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PV Met 100 Weather Station

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DECK Monitoring provides information about installation in good faith, but DECK is not
responsible for installation. Installation and electrical wiring should be done by a licensed
electrician who has experience working with energy monitoring equipment.

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Contents

• Unpacking the Unit
• Installing the 10-foot mast
• Installing the MSO Sensor Transmitter
• Installing the panel temperature sensor
• Installing the solar radiation sensor
• Connecting sensors to the Interface Module and MicroServer
• Connecting to MicroServer to RS-485

Unpacking the Unit

The sensor transmitter comes in a custom shipping container. Be careful when removing the device. Unpack the PVMet weather station and verify that all parts are included.

Standard system includes:

• Post mounted unit:

• Silicon pyranometer
• Ambient temperature sensor
• Junction box

• PV module temperature sensor with 50’ cable
• Extended post mount adapter
• Tripod or surface/wall mount hardware

Inspect all system components for obvious shipping damage (Refer to “Important Notice: Shipping Damage” in case of damage). NOTE: Save the shipping carton and packing material in case the unit needs to be returned to the factory.

Installing the unit

The system may be mounted on a tripod or other support structure, however, the bottom of the junction box should be between 7” and 12” above the mounting tube support. The mounting tube support may be a tripod leg, or guy wire attachment.

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Figure 1: Weather station mounting requirements

Considerations for mounting

DECK provides either a tripod or vertical surface mount adapter for the weather station.
Please observe the following instructions when installing:

• The environmental unit is designed to withstand harsh weather conditions but appropriate conduit or raceways should be used for sensor, 
   power and communications wiring.

• The weather station weighs approximately 5lbs. Mounting or support structure should be rated for the appropriate wind loads on site.

• Use appropriate tools to ensure that device is mounted plumb. DO NOT install weather station unit at a horizontal or other angle.

• When using the ground mounted tripod, select a location with a level surface.

• For roof mounts, do not install near a functional chimney. Do not install on an existing 
mast unless you know the mast can tolerate the
   additional weight of the weather station.

• The weather station unit should be mounted at least 5’ off the ground. Stations with wind speed sensors should be mounted at 10’ though this may
   vary depending upon terrain and local wind regime. 

• If the weather station is mounted more than 10 feet off the ground, guy wires should be used to secure the mount. Guy wire attachments must not  
  interfere with instruments.

Installing the solar radiation sensor

While the sensor is integrated with the weather station, the plane of orientation is adjustable so that the device may measure irradiance at either the plane of array orientation, or horizontal radiation.

If the sensor is to be installed to measure plane of array irradiance, use a compass or other tool to ensure that sensor may pivot to the PV array azimuth. With a standard allen wrench, the sensor may be adjusted to the proper tilt angle.

If the sensor is intended to measure horizontal irradiance, verify that the sensor tilt angle is set to zero, and the weather station mount pole is plumb.

Installing the panel temperature sensor

The panel temperature sensor should be mounted to the solar panel backing. Use the included alcohol swab to ensure that the mounting surface is clean before attaching the sensor to the solar panel. Panel temperature sensor wires should be run in conduit where exposed. The panel sensor wire should be connected to “PV Temp Sensor” terminals (Fig 2(D)) inside weather station enclosure.

Connect sensor wires at junction box terminals shown in Fig 2(A). Connect the black and white conductors to the 2 terminals labeled “PV Temp 1”. Connect the bare conductor to the “Shield” terminal.

Connecting the weather station to power

The weather station may be powered at 10-30VDC, with a maximum current draw of 50mA. Power may utilize an available regulated DC supply. Terminal connections should be made in the junction box at Fig 2(B).

Connecting weather station to RS-485 communication bus

Appropriate communications wiring that is compliant with the Modbus specification should be used to connect the device to the communications network.
Belden 3088AE is a qualified example. Connect the signal (+), signal (-), reference/common, and the shield wire to the appropriate terminals (see fig 2(C)). For each span of Modbus wiring, the shield should only be connected on one end.

If the weather station is installed as the final device in the Modbus network, a termination resistor must be installed. This resistor can be set by moving the jumper from the “Common” and “Off” pins.

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