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Wavelength Electronics Laboratory Series User Manual

Low-noise qcl driver
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USER GUIDE
Low-Noise QCL Driver — Laboratory Series
TABLE OF CONTENTS
GENERAL OVERVIEW
SAFETY
QUICK CONNECT GUIDE
PIN DESCRIPTIONS
EXTERNAL MODULATION TRANSFER FUNCTIONS
ELECTRICAL SPECIFICATIONS
THEORY OF OPERATION
OPERATING INSTRUCTIONS (STAND-ALONE)
OPERATING INSTRUCTIONS (REMOTE)
TROUBLESHOOTING
ADDITIONAL TECHNICAL NOTES
MECHANICAL SPECIFICATIONS
CE DECLARATION OF CONFORMITY
WARRANTY & CERTIFICATION
1
Covered by U.S. Patents 6,696,887; 6,867,644 and 7,176,755. Licensed from Battelle Memorial Institute
PAGE
17
22
25
27
28
29
e
Pb
RoHS
ORDERING INFORMATION
2
PART NO
3
QCL500 LAB
QCL1000 LAB
4
QCL1500 LAB
6
QCL2000 LAB
6
NOISESCAN
7
55-110014
9
55-110015
9
WCB310
QCL TL LOW
QCL TL 1500
QCL TL 2000
RCKMT-LAB SNGL
RCKMT-LAB DUAL
INTLK REPL KIT
(included with purchase)
Applies to Product Revision A
DESCRIPTION
500 mA Low Noise QCL Instrument
1.0 A Low Noise QCL Instrument
1.5 A Low Noise QCL Instrument
2.0 A Low Noise QCL Instrument
Noise Characterization Scan
SMA-BNC Cable
USB Cable
Shielded SMA-SMA Cable
Resistive Test Load for QCL500 or
QCL1000
Resistive Test Load for QCL1500
Resistive Test Load for QCL2000
19" Single Unit Rack Mount Kit
19" Double Unit Rack Mount Kit
Interlock Replacement Kit with
BNC terminator and modifi ed
D-SUB connector to override
interlocks
© April 2015
1

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  • Page 1 USER GUIDE Low-Noise QCL Driver — Laboratory Series ORDERING INFORMATION TABLE OF CONTENTS PAGE GENERAL OVERVIEW PART NO DESCRIPTION SAFETY QCL500 LAB 500 mA Low Noise QCL Instrument QCL1000 LAB 1.0 A Low Noise QCL Instrument QUICK CONNECT GUIDE QCL1500 LAB 1.5 A Low Noise QCL Instrument...

  • Page 2: General Overview

    GENERAL OVERVIEW THE LOWEST-NOISE DRIVER • Output currents of 500 mA, 1 A, 1.5 A, 2 A AVAILABLE • Low noise: <0.4 μA RMS up to 100 kHz (QCL500, typical) These low noise QCL instruments have the lowest current noise density of any commercially available. Powering your •...

  • Page 3: Safety

    SAFETY DEFINITIONS FUSES • Disconnect the power to the QCL instrument before changing the fuses. CHASSIS GROUND Symbol • To prevent damage to the QCL instrument when replacing fuses, locate and correct the problem that caused the fuse CAUTION: A condition that has the potential to to blow before re-applying power.

  • Page 4: Quick Connect Guide

    QUICK CONNECT GUIDE INSTALL FUSE & SELECT VOLTAGE WIRE A TEST LOAD Use of a test load is recommended for setup of the QCL instrument. Use the Wavelength test loads listed on page 1, or when building your own test load, a 10 Ω resistor with a 50 W power rating is recommended for the QCL500, QCL1000, and QCL1500.
  • Page 5 SETUP INTERLOCKS ENABLE CURRENT The Wavelength Interlock Replacement Kit includes a male Press the ENABLE button. There is a standard 2-second D-SUB with the passive interlock pins shorted and a BNC delay before the button illuminates and the current fl ows. terminator.

  • Page 6: Pin Descriptions

    PIN DESCRIPTIONS QCL D-SUB Pin 9 QCL + or SMA Outer Ring Figure 4. Female 9-Pin D-SUB Pin 5 QCL - Table 1. QCL D-SUB Pin-Out or SMA Center Pin DESCRIPTION QCL Driver 1, 2 Passive interlock pins (must be shorted to enable Current Sink current) Chassis ground...

  • Page 7: Electrical Specifications

    ELECTRICAL SPECIFICATIONS DRIVER OUTPUT CURRENT UNITS NOTES Output Current 0.5, 1.0, 1.5, or 2.0 μA RMS RMS Noise Current QCL1000 at 500 mA output, 100 kHz test bandwidth nA / √Hz QCL1000 at 500 mA, 10 Ω test load Noise Current Density Stability, short and long term 25°C ambient Temperature Coeffi...
  • Page 8 POWER SUPPLY VALUE NOTES REQUIREMENTS AC Power Supply and Line Switch selectable: 100-120 V and 220-240 V, 100-120 / 220-240 VAC, 2 A, 50-60 Hz Frequency appropriate power cord supplied Fuse for 220-240 V 0.63 A, 250 V, fast blow 5 x 20 mm, Part #0217.630MXP, Littelfuse Fuse for 100-120 V 1.25 A, 250 V, fast blow...

  • Page 9: Theory Of Operation

    OPERATING INSTRUCTIONS (STAND-ALONE) WHAT’S IN THE BOX These instructions are for operating the QCL Laboratory • QCL Instrument Series instrument. Fuses are provided but not installed. After • Power Cable, type appropriate for fi nal location installing the fuses in the fuse box, be sure to install the fuse •...
  • Page 10 REAR PANEL FUSE ~250V, 1.25AF (5 x 20mm) SERIAL # 100-120 VAC, 1.25 A, 50-60 Hz CAUTION: WARNING: Before powering on ETHERNET No user serviceable parts. Do device, verify voltage setting is not remove cover. correct and proper fuses are installed.
  • Page 11 INSTALL FUSES AND SELECT CONNECT POWER PROPER VOLTAGE Insert the female end of the IEC AC power cord into the Power receptacle on the back panel and then plug the male end into the power source. WIRE A TEST LOAD Use of a test load is recommended for setup of the QCL instrument.
  • Page 12 SET UP INTERLOCKS TEXT AND ICON COLOR KEY The Wavelength Interlock Replacement Kit includes a male TEXT D-SUB with the passive interlock pins shorted and a BNC terminator. Text indicates current state. 1. For the passive interlock, on the back panel, short PIN 1 White, Green Uneditable fi...
  • Page 13 TURN ON QCL INSTRUMENT ADJUST THE SETPOINT 1. Press the Power switch on the back panel to |. The front panel power button light slowly pulses. 1. Press to access the Control Screen. 2. Press the Power button on the front panel, the button illuminates, touchscreen is activated, and the Control 2.
  • Page 14 ENABLE THE QCL INSTRUMENT NOTES: • The step interval time is approximate. In the scan fi les, Press the Enable button on the front panel. The button will time intervals are slightly more than the step interval glow blue only when current is delivered to the load. There is indicated on the instrument.

  • Page 15: External Modulation Transfer Functions

    Under Recall Settings from, press the EXTERNAL MODULATION blue text to toggle through the saved Profi le (EXT MOD) BNC options, and then press the Recall icon to recall the saved settings. Select Factory to This is the external modulation input. The voltage input on restore the settings to the factory defaults.
  • Page 16 ADDITIONAL CAPABILITIES ANALOG CURRENT MONITOR This signal is the sum of the DC setpoint as shown on the screen and the external modulation input. To monitor the analog current level: 1. Connect the Analog output Current Monitor (PIN 8) on the MONITOR D-SUB to an oscilloscope.

  • Page 17: Operating Instructions (Remote)

    2. On the Wavelength website, download the ZIP fi le that is Open Instrument. specifi c to your QCL Laboratory Series model and save 3. In the Choose Instrument To Open window, select the the update fi le to a fl ash drive.
  • Page 18 Figure 20. Include USB Devices window Figure 22. Remote Computer Control screen NOTES: • The Include USB Devices checkbox is selected by default and any powered instruments currently connected to the computer via a USB cable appear in the list. •...
  • Page 19 SUPER USER VS. NORMAL USER EDIT INSTRUMENT PROFILES PERMISSIONS Profi les can be edited in Super User mode or when Normal Users are not restricted from saving profi les. There are two levels of permissions when modifying the instrument controls, Super User and Normal User. 1.
  • Page 20 EDIT ADVANCED OPTIONS CHANGE SUPER USER PASSWORD Advanced Options can only be edited in Super User mode. 1. On the Instrument Operation tab, click Super User. 2. Type the password in the text box and click OK. Select the Show Password checkbox to type the password as text.
  • Page 21 CHANGE VALUES ON INSTRUMENT RUN A VI SCAN Blue and yellow text denotes editable values, green and white 1. On the Instrument Operation tab, click the green arrow. text is not. Press TAB to move to the next editable fi eld. A Specify Data File window opens.

  • Page 22: Troubleshooting

    TROUBLESHOOTING Table 5. Troubleshooting PROBLEM POTENTIAL CAUSES SOLUTIONS The front panel Power button has a 3 second delay between when it is turned off and on in The button has been pushed on and rapid succession. This is a safety mechanism off within 3 seconds.
  • Page 23 PROBLEM POTENTIAL CAUSES SOLUTIONS Refer to Wavelength Electronics Application Note AN-LD08: “Manage Grounding to Minimize Noise with the QCL Drivers”: There may be ground loops in the http://www.teamwavelength.com/downloads/ http://www.teamwavelength.com/downloads/ system; some system components notes/an-ld08.pdf notes/an-ld08.pdf Noise current is higher than expected.
  • Page 24 Table 6. Error Messages To clear error text, fi x the cause then press any icon or the Enable button. ERROR POTENTIAL CAUSES SOLUTION The USB fl ash drive is missing or not To run a local VI scan, a USB fl ash drive Insert a USB fl...

  • Page 25: Additional Technical Notes

    ADDITIONAL TECHNICAL NOTES This section includes useful technical information on these SOFT-CLAMP CURRENT LIMIT topics: The QCL driver employs a soft-clamping current limit that • Reduce internal temperature or provide compliance begins to act at a current lower than the calculated absolute voltage limit current limit.
  • Page 26 SQUARE WAVE RESPONSE Figure 34 and Figure 35 illustrate the modulation response of the QCL1500 driven at 1.15 A into a 10 Ω test load. Figure 34. 10 kHz Output Plot QCL1500 at 1.15 A with 10 Ω Test Load Figure 35.

  • Page 27: Mechanical Specifications

    MECHANICAL SPECIFICATIONS 8.860 [225.0] 3.47 [88.14] 16.35 [415] 8.860 8.49 [225.0] [215.6] 17.72 [450] 0.66 0.72 16.35 [16.8] [3.89] [415] 3.47 [88.14] 3.92 [99.6] 6.10 Dimensions are in inches [mm]. [154.9] Tolerance is ±5%.

  • Page 28: Ce Declaration Of Conformity

    2000 mA QCL Driver Laboratory Instrument DECLARATION The undersigned hereby declares, on behalf of Wavelength Electronics, Inc. (Wavelength) of Bozeman, Montana, that the products listed in the table above, to which this Declaration applies, are in conformity with the provisions of: APPLICABLE REGULATIONS •...

  • Page 29: Warranty & Certification

    WARRANTY & CERTIFICATION CERTIFICATION Wavelength Electronics, Inc. (Wavelength) certifi es that this product LIFE SUPPORT POLICY met its published specifi cations at the time of shipment. Wavelength This important safety information applies to all Wavelength electrical further certifi es that its calibration measurements are traceable to...

This manual is also suitable for:

Qcl1000 labQcl500 labQcl1500 labQcl2000 lab

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