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// MediciÓn Continua - PH-ORP-ION ESPECIFICO-CONDUCTIVIDAD-OD - Transmisores de 2 Hilos - MODELOS T23/ T28

T23 Series Transmitters


Features

Benefits

Choice of multiple measurement parameters

Measure pH, ORP, Specific Ion, Dissolved Oxygen, Conductivity and Resistivity

Two Channel Capability         

Lower cost with multi sensor operation

SENTINEL Diagnostics  

Predictive sensor diagnostics reduces down time

Isolated Outputs

Protects overall system inputs and outputs

Auto Buffer Calibration     

Ease of Maintenance

24 VDC loop-powered or 110/220 VAC power option     

Minimize wiring & overall installation cost

Multiple Mounting Configurations

Pipe, Wall, Handrail, or Panel Installation choices


Description

The Model T23 two-wire transmi2er provides simplicity in a powerful package. A choice of measurement parameters
include: pH, ORP, Specific Ion, Dissolved Oxygen, Conductivity and Resistivity.

MULTI-CHANNEL CAPABILITY allows theModel T23 to Accept up to two sensor inputs, each having temperature
compensa1on, and provides up to three selected outputs.
Any combination of pH, ORP, Specific Ion, or Dissolved Oxygen can be accepted as an input. (Conductivity or
Resistivity transmiters are only available as single channel units).

The SENTINEL is the next generation sensor technology.
By utilizing the “SENTINEL” sensor reference diagnostics, the user can easilymonitor the reference electrode’s degradation due to depletion or process contamination.
The “prephault” indication is clearly displayed as a bar graph on the main process menu (or as an op1onal output).
The bar graph willflash when it is 1me to replace an electrode. This feature allows just in 1me delivery of the consumable component of the sensor, eliminating unforeseen downtime.

Specifications

Measurement Range

Output

 Repeatability

pH: -2 to 14.5 Ph
ORP: -1000 to 1000Mv
Specific Ion: 1 to 1000 ppb, ppm, ppt
Dissolved O2: 0 to 40 ppm, mg/l or % saturation
Conductivity: 0 to 2 Siemens
Resistivity: 0 to 2 meg-ohms
0 to 2 meg-ohms

4-20 mA or 20-4 mA, linear and expandable. Up to a maximum of three outputs.

+/- 1.0% mV

Display

Input Power

Response Time

Menu driven, 32 character alphanumeric, Supertwist LCD. The main menu simultaneously displays; (1) Process Identity, (2) Process Value and Engineering Units, (3) Percent Output, (4) Temperature in °C or °F.

+24 VDC nominal (13.5 to 50 VDC) Optional 110/220 VAC @ 50-60Hz

T90 in 1 second

Operating Temperature

Relay Ratings (optional)

Noise Rejection 50/60 Hz

-20° C to 70° C (-4°F to 158°F)

5A @ 250VAC/ 5A @ 30VDC resistive max.(2) SPDT

Greater than 70 db

Temperature Compensation

Max Loop Impedance

Input / Output Isolation

Automatic with RTD, -30°C to 140°C (-22°F to 284°F) Accuracy within +/- 0.1°C from 0° to 100°C (32° F to 212  °F).

525 ohms @ 24 VDC for 4-20 mA compliance on primary output; approximately 800 ohms on secondary outputs.

Maximum 300 volts between process input and any 4-20 mA output (single and multiple channel outputs). No Isolation between inputs on multiple channel instruments.

 

Accuracy

Enclosure

 

 

+/- 0.10% of full scale

NEMA 4X, weatherproof, ½ DIN,
(L x W x D) 5.7” X 5.7” X 3.0” (14.4cm X 14.4cm X 8.9cm)

 

 

Linearity

 

 

+/- 0.05% of full scale

Shipping Weight

 

 

Sensitivity

 

1.6 lbs (0.7Kg)

 

 

+/- 1.0 mV

 

 



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T28 Series  Transmitters
 

STATE-OF-THE-ART TECHNOLOGY...
The Model T28 microprocessor-based two-wire transmitter provides ergonomic simplicity housed in a powerfully designed package! A choice of measurement parameters include pH, ORP, specific Ion, Dissolved Oxygen, Conductivity or Resistivity.

MICROPROCESSOR DESIGN
The microprocessor based design of the T28 transmitter provides enumerable benefits.
A “state of the art” circuit board design eliminates the need for a battery backup by retaining the calibration and selected data in the event of unexpected power outages.
Incorporating a manual output mode enables the user to select and hold a 4-20 mA value preventing pump or recorder actuation during calibration. A “back to factory” default allows the transmitter to be returned to the programmed parameters as originally configured at ECD’s manufacturing facility.

VERSATILE DIGITAL DISPLAY
A 24-character supertwist alphanumeric Liquid Crystal Display (LCD) is used for operational and diagnostic menus. The LCD module can be rotated to accommodate a variety of installation/viewing angles. The
contrast is adjustable for different intensities to enhance day/night visibility. The main menu displays the process identification, variables (in engineering units), % output and temperature in degrees Celsius or Fahrenheit.

HAZARDOUS LOCATIONS
The T28 transmitter is FM and CSA approved for intrinsically safe and explosion proof applications. This allows the transmitter to be installed into class I, II, and III, Division I Groups A through G hazardous environments.

ENCLOSURE
The T28 is enclosed in a 300 series stainless steel - NEMA 7C housing. The enclosure incorporates sealed and isolated wiring and electronics compartments. A universal style mounting bracket allows for easy wall or pipe mounting utilizing the same hardware. ECD’s compact electronic transmitter module can be easily unplugged from the housing for bench calibration or additional diagnostic routines.

Process Transmitter T28 Specifications
MEASURING PARAMETERS & RANGES






PH

TEMPERATURE COMPENSATION

-2.00 pH to 15.00 pH, fully expandable and reversible, standard

Automatic. -30 to + 140°C, RTD. Accuracy within +/- 1% over a 0°C – 100°C span.

ORP

INPUT/OUTPUT ISOLATION

+1000 to -1000 mV, fully expandable and reversible, standard. (+2000 to -2000 mV optional)

Maximum 300 volts between process input and 4-20 mA output.

ESPECIFIC ION

MEMORY

Auto Ranging from ppb through parts/thousand. Concentration range 1 to 999.00 of the Molar calibration range or 0.1 to 9,999 ppm (5 decades)     

Non-Volatile, EEPROM.

DISSOLVED OXYGEN (DO)

POWER SUPPLY (OPTIONAL)

0 to 200% saturation or 0 to 20 ppm, full expandable and reversible.

115 VAC, 50/60 Hz, 0.5 amp.
UL Approved, Unfused and encapsulated, mounts inside wiring chamber of T28

CONDUCTIVITY

OPERATING TEMPERATURE

1 microsiemen to 1.5 siemens

-4°F to + 158°F (-20°C to + 70°C)

RESISTIVITY

DISPLAY

0 to 2 megohms
0 to 20 megohms
0 to 50 megohms

Menu driven, 24 character alphanumeric, Supertwist, High Temp LCD. Internally rotates +/- 180° for best viewing angle. The main menu simultaneously displays:
Process identity
Process value (in engineering units)
Current output (0 to 100%)
Temperature in °C or °F

TEMPERATURE

ENCLOSURE

-30°C to + 140°C

FM and CSA approved EXPLOSION PROOF for use in class I, Division I, Groups C through G with proper sealing fittings. 300 series Stainless Steel NEMA 7C Electronics; FM approved Intrinsically safe for use in Class I, II, and III Division 1, Groups A through G.
Diameter X Length (8.7 cm X 12.5 cm).

OUTPUT

WEIGHT

4-20 mA or 20-4 mA, linear, field expandable and reversible.  

Standard T28:           6.5lbs. (2.95 Kg)
Shipping Weight:     7.5lbs. (3.4 Kg)

POWER

 

(with zero loop impedance)
Recommended 24 VDC
Maximum 50 VDC
Minimum 14 VDC
Maximum Loop Impedance (24 VDC) 500 ohms for 4-20mA compliance.

 


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Av. Rivadavia 11088 P.6° Dto.”B” (C1408AAX) Capital Federal - Argentina
Tel. /Fax (+54) 011 4644-0825 / 4644-1376