Summary of Contents for Obvius A89WS
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Page 1: Weather Station
Weather Station Obvius, LLC Installation and Operation Manual Model A89WS generation, systems manufactured after July 2010) Date Jan 18, 2011 Page 1 Draft Copy A89WS Weather Station (gen 3) -
Page 2: Limited Warranty
Obvius's authorized facilities; (4) has not been sold subject to other warranty terms specified at the time of sale; and (5) is still owned by the original purchaser. This warranty provides specific legal rights that may be varied by state law. Obvius's products are not designed for life or safety applications. -
Page 3: Table Of Contents
Software setup and configuration................................. 19 Modbus Configuration ..................................19 Modbus Address and Dipswitch Configuration.............................19 Setup and testing with Obvius Config Console (OCC) (optional)......................20 Setup with Obvius AcquiSuite................................21 Channel 1: A89WS-TH1, TO1: Air Temperature Probe........................21 Channel 2: A89WS-TH1: Air Humidity Probe..........................22 Channel 3: A89WS-PY1: Pyranometer............................22... -
Page 4: Overview
Installation Checklist The installation of the Obvius weather station requires a number of tools and supplies to complete the installation. The following list provides a representative sample of what may be required for installation, however site specific issues may require additional tools or supplies. -
Page 5: Hardware Overview
A89WS-MK1. Note: The pyranometer kit is intended to be mounted vertically on the weather station. The optional kit A89WS-MP1 should be ordered separately for sites that require the pyranometer to be mounted on the solar panel to match the panel's angle. -
Page 6: List Of Sub-Assemblies
Weather station control box- NEMA 4x, 24VDC power supply, UCLC amplifier, 2 plug receptacles- Pyranometer control box, Cell temperature, water tight gasket. YWX0483 Weather station- NEMA 4x, 24VDC power supply, UCLC amplifier, 3 plug receptacles- Pyranometer, Anemometer, water tight gasket. Page 6 Draft Copy A89WS Weather Station (gen 3) -
Page 7: Features And Specifications
-10 ~ +70c IO module: A8332-8F2D Accuracy: +/- 0.25% (4-20mA mode inputs) +/- 1% for cell temperature sensor (resistive mode inputs) Operating temperature: -30 ~ +70c Protocol: Modbus/RTU, RS-485, 9600, N81 Page 7 Draft Copy A89WS Weather Station (gen 3) -
Page 8: Hardware Installation
4) Using a computer or laptop, configure the weather station and the AcquiSuite (or other Modbus data acquisition server). The following sections of the manual cover hardware installation and component details for each of the steps listed above. Page 8 Draft Copy A89WS Weather Station (gen 3) -
Page 9: A89Ws-Mk1: Weather Station Mounting Kit
A89WS-MK1: weather station Mounting kit Kit contains: Tripod, Mast, and Arm. Location: Before installing the weather station, a suitable location for the sensors must be selected. Ensure that the weather station is located in as open and unobstructed area as possible such as a rooftop location or a parking lot shade structure. -
Page 10: Ywx0482: Weather Station Control Box
WARNING: After wiring the system, remove all scraps of wire or foil shield from the electrical panel. This could be dangerous if wire scraps come into contact with high voltage wires. Page 10 Draft Copy A89WS Weather Station (gen 3) - Page 11 The weather station uses RS-485 Modbus RTU to communicate with a Master device such as an AcquiSuite. Attach a suitable twisted pair cable to the RS-485 connector provided. Observe polarity markings +, - and Shield. Page 11 Draft Copy A89WS Weather Station (gen 3)
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Page 13: Ywx0483: Weather Station Control Box
WARNING: After wiring the system, remove all scraps of wire or foil shield from the electrical panel. This could be dangerous if wire scraps come into contact with high voltage wires. Page 13 Draft Copy A89WS Weather Station (gen 3) - Page 14 The weather station uses RS-485 Modbus RTU to communicate with a Master device such as an AcquiSuite. Attach a suitable twisted pair cable to the RS-485 connector provided. Observe polarity markings +, - and Shield. Page 14 Draft Copy A89WS Weather Station (gen 3)
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Page 16: A89Ws-An1, A89Ws-An2: Anemometer Kit
A89WS-AN1, A89WS-AN2: Anemometer kit Kit contains: Anemometer sensor The A89WS-AN1 and A89WS-AN2 sensor kits are identical except for the cable length. The A89WS-AN1 has a 40' cable. The A89WS-AN2 has a 105' cable. The installation procedure for both kits is the same. -
Page 17: A89Ws-Py1: Pyranometer Kit
The pyranometer kit includes a calibration certificate. Do NOT DISCARD THE CALIBRATION CERTIFICATE. Take time to verify the serial number printed on the calibration certificate matches the one on the pyranometer sensor. Page 17 Draft Copy A89WS Weather Station (gen 3) -
Page 18: A89Ws-Mp1: Pv Mounting Bracket - Pyranometer (Optional)
Do not over- tighten the set screw or it will crack the pyranometer. Attach the pyranometer base plate to the top of the A89WS-MP1 mounting bracket as shown to the left. Place the three mounting bolts in the holes, and tighten the attachment bolts and nuts to secure the pyranometer in place flush against the bracket. -
Page 19: A89Ws-Tc1, A89Ws-Tc2: Cell Temperature Kit
A89WS-TC1, A89WS-TC2: Cell Temperature Kit Kit contains: Cell temperature probe with cable and plug. The cell temperature probe is a 10k ohm type 2 thermistor sensor in a bullet probe configuration. The kit comes in two versions: TC1 has a 50' cable. -
Page 20: A89Ws-Th1: Air Temperature And Humidity Probe
Note: The A89WS-TH1 and TO1 kits have a similar appearance and the hardware mounting is the same. The only difference is that the A89WS-TH1 kit includes a humidity sensor in the air probe, and the A89WS-TO1 air probe does not. -
Page 21: Software Setup And Configuration
Software setup and configuration The Obvius A89WS weather station uses an A8332-8F2D I/O Module to convert the sensor data to a Modbus output. The A8332-8F2D must be configured to read each of the sensors. Each input on the A8332-8F2D represents a specific sensor input, and two inputs remain unused. -
Page 22: Setup And Testing With Obvius Config Console (Occ) (Optional)
One way to do this is to use an AcquiSuite data acquisition server to configure and display the data points from the weather station. If an AcquiSuite is not available, a free software tool can be downloaded from obvius.com that can help with both configuration and confirm the operation of the device. -
Page 23: Setup With Obvius Acquisuite
The following screen should be displayed. Notice the weather station shows up in the list at address 51. The actual device type is that of the io module, an Obvius A8332-8F2D. Select the weather station device 51 from the device list. Next, click the configure button at the bottom of the page. Each data point will now have a “Configure Point”... -
Page 24: Channel 2: A89Ws-Th1: Air Humidity Probe
Channel 2: A89WS-TH1: Air Humidity Probe Configure the following options Sensor Name: “Air Humidity” • Input Mode: “Current 4-20mA” • Sensor Make and Model: • “A89WS-TH1 Veris HO2XMSTA1-02” Sensor Minimum Range: “0” • Sensor Maximum Range: “100” • Engineering Units: “%RH”... -
Page 25: Channel 4: A89Ws-Tc1,Tc2: Cell Temperature
The Curve Scale option has a provision for converting 10K Type 2 to either Degreees F or C. You may select either conversion depending on your project needs. Be sure to set the Engineering Units field to match the unit of measure for your conversion. Channel 5: A89WS-AN1,AN2: Anemometer / wind speed Configure the following options Sensor Name: “Wind Speed”... -
Page 26: Channel 6: A89Ws-An1,An2: Anemometer / Wind Direction
Channel 6: A89WS-AN1,AN2: Anemometer / wind direction Configure the following options Sensor Name: “Wind Direction” • Input Mode: “Current 4-20mA” • Sensor Make and Model: • “A89WS-AN1 (NovaLynx 200-WS-02)” Sensor Minimum Range: “0” • Sensor Maximum Range: “360” • Engineering Units: “Degrees”... -
Page 27: Setup With 3Rd Party Modbus Master
Flex I/O Module Modbus information, specific to the Weather Station (For complete details such as reserved or pulse input registers or values not listed here, refer to the latest Obvius documentation regarding the A8332-8F2D Modbus Flex IO Module Installation and Operation Manual). - Page 28 6 max MSW 40060 UINT32 input 6 max LSW 40061 UINT32 input 7 max MSW 40062 UINT32 input 7 max LSW 40063 UINT32 input 8 max MSW 40064 UINT32 input 8 max LSW Page 28 Draft Copy A89WS Weather Station (gen 3)
- Page 29 5V internal power supply voltage monitor. scale: x100, volts 1028 41029 UINT16 RS485 baud rate. 2=9600, 3=19200. Modbus function 0x11 Slave ID response will report the following: "Obvius, A8332-8F2D, IO Module, 8-Flex, 2-DO", id=48 Page 29 Draft Copy A89WS Weather Station (gen 3)
- Page 30 41.9º F, which is about half of the Air Temperature range listed above. Use similar formulae to derive the values for the other sensors based on the register values for those types. Resistive measurements may require curve scales. Page 30 Draft Copy A89WS Weather Station (gen 3)
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Page 31: Recommended Maintenance Of Third Party Devices
Some of the sensors included in the weather station require either replacement or re-calibration after deployment. A89WS-PY1: LI-COR recommends that the LI-200SZ Pyranometers be calibrated every two years to maintain the sensor accuracy. This requires the device to be sent to LI-COR (402) 467-3576 for recalibration.