EKO MS-40 Instruction Manual
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EKO MS-40 Instruction Manual

Pyranometer
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  • Page 2 A- 7. M S- 4 0 S S et t in g R ep or t A- 8. Sur g e pr ot ec t i o n EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 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: Weee Directive 2002/96/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 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 ISO9847 [Indoor method] and ISO9059 [Outdoor method] [Certification: L13-94-R2 / www.pjlabs.com]...
  • Page 6 Amendment to the above directive: 93/68/EEC Date: June 30, 2017 Position of Authorized Signatory: Deputy General Manager of Quality Assurance Dept. Name of Authorized Signatory: Shuji Yoshida Signature of Authorized Signatory: EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 5...
  • Page 7 Following the provisions of the directive: EMC-directive: 2014/30/EU Date: Apr. 15, 2021 Position of Authorized Signatory: Manager of Quality Assurance Div. Name of Authorized Signatory: Minoru Kita Signature of Authorized Signatory: EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 6...

  • Page 8: Safety Information

    ➢ When connecting this product to a measuring instrument for measurement, connect the shield wire of the output cable to signal ground (SG) for MS-40 and to ground earth for MS-40S. Noises may be included in the measurement data. ➢...
  • Page 9 ➢ When carrying any MS-40 model with the sun screen attached, always hold the instrument from the bottom. Holding only the sun screen part may lead to dropping the sensor as it comes off from the sun screen.
  • Page 10 For the pyranometers that meet the criteria of response time and spectral selectivity, "fast response" and "spectrally flat" respectively are accompanied as subcategories of grades. MS-40 is a ISO9060:2018 pyranometer that is classified as Class C and meets the subcategory "spectrally flat".
  • Page 11 In case of MS-40, MS-40S, with combination of optional MV-01 [ventilator + heater unit], reduces the dew condensation and accumulation of dusts and snow on glass dome by continuously blowing heated air. The ventilation unit with heater is recommended when the sensor is deployed with a chance of occurance of condensation, snow and ice.

  • Page 12: Fiel D Ap Pl Ic Ati Ons

    PV plants. Digital sensor can be easily configured, With the MS-40S, users can connect using a standard laptop and ‘Hibi’; a new, custom built programme developed by EKO to give users real-time access to the internal diagnostics, custom settings, and data on irradiance, humidity, internal temperature and tilt angle from the sensor.
  • Page 13 4- 3. Appli c ati on to th e s ta nd ar d s MS-40/MS-40S models are qualified to be used within any application which refers to an international standard according to: ISO9060: 2018 Spectrally flat pyranometer class C (Pyranometer classification) IEC 61724-1:2017 Class C (PV monitoring system requirement) WMO-No.
  • Page 14 Nuts [M5] × 2 (1) The standard length of the Output cable for the MS-40 / MS-40S is 10 m. If you need a cable longer than 10 m, please contact EKO or your local distributer. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5...

  • Page 15: Getting Started

    By making the glass dome-shaped, light from all directions of the hemisphere can be transmitted with little reflection. (View angle: 180 degrees) and double structure make it less susceptible to changes in output due to wind, etc. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 14...

  • Page 16: Spirit Level

    3. Sun screen/Body MS-40 and MS-40S have a sun screen to prevent any excessive body temperature increase generated by direct sun light.Weather resistant metals are used to reduce the effects and degradation caused by heat radiation, rain, and windblown dusts.
  • Page 17 The sun screen can be removed by loosening the knurled screw and sliding it towards the spirit level direction. *When carrying the MS-40 with sun screen attached, always hold the instrument from the bottom. Holding only the sun screen part may lead to dropping the sensor as it comes off from the sun screen.
  • Page 18 Installing at Tilted Position After the MS-40, MS-40S is adjusted to horizontal position on a 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 Fasten the pyranometer to the base with the 2 bolts [included] and put the sun screen back on the pyranometer. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 18...

  • Page 20: Wiring Procedure

    Figure 5-3B. MS-40S shield wire connection method 2. Wiring procedure Connect the output cable to the MS-40 and MS-40S 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 21 Output parameters MS-40 MS-40S Irradiance ○ ○ Temperature ○ Tilt position ○ Relative humidity ○ Sensor information ○ (*) MS-40S digital output (Modbus 485 RTU / SDI-12) EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 20...

  • Page 22: Analog Output

    MS-40S has two analog outputs (4-20mA and 0-1V). The 4-20mA output is default, the 0-1V(0-10mA) output can be enabled through the “Hibi” software which can be downloaded from the EKO website (MS-40S 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 5-5. 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-40/MS-40S - Instruction Manual Ver. 5 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 Apply Pull-up and pull-down resistors (typically 680 to 850Ω): Necessary to keep the voltage level constant when the transmission line is in a high impedance state. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 24...
  • Page 26 Although a surge protection board is embedded inside the pyranometer, if the cable length exceeds 10 m, add an appropriate SPD or the like to protect the measurement system from lightning surges (see A-8). EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 25...
  • Page 27 (*) When connecting other SDI-12 communication devices, the upper limit may change. DC-12V+ SDI-12 Data Master Ground Sensor Sensor Sensor No. n No.1 No.2 Figure 5-10. Communication Connection with SDI-12 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 26...
  • Page 28 3. Overview wire assignments Table 5-6. Wire Color Codes of MS-40 (Also see [7-3. Output Cables]) Cable Color MS-40 White mV [+] Black mV [-] Shield Shield Figure 5-11. Connector pin number of MS-40 Each number corresponds to the number in Table 5-6.
  • Page 29 [*] When selecting 0-1V output, a precision shunt resistor is required separately. Figure 5-12. Connector pin number of MS-40S Each number corresponds to the number in Table 5-7. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 28...

  • Page 30: Data Logger Settings

    EKO pyranometers states the amount of time, which is necessary to reach 95% of the final measurement value. It is also possible to define a 63.2% response [which is equal to 1-1/e]. This time constant, represented by the symbol τ, is 3 times smaller than the values specified by EKO. The recommended sampling rate for pyranometers is smaller than τ.
  • Page 31 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). Where to find information regarding the MS-40 defaults settings and important parameters: Table 5-8. MS-40 where to find the settings...
  • Page 32 3. Irradiance conversion For MS-40 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., when the sensitivity of the MS-40 pyranometer is about 10μV/W・m-2 or 0.010mV/W・m-2, the maximum...
  • Page 33 ] 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 32...

  • Page 34: Maintenance And Troubleshooting

    6. Maintenance & Troubleshooting 6- 1. Mai nt en a nc e By using the MS-40 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 35 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 34...

  • Page 36: Calibration Method

    6- 2. C alib ra ti on an d Me as u re me nt U nc e rt ainty It is recommended to recalibrate MS-40 pyranometer once every 2 years to verify the good quality of the solar radiation measurements. In the following paragraph the calibration method of EKO pyranometers and their calibration uncertainty is explained.
  • Page 37 6- 3. Tro ubl e s hoo tin g 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 connection, measure the impedance of Output cable [between the “+”...
  • Page 38 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 37...

  • Page 39: Specifications

    7- 1. Sp ec ific a tions 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 40 (2) The operational maximum irradiance is defined as the maximum irradiance exposure level. Beyond this point damage may occur to the sensor. (3) When 4-20mA is 0 to 1,600W･m , 0-10mA/0-1V: 0 to 1,600W･m (default) EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 39...
  • Page 41 Apply the shunt resistor 250 Ω output (Approx. 30mA) (Approx. 27mA) and 20mA output 300mW 640mW Apply the shunt resistor 100 Ω 0-1V output (Approx. 30mA) (Approx. 27mA) and 10mA output EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 40...
  • Page 42 B. Body height 72 mm C. Levelling Screw Height 16 mm D. Width [including Sun screen/Cover] Φ96 mm E. Overall Height [approx.] 101mm Figure 7-1. External Dimensions [MS-40/40S] EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 41...
  • Page 43 Figure 7-3. Output-Cable [MS-40S] Different length (10m standard, 20m / 30m / 40m / 50m optional). 3. EKO Converter Cable（Option） USB Type-A Figure 7-4. EKO Converter cable [MS-40S] EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 42...
  • Page 44 Heater Converts from RS485 → USB for the communication with MS-40S EKO Converter Cable MS-40S and allows to connect to PC via USB terminal. Cable Length:1.8m EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 43...
  • Page 45 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 44...
  • Page 46 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 45...

  • Page 47: 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 MS-40S. Power for the MS-40S can be supplied via USB. (See Figure A3-2).
  • Page 48 RS485 / USB conversion cable from the displayed COM port numbers. If you cannot find a selectable COM port, click the Refresh button and click Select again to try again. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 47...
  • Page 49 If the COM port is not recognized, press the refresh button and try again. Power “ON” the MS-40S within 10 seconds once the "Connecting your sensor" message appears. Figure A3-6. Connecting screen EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 48...
  • Page 50 For manual connections, click “View settings” at the bottom of “CONNECTION FAILED” to go to “Settings screen”. (As for how to set and connect by “Manual connection”, refer to the procedures (4) Manual connection) from the next section. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 49...
  • Page 51 Figure A3-9. Manual connection When the connection is completed, "Connected" is displayed. "XXXX Pyranometer Connected" is also shown in the upper-right corner of the display. Figure A3-10. Connected appear EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 50...
  • Page 52 - “Read” button: Read out the settings. - “Output” button: Output the settings to CSV file Figure A3-12. Apply changes screen “Output” button “Read” button "Save" button Figure A3-13. Settings screen EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 51...
  • Page 53 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 52...
  • Page 54 Voltage(V)/Irradiance(W/m ): 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 53...
  • Page 55 4. "TEMPERATURE" setting items Item Name Setting contents Setting range UNIT Preferred unit °C-Celsius / °F-Fahrenheit / K-Kelvin (temperature unit setting) Figure A3-17. Sensor settings screen EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 54...
  • Page 56 Tilting items using the present tilt angle as 0°. The spirit vial can be used as a reference to readjust the tilt and roll position. The MS-40S X and Y position is factory calibrated. Figure A3-18. Sensor Position setting EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 55...
  • Page 57 Unit: selected from °C (Celsius)”, “°F (Fahrenheit)” or “K (Kelvin)”. (°C: default) <Humidity> Humidity measurement data (Unit: "%RH") <Tilt Angle> Tilt (X axis angle) and Roll (Y axis angle) data EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 56...
  • Page 58 (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-40/MS-40S - Instruction Manual Ver. 5 Pg. 57...
  • Page 59 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 Sensor internal humidity abnormality alert Hibi has a sensor internal humidity indication function, which displays an alert when the sensor internal humidity rises, and an abnormality is detected.
  • Page 60 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 59...
  • Page 61 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 60...
  • Page 62 · 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 or written to. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 61...
  • Page 63 Supply: Supply Voltage Sensor Name: Sensor name (MS-40S) Firm Ver: Firmware version number Hard Ver: Hardware version number L. Coeff: Linearity compensation factor, set by No.182-189 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 62...
  • Page 64 Measurement Mode (default) Sensitivity Sensitivity (LSW) (μV/W・m Sensitivity (MSW) Temperature unit, unit: °C (default) Input Voltage (LSW) AD(mV) Input voltage (MSW) Comp.Irr(W/m Corrected insolation intensity (LSW) EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 63...
  • Page 65 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 64...
  • Page 66 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-40/MS-40S - Instruction Manual Ver. 5 Pg. 65...
  • Page 67 · A fixed value of zero (U16) has been written to an address that is not used. · The "EKO" character is written as the company name registration in register No. 96 and 97. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5...
  • Page 68 20mA defaults use 1600W/m 141 to 161 are Reserve Date of manufacture Date of manufacture in YYYYMMDD format Serial number with 32-bit integer value (maximum value Serial number 4294967295) EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 67...
  • Page 69 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, μV/W・m 194 to 199 are Reserve EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 68...
  • Page 70 · Linear post-correction sun photometer output V(L) = k1 + (k2•V(raw)) + (k3•V(raw) ) + (k4•V(raw) · The default value is k2=1, k1=k3=k4=0, so V(L)=V(raw), and the raw value is used for the corrected pyranometer output. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 69...
  • Page 71 · Do not write to any Coil other than Reboot/Save. · The readout is always zero. A4-14. Register details Table A4-18. Coil register Addr Parameter Type Reboot Save EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 70...
  • Page 72 14: SDI-12 version (represents version 1.4) EKOInst: Company name (8 characters) MS-40S: Sensor model name (6 characters) V32: Sensor version (3 characters) 20000001: Serial number (8 characters) EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 71...
  • Page 73 Read the calibration date of this device. YYYY: AD, MM: month, DD: day. aXCD! <CR><LF> Variable Identify Measurement Commands and Identify Measurement Parameter METADATA depending on Commands are supported. request data EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 72...
  • Page 74 When recalibrating at a recalibration agency other than EKO, the sensitivity constant (μV/Wm ) provided by the agency may differ slightly from the sensitivity constants by EKO. The differences may be caused by differences in the calibration method, differences in the reference standard, measurement uncertainty, and measurement conditions.
  • Page 75 0 - 1600 [W/m2] Modbus RTU Setting Enable/Disable Enable (Default) Address Baudrate 19200 Parity EVEN Reg. type S-series SDI-12 Setting Enable/Disable Disable (Default) Address Baudrate 1200 EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 74...
  • Page 76 However, the type, rating, and connection method of the SPD to be used vary depending on the manufacturer, so please read the instruction manual of each manufacturer carefully. EKO INSTRUMENTS CO., LTD. - Pyranometer MS-40/MS-40S - Instruction Manual Ver. 5 Pg. 75...

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