EKO MS-80 Instruction Manual
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EKO MS-80 Instruction Manual

Pyranometer, sub-category fast response and spectrally flat
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MS-80
INSTRUCTION MANUAL
Pyranometer
ISO9060: 2018 Class A
Sub-category "Fast response" and "Spectrally flat"
MS-80S
MS-80U

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Summary of Contents for EKO MS-80

  • Page 1 MS-80 INSTRUCTION MANUAL Pyranometer ISO9060: 2018 Class A Sub-category “Fast response” and ”Spectrally flat” MS-80S MS-80U...
  • Page 2 M S-8 0 RT D Te mp er at ur e C onv ers ion Tab l e ( P t 1 0 0 C las s A) 72 A- 9 . M S-8 0 S S et t ing s re p ort EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 1...

  • Page 3: Important User Information

    For warranty terms and conditions, please contact EKO Instruments or your distributer for further details. EKO guarantees that the product delivered to customer has been tested to ensure the instrument meets its published specifications. The warranty included in the conditions of delivery is valid only if the product has been installed and used according to the instructions provided in this operating manual.

  • Page 4: Rohs Directive 2002/95/Ec

    EU. If you have purchased EKO Instruments branded electrical or electronic products in the EU and are intending to discard these products at the end of their useful life, please do not dispose of them with your other household or municipal waste.
  • Page 5 ISO/IEC17025, which are relevant to calibration and testing. EKO is a manufacturer who can offer calibration service for pyranometers and pyrheliometers in-house. Based on the applied calibration methods EKO provides the best quality solar sensor calibrations compliant to the international standards defined by ISO/IEC17025 / 9847 [Indoor method] and ISO9059 [Outdoor method] [Certification: L13-94- R2 / www.pjlabs.com]...

  • Page 6: Declaration Of Conformity

    Amendment to the above directive: 93/68/EEC Date: April 4, 2019 Position of Authorized Signatory: General Manager of R & D Department Name of Authorized Signatory: Shuji Yoshida Signature of Authorized Signatory: EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 5...
  • Page 7 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 6...

  • Page 8: Safety Information

    3. Safety Information EKO Products are designed and manufactured with consideration for safety; however, please make sure to read and understand this instruction manual thoroughly to be able to operate the instrument safely in the correct manner. WARNING Attention to user; pay attention to the instructions given on the CAUTION instruction manual with this sign.
  • Page 9 Holding only the sunscreen part may lead to dropping the sensor as it comes off from the sunscreen.  For voltmeters, data loggers, etc. to be measured by connecting to MS-80, MS-80U, use a product with an input resistance of 100MΩ or more. 3. Signal Cable [MS-80S] ...
  • Page 10 100Ω). Combined with on-board sensors for remote diagnostics of the sensor temperature, relative humidity and tilt position. For the MS-80 series a range of accessories is available (MV-01 ventilator and heater, cable extensions and albedo mounting plates). MS-80 unique properties:...
  • Page 11 UV radiation known as harmful radiation to materials can change the chemical properties of substances irreversibly. In the case of the MS-80, the detector is totally isolated below the sensor optics surface, which is sealed, and can’t be affected by a high dose of UV, moisture or pressure differences.
  • Page 12 Compact and light weight  Fast Response time [<0.5s@95%, <1s@99%]  Excellent temperature response over a wide temperature range [-20 to +50℃]  Low offset characteristics EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 11...
  • Page 13 MS-80 is made for accurate irradiance measurements in the field of solar energy and meteorological research. The MS-80 analog sensor is well suited to be used in traditional meteorological networks where analog sensors are still common. MS-80S with the Smart interface with multiple outputs is made for the solar energy industry to be used in different applications.
  • Page 14 Nuts [ M5 ] x2 (1) In case of MS-80/80S, standard length is 10m for both signal/power cable. For different length of cables [e.g. to meet your application needs] please contact EKO or your local distributor. (2) MS-80U cable length is 3m, no other optional lengths are available. The cable is not detachable from the body.

  • Page 15: Getting Started

    B. Glass Dome C. Detector D. Body Levelling Screw Cable G. Spirit Level *The cable can’t be removed from the pyranometer Figure 5-2. Pyranometer Parts Name [MS-80U] EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 14...
  • Page 16 A glass dome creates a sealed environment for the detector and protects it against dirt and rain. The dome of the EKO pyranometers is only transparent for radiation emitted by the sun. The combination of the glass dome and the Quartz diffuser give a 180 degrees field of view and cosine response.
  • Page 17 The sunscreen can be removed by loosening the knurling screw and sliding it towards the spirit level direction. *When carrying MS-80 or MS-80S with a sunscreen attached, always hold the instrument from the bottom. Holding only the sunscreen may lead to dropping the sensor as it comes off from the sunscreen.
  • Page 18 Installing at an inclined angle After the MS-80, MS-80S or MS-80U is adjusted to horizontal position in levelled surface, install it on tilted a tilted mount. When installing the pyranometer, do not remove the levelling feet or fixed feet. If the levelling feet are removed, it may induce offsets to output values due to the thermal effects from the mounting plate.

  • Page 19: Ground Connection

    2. Wiring procedure Connect the output cable to the MS-80 and MS-80S by inserting the cable connector to the connector on the body then turn the screw cap. Make sure to check the pin layout of the connector before connecting the cable.
  • Page 20 5- 4. Co n n ec t io n s The MS-80 and MS-80U have an analog output for irradiance and detector temperature measurements. The MS- 80S is based on a digital Smart processing interface providing advanced measurement functions with 4 different industrial signal outputs (Modbus 485 RTU, configurable SDI-12, 4-20mA, configurable 0-10mA and 0-1V with external precision shunt resistor 100Ω).

  • Page 21: Analog Output

    Be sure to connect the cable shield to the frame ground of the measurement device, otherwise noises may occur. MS-80 (from S/N: S19046151, temperature sensor 3W Pt100 class A). Connect the 5 wires with corresponding color to the input terminals of the voltmeter or data logger (figure 5-5).
  • Page 22 MS-80S has two current outputs (4-20mA and 0-10mA). The 4-20mA output is default, the 0-10mA output can be enabled through the “Hibi” software which can be downloaded from the EKO website (MS-80S product page). See appendix 3 to change the current output settings. The current output can be converted into a voltage output when a shunt resistor is used in series.
  • Page 23 Table 5-7. Shunt resistor value at supply voltage Supply voltage Shunt resistor value 8VDC to 15VDC 100Ω to 250Ω 15VDC to 24VDC 250Ω to 500Ω 24VDC to 30VDC 500Ω EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 22...
  • Page 24 SDI-12 output can be selected through the Hibi software. PC connection (Modbus) EKO can provide an optional and approved USB converter for connection with a PC. The converter cable is needed for setup , sensor diagnostics and data logging through the Hibi software.
  • Page 25 Communication errors may occur depending on the connection distance and the number of connections. In that case, please prepare and apply a RS485 booster or a repeater. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 24...
  • Page 26 DC-12V+ SDI-12 Data Master Ground Sensor Sensor Sensor No. n No.1 No.2 Figure 5-14. Communication Connection with SDI-12 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 25...
  • Page 27 4. Overview wire assignments Table 5-7. Wire Color Codes of MS-80 and MS-80U (Also see [7-3. Output Cables]) Cable Color MS-80 MS-80U MS-80 MS-80U Brown mV [+] mV [+] White White mV [-] mV [-] Blue Green Pt100 [B] Black...

  • Page 28: Data Logger Settings

    For MS-80 with analog output, the datalogger should have a voltage input range (0-20mV), resolution (~1µV ) and impedance (> 100MΩ). For the MS-80S with current output, Modbus 485 RTU and SDI-12, the datalogger should have one of those inputs.
  • Page 29 2. Pyranometer default settings The MS-80 and MS-80U have an analog output for irradiance and detector temperature measuremests. The MS- 80S is based on a digital Smart processing interface providing advanced measurement functions with 4 different industrial signal outputs (Modbus 485 RTU, configurable SDI-12, 4-20mA, configurable 0-10mA and 0-1V with external precision shunt resistor 100Ω).
  • Page 30 3. Irradiance conversion For MS-80, MS-80U with analog mV output the global solar Irradiance [W/m2] can be determined by measuring the output voltage [mV] divided by the individual sensor sensitivity [μV/W・m-2]. The maximum output voltage can be calculated by multiplying the maximum solar irradiance with the calibration factor [e.g.
  • Page 31 ] by the averaging interval period [s]. Then sum-up the total data number [n] of averaged data points in one day. Its physical unit is expressed with [J/m ] and can be calculated with J = W・S EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 30...

  • Page 32: Maintenance And Troubleshooting

    6- 1. Ma in t e na nc e By using the MS-80 pyranometers accurate results can be obtained if the glass dome and the condition of the instrument are maintained properly. Furthermore, regular maintenance and scheduled re-calibrations can extend the lifetime of the pyranometers.
  • Page 33 Weekly Check the tilt angle and roll angle via tilt angle measurements due to the cosine Modbus or SDI-12 output. response of the sensor. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 32...

  • Page 34: Calibration Method

    Measurement Uncertainty of Indoor Calibration The calibration uncertainty of MS-80 can be kept below (0.7%) as stated in the scope of accreditation and stated on each calibration certificate. Calibration in the lab is performed at a constant ambient temperature and ultra stable light conditions.

  • Page 35: Troubleshooting

    6- 3. Tro ub l es h o ot i ng Read the following in case of any sensor trouble. If any questions should remain, please contact EKO for further technical support. Table 6-3. Troubleshooting in field Failure Action Make sure that the sensor cable is connected properly to the instrument. To verify the MS-80 connection, measure the impedance of output cable [between the “+”...
  • Page 36 Select an appropriate The fluctuation of ground wire connection method for this product according to the type of data logger and measured current is measurement environment. large. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 35...

  • Page 37: Pyranometer Specifications

    7- 1. S pe c i fi c at i on s 1. Pyranometer Specifications The comparison table below, Table 7-1, shows typical values for the characteristic parameters of the EKO Pyranometers and the corresponding values of the ISO 9060: 2018 standard. The content of the characteristic item is partly changed from ISO 9060: 1990.
  • Page 38 100Ω precision shunt resistor Resolution < 0.01W･m Modbus: DC5V±5% or DC8V to DC30V±10% Input Power Supply 0-1V/4-20mA: DC8V to 30V±10% SDI-12: DC9.6V to 16V EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 37...
  • Page 39 The operational maximum irradiance is defined as the maximum irradiance exposure level. Beyond this point damage may occur to the sensor. When using MS-80, please refer to the product label and check whether it corresponds to NTC or P100. Temperature sensor is internally connected to Modbus electronics.
  • Page 40 A. Fixing Hole Pitch 65 mm B. Body Height 50 mm C. Levelling Screw Height 16 mm D. Width Φ78 mm Figure 7-2. Outer Dimensions [MS-80U] EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 39...
  • Page 41 USB Type-A Figure 7-4. EKO Converter cable [MS-80S] 3. MS-80U No. Line color 1. Red 2. White 3. Green 4. Black Shield Figure 7-5. Output Cables [MS-80U] EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 40...
  • Page 42 Heater Converts from RS485  USB for the communication with MS-80S EKO Converter Cable MS-80S and allows to connect to PC via USB terminal. Cable Length:1.8m EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 41...
  • Page 43 Pyrheliometer is classified into 4 classes of AA, A, B and C based on the performance of each characteristic, and specifications of "spectrally flat radiometer" and "Fast response radiometer" are set as sub-categories. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 42...
  • Page 44 Additional processing [ISO 9060: 2018 added] Error generated when converting the analog output of Pyranometer errors or Pyrheliometer into a digital signal with a signal converter etc. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 43...

  • Page 45: Software Installation

    * Connect the power supply GND and RS485GND Figure A3-1. Hardware preparation If you use the optional “EKO Converter cable”, you can install it simply by inserting the cable connector into the main unit. Power for the MS-80S can be supplied via USB. (See Figure A3-2).
  • Page 46 RS485 / USB conversion cable from the displayed COM port numbers. If you can't find a selectable COM port, click the Refresh button and click Select again to try again. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 45...
  • Page 47 When the connection is completed, the window automatically switches to the "Dashboard" window. In the upper-right corner of the display changes to "Pyranometer Connected". Figure A3-7. Dashboard EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 46...
  • Page 48 After that, click the “CONNECT” button in Connection status. Figure A3-9. Manual connection When the connection is completed, "Connected" is displayed. "Sensor Pyranometer Connected" is also shown in the upper-right corner of the display. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 47...
  • Page 49 ・ "Save" button: Save the settings. ・ “Read” button: Read out the settings. ・ “Output” button: Output the settings to CSV file Figure A3-12. Apply changes screen EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 48...
  • Page 50 S-series/ M-series/ SMP-series/ SRD-series SDI-12 address 0 to 9 / A to Z / a to z Connection status Connected / Disconnect Figure A3-14. Communication setting screen EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 49...
  • Page 51 ): Setting of minimum and maximum irradiance (W/m ) corresponding to the output. Resistance (ohm) Load resistor value for calculating output current at 0- 1V output EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 50...
  • Page 52 4. "TEMPERATURE" setting items Item Name Setting contents Setting range UNIT Preferred unit ℃-Celsius / ℉-Fahrenheit / K-Kelvin (temperature unit setting) Figure A3-17. Sensor settings screen EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 51...
  • Page 53 0°. The spirit vial can be used as a reference to readjust the tilt and roll position. The MS-80S X and Y position is factory calibrated. Figure A3-18. Sensor Position setting EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 52...
  • Page 54 Unit: selected from °C (Celsius)”, “°F (Fahrenheit)” or “K (Kelvin)”. (°C: default) <Humidity> Humidity measurement data (Unit: "%RH"), (30% is the threshold value) <Tilt Angle> Tilt (X axis angle) and Roll (Y axis angle) data EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 53...
  • Page 55 (Start time < End time) “LOG DATA buttons:” Click to start logging measurement data. When "STOP" is clicked while measurement data is being logged, logging stops. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 54...
  • Page 56 Contact (Contact) When you click the “Contact” button , the contact page on [EKO Instruments] website appears in the Browser. Figure A3-22. Contact page @EKO website Exiting the software (Hibi) To exit Hibi, click the "X" in the upper-right corner of the window EKO INSTRUMENTS CO., LTD.
  • Page 57 Read Coils 0x02 Read Discrete Inputs 0x03 Read Holding Registers 0x04 Read Input Register 0x05 Write Single Coil 0x06 Write Single Register 0x10 Write Multiple Registers EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 56...
  • Page 58 Table A4-4. Data format to use Format Abstract Unsigned 16bit Integer Signed 16bit Integer Unsigned 32bit Integer Signed 32bit Integer IEEE754 32bit floating point format ASCII characters string EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 57...
  • Page 59 ・ The contents of registers No. 0 to 49 are switched according to the register type setting (No.103). ・ Registers No. 0 to 99 are read-only. ・ Registers after No.100 can be read and written. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 58...
  • Page 60 Firm Ver: Firmware version number Hard Ver: Hardware version number T. Coeff: Temperature compensation factor, set by No.174-181 L. Coeff: Linearity compensation factor, set by No.182-189 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 59...
  • Page 61 Minimum solar radiation intensity 0 (fixed) 1600 Maximum solar radiation intensity 1600 (default) Measurement Mode (default) Sensitivity Sensitivity (LSW) (µV/W/m Sensitivity (MSW) Temperature unit, unit: °C (default) EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 60...
  • Page 62 Linearity correction factor 4-k4 (LSW) L.Coeff. k4 Linearity correction factor 4-k4 (MSW) Addr Node number Communication speed (LSW) Communication speed (MSW) Parity Parity bit 46 to 49 are Reserve EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 61...
  • Page 63 Fixed value Fixed value Fixed value 35 to 40 are Reserve 2020 Fixed value Fixed value Firm Ver Hard ver. Address 46 to 49 are Reserve EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 62...
  • Page 64 ・ Modbus communication status of register No.90-92 is updated for each communication. ・ The "EKO" character is written as the company name registration in register No. 96 and 97. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1...
  • Page 65 Sets the radiance in 0-1V or 1V. (0-1Vmode 1V) Irradiance Radiation intensity value at 4-20 mA mode and output current (4-20mode 4mA) of 4mA defaults to 0W/m EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 64...
  • Page 66 Linear correction factor k2 L.Coeff.k3 Linear correction factor k3 L.Coeff.k4 Linear correction factor k4 Cal.Date Calibration date in YYYYMMDD format Cal.Value Calibration value, uV/W/m 194 to 199 are Reserve EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 65...
  • Page 67 ・ Calculate the solar radiation meter output after linear correction using the following equation using the coefficient k1/k2/k3/k4 for the solar radiation meter output V(T) after temperature correction. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 66...
  • Page 68 ・ Do not write to any Coil other than Reboot/Save. ・ The readout is always zero. A4-15. Register details Table A4-18. Coil register Addr Parameter Type Reboot Save EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 67...
  • Page 69 14: SDI-12 version (represents version 1.4) EKOInst: Company name (8 characters) MS-80S: Sensor model name (6 characters) V32: Sensor version (3 characters) 20000001: Serial number (8 characters) EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 68...
  • Page 70 Read the calibration date of this device. YYYY: AD, MM: month, DD: day. <CR><LF> Variable Identify Measurement Commands and Identify Measurement Parameter METADATA depending on Commands are supported. request data EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 69...
  • Page 71 A b ou t r ec a lib ra ti o n When recalibrating at a recalibration center other than EKO, the calibration scale of the other center may differ slightly from the pyranometer calibration scale and sensitivity constants (μV/Wm ) obtained by EKO.
  • Page 72 11770 3758 43110 11290 3629 41070 10840 3504 39140 10410 3385 37310 10000 3270 35570 9605 3160 33930 9227 3054 32370 8867 2952 30890 8523 2854 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 71...
  • Page 73 108.2 119.8 96.9 108.6 120.2 97.3 109.0 120.6 97.7 109.3 120.9 98.0 109.7 121.3 98.4 110.1 121.7 98.8 110.5 122.1 99.2 110.9 122.5 99.6 111.3 122.9 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 72...
  • Page 74 [W/m2] 0 - 10 [mA] Modbus RTU Settings Enable/Disable Enable (Default) Address Baudrate 19200 Parity EVEN Reg. type S-series SDI-12 Settings Enable/Disable Disable Address Baudrate 1200 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1 Pg. 73...
  • Page 75 EKO Asia, Oceania 1-21-8 Hatagaya, Shibuya-ku, Tokyo 151-0072 Japan P. +81.3.3469.6711 F. +81.3.3469.6719 info@eko.co.jp https://eko-asia.com EKO North America 111 North Market Street, Suite 300, San Jose, CA 95113, USA P. +1-408-977-7751 F. +1-408-977-7741 info@eko-usa.com https://eko-usa.com EKO Europe, Middle East, Africa,...

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