SPN1 Sunshine Pyranometer
Total (Global) and Diffuse Radiation and Sunshine Duration sensor.
with thermopile sensors and precision glass dome needing no routine
adjustment or polar alignment.
Quick Start Guide version 3.0
Delta-T Devices Ltd
Summary
This guide explains how to use the SunRead PC software to check the SPN1 is
working, and how to connect to and program a GP1 data logger.
Unpacking
The SPN1 is supplied with
Serial cable SP-BF-RS01
Analogue cable SP-BF/w-05
User Manual and this Quick Start Guide
Calibration certificate
Optional accessories
Levelling baseplate SPN1/BP
Support arm SPN1/ARM
Spare desiccant canisters SPN1-SD
Overview
Construction
Indicators
Red LED flashes
when taking readings
Humidity
indicators
Upper
Lower
Desiccant canister
30% pink = early warning
Renew if 50% or
upper indicator pink
Bubble
level
Cabling Options
Maximum Cable Lengths
Serial cable: the maximum length usually depends on how good the line driver is in
the PC, and can typically vary from 5 to 100m.
Analogue cable: 100m - provided the power supply at the SPN1 exceeds 5V at 2mA
for sensor alone, or 12V at up to 1.5A for heater.
Power: Don't exceed the maximum specified supply voltage of 15V.
For a 15V supply, the heater will work as intended up to 50m cable length, and with a
reduced effectiveness for longer cable lengths.
Note: Always use differential sensor measurement when using data loggers.
(The heater return current can cause large single-ended measurement errors).
System Cabling Options
© 2013 Delta-T Devices Ltd
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System Overview
SunRead
25.3
DeltaLINK
RS232 serial link logger to
PC running DeltaLINK
via 1.5m serial cable
type GP2-RS232
(or GP1-RS232 for GP1 logger)
22.1
RS232 serial link from SPN1
to PC running SunRead
via 1.5m serial cable type SP-BF-RS01
Various GP2 (or GP1) Logger
network cabling extension
options are available.
Can include flying leads to
transmit external DC power to
logger and SPN1 but not to
SPN1 heater
For set-up, test,
real-time readings
and PC logging
Serial extension cables
type SP-BF-RS10 (10m)
Data Logger
Analogue
8-way M12
connector
Analogue extension cables
type EXT/8W-x
(x = 05, 10 or 15 m)
© 2013 Delta-T Devices Ltd
Serial
5-way M12
connector
Avoid
ground
loops
5m analog signal cable
type SP-BF/w-05
to data logger and/or heater power
SPN1 heater power
12-15V DC 1.5A
Page 4
Use with a PC running SunRead
Power connection options
© 2013 Delta-T Devices Ltd
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Use SunRead to check the SPN1
About SunRead
Displays Total (global) and Diffuse radiation and sunshine status
Use for setting up and testing SPN1
Runs on your PC, connected directly to SPN1 via SP-BF-RS01 cable
Simple logging capability
Installation Requirements:
PC running Windows XP, 7 or 8
One free RS232 serial port, or USB-RS232 adapter
DVD drive for software installation
Cable SP-BF-RS01 (not intended for outdoor use)
Delta-T Software and Manuals DVD
Acrobat Reader for reading documentation (free download from www.adobe.com)
Installation
1.
Install the DVD in the PC. On most PCs, installation will start automatically. If it
does not, run the file setup.exe in the root folder of the DVD. This will display an
index of software and also of documents.
2. Click on Install SunRead software.
3. Check the DVD and also our website at http://www.delta-t.co.uk/support.html for
the latest documentation and copy it to your PC if you wish.
For further installation information see SunRead Release Notes on the DVD.
Note 1: Most PCs, but not all, can power the SPN1 via the serial port. If not, power the
SPN1 via the analogue cable – see the analogue cable wiring diagram.
Start SunRead
1.
Connect your SPN1 to a spare serial port or via a USB-RS232 adapter to
your PC, using cable SP-BF-RS01 plugged into the 5-pole connector- see
Overview diagram.
© 2013 Delta-T Devices Ltd
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2.
Run SunRead to display the screen shown below.
Logging with SunRead
1.
2.
3.
Select Log to display
the logging window.
Enter the logging
options (see below)
Click Start Logging.
Logged data is displayed in
real-time, and can be
saved to file as .csv files
which can analysed in
Excel.
Logging options
Log period: sets logging frequency.
Avg period: sets averaging period.
Log to file: saves each reading to file as it is logged.
Individual sensors: records all 7 individual thermopile sensors.
See also RS232 Commands in SPN1 User Manual
© 2013 Delta-T Devices Ltd
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Set up Data Logger
Outputs
The analogue connector provides voltage outputs for Total (global) and Diffuse
radiation, plus a digital output for sunshine state.
It is suitable for recording by many data loggers via cable SP-BF/w-05.
Note : Avoid simultaneous connection of serial cable to a PC and
analogue outputs via a logger to a PC - it may create an earth loop
which may reduce signal accuracy.
Connect analogue cable to logger
GP2: see SPN1 Info Panel in DeltaLINK, and also the GP2 User Manual.
GP1: see SPN1 Sunshine Recorder Program in DeltaLINK Help.
DL2e: see SPN1 sensor Help in Ls2Win (service release 5).
Figure 1: Wiring to GP1 and GP2 data logger and to heater power supply
* Note: Connected internally in the SPN1 to Power 0V
** Note: Analogue cable SP-BF/w-05 and serial cable SP-BF-RS01 braids are both earthed via
the connector shells to the SPN1 case and terminate at the data logger or PC case or ground.
To avoid ground loops do not interconnect braids elsewhere.
*** Note: SPN1 draws power from Power V+, CTS (PC serial port), or Heater +, whichever
voltage is highest. Most PCs can power the SPN1 via the serial port.
Analogue cable wiring for loggers and heater
White (Total output) and Brown (Diffuse output): connect to data logger voltage
inputs. The normal range of this output is 0V – 1.3V
Green: connect to data logger signal ground or –ve input terminal.
Yellow: connect to a data logger digital input. It gives a short circuit to ground when
sunshine is present, and open circuit with no sunshine. Alternatively, connect to a
resistance input with a precision resistor in parallel (see also SPN1 User Manual).
Grey 0V and Pink V+ (SPN1 power): apply >5V to power the SPN1 and enable the
sensor output signals.
Red Htr+ and Blue Htr- (heater power): connect to a separate, isolated 12V DC 1.5A
power supply. The actual heater current depends on the temperature. In cold climates
a 40Ah battery would only last one day, so use a mains-powered regulated 12V DC
power adaptor.
Do not apply AC mains power to the SPN1.
© 2013 Delta-T Devices Ltd
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Program a GP1 Logger
About DeltaLINK-PC software
Programs the GP1 logger, starts and stops
logging, displays real-time graphs, retrieves,
graphs and displays logged SPN1 data.
Runs on your PC, connected to GP1
via GP1-RS232 cable
Includes an SPN1 logging program
You need DeltaLINK 3.0 or later installed along with
the Excel Dataset Import Wizard
(see Software and Manuals DVD)
Run DeltaLINK-PC
1.
2.
3.
4.
5.
Connect PC to the GP1 with cable GP1-RS232, either using a spare serial port or
USB-RS232 adapter.
Run DeltaLINK. The GP1 should respond, populating the DeltaLINK Logger page
with status information about the logger.
Click on Program and then Change to create a new logging program.
Select Edit, New Program and select SPN1 Sunshine Recorder.
Define the logging program you require, from the options as shown.
Click Apply to install the program in the GP1.
Click on the Sensors page and Refresh to show a real-time graph of Total
(Global), Diffuse and sunshine status – to check everything seems to be working.
8. On the Logger tab select Start to start logging.
9. Periodically in the Dataset tab select Refresh to inspect logged data.
10. Save it to file.
11. To import data into Excel, install the Dataset Import Wizard from the Start Menu,
Delta-T program group, then (in Excel 2010) select Add Ins, Import Dataset(s).
.
6.
7.
© 2013 Delta-T Devices Ltd
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Program a GP2 Logger
Before you start you need DeltaLINK connected to your GP2 or to the GP2 Simulator
(see also the GP2 User Manual and/or DeltaLINK Help).
© 2013 Delta-T Devices Ltd
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Install the SPN1 on site
It may be installed at any latitude.
Mount the SPN1 horizontally and at any polar orientation i.e. relative to North.
Use either the Levelling baseplate type SPN1/BP, or Support arm type SPN1/ARM.
M8 attachment bolts are provided with both.
Do not touch any socket cap screws under the flange holding the dome. These are
sealed during manufacture.
Connect the heater power, data logger, and serial port if required, using the cables
shown in the Overview and the wiring connections shown in Fig 1.
Maintenance
Keep glass dome clean using clean water with mild detergent or Isopropyl Alcohol.
If any two desiccant indicators turn pink, unscrew the desiccant canister from the
indicator cap, and replace with a fresh one (type SPN1-SD).
Notices: The Sunshine Pyranometer is protected by patents EP1012633 & US
6417500. EMC certification: refer to the SPN1 Regulatory Information on the Delta-T
Software and Manuals DVD
© 2013 Delta-T Devices Ltd
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Specifications
The following accuracy figures give 95% confidence limits, i.e. 95% of individual readings will be
within the stated limits under normal climatic conditions. For full specs see SPN1 User Manual
Overall accuracy: Total
(Global) radiation and
Diffuse radiation
± 5%
Daily integrals
± 5% ±10 W.m-2 Hourly averages
± 8% ±10 W.m-2 Individual readings
Resolution
0.6 W.m-2 = 0.6 mV
Range
0 to >2000 W.m-2
Analogue output sensitivity
1 mV = 1 W.m-2
Analogue output range
0-2500 mV
Sunshine status threshold
120 W.m-2 in the direct beam
Other specifications
Accuracy: Sunshine status
± 10% sun hours with respect to the threshold
Accuracy: Cosine Correction
± 2% of incoming radiation over 0-90° Zenith angle
Accuracy: Azimuth angle
± 5% over 360° rotation
Temperature coefficient
± 0.02 % /°C typical
Temperature range
-20 to +70°C
Stability
Recalibration recommended every 2 years.
Response time
< 200 ms
Spectral Response
400-2700 nm
Spectral sensitivity
10% typical
Non-linearity
< 1%
Tilt response
Negligible
Zero Offsets
< 3 W.m-2 for a 5°C/hour change in ambient temperature
< 3 W.m-2 dark reading
Latitude capability
-90° to + 90°
Environmental: Sealing
IP67
Sunshine status output
No sun = open circuit.
Sun
= short circuit to ground
Power requirement
2 mA (excluding heater power), 5 V – 15 V DC
Heater power
12 V – 15 V DC, up to 1.5 A
Heater control
Continuously variable up to 20 W output for external
temperatures below 0°C
Lowest snow & ice-free
temperatures (using heater)
Mounting options:
-20°C at 0 m/s wind speed
-10°C at 2 m/s wind speed
3 x M5 tapped holes in base; 108mm pcd, 120°spacing.
(takes optional Levelling baseplate SPN1/BP)
M8 tapped hole on side (takes Support Arm SPN1/ARM)
Size & Weight
126 mm dia. x 94 mm high, 786 gm
Delta-T Devices Ltd
130 Low Road, Burwell
Cambridge CB25 0EJ
UK
Tel:
+44 1638 742922
Fax:
+44 1638 743155
e-mail: [email protected]
web:
www.delta-t.co.uk
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