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NRG Systems 11174, Instructions Manual

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NRG INSTRUCTIONS

 

 

 

SRA System | Soiling Measurement Kit

  

 

 
 
 

SRA Soiling Measurement Kit Instructions      
Rev. 6.0 

[email protected] | Page 4 

1 November 2017 

INTRODUCTION  

This document explains how to integrate the Soiling Measurement Kit onto NRG Systems’ SRA tower.  
The process includes assembling and installing hardware to the tower and shelter box, wiring the system 
to the logger, and configuring the logger channels to read the signals.  The Soiling Measurement Kit can 
be installed on any NRG Systems Solar Resource Assessment (SRA) tower equipped with a 
SymphoniePRO logger.  

It is recommended that two people perform this installation. 

MATERIALS & TOOLS 

Inside the Kit 

 

PV panel assembly 

 

Angle adjustment boom 

 

U-bolts & mounting brackets 

 

Interface Module, DIN rail, & wiring cable 

 

Required Tools 

 

3/16” hex key 

 

5/32” hex key 

 

7/16” combination wrench 

 

3/4” combination wrench 

 

Small flathead screwdriver 

 

Small diagonal cutters or snips 

 

6ft stepladder 

 

Elevation angle meter  

 

Compass or GPS (Required for initial SRA tower orientation, optional for panel orientation) 

 

Electrical tape 

 

Documentation equipment (Camera, pen, & paper) 

 

Windows PC with SymphoniePRO Desktop Software loaded, USB cable type-A to type-B 

 

Gloves 

 

Loctite 242 (optional) 

 

Digital Voltmeter (optional) 

 

Wire strippers (optional)

Summary of Contents for 11174

Page 1: ...Soiling Measurement Kit NRG SRA System Kit 11174 Authors Technical Services ...

Page 2: ...npack all items 5 1 2 Mount upper U bolt to tower 6 1 3 Mount PV panel assembly to upper U bolt 7 1 4 Attach the angle adjustment boom to PV assembly 8 1 5 Mount the angle boom to the tower 9 1 6 Adjust the PV panel angle 10 1 7 Secure tighten all hardware 11 SECTION 2 WIRING AND MOUNTING THE INTERFACE MODULE 12 2 1 Connect the 4C cable 12 2 2 Mount DIN rail to shelter box back plate 13 2 3 Wire t...

Page 3: ...Affix Interface Module to DIN rail wire snesor signals to the logger wiring panel 15 2 7 Reconnect wiring panel to the logger 16 SECTION 3 LOGGER PROGRAMMING CONFIGURATION 17 3 1 Programming the SymphoniePRO logger 17 Temperature Clean 17 Temperature Soiled 18 IscClean 18 IscSoiled 19 3 1 2 Scale Factors and Offsets Summary 19 3 1 3 Saving the Channel Configuration 20 SITE MAINTENANCE 20 DATA PROC...

Page 4: ...ower equipped with a SymphoniePRO logger It is recommended that two people perform this installation MATERIALS TOOLS Inside the Kit PV panel assembly Angle adjustment boom U bolts mounting brackets Interface Module DIN rail wiring cable Required Tools 3 16 hex key 5 32 hex key 7 16 combination wrench 3 4 combination wrench Small flathead screwdriver Small diagonal cutters or snips 6ft stepladder E...

Page 5: ...rt nrgsystems com Page 5 19 December 2018 SECTION 1 ASSEMBLING THE SOILING MEASUREMENT KIT 1 1 Open and unpack all items Verify that all contents are present and undamaged Leave PV panel assembly inside the box for now to prevent the panels from getting scratched Figure 1 1 Packaged Soiling Measurement Kit ...

Page 6: ...the NRG SRA tower using the 3 4 wrench Figure 1 3 Make sure that the 7 16 bolt heads are facing down and the slide nuts are facing upwards Do not overtighten the U bolt nuts Note The lower U bolt will be mounted to the tower approximately 15 below the upper U bolt later Verify that there is space on the tower tube at this location for the lower U bolt Figure 1 2 U bolts and brackets lower left upp...

Page 7: ... to dry slightly then reattach slide nuts to the bolts leaving them loose Otherwise loosen the slide nuts on the upper U bolt bracket so they are flush with the end of the bolts Figure 1 4 Figure 1 4 Slide nuts circled on the upper U bolt bracket Remove the PV panel assembly from the box and slide the short hinged section of mounting rail onto the slide nuts Figure 1 5 Use 2 people if possible Fig...

Page 8: ...bly Attach angle boom to the lower mounting rail of PV assembly approximately 4 5 from the left side of the rail Figure 1 7 The bolts holding the hinge to the end of the angle boom must be loosened slightly in order to pivot the hinge Loosen the slide nut on the end of the hinge enough to mount it to the rail The slide nut is inserted into the channel opposite of the PV panels Once in position tig...

Page 9: ...lt assembly but leave slide nut bolt attched through the outer bracket Figure 1 8 Figure 1 8 Remove the rubber angle boom end cap and insert slide nut bolt bracket into channel opposite the SRA tower Tighten bolt slightly to keep bracket at approximately 3 from the end of the hinge Figure 1 9 Figure 1 9 Measure 15 down the tower from the upper U bolt Mark measurement with permanent marker if desir...

Page 10: ...ends of the U bolt Place outer bracket and angle boom through the ends of the U bolt Figure 1 9 Tighten nuts with 3 4 wrench Do not overtighten Figure 1 10 Location of lower U bolt measured from the upper U bolt 1 6 Adjust the PV panel angle Adjust the panels to your desired angle using the angle boom and verify with angle finder Figure 1 11 If the boom does not slide freely then bolts in the syst...

Page 11: ...upport nrgsystems com Page 11 19 December 2018 1 7 Secure tighten all hardware Tighten down all hardware sufficiently enough to prevent any unwanted movement Figures 1 12 1 13 1 14 Figures 1 12 1 13 1 14 Tighten the bolts in the system The system is now ready to be wired to your SymphoniePRO data logger ...

Page 12: ...mounts inside the FRP shelter box on the included DIN rail section Figure 2 1 Interface Module cabling DIN rail mounting bolts IMT Temp Sensor Instructions 2 1 Connect the 4C cable Attach the 4C cable to the Interface Module according to Table 2 1 The cable ends are labeled for guidance Table 2 1 Wire Color Interface Module Location 26 Channel Wiring Panel 16 Channel Wiring Panel Black GND 16 26 1...

Page 13: ... rail mounted to shelter box backing plate If desired the DIN rail can be affixed to the back plate using the supplied self tapping screws 2 3 Wire the PV panels to the interface modules Unroll the PV panel and route them down the SRA tower as desired and into the holes on the bottom of the FRP shelter box Route through the interior of the shelter box as desired then attach the ends to the appropr...

Page 14: ... Unpeel the backing and mount the boxes to back right of the shelter box if looking at it straight on as shown in Figure 2 4 below 3 Hold the box in place for at least a minute to properly bond the box to the shelter box Note the amplifier boxes should be mounted horizontally with a drip loop on either end of the cable to avoid water ingress Figure 2 4 IMT Amplifier Box Installation 2 5 Connect PV...

Page 15: ...wo 0 5 V inputs PV inputs IscCLEAN and IscSOILED o Each input requires a 9132 P SCM cards o The sensor signals come from the Interface Module o The Isc outputs require a single 12V excitation EXC and ground connection GND Table 2 2 provides an example of how the sensor wires can be connected to the wirng panel any combination of P SCM channels can be used 20 26 Channel Sensor Output Wire Color Ter...

Page 16: ...Kit Instructions Rev 6 0 support nrgsystems com Page 16 19 December 2018 Figure 2 6 2 7 Reconnect wiring panel to the logger Reattach your SymphoniePRO wiring panel cable The Soiling Measurement Kit is now completely wired and ready to be programed into your SymphoniePRO logger ...

Page 17: ...he sidebar Expand the desired channels for the Soiling Measurement Kit For the purposes of these instructions channels 21 22 24 26 are used 3 1 Programming the SymphoniePRO logger Temperature Clean Expand Channel 21 and choose Custom Analog 0 1V from the Load From Defaults drop down menu Choose P SCM 9135 0 to 30 V SE Input Constant 12V EXC from the SymphoniePRO Signal Conditioning Module P SCM dr...

Page 18: ...SE Input Constant 12V EXC from the SymphoniePRO Signal Conditioning Module P SCM drop down menu Edit the Description Scale Factor Offset and Units as show in the image below IscClean Expand Channel 24 and choose Custom Analog 0 5V from the Load From Defaults drop down menu This will auto select P SCM 9132 0 to 5 V SE Input Constant 12V EXC from the SymphoniePRO Signal Conditioning Module P SCM dro...

Page 19: ...to select P SCM 9132 0 to 5 V SE Input Constant 12V EXC from the SymphoniePRO Signal Conditioning Module P SCM drop down menu Edit the Description Scale Factor Offset and Units as show in the image below 3 1 2 Scale Factors and Offsets Summary Table 3 1 Signal Input Channel Input Type Scale Factor Offset Units TempCLEAN 21 Analog 0 30 V 13 40 Deg C IscCLEAN 24 Analog 0 5 V 0 3125 0 A TempSOILED 22...

Page 20: ...ughly with deionized water and a soft non abrasive cloth about once a week or as recommended by your analyst Deionized water is free from calcium and salt so it will not leave deposits on your PV panels Certain sites may have very abrasive mineral deposits so be mindful of abrasion when cleaning the PV panels Rainfall also has a natural cleaning effect and should also be recorded at the site with ...

Page 21: ...stems com Page 21 19 December 2018 One good reference paper which defines a soiling ratio is called Accurately Measuring PV Soiling Losses with Soiling Station Employing Module Power Measurements If you are unsure how to process the data please consult with your analyst as there are various ways to handle the data ...

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