FREE ENGLISH SUTO S211 (01) PDF USER GUIDE
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FREE ENGLISH SUTO S211 (01) PDF OWNER MANUAL
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FREE ENGLISH SUTO S211 (01) PDF REFERENCE MANUAL
FREE ENGLISH SUTO S211 (01) PDF INSTRUCTION MANUAL
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What are the safety warnings I should be aware of when using this Dew Point Transmitter?
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 sensors 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 personnel.
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.
ATTENTION! Measurement values can be affected by malfunction!
The product must be installed properly and frequently maintained, otherwise it may lead to wrong measurement values, which can lead to wrong results.
General safety instructions
• It is not allowed to use the product in explosive areas.
• Please observe the national regulations before/during installation and operation.
Remarks
• It is not allowed to disassemble the product.
• Always use a spanner to mount the product properly.
What are the storage and transportation requirements for the instrument?
• 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.
What is the application and what are the main features of the S211/S215/S220 Dew Point Transmitters?
The S211 / S215 / S220 are industrial Dew Point Transmitters designed for measuring dew point and related parameters in compressed air or industrial gases under specified operating conditions. They are mainly used in compressed air systems in the industrial environment, and not developed to be used in explosive areas.
The default units for measured parameters are:
| Parameter | Default unit |
|---|---|
| Temperature | °C |
| Humidity | % rH |
| Dew point | °C Td |
| Pressure (optional) | bar(g) |
Remark: You can change the units using the Wireless DP Transmitter Adapter (optional) and the S4C-DP App.
Features
• Three Dew Point Transmitter models applicable for different measuring ranges:
– S211 measures down to -60°C Td
– S215 measures down to -20°C Td
– 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.
What are the general technical specifications for the S211/S215/S220?
| Parameters | Standard unit dew point: °C Td Standard unit temperature: °C other units: °F, K Standard unit humidity: % rH Standard unit pressure: bar (g) |
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| Principle of measurement | Capacitive method and frequency method | ||||||||
| Measuring range |
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| Sensor | S215 / S211: Polymer S220: QCM + Polymer Temperature sensor: Pt100 Pressure sensor: Piezo resistive type |
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| Measuring medium | Air, Argon, O2, N2, CO2* | ||||||||
| Response time (T90) @4 l/min |
S215 S211 S220 |
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| Ambient temperature | 0 … +50°C | ||||||||
| Ambient humidity | 0 … 95% rH | ||||||||
| Operating pressure | -0.1 … 1.6 MPa -0.1 … 35.0 MPa optional for S215 / S211 |
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| Casing material | Casing: Aluminium alloy Process thread: Stainless steel 1.4301 (SUS 304) Display cover: PC + ABS |
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| Protection class | IP65 | ||||||||
| Display (optional) | 0.66″ OLED display for displaying the measured value and unit 340° horizontally rotatable** |
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| Screwing thread | G ½” thread (ISO 228/1) | ||||||||
| Weight | 180 g |
* For CO2, the measurement range of S211 is limited to -40°C Td
** The rotation force cannot exceed 3.0 N.m
What are the electrical specifications and output signal details?
5.2 Electrical Data
| Power supply | 15 … 30 VDC |
| Current consumption | 2-wire: 4 … 20 mA 3-wire: 40 mA @ 24 VDC 3-wire with display: 50 mA @ 24 VDC |
5.3 Output Signals
| Analog output | 4 … 20 mA 3-wire or 4 … 20 mA 2-wire | ||||||||
| Analog output scaling |
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| Modbus output | Modbus/RTU | ||||||||
| Modbus communication | Mode: RTU Baud rate: 19200 Device address: last 2 digits of serial number Framing / parity / stop bit: 8 / N / 1 Response time: 1 second Response delay: 0 ms Interframe spacing: 7 char |
What is the accuracy of the S211/S215/S220?
| Accuracy |
Dew point: Temperature: ± 0.3°C Pressure: 0.5% FS |
| Repeatability of dew point | ±0.5 °C |
| Stated accuracy at | Ambient/process temperature 23 °C ± 3 °C Ambient/process humidity <95% rH, no condensation Airflow > 2 l/min at sensor tip |
| Flow rate | In order to reach a fast response time please ensure a flow rate of 2… 5 l/min at the sensor tip. Note: If the Measuring chamber A699 3491 is used, this flow rate will be maintained by the chamber at a pressure > 0.3 MPa. |
How does the transmitter measure Dew Point, Pressure Dew Point, and Humidity?
Dew Point Temperature
The dew point in compressed air systems is the temperature at which the moisture in the compressed air becomes saturated, causing condensation. It is a critical parameter in ensuring the quality and efficiency of compressed air. The correct term for negative dew point temperatures is frost point, although it is often simply referred to as dew point.
Pressure Dew Point
The Dew Point Transmitter always displays the pressure dew point, which is the dew point temperature specific to the pressure at which it is installed in the compressed air system.
• Pressure specific measurement: The Dew Point Transmitter measures the dew point at the exact pressure of the compressed air, ensuring that the readings accurately reflect the conditions in the system in which it is installed.
Humidity
The Dew Point Transmitter not only displays the pressure dew point, but also the relative humidity at the given pressure of the compressed air system.
• Relative humidity measurement: The Dew Point Transmitter displays relative humidity, which is the amount of moisture in the air compared to the maximum amount of moisture the air can hold at that specific temperature and pressure.
Atmospheric Dew Point in a Pressurized System
When integrated with a pressure sensor, the Dew Point Transmitter can directly measure the atmospheric dew point in pressurized systems. An atmospheric measurement chamber is not required.
• No special measurement chamber required: The Dew Point Transmitter integrated with a pressure sensor can output the atmospheric dew point directly, eliminating the need for a special atmospheric measuring chamber.
• Automatic calculation of the atmospheric dew point: The integrated pressure sensor measures the system pressure, enabling the Dew Point Transmitter to automatically calculate and display the atmospheric dew point based on real-time pressure conditions.
What is included in the package and what are the different product versions?
Before installing the device, make sure that all components listed below are included in your package.
| Qty | Description | Item no. (Model dependent) |
|---|---|---|
| 1 | Dew Point Transmitter | S215 / S211 / S220 (and various S699 models) |
| 1 | Depending on orders: M12 plug or M12 cable | Plug: C219 0059 Cable: A553 0104/A553 0105 |
| 1 | Instruction manual | No P/N |
| 1 | Calibration certificate | No P/N |
Dew Point Transmitter versions
| S699 1xxx | Dew Point Transmitter with 2-wire analog & SDI output |
| S699 2xxx | Dew Point Transmitter with 3-wire analog & SDI output |
| S699 3xxx | Dew Point Transmitter with 3-wire analog & Modbus/RTU output |
| S699 4xxx | Dew Point Transmitter incl. integrated pressure sensor with 3-wire analog & Modbus/RTU output |
Options
| A1381 | High pressure option 0… 35.0 MPa (only available for S215 & S211, not available for S699 4xxx versions) |
| A1387 | OLED Display option for 3-wire Analog version (only for S699 2xxx) |
| A1388 | OLED Display option for 3-wire Analog & Modbus version (only for S699 3xxx & S699 4xxx) |
What are the requirements for installing the dew point transmitter?
• 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 S211 / S215 / 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. 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.
ATTENTION! Wrong measurement is possible if the instrument is not installed correctly.
How do I install the transmitter with Measuring Chamber A699 3491?
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 Dew Point Transmitter is screwed on the chamber before connecting. The measuring chamber will create a purge flow.
How do I install the transmitter with By-pass Measuring Chamber A699 3493?
For the model A699 3493, there are two installation methods:
Method 1: Full pass through by-pass installation
This method is to be 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.
Method 2: By-pass installation
Note: In order to use the measurement chamber in a by-pass you must ensure a pressure difference between P1 and 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.
Note: The pressure difference P1 > P2 is needed to create a by-pass flow through the chamber. If there is no pressure difference between P1 and P2, there will be no flow through the chamber and therefore the response time will be very slow or the device will not even respond at all to the dew point changes.
How do I install the transmitter without a measuring chamber?
This is the 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. (>= 10.5 mm inside pipe).
• The inner thread of the nozzle must be G 1/2″.
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. (>= 10.5 mm inside pipe).
• The thread adapter (C190 0534) is used to adapt from G 1/2″ sensor side to NPT 1/2″ process connection.
How do I remove the Dew Point Transmitter?
Unscrew the device off the measurement chamber or from the nozzle. Please make sure that the system is pressure-less before the Dew Point Transmitter is removed.
What are the M12 plug pin assignments for the different transmitter versions?
ATTENTION! Do not screw the M12 plug using force. Otherwise, it may damage the connecting pins.
Dew Point Transmitter versions: S699 1215 / S699 1211 / S699 1220
Output signal: 2-wire analog output and SDI
| Pin 1 | Pin 2 | Pin 3 | Pin 4 | Pin 5 |
|---|---|---|---|---|
| SDI | -V B (Analog loop) | +V B (Analog loop) | N/A | N/A |
| Brown | White | Blue | Black | Gray |
Dew Point Transmitter versions: S699 2215 / S699 2211 / S699 2220
Output signal: 3-wire analog output and SDI
| Pin 1 | Pin 2 | Pin 3 | Pin 4 | Pin 5 |
|---|---|---|---|---|
| SDI | -V B | +V B | +Ia 4 … 20 mA | NA |
| Brown | White | Blue | Black | Gray |
Dew Point Transmitter versions: S699 3215 / S699 3211 / S699 3220 / S699 4215 / S699 4211/ S699 4220
Output signal: 3-wire analog output and Modbus/RTU
| Pin 1 | Pin 2 | Pin 3 | Pin 4 | Pin 5 |
|---|---|---|---|---|
| +Ia 4 … 20 mA | -V B | +V B | D+ Modbus/RTU | D- Modbus/RTU |
| Brown | White | Blue | Black | Gray |
Legend to pin assignment
| SDI | Digital signal (internal use) | +la | Active 4 … 20 mA signal |
| -VB | Negative supply voltage | NA | Not applicable |
| +VB | Positive supply voltage | D+ | Modbus/RTU data + |
| D- | Modbus/RTU data – |
How do I connect the transmitter outputs to customer equipment?
This section provides figures to show how outputs supported by the S211/S215/S220 connect with the customer equipment.
2-wire analog output: Connect +VB from the transmitter to the positive terminal of the DC supply. Connect the negative terminal of the DC supply to the positive terminal of the Current meter. Connect the negative terminal of the Current meter to -VB on the transmitter.
3-wire analog output: Connect +VB from the transmitter to the positive terminal of the DC supply. Connect -VB from the transmitter to the negative terminal of the DC supply. Connect +Ia from the transmitter to the positive terminal of the Current meter. Connect the negative terminal of the Current meter back to the negative terminal of the DC supply (common ground).
3-wire analog and Modbus/RTU outputs: The analog part is connected as a 3-wire analog output. For Modbus, connect D+ from the transmitter to the D+ of the Modbus/RTU master and D- from the transmitter to the D- of the master.
Modbus/RTU output: Connect +VB from the transmitter to the positive terminal of the DC supply and -VB to the negative terminal. Connect D+ from the transmitter to the D+ of the Modbus/RTU master and D- from the transmitter to the D- of the master.
How does the optional display work?
Display Information
The dew point transmitter series S211, S215 and S220 can be equipped with an optional display directly mounted on the sensor. The display shows the live values of Dew point, Temperature, Humidity and Pressure (if the dew point transmitter with a pressure sensor).
Compatibility
Two versions of the display are available.
• Display option with part number A1387 – which is compatible with dew point transmitters having 3-wire and SDI output (S699 2xxx).
• Display option with part number A1388 – which is compatible with dew point transmitters having 3-wire and Modbus/RTU output (S699 3xxx and S699 4xxx).
For dew point transmitters having a 2-wire and SDI output (S699 1xxx) there is no display option available, because of the limited current being available.
Note: Displays can not be exchanged between dew point transmitters having 3-wire and SDI output (S699 2xxx) and dew point transmitters having 3-wire and Modbus/RTU output (S699 3xxx and S699 4xxx), they are not compatible to be swapped.
Displayed Values
The display automatically cycles through all values every 3 seconds. This means the display is showing every 3 seconds the live values of Dew point, Temperature, Humidity and Pressure (if the dew point transmitter with pressure sensor) and is cycling through these automatically.
Display Rotation
The display can be easily 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 full 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.
What is the standard scaling for the analog output?
Depending on the model, the Dew Point Transmitter provides a 2-wire or 3-wire analog output. The analog output ranges 4 … 20 mA.
• The 2-wire analog output is a current loop (loop-powered sensor).
• The 3-wire analog output is an active current output.
The following table shows the standard scaling of the analog output.
| Type | Scaling |
|---|---|
| S211 | 4 mA = -60°C Td 20 mA = +20°C Td |
| S215 | 4 mA = -20°C Td 20 mA = +50°C Td |
| S220 | 4 mA = -100°C Td 20 mA = +20°C Td |
For other ranges, please contact the manufacturer. The analog output can be allocated to the temperature, dew point, and humidity.
What are the default settings and data structure for the Modbus/RTU Interface?
The default settings of the Modbus interface are as follows.
| Mode | RTU |
| Baud rate | 19200 |
| Device address | Last two digits of serial number |
| Framing / parity / stop bit | 8 / N / 1 |
| Response time | 1 second |
| Response delay | 0 ms |
| Inter-frame spacing | 7 char |
Response message that the device returns to the master: Function code: 03
Byte order for 2-byte and 4-byte data
| Byte Order | 1st | 2nd | 3rd | 4th | Data Type |
|---|---|---|---|---|---|
| 1-0-3-2 | Byte 1 (MMMMMMMM*) | Byte 0 (MMMMMMMM *) | Byte 3 (SEEEEEEE) | Byte 2 (EMMMMMMM *) | FLOAT |
| 1-0-3-2 | Byte 1 | Byte 0 LSB | Byte 3 MSB | Byte 2 | UINT32 INT32 |
| 1-0 | Byte 1 MSB | Byte 0 LSB | — | — | UINT16 INT16 |
| 1-0 | Byte 1 XXX * | Byte 0 DATA | — | — | UINT8 INT8 |
* S: Sign, E: Exponent, M: Mantissa, XXX: no value
Explanations of MSB and LSB
MSB: MSB refers to Most Significant Byte first, which follows the Big-Endian byte order. For example, if the main system follows the MSB first order: When the 4-byte floating number, in the order of Byte1-Byte0-Byte3-Byte2, is received from the slave (sensor), the master must change the byte order to Byte3-Byte2-Byte1-Byte0 for the correct display of the value.
LSB: LSB refers to Least Significant Byte first, which follows the Little-Endian byte order. For example, if the main system follows the LSB first order: When the 4-byte floating number, in the order of Byte1-Byte0-Byte3-Byte2, is received from the slave (sensor), the master must change the byte order to Byte0-Byte1-Byte2-Byte3 for the correct display of the value.
What is the Holding Register Table for Modbus/RTU?
| Modbus Register Address | Channel description | Read/Write | Data Type | Data Length |
|---|---|---|---|---|
| 2000 | Group ID | R | INT16U | 2-Byte |
| 2001 | Device ID | R | INT16U | 2-Byte |
| 2002 | Serial number | R | INT32U | 4-Byte |
| 2004 | FW/HW | R | INT16U | 2-Byte |
| 2005 | Calibration date | R | DOUBLE | 8-Byte |
| 2009 | Valid days from calibration date | R | INT16U | 2-Byte |
| 2010 | Measuring Channel number | R | INT16U | 2-Byte |
| 2011 | Device name | R | string | 16-Byte |
| 2100 | Alternative humidity unit | R/W | INT16U | 2-Byte |
| 2101 | Static pressure (in bar(g)) | R/W | FLOAT | 4-Byte |
| 2103 | Atmospheric pressure (in hPa) | R/W | FLOAT | 4-Byte |
| 2200 | Unit+Resolution+Data type of Dew point | R | INT16U | 2-Byte |
| 2201 | Unit+Resolution+Data type of Alternative humidity | R | INT16U | 2-Byte |
| 2202 | Unit+Resolution+Data type of Pressure | R | INT16U | 2-Byte |
| 2203 | Unit+Resolution+Data type of Temperature | R | INT16U | 2-Byte |
| 2300 | Status | R | INT16U | 2-Byte |
| 2301 | Channel Value of Dew point | R | FLOAT | 4-Byte |
| 2303 | Channel Value of Alternative humidity | R | FLOAT | 4-Byte |
| 2305 | Channel Value of Pressure | R | FLOAT | 4-Byte |
| 2307 | Channel Value of Temperature | R | FLOAT | 4-Byte |
How are the “Unit+Resolution+Data type” and “Status” Modbus channels interpreted?
“Unit+Resolution+Data type” Channel
• First byte is unit:
| 1 °C | 8 g/kg | 36 MPa(g) |
| 2 °F | 9 g/m³ | 38 bar(g) |
| 3 % rH | 30 ppm[v] | 39 psi(g) |
| 4 °C Td | 31 °C Td atm. | 54 g/m³ atm. |
| 5 °F Td | 32 °F Td atm. | 55 mg/m³ atm. |
| 7 mg/m³ | 35 kPa(g) |
• Second byte:
| Data type: | Resolution: |
|---|---|
| 0 float | 0 0 |
| 1 4-byte unsigned integer | 1 0.0 |
| 2 double | 2 0.00 |
| 3 0.000 | |
| 4 0.0000 |
“Status” channel
The highest bit is used for indicating if any setting is changed by users. The rest bits are used for indicating if the measuring channels that follows the Status channel are working properly or not.
| Bit | Description |
|---|---|
| 15 | 0: Sensor settings have never been changed since last reading from the master. 1: Sensor settings have been changed since last reading from the master |
| 0 | 0: The 1st measuring channel that follows the Status channel (addressed 2301) is working properly. 1: This measuring channel is not working properly. |
| 1 | 0: The 2nd measuring channel that follows the Status channel (addressed 2303) is working properly. 1: This measuring channel is not working properly. |
| 2 | 0: The 3rd measuring channel that follows the Status channel (addressed 2305) is working properly. 1: This measuring channel is not working properly. |
| 3 | 0: The 4th measuring channel that follows the Status channel (addressed 2307) is working properly. 1: This measuring channel is not working properly. |
| 4 … 14 | Not used |
How do I connect Modbus/RTU devices to a master?
Sensors and devices with a Modbus/RTU output can be connected to a Modbus master device. See below specifications of the Modbus/RTU connections.
Modbus/RTU Cable Length
A Modbus/RTU bus line has limitations which shall not be exceeded, otherwise the communication might not be stable.
• The maximum total bus length must not exceed 1200 m.
• The stub length to each node must not exceed 30 cm.
Modbus/RTU Wiring and Cable Type
To ensure a stable communication a twisted-pair bus cable must be chosen to set up the Modbus/RTU communication.
• Bus-cable specifications must follow the EIA485 Standard, must be twisted pair and shielded, for example 2 x 2 x 0.22 mm², Li-2YCY (A553 0123).
• The shield must be connected at one end to the master GND connection.
• At the end of the bus, a 120 Ohm resistor should be placed a termination resistor.
Daisy-Chain using RS-485 Splitter
SUTO devices with M12 connectors can be easily connected in a Modbus/RTU daisy-chain using a M12 RS-485 splitter (A554 3310). Furthermore this allows to easily place the M12 termination resistor (C219 0055) at the last splitter in the bus-chain. Connect Modbus/RTU slaves with M12 connectors to a daisy-chain using M12 RS-485 splitters. The M12 RS-485 splitter (A554 3310) comes with two M12 connectors to easily wire the chain.
Topology of Modbus/RTU Daisy-Chain
The recommended bus topology is to connect devices as a daisy-chain. Other connection topologies are not recommended and should be avoided. Avoid a connection of Slaves to the master in ring or star topology.
What optional accessories are available?
Measuring Chambers
There are different types of measuring chambers for example Measuring chamber with quick connector, by-pass chamber with in and out connection, measuring chamber for dryer installation, or high pressure chamber.
Wireless DP Transmitter Adapter
The Wireless DP Transmitter Adapter provides a wireless interface between the mobile phone App S4C-DP and the S211/S215/S220. With this DP Adapter, you can manage the S211/S215/S220 settings through the free mobile phone App S4C-DP. For details, see Wireless DP Transmitter Adapter instruction manual.
What are the recommendations for calibration and maintenance?
Calibration
The instrument is calibrated ex work. The exact calibration date is printed on the certificate that is supplied together with the instrument. 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.
Maintenance
Please observe from time to time the sinter cap. If it appears to be dirty, it is recommended to replace it for this please contact the manufacturer.
ATTENTION! Contaminated filters can lead to longer response time and to wrong measurements.
How should the device be disposed of?
Electronic devices are recyclable material and do not belong in the household waste. The device, the accessories and its packings must be disposed according to your local statutory requirements. The disposal can also be carried by the manufacturer of the product, for this please contact the manufacturer.
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