Eutech alpha pH2000D Controller / Analyzer

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Industrial Process Controllers & Monitors

alpha-pH2000D Wall Mount pH/ORP Controller

The alpha pH 2000D is used for measuring pH/ORP and temperature values. The pH values can be measured using industrial differential and combination pH/ORP sensors. The temperature values can be measured using 2-wire / 3-wire NTC300 thermistor. The controller/transmitter is available in a wall mounting enclosure. It can be used for applications such as water treatment and monitoring, galvanic-decontamination, chemical processing, food processing, clean or wastewater control and neutralization processes. Its user-friendly and safety features 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 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 +110.0 °C or +14.0 to +230.0 °F for NTC300
Resolution	0.1 ^oC or 0.1 ^oF
Relative accuracy	0.5 ^oC or 1.0 ^oF
Sensor	NTC 300 - 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 +100.0^oC or +14.0 to +212.0^oF for NTC300
Temperature value for 20mA current	0.0 to +110.0^oC or +32.0 to +230.0^oF 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 40^oC

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