ORP, Conductivity and pH Digital Analysis Transmitters

STANDARD FEATURES

• Compact Design
• Large 15 mm LCD Display Provides Clear Readability
• Easy Commissioning Due to Multi-Language, Menu-Guided Operation
• Individual Adjustment of All Measuring Parameters
• Freely Programmable, Flexible Measuring Ranges
• Easy Processing by 4-20 mA Output Signal and Alarm Relay For Use in Both Pipes and Tanks
• Installed in Custom Fittings

• Waste Engineering
• Water Treatment and Process Technology
• Cooling Water Monitoring
• Swimming Pool Engineering
• Chemical Dosing
• Electroplating

Design
The universal compact analysis transmitter can be used in solid-free liquids by simply using various types of electrodes. The transmitter produces a 4-20mA standard signal proportional to the measuring parameter and provides a freely adjustable alarm output with two relays as an option. Both signals can easily be transmitted and processed. The multi-language display and operating elements allow customized adjustment of all measuring parameters. A specially designed fitting system ensures simple and fast installation of the device into pipelines.

For Aggressive and Solid-Free Liquids Menu-Guided Operation

• 4-20 mA, 2-wire
• Multi-language
• 4-20 mA and relay, 3 wire
• Various engineering units
• Customized measuring ranges

Electrode Selection

• Three pH electrodes
• One redox electrode
• Four conductivity electrodes

On-Site Alarm Function

• Freely programmable limit values with engineering units, with two relays
• Specific application adjustment by teach-in function

Design / Principle of Operation
The analysis transmitters are equipped with two independent components, a sensor part and a transmitter part. The pH and ORP transmitters provide a replaceable combination electrode, screwed into the sensor housing with screw-in thread PG 13.5. The measured signal is conveyed to the transducer via a coax plug.

The conductivity transmitter uses sensors with different cell constants. 0.01 and 0.1 are fitted with stainless steel electrodes and those with cell constants 1.0 and 10 are fitted with graphite electrodes. The Pt1000 for automatic temperature compensation is a standard feature in the pH and conductivity sensor housings.

The microprocessor controlled electronics package provides standard current and optional relay outputs. The transmitter offers an adjustable 10-level filter function to dampen display or power fluctuations and short-term exceeded limit values. The menu-guided, multi-language parameter definition allows you to carry out system-specific on-site adjustments and process optimization.

All the fluid-contacting parts of these universal transmitters are of PVDF or electrode material, which makes them suitable for use in aggressive fluids.

The analysis transmitters require an external power of 12-30 VDC and provide a 4-20mA output signal. Two relay outputs are available for alarm functions as an option

Operation / Commissioning
Customized adjustments, such as measuring ranges, engineering units and alarm setpoints can be carried out menu-supported on site via a multi-lingual display.

Installation
The analysis transmitters can be easily installed in pipes using our specially designed fitting system. The minimal size for the pH and ORP transmitter is 3┌4". For the conductivity transmitter, it is 1". When selecting the appropriate fitting, please consider the adjacent pressure-temperature diagram, referring to the application ranges of the fitting materials. See also the temperature and pressure limit for analysis transmitters and electrodes; the operating pressure and temperature will be limited by either the installation fitting or the sensor.

Measuring Ranges, Probe Selection
PHTX820 Series
The pH transmitter is available with three different types of standard electrodes. The chart below indicates the appropriate electrode for the respective application. The lifetime of the pH electrode depends on the application. Electrodes in the PHTX820 can easily be replaced.

ORTX820 Series
The redox potential transmitter is equipped with a platinum electrode as measuring electrode. The lifetime of the electrodes strongly depends on the application.

CDTX 820 Series
The conductivity transmitter can be equipped with four different cell constants (0.01; 0.1; 1.0; 10). The cell constant is selected according to the measuring range and using the chart below. Different electrode designs are required based on the selected cell constant.

CHART KEY

v  = most suitable

vv = application dependent

x  = not suitable

How to select the most suitable pH electrode
Applications	Plastic	Lo Temp Glass	Hi Temp Glass
Waste water samples	v	v	v
General aqueous solutions	v	v
Aquariums	v	v	v
Beer, juices, wine*	vv	vv	v
Butter,cheese*		vv
Protein-containing solutions	x	x
Aqueous emulsions			v
Partly aqueous emulsions			vv
Soil, earth suspensions			v
Extreme pH values (pH<1, pH>13)	x	vv
Hydrofluoric acid containing solutions		vv
Galvanic waste water			v
Hot Lyes	x	vv
Highly viscous solutions			v
Solutions with low ion content			v
Jam*			v
Cosmetic products*			v
Varnish, colors			v
Milk*		vv	vv
Ultra pure and rain water	vv	vv	v
Cream, yogurt*		vv	vv
Brines	v	v	v
Swimming pools	v	v	v
Soaps, detergents			v
Aqueous suspensions			v
Partly aqueous solutions >10% H2O		vv	v
Partly aqueous solutions <10% H2O			vv
Temperatures 80-100°C	x	v	v
Temperatures 100-130°C	x	x	v
TRIS buffer solutions	vv	vv	v

*None of these electrodes are rated for sanitary or pharmaceutical applications.
They can be used to measure samples that are discarded after measurement.

Measuring Ranges of Conductivity Transmitter CDTX820

ELECTRODE IDENTIFICATION

Dimensions Shown in Inches (mm)
PHTX-820/ORTX-820	CDTX820

SPECIFICATIONS:

Pipe diameter:
Min: From 3/4" for pH and redox potential. Conductivity from 1"
Max: Up to 4" in plastic fittings; up to 8" in metal fittings

Ambient Temperature: 0 to 60°C
Fluid Temperature: Depending on electrodes (see electrode data) and installation fitting
Conductivity: 0 to 120°C (depending on installation fitting)
Storage Temperature: ╨10 to 80°C (14 to 176°F)
Fluid Pressure: Maximum 10 bar (145 psi), depending on electrode, temperature, and fitting material
Enclosure: IP65/ NEMA 12

Measuring Range:
pH: 0 to 14 (smallest value 0.5 pH)
ORP: ╨1000...0...+1000mV
Conductivity: 0.05µS/cm...200mS/cm (depending on cell constant)

Accuracy:
pH, ORP: 0.2% (depending on calibration)
Conductivity: 1% of measured value, typical 1µS/cm...200mS/cm
Typical: 3% of measured value (maximum 5% of measured value)

Supply voltage: 12 to 30 VDC
Output signal: 4 to 20 mA
Load: Maximum 900 ohm at 30V
Display:15 x 60 mm LCD 8 digits, alphanumeric, 15 segments, character height 9 mm
Relay output: freely programmable, 3 A 230 V
Sensor fitting: PVDF
O-rings: FPM, optional, EPDM
Electronic housing: Polycarbonate
Front plate: Polyester
Fitting: Plastic or Metal

TECHNICAL DATA	pH			Redox
Enclosure	PVC Plastic	Lo-temp Glass	Hi-temp Glass	Glass
pH & Redox Electrodes
Fluid pressure	0-0.5 bar	0-6 bar	0-3 bar	0-6 bar
Fluid temperature	0-50 C	0-90 C	0-130 C	0-90°C
Diaphragm	Zirconium dioxide ceramic
Reference electrolyte	Gel	Gel	Gel	Gel
Conductivity Electrode
Cell constant	K=0.01	K=0.1	K=1.0	K=10
Electrode material	PVDF/SS	PVDF/SS	PVDF/Graphite	PVDF/Graphite




To Order pH (Specify Model Number)
MODEL NO.	PRICE	DESCRIPTION
PHTX821	$775	pH Transmitter, PVC plastic electrode, FPM O-rings, no relays
PHTX822	775	pH Transmitter, Low-temperature glass electrode, FPM O-rings, no relays
PHTX823	775	pH Transmitter, High-temperature glass electrode, FPM O-rings, no relays
To add 2 relays (3 amp up to 220VAC), add suffix "-R" to the part number, and add $100 to the list price. To get EPDM O-rings in place of the standard FPM O-rings, add suffix "-EDPM" to part number. No additional charge.




ACCESSORIES
MODEL NO.	PRICE	DESCRIPTION
PSU-93	$40	Wall Socket Plug-in Transformer, 115 Vac in, 24Vdc out on Screw Terminals




To Order Conductivity (Specify Model Number)
MODEL NO.	PRICE	DESCRIPTION
CDTX821	$775	Conductivity Transmitter, K=0.01, FPM O-rings, no relays
CDTX822	775	Conductivity Transmitter, K=0.1, FPM O-rings, no relays
CDTX823	775	Conductivity Transmitter, K=1.0, FPM O-rings, no relays
CDTX824	850	Conductivity Transmitter, K=10.0, FPM O-rings, no relays




To Order ORP (Specify Model Number)
MODEL NO.	PRICE	DESCRIPTION
ORTX821	$775	ORP Transmitter, K=0.01, FPM O-rings, no relay




ACCESSORIES
MODEL NO.	PRICE	DESCRIPTION
PSU-93	$40	Wall Socket Plug-in Transformer, 115 Vac in, 24Vdc out on Screw Terminals
To add 2 relays (3 amp up to 220VAC), add suffix "-R" to the part number, and add $100 to the list price. To get EPDM O-rings in place of the standard FPM O-rings, add suffix "-EPDM" to the part number. No additional charge.

Display and Operation

Display in Operating Mode pH/ORP Conductivity pH/ORP Conductivity Power Power Temperature Temperature Electrode Signal Hold Function Hold Function   Calibration Function   Parameter Definition pH/ORP Conductivity Language Language Engineering Units Engineering Units Measuring Range 4-20mA Cell Constant Relay Temperature/coefficient each-in-function Filter Measuring Range 4-20mA   Relay   Filter Test pH/ORP Conductivity Alteration of basic Alteration of basic adjustment (Off-set Span) Simulation (dry-run test operation) Measured value without temperature compensation   Simulation (dry-run test operation)

Pipe Fittings for Transmitters


To Order: (Specify Model Number)
	PVC Schedule 80		PVDF		Polypropylene		Stainless Steel
Pipe Size	Model No.	Price	Model No.	Price	Model No.	Price	Model No.	Price
1/2"	FP1007	$ 85	FP1107	$200	FP1107-PO	$140	FP1007-SS	$295
1"	FP1010	85	FP1110	220	FP1110-P0	150	FP1010-SS	295
1 1/4"	FP1012	95	FP1112	240	FP1112-PO	175	FP1012-SS	195
1 1/2"	FP1015	100	FP1115	265	FP1115-PO	205	FP1015-SS	195
2"	FP1020	110	FP1120	305	FP1120-PO	250	FP1020-SS	295
2 1/2"	FP1025	115	N/A	­	N/A	­	FP1025-SS	395
3"	FP1030	135	N/A	­	N/A	­	FP1030-SS	395
4"	FP1040	160	N/A	­	N/A	­	FP1040-SS	395
6"			N/A	­	N/A	­	FP1060-SS	395
8"			N/A	­	N/A	­	FP1080-SS	395
NOTE: PCV, PVDF and polypropylene fittings up to and including 2" line size are tees with union nuts and socket-weld connections; PCV fittings from 2 1/2" through 8" are saddle fittings. SS fitting up to and including 1 1/4" line size are FNPT threaded; SS fittings from 1 1/2" through 8" line size are weld-on fittings.

U.S.A. and Canada International Callers; Sales & Service; 203.359.1660

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