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DS-1000 Operating Manual

Additional Capabilities

page 11

After initialization, the status message changes and the “Take Curve” button is

enabled as shown in Figure 4. This status message indicates that a curve can be

taken by pressing the “Take Curve” button or by pressing Alt-T.

Figure 4. DS-Tracer is pre-charged and ready to immediately take the curve.

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Summary of Contents for DS-1000

Page 1: ...DS 1000 I V CURVE TRACER User Manual Daystar Inc 3240 Majestic Ridge Doc Version 7100 Las Cruces NM 88011 Jan 2016 575 522 4943 pvvern zianet com http www daystarpv com daystar inc...

Page 2: ...This I V curve tracer was built to Daystar Inc specifications by Raydec Inc 8210 La Mirada Suite 700 Albuquerque New Mexico 87109...

Page 3: ...ting a PV Module to the DS Tracer 7 Starting IVPC 8 Taking an I V Curve 9 If There Is an Error 13 Displaying I V Curves 13 Summary of Steps for Taking I V Curves 14 2 0 Panel Layout 15 PV Test Lead Co...

Page 4: ...al Capabilities 27 Temperature Irradiance Inputs 27 Temperature Connections 27 Irradiance Connections 27 Aux Input Connections 28 Multiple Current Ranges 29 External Command Set 29 7 0 Troubleshooting...

Page 5: ...G PRECAUTIONS ARE NOT FOLLOWED THIS INSTRUMENT MUST ONLY BE USED FOR TAKING ELECTRICAL CURRENT AND VOLTAGE I V CURVES OF PHOTOVOLTAIC PV SOLAR MODULES THIS INSTRUMENT MUST NOT BE USED BEYOND ITS OPERA...

Page 6: ...r Isc Short Circuit Current The maximum current a photovoltaic cell can generate with the output terminals shorted I V Current Voltage PV Photovoltaic V Voltage Voc Open Circuit Voltage The maximum vo...

Page 7: ...details on operating the DS 1000 I V Tracer However the basic steps for using the DS Tracer are Install and run IVPC for Windows Connect the DS Tracer to the computer either RS 232 or USB Connect pyr...

Page 8: ...ng or breaking connections to a PV system Connect the DS Tracer to the PV array through a PV system disconnect switch capable of interrupting the short circuit current of the array at peak power volta...

Page 9: ...Appendix B DS 1000 USB Drivers for details on installing these drivers Connecting a PV Module to the DS Tracer The DS Tracer is connected to the PV array or module with the test leads provided Before...

Page 10: ...s a spread sheet that lists all of the I V curve data files stored in the I V curve worksheet When starting IVPC for the first time the Data Grid may be empty if no I V curves have been taken Figure 1...

Page 11: ...to the PV system Connect the computer running IVPC to the DS Tracer From the Curve menu shown in Figure 2 select New Curve or press Ctrl T Figure 2 Select New Curve in the Curve menu to take an I V c...

Page 12: ...re 3 This window provides areas to enter curve information identifying the I V curve The DS Tracer may take several seconds to initialize the tracer hardware A status message indicating that the DS Tr...

Page 13: ...ion the status message changes and the Take Curve button is enabled as shown in Figure 4 This status message indicates that a curve can be taken by pressing the Take Curve button or by pressing Alt T...

Page 14: ...Figure 5 The new curve data is automatically added to the worksheet However the worksheet is not automatically saved to disk Figure 5 Example of I V curve It s possible to return to the Data Grid with...

Page 15: ...IVPC directions given when the error occurs Most errors occur immediately after selecting New Curve from the Curve menu The most common problem results from a communication error Incorrect COM port se...

Page 16: ...st lead to the PV system Connect the red clip to PV positive and the black clip to PV negative Be sure to connect the tracer to the PV system through a system disconnect switch rated for Isc and Voc T...

Page 17: ...USB MAIN USB 11 10 2 A 250V FAST FUSE POWER FULL CHARGE 2 4 5 1 A 250V SLOW FUSE 50 60 Hz 85 264 V AC 25V DC AUX C HARGE DS 1000 PHOTOVOLTAIC I V CURVE TRACER 1000V DC 1 PV 12 Manufactured by Raydec...

Page 18: ...n the test leads For maximum safety the DS Tracer should be connected through a PV system disconnect rated at the PV system Voc and Isc values See Figure 8 A system disconnect switch provides a way to...

Page 19: ...f switch the power switch off wait several seconds and turn the switch back on Full Charge Indicator When this LED lights its indicates that the DS Tracer battery is fully charged When fully charged t...

Page 20: ...ocouple inputs for measuring PV array module temperatures Refer to the IVPC Help system for details on making temperature measurements and Appendix C DS 1000 Technical Specifications RS 232 Serial Por...

Page 21: ...Inputs The model DS 1000 has two irradiance inputs for measuring pyranometers These inputs measure DC voltages only In order to use a reference cell the cell must have a shunt resistor attached to co...

Page 22: ...ser is encouraged to ensure the DS Tracer is always used with PV systems within its voltage and current rating and that auxiliary equipment such as inverters power conditions and charge controls are n...

Page 23: ...ircuit current reading to be made After the capacitive load charges to Voc the curve sweep is complete At this point the circuitry discharges the capacitors through a resistive load Sweep Speed Curve...

Page 24: ...is done by dividing the rate by the number of PV cells in series If the previous example had fifty cells in series the rate of each cell would be 8000 V S 50 cells 160 V S cell Different PV technologi...

Page 25: ...he DS 1000 has a universal AC power supply and therefore will work with single phase AC line voltages from 85 Vac to 264 Vac 50 60Hz To charge the battery from AC line power connect the tracer to the...

Page 26: ...off when recharging the battery It will not harm the battery to leave the DS Tracer connected to the power source after the battery is fully charged Note The full charge indicator may come on for a sh...

Page 27: ...cle Power line surges or internal faults could cause this fuse to fail Return the DS Tracer for repairs if this fuse blows repeatedly Replace this fuse with the type indicated on the DS Tracer panel A...

Page 28: ...or systems with many modules in series Avoid damage to a thin film module by inserting a by pass diode across the module terminals as shown in Figure 9 This diode limits the reverse voltage to approxi...

Page 29: ...I V curves Temperature Connections Two standard thermocouple connectors are available on the front of the DS 1000 A standard DS 1000 comes with Type T thermocouple connectors In order to accurately a...

Page 30: ...the DS 1000 Refer to Appendix C DS 1000 Technical Specifications for details on measurement ranges Note These inputs are fully differential and the applied signal must be referenced to circuit common...

Page 31: ...ypically the IVPC program controls the DS 1000 however users may want to write software to perform custom tracer operations or integrate the DS 1000 into a larger data acquisition system This is possi...

Page 32: ...are broken near clips DS Tracer Stops Working Locks Up Battery out of power charge battery Unknown Reasons reset DS Tracer by recycling power Cannot establish connection of external computer to DS Tra...

Page 33: ...nt to the DS Tracer before the previous command has finished Wait for return prompt ERROR 16 PARAMETER TOO LONG The maximum length of any command line parameter is 15 characters ERROR 17 TOO MANY PARA...

Page 34: ...rror Codes DS 1000 Operating Manual ERROR 50 INVALID NUMERIC PARAMETER Parameter must represent valid numeric value ERROR UNKNOWN ERROR Some type of unknown error has occurred Check parameters for pro...

Page 35: ...hrough a COM port IVPC 3 supports COM ports 1 through 16 Therefore after being created the virtual COM port must be assigned a COM port number in this range It is possible for the operating system to...

Page 36: ...nnecting the DS 1000 to a computer using the USB connection Windows recognizes that new hardware has been connected and begins the process of installing the driver The instructions on the CD ROM provi...

Page 37: ...5 0 2 50 mA 50 mA 0 1 0 2 3 mA 10 A 5 mA 5 mA 0 05 0 2 5 mA 50 mA 0 2 0 4 300 uA 1 A 0 5 mA 0 5 mA 0 07 0 2 0 5 mA 0 5 mA 0 35 0 9 30 uA Irradiance and Aux Input Accuracy Range Error 25 C Error 0 50 C...

Page 38: ...nual General Specifications Power 85 Vac to 264 Vac 50 60 Hz Battery 5 A Hr sealed lead acid EnerSys 0809 0020 Hours of Use Up to 12 Hrs on full battery charge Charge Time Less than 8 hours Size 46 cm...

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