SUTO S220 (01) PDF Document

There are two primary warnings for the SUTO S220:

WARNING! Compressed air!

Any contact with quickly escaping air or bursting parts of the compressed air system can lead to serious injuries or even death!

• Do not exceed the maximum permitted pressure range (see sensor’s label).

• Only use pressure tight installation material.

• Avoid that persons get hit by escaping air or bursting parts of the instrument.

• The system must be pressure-less during maintenance work.

WARNING! Voltage used for supply!

Any contact with energized parts of the product may lead to an electrical shock which can lead to serious injuries or even death!

• Consider all regulations for electrical installations.

• The system must be disconnected from any power supply during maintenance work.

• Any electrical work on the system is only allowed by authorized qualified personal.

ATTENTION! Permitted operating parameters!

Observe the permitted operating parameters. Any operation exceeding these parameters can lead to malfunctions and may lead to damage on the instrument or the system.

• Do not exceed the permitted operating parameters.

• Make sure the product is operated in its permitted limitations.

• Do not exceed or undercut the permitted storage and operation temperature and pressure.

Additionally, the product must be installed properly and frequently maintained, otherwise it may lead to wrong measurement values, which can lead to wrong results.

• Make sure that the transportation temperature of the instrument is between -30 … +70°C.

• For transportation it is recommended to use the packaging which comes with the instrument.

• Please make sure that the storage temperature of the instrument is between -20 … +50°C.

• Avoid direct UV and solar radiation during storage.

• For the storage the humidity must be <95% rH, no condensation.

The SUTO S220 is part of a series with the following features:

• Three Dew Point Transmitter models for different measuring ranges: S220 measures down to -100°C Td.

• Optional display for on-site values. The display can be rotated 340° horizontally to ease your access to readings.

• Various signal output options: 4 … 20 mA 2-wire, 4 … 20 mA 3-wire, or 4 … 20 mA 3-wire + Modbus/RTU.

• Optional integrated pressure sensor.

• IP65 casing provides robust protection in rough industrial environment.

• Very fast response time ensures safe and reliable indication whenever dew points are out of valid ranges.

• High accuracy of ± 2°C Td dew point.

The general technical data for the SUTO S220 are as follows:

* For CO2, the measurement range of S211 is limited to -40°C Td

** The rotation force cannot exceed 3.0 N.m

Electrical Data

Output Signals

• The device is for indoor use only! At an outdoor installation, it must be protected from solar radiation and rain.

• It is strongly recommended not to install the SUTO S220 permanently in a wet environment, which usually exists right after a compressor outlet.

• The flowing air or gas must pass the sensor tip for a proper measurement. This can be realized with a measurement chamber. For an installation without the measuring chamber, you must insert the device to the required depth.

• Sensor orientation requirement: Install the device only in the recommended area as shown in diagrams in the manual. The angle between the device and the centre vertical line of the tube must be greater than 30°. An upside down installation is not permitted.

1. Mount the transmitter on the measuring chamber by using the G1/2″ connection.

2. Make sure the transmitter is tightly sealed, therefore the sealing ring on the transmitter must be used.

3. Connect the measuring chamber to the compressed air system using a quick connector. Make sure the SUTO S220 is screwed on the chamber before connecting. The measuring chamber will create a purge flow.

This method is used when the full air flow is passing through the measuring chamber.

1. Connect the inlet of the chamber using a 6 mm teflon hose to your system. Note: The full flow must pass the measuring chamber. Ensure a certain flow rate to get fast response time.

2. Connect the outlet of the chamber to your system using the 6 mm hose quick connector.

To use the measurement chamber in a by-pass, you must ensure a pressure difference between the inlet (P1) and outlet (P2).

1. Connect the inlet of the chamber to your pipe system.

2. Connect the outlet of the chamber to your pipe system where the pressure is known to be lower than the inlet pressure (P1 > P2).

Note: The pressure difference P1 > P2 is needed to create a by-pass flow through the chamber. If there is no pressure difference, there will be no flow, and the response time will be very slow or the device will not respond at all to dew point changes.

This method is for a full flow installation where the sensor is in the pipe.

Method 1: Install through a nozzle

• Install the device only if the system is pressure-less.

• Check the size of the nozzle and make sure that no less than 1/3 of the sensor tip is inside of the pipe.

• The inner thread of the nozzle must be G 1/2″.

• The sensor must be inserted to a depth where the distance from the sealing surface to the end of the sensor is <= 34.0 mm, and the distance from the end of the nozzle to the end of the sensor is >= 10.5 mm.

Method 2: Install with NPT thread adapter

• Install the device only if the system is pressure-less.

• Please check the size of the nozzle and make sure not less than 1/3 of the sensor tip is inside of the pipe.

• The thread adapter (C190 0534) is used to adapt from G 1/2″ sensor side to NPT 1/2″ process connection.

Unscrew the device off the measurement chamber or from the nozzle. Please make sure that the system is pressure-less before the SUTO S220 is removed.

The pin assignments depend on the version of the SUTO S220 transmitter.

For S699 1220 (2-wire analog output and SDI):

For S699 2220 (3-wire analog output and SDI):

For S699 3220 / S699 4220 (3-wire analog output and Modbus/RTU):

Legend:

• SDI: Digital signal (internal use)

• -VB: Negative supply voltage

• +VB: Positive supply voltage

• +Ia: Active 4 … 20 mA signal

• NA: Not applicable

• D+: Modbus/RTU data +

• D-: Modbus/RTU data –

ATTENTION! Do not screw the M12 plug using force. Otherwise, it may damage the connecting pins.

Display Information: The optional display shows the live values of Dew point, Temperature, Humidity and Pressure (if the transmitter has a pressure sensor).

Displayed Values: The display automatically cycles through all values every 3 seconds.

Display Rotation: The display can be rotated by 340° to fit your application. To do this, please loosen the two hex-screws at both sides of the dew point transmitter. Do not fully unscrew them, only loosen them. Now you can turn the display by 340°. When the desired position is achieved, tighten the two hex-screws from both sides to fix the display position.

The default settings are as follows:

The device returns response messages with Function code: 03.

“Unit+Resolution+Data type” Channel (e.g., address 2200)

This is a 2-byte value that describes the corresponding measurement channel (e.g., 2301 for Dew point).

• First byte is unit: Defines the unit of measurement.

• Second byte contains Data Type and Resolution:

Data type (Bit7-Bit4):

0: float

1: 4-byte unsigned integer

2: double

Resolution (Bit3-Bit0):

0: 0

1: 0.0

2: 0.00

3: 0.000

4: 0.0000

“Status” Channel (address 2300)

This channel indicates settings changes and the status of measurement channels.

• Bit 15: 0 = Sensor settings have never been changed since last reading. 1 = Sensor settings have been changed since last reading.

• Bit 0: 0 = The 1st measuring channel (addressed 2301) is working properly. 1 = Not working properly.

• Bit 1: 0 = The 2nd measuring channel (addressed 2303) is working properly. 1 = Not working properly.

• Bit 2: 0 = The 3rd measuring channel (addressed 2305) is working properly. 1 = Not working properly.

• Bit 3: 0 = The 4th measuring channel (addressed 2307) is working properly. 1 = Not working properly.

• Bits 4…14: Not used.

To ensure stable communication, follow these Modbus/RTU network specifications:

Cable Length:

• The maximum total bus length must not exceed 1200 m.

• The stub length to each node (device) must not exceed 30 cm.

Wiring and Cable Type:

• A twisted-pair bus cable must be used.

• Bus-cable specifications must follow the EIA485 Standard, be twisted pair, and shielded (e.g., 2 x 2 x 0.22 mm², Li-2YCY).

• The shield must be connected at one end to the master GND connection.

• At the end of the bus, a 120 Ohm termination resistor must be placed.

Topology:

• The recommended bus topology is a daisy-chain.

• Avoid connecting Slaves to the master in a ring or star topology.

Please observe from time to time the sinter cap. If it appears to be dirty, it is recommended to replace it. Contaminated filters can lead to longer response time and to wrong measurements.

The instrument is calibrated ex work. The accuracy of the instrument is regulated by the on-site conditions, and parameters such as oil, high humidity, and other impurities can affect the calibration and furthermore the accuracy. Therefore it is recommended you calibrate the instrument at least once per year.

Electronic devices are recyclable material and do not belong in the household waste. The device, the accessories and its packings must be disposed of according to your local statutory requirements.