Home Corporate Information What's New Our Products Support Contacts
 
E-Brochure
Instruction Manual
CE Certificate
Installation Guide
Technical Specifications
 
Industrial Process Controllers & Monitors

alpha-pH2000D Wall Mount pH/ORP Controller

The alpha pH 2000D is used for measuring pH and temperature values. The pH values can be measured using industrial differential and combination pH sensors. The temperature values can be measured using 2-wire / 3-wire Pt100 / Pt1000 sensors or NTC300 thermistor. The transmitter is available in a wall mounting enclosure. The controller / transmitter can be used for applications such as water treatment and monitoring, galvanic-decontamination, chemical processing, food processing, clean or wastewater control and neutralization processes. This transmitter has many user-friendly and safety features which include:
• Push-button for calibration and sensor offset adjustment from the keypad.
• Built-in non-volatile memory to ensure that calibration and other information are not erased if power supply fails.
• Menu-driven program that simplifies set-up.
• Automatic temperature compensation (ATC).
• Manual temperature compensation setting without the ATC probe, with independent setting for calibration and process temperature.
• Two galvanically isolated current outputs 0/4...20mA.
• Two switching contacts as set-point relays.
• 0 to 2000 seconds time delay adjustment on all relays – minimizes false alarms.
• Separately adjustable high and low set-point hysteresis (dead bands) prevent chattering of relays around the set points.
• Three control modes: limit controller, P controller and PI controller (P/PI controller as pulse length or pulse frequency).
• Large dual display LCD for easy reading with clear multiple annunciators, alarm status, operational and error messages.
• Separate alarm relay that alerts user to set point limits exceeded for a certain time and if the Pt100/Pt1000 or NTC300 thermistor wires are broken or disconnected during the ATC function.
• Wash relay.
• Hold function to freeze output current (0/4...20mA) and release control relays.
• LED indicators signal control activities to visually monitor transmitter status from a distance.
• Protection against electromagnetic interference.
• Back lit and UV light protected LC display.

Find out more about pH Differential Measurements

Applications

General: Useful for any batch or on-line type application that requires accurate pH or ORP control.

Water Purification/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.

Specifications of alpha-pH2000 Analyzer

PRODUCT CODE : EC-PHCTP2000D
(a) pH
pH Measuring Range -2.00 to 16.00 pH
Resolution 0.01 pH
Accuracy ± 0.01 pH
(b) mV
mV Measuring Range -1000 to 1000 mV
Resolution 1 mV
Accuracy ± 1 mV
(b) mV percentage
Percentage mV Measuring Range 0 to 100% (for -100 to 100 mV)
Resolution 0.1%
Accuracy ± 0.2 % (or ± 1 mV)
(c) Temperature
Temperature measuring range -10.0 to +125.0 oC or +14.0 to +257.0 oF for pt100/pt1000-10.0 to +110.0 oC or +14.0 to +230.0 oF for NTC300
Resolution 0.1 oC or 0.1 oF
Relative accuracy 0.5 oC or 1.0 oF
Sensor NTC 300, Pt100 or Pt1000 (Jumper Selectable) –  2 wire or 3 wire
Compensation Automatic (± 10 ˚C/ ± 18 ˚F offset adjustment) or Manual
   
Set-point and control function – Relay 1 & Relay 2
Function Switchable- Selection in Control (CNTR) function of Setup OffLimit ControlP/PI Control (Pulse length / Pulse frequency)
(a) Off
The control function of the controller is off SP1 & SP2 function will not appear in setup when Off is selected in CNTR function to off mode
(b) Limit Control & P/PI Control
Relay contact selection for active mode Energise (EN) orDe-energise (DEEN)
Set Point 1 (SP1) -2.00 to 16.00 pH or 0 to 100% or -1000 to 1000mV
Set Point 2 (SP2) -2.00 to 16.00 pH or 0 to 100% or -1000 to 1000mV
Active mode selection  (for SP1 & SP2) LO (Relay is active when measured value < set point)HI (Relay is active when measured value > set point)
Hysteresis  (for SP1 & SP2) 0.1 to 1 pH or 1 to 10.0%/ 10 to 100 mV
On (pickup) Delay  (for SP1 & SP2) 0 to 2000 seconds
Off (Dropout) Delay  (for SP1 & SP2) 0 to 2000 seconds
(c) P/PI Control only
Proportional Range 10 to 500 %
Integral Action Time (IAT) 0.0 to 999.9 minutes
(c) (1) Pulse Length Control (PLC)
Pulse Length 0.5 to 20.0 seconds
(c) (2) Pulse Frequency Control (PFC)
Pulse Frequency 60 to 120 pulses / minutes
Contact Outputs Two SPST relays
Switching Voltage / Current / Power Max 250VAC / Max 3A / Max 600VA
 
Wash Function – Wash Relay
Relay contact selection for active mode Energise (EN) orDe-energise (DEEN)
Wash Cycle Interval 0.1 to 200.0 hours
Wash Duration 1 to 2000 seconds
Contact Outputs One SPST relay
Switching Voltage / Current / Power Max 250VAC / Max 3A / Max 600VA
 
Alarm Function – Alarm Relay
Alarm Delay 0 to 2000 seconds
Alarm control Steady  or  leet (pulse)
Contact Outputs One SPDT relay
Switching Voltage / Current / Power Max 250VAC / Max 3A / Max 600VA
   
Transmitter Function
(a) Current Output 1 – pH/mV Proportional to pH/mV measured
Current output selection 4 – 20mA or 0 – 20mA
pH/mV value for 0 or 4mA current -2.00 to 16.00 pH or 0 to 100% or -1000 to 1000mV
pH/mV value for 20mA current -2.00 to 16.00 pH or 0 to 100% or -1000 to 1000mV
CU22 function On - 22mA current output for over range or under range or if outside zoom settingOff - 0 or 4 mA current output for under range or below lower zoom setting - 20mA current output for over range or above upper zoom setting
(b) Current Output 2 - Temperature Proportional to Temperature measured
Current output selection 4 – 20mA or 0 – 20mA
Temperature value for 0 or 4mA current -10.0 to +115.0oC  or  +14.0 to +237.0oF for pt100/pt1000-10.0 to +100.0oC  or  +14.0 to +212.0oF for NTC300
Temperature value for 20mA current 0.0 to +125.0oC  or  +32.0 to +257.0oF for pt100/pt10000.0 to +110.0oC  or  +32.0 to +230.0oF for NTC300
   
Voltage Output & Hold Function Switch
+12 V Output 11.5 to 12.5 V Output - Max 50 mA
Hold Function Switch Hold function to freeze output current (0/4...20mA) and release control relays
   
Display
LCD UV coat, backlit 14 segments display with symbols for status information
Back light On/Off selectable with four levels of brightness control
   
Power Supply
Input 80 to 250VAC/DC,  50/60Hz,  Approximately 10VA
Main Fuse 315mA Time Delay, 250V, Bussmann BK/GDC-315mA
Pollution Degree 2
Transient Voltage Category II
Connector 5-pin screw terminal
   
Electrical data and Connections
pH/mV Input 8-pin Screw Terminal (3.5mm pitch)
Temperature Input 8-pin Screw Terminal (3.5mm pitch)
Relay 1, Relay 2, Wash Relay & Alarm Relay 9-pin Screw Terminal (7.62mm pitch)
Current Output 1, Current Output 2, 12V output & Hold function switch 13-pin Screw Terminal (3.5mm pitch)
Connection terminal 5-pin, 8-pin, 9-pin & 13-pin terminal connectors
   
Mechanical Specifications  
Dimensions (W x H x D)  -  Wall Mount 144 x 144 x 111.5 mm
Weight   - Wall Mount 950g (unit)  /  1100g (Packed)
Environmental Rating   - Wall Mount NEMA 4X, IP65
   
Electromagnetic Compliance (EMC) Specifications
Emitted Interference EN 61326
Immunity to Interference EN 61326
   
Environmental Conditions
Ambient Temperature operating range 0 to 40 oC
Maximum Relative Humidity 80% up to 31 oC decreasing linearly to 50% at 40oC

Assembly Accessories

Product Description

Order Code

pH Differential Electrode with NTC300 thermistor

ECFP21A1A1

ORP Differential Electrode with NTC300 thermistor

ECFR21A1A1

 Note: Above pH/OR electrodes can withstand a pressure up to 6 bar pressure. These electrodes have integral 3m measuring cable.

Find out more about pH Differential Measurements

Thermo Fisher Scientific Inc.