt1000 (jumper selectable); 2 or 3 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 | BNC (1012 impedance); asymmetrical/symmetrical |
| Connection Terminal | Wall Mount: 3-pin, 8-pin, 9-pin & 13-pin terminal, detachable blocks Panel Mount: 3-pin, 9-pin & 19-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 | 250 mA, anti-surge, S504 Bussmann |
| 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) | Wall Mount: 144 x 144 x 110 mm Panel Mount: 96 x 96 x 175 mm |
| Weight | Wall Mount: 745 g (unit) / 1100 g (packed) Panel Mount: 550 g (unit) / 950 g (packed) |
| Protection Rating | Wall Mount: IP66 (NEMA 4X) Panel Mount: IP54 (front panel) |
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