The CD Conductivity Transmitter is state-of-the-art solid state high impedance amplifier which interfaces the low current conductivity signal to digital process indicators or other slave instruments. Switchable spans from 1µS to 50000 µS can be set up within the 0 to 1999 digital readout scale. With NTC Automatic temperature compensation the transmitter ensures high accuracy under all temperature conditions. The features of this instrument make it suitable for water treatment plants and other process applications.
FEATURES
Accurately tested to measure Conductivity parameters
Designed to withstand the arduous conditions found in industrial environments, whilst retaining accuracy and sensitivity of laboratory instruments.
Temperature compensation fixed or automatic
Can be surface mounted close to the sample point or inside a control panel
Virtually immune to AC line noise, switching spikes and fluctuations shocks and vibration stresses, temperature and humidity variations
Easy-to-connect high impedance push fix connectors for solderless wiring
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The conductivity input can be low or high Ohmic giving a high degree of protection against electrical interference
Output currents for electronic or pneumatic slave instruments
(Operation of Pneumatic instruments needs an additional E/P convertor)
Comprehensive test and reliability procedures ensure long term Reliability and sustained high performance
Robust, fully enclosed shielded metal case keeps out dust, dirt and chemical contaminations.
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The Alchemie Conductivity Cell is a robust and accurate platinized cell. These highly repeatable cells provide accurate readings with fast response time. As applications demand reliable sensors, the performance of a typical Conductivity Cell depends upon the Platinum Black coating to produce a stable and constant voltage independent of the process conditions. Alchemie Conductivity cells stand up to these stringent specifications.
The CD Conductivity Housing has the widest available range of conductivity cell and NTC automatic temperature compensator options, making it ideal for high-purity water measurement with solution ground. The ultrasonic cleaner option is a plus for processes with deposit problems. The housings are available in SS316, Polypropylene and Teflon with numerous mounting configuration options, including in-line and immersion mountings. A guard ring tube protects the conductivity cell input from electrical leakages occuring due to submersed electrical equipment.
Transmitter Specifications :
| Analog
Input |
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Configuration : |
Floating differential
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Bias voltage : |
400mV precision AC 1000Hz or 100Hz Selectable
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Input Impedance : |
>10
12
Ohms
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| Analog
Output |
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Full Scale Measuring Ranges /cm : |
(0 - 1 µS) / (0 - 5 µS)
(0 - 10 µS) / (0 - 20 µS )
(0 - 50 µS) / (0 - 100 µS )
(0 - 200 µS) / (0 - 1000 µS )
(0 - 10000 µS) / (0 - 50000 µS )
1 µS = 1MU = 1 µ mho.
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Output Current : |
0 - 20 mA DC Dead Zero ; convertable to 0 - 5 V DC
4 - 20 mA DC Live Zero ; convertable to 1 - 5 V DC
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Max. Load resistance : |
500 Ohms (10 V) at 300 meters.
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| Signal Conditioning |
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Temperature Compensation : |
Automatic between -10°C to +150°C using NTC (Negative Temperature Co-efficient compensator "ACX 140"
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Measuring Frequency : |
1000 Hz for Scale of 1000 µS and above
100 Hz for Scale of 1000 µS and below
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Cell Constants : |
0.01, 0.1, 1, 10 cm-1
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| Accuracy & Stability |
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Linearity : |
Linearity error less than ± 1% FSD
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Reproducibility : |
Better than ± 1% FSD
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Stability : |
Drift after 1 hour of operation better than 0.01% FSD in 24 hours
With fluctuating ambient temperature better than ± 0.25% FSD/10°C
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Common mode range : |
Max. ± 10V DC ± 10V AC (Peak value)
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Influence of load variation : |
< 0.1% FSD for 500 Ohms change.
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Power : |
230 Volts AC single phase / 110 volts AC single phase
24V DC +20% -10%
3 Watts maximum
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| Environmental, Physical & Reliability |
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Temperature Range : |
Operating 0°C to 60°C
Storage -25°C to 85°C
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Relative Humidity : |
0 to 95% non-condensing
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Warm up Time : |
5 minutes
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Over voltage : |
Power : 260 volts max. 200 volts min.
Input : 2 volts max.
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Case : |
Die Cast aluminium, weather and splash proof
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Mounting : |
Surface mounting or Panel mounting on three bolts.
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| Digital Display |
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Local Digital Readout : |
3 ½ digit (LED or LCD) 0.5" height 7 segment display
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