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Model DS1200-PDT - Dewpoint Hygrometer

General Overview

Thank you for purchasing the 

Alpha Moisture Systems Model DS1200-PDT Dewpoint

Hygrometer. 

We hope that you will agree that this instrument is easy to set up and very user friendly to 

operate giving you reliable and accurate measurements quickly and efficiently.

The 

Model DS1200-PDT Dewpoint Hygrometer

is a global popular choice of Dewpoint 

Hygrometers (trace moisture analysers) that work on a basis of polymer sensors and are 

used for the determination of moisture in most gases in the dewpoint or RH range.

They consist of a separately installed measuring cell of high grade stainless steel (available 

through your local distributor or Alpha Moisture Systems where there is no distributor for

your location) a Transmitter and Control-Display, that can be integrated in a Gas Handling

System*, and an in-line process source. 

The 

Model DS1200-PDT Dewpoint Hygrometer

is installed as a single channel analyser.

For additional accessories and parts, or technical help for the 

Model DS1200-PDT

, or any 

other Alpha Moisture Systems products, please contact your local distributor or contact 

Alpha Moisture Systems - see last page for details.

*Alpha Moisture Systems can manufacture to your specifications a Gas Sample System to

suit your exact requirements, please contact your local distributor for more information.

Visit our website www.amsystems.co.uk for more information.

Содержание DS1200-PDT

Страница 1: ...Model DS1200 PDT Dewpoint Hygrometer 40 30 Cdp 50bar maximum pressure 60 20 Cdp 50bar maximum pressure User Manual English ...

Страница 2: ...Model DS1200 PDT Dewpoint Hygrometer CERTIFICATE No FM35600 BS EN ISO 9001 2015 ...

Страница 3: ...is a step by step instruction manual to help you successfully set up correctly the Model DS1200 PDT Dewpoint Hygrometer before use This manual should be kept with the instrument for future reference You must observe the safety information on pages 6 and 10 before installation Please read this manual carefully from the start ...

Страница 4: ...alling the Instrument into a Panel 8 Wiring DS1200 Power Supply 8 PDT Transmitter Cable 8 Alarm Cable 9 Analogue Output Cable 9 DS1200 Connections 9 PDT Connections 10 Installing the Model PDT in a Air Gas Sampling System 10 11 Piping Installation Schematic 11 12 Installing and Commissioning the Model PDT Transmitter 13 Setting the Alarm Trip Points 13 Dimensions 14 Specifications 15 16 Contact Inf...

Страница 5: ...uring cell of high grade stainless steel available through your local distributor or Alpha Moisture Systems where there is no distributor for your location a Transmitter and Control Display that can be integrated in a Gas Handling System and an in line process source The Model DS1200 PDT Dewpoint Hygrometer is installed as a single channel analyser For additional accessories and parts or technical...

Страница 6: ...as this may cause personal injury damage to the instrument and sensor or cause risk of fire Do not connect the Model DS1200 PDT to any other device that is not recommended in this manual Ensure that the Model DS1200 PDT does not come into direct contact with water or any other liquids See IP NEMA protection in the product specifications To avoid the risk of electric shock risk of damage or fire these...

Страница 7: ...ion Label with Serial Number Cable Connection Features of the Model DS1200 PDT DS1200 Control Display The Model DS1200 PDT is a single channel analyser DS1200 has a 4 digit 14 segment LED display DS1200 has 2 adjustable Alarm set points and an analogue output See pages 9 and 13 DS1200 has mA Output terminals 11 and 12 Universal Voltage Supply terminals 31 32 PDT Transmitter Ranges available 40 to ...

Страница 8: ...5 0 45 6mm DIN 43700 The maximum panel thickness is 10mm and if an effective IP65 weatherproof seal is required the minimum recommended panel thickness is 1 6mm Pass the instrument cabinet through the cut out in the donor panel and slide the panel clamp over the instrument from the back Turn the Red panel clamp screws until the instrument is clamped in position The screws must be tightened sufficient...

Страница 9: ...ons Analogue Output Cable Make the appropriate connections ensuring that the correct polarity and the maximum load specification is strictly observed DS1200 Connections BLUE wire from the PDT Cable connected to pin 45 on the rear of DS1200 RED wire from the PDT Cable connected to pin 46 on the rear of DS1200 Polarity is universal and can be wired or ...

Страница 10: ...1200 Pin 3 to Pin 46 on DS1200 Installing the Model PDT in a Air Gas Sampling System Warning Do not exceed a pressure of 50 bar Observe the operating ranges of the sensor The probes are damaged if they are overheated Observe maximum storage and transport temperature as well as maximum operating temperature i e protect the instrument from direct sunlight Important Before installation bleed compress...

Страница 11: ...tend the system response time to an unacceptable level In general a flow rate of between 2 and 3 litres minimum at NTP will give the right balance The sensor is a variable capacitor which is directly affected by changes in partial pressure of water vapour These changes are proportional to the dew frost point temperature The measuring transmitter can be installed directly into the process line or duc...

Страница 12: ...m If the sample is to be measured at full line pressure and the exhaust vented to atmosphere then valve 4B should be fitted and 4A omitted from the system If measurements are to be taken at full line pressure and the sample is to be returned to a part of the main line or a vent which is at a pressure higher than atmospheric and the input to that line needs a controlled pressure then both 4A and 4B ...

Страница 13: ... secure the cable connector in position on the transmitter Use the locking screw in order to affect a weatherproof seal Open the inlet valve slowly again and by opening all valves after the transmitter holder allow a low pressure purge through the whole sample system Note If a closed by pass loop is installed this section of the procedure is not possible Set the required pressures and flows within t...

Страница 14: ...r Model SH PDT Flow Through Sample Cell 3 0 125 34ø 1 34 dia 54 2 125 15 0 6 58 2 28 68 2 68 10 0 4 43 1 7 43 1 7 44 1 73 54 2 125 2 Mounting Holes 5 5ø 0 22 dia 43 1 7 Note The Assembly is shown with 1 4 OD tube fittings The dimensions across the tube fittings will vary for all other size fittings ...

Страница 15: ...ded wire Wire size others max 1 x 2 5mm2 stranded wire Relative Humidity 95 RH Dimensions HxWxD 48 x 96 x 120mm Cut out dimensions 44 5 x 91 5mm Ingress Protection Front panel IP65 NEMA4 Weight 230g Input o From Model PDT o Error detection Cable loop break Display o Display Readout PDT range o Scrolled error display Current Output o Programmable signal ranges 0 20 or 4 20mADC Factory set o Load ma...

Страница 16: ...ng Pressure From 1kPa 0 01 barA to Maximum 5 000kPa 50 barA Sample Flow Rate Independent but ideally 2 to 3 litres per minute Max 25 litres min Connection M12 5 pole EMC DIN EN 61326 Transmitter Enclosure Zinc alloy PC ABS Sensor Protection 316 Sintered stainless steel filter 50 micron Weatherproof Classification IP65 NEMA4 when Connector mated to Transmitter Mechanical Connection G 1 2 Mechanical W...

Страница 17: ...stems Alpha House 96 City Road Bradford West Yorkshire BD8 8ES United Kingdom Tel 44 0 1274 733100 Fax 44 0 1274 733200 Email info amsystems co uk Web www amsystems co uk Office Opening Hours Monday Thursday 8 30am 5 30pm GMT Friday 8 30am 5 00pm Saturday and Sunday Closed Distributor Information ...

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