DLS100 Stimulus Isolator www.wpiinc.com For use with DS8000 Digital Stimulator INSTRUCTION MANUAL Serial No._____________________ 121009 CAUTION: DS8000 must be powered off before DLS100 is attached.
DLS100 Contents About this Manual....................................................................................................................... 1 Introduction................................................................................................................................... 2 Notes and Warnings..................................................................................................................... 2 General Notes...........................................................
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DLS100 About this Manual The following symbols are used in this guide: This symbol indicates a CAUTION. Cautions warn against actions that can cause damage to equipment. Please read these carefully. This symbol indicates a WARNING. Warnings alert you to actions that can cause personal injury or pose a physical threat. Please read these carefully. NOTES and TIPS contain helpful information. Fig.
Introduction The DLS100 is a biological linear stimulus isolator designed to operate exclusively with the DS8000 8-Channel Digital Stimulator. In addition to receiving signal information from the DS8000, the DLS100 is also powered by the DS8000. Up to eight DLS100 isolators may be connected to a single DS8000. A high degree of signal precision is maintained by taking the signal information from the DS8000 in digital form.
DLS100 Parts List After unpacking, verify that there is no visible damage to the instrument.
Instrument Description Instrument Description Front Control Panel The DLS100 control panel is shown Fig. 2. Output Connection Output Button Activity LED Alarm LED Constant Current Controls Constant Voltage Controls Range LEDs Range Buttons Power LED Fig. 2–DLS100 front panel Range Buttons and Range LEDs–Select the operating range by pressing one of the range buttons. They are marked according to the full-scale current or voltage available.
DLS100 current or voltage corresponds directly to the polarity of the output signal from the DS8000. Power LED–The Power LED indicator illuminates when the DLS100 is connected to a DS8000 and the DS8000 is powered on. Activity LED–The Activity LED indicator illuminates whenever a digital signal is received from the DS8000. Alarm LED– The Alarm LED indicator illuminates whenever the DLS100 is in constant current mode and unable to deliver the requested current.
Back Panel Even Channel Adjustment (POT1) Odd Channel Adjustment (POT2) Audible Alarm Switch Fig. 5–Back panel of the DLS100 Three small black plugs cover access holes for DC adjustment offsets and an audible alarm enable switch. Setup Connecting to DS8000 CAUTION: DS8000 MUST be powered off before attaching the DLS100.
DLS100 Operating Instructions The DLS100 connects with the DS8000 using a single cable that connects to any of the channel output connectors on the back of the DS8000. The DLS100 reproduces the waveform that is programmed on the DS8000. The DLS100 sources its signals from the combined analog matrix on the DS8000. DLS100 Output The DLS100 is a continually variable (linear) isolator, which means that the output current or voltage is proportional to the amplitude of the input signal.
Quick Functional Check To demonstrate the DLS100 and DS8000 are working as desired, complete the following exercise. CAUTION: DS8000 MUST be powered off before attaching the DLS100. 1. Connect the DLS100 to any channel on the DS8000. 2. Connect the 10KW “Dummy Load,” included in the Accessory Kit, to the DLS100 output. 3. Connect an oscilloscope to the dummy load resistor. NOTE: The ground lead of the oscilloscope probe MUST connect to the “–” output of the DLS100. 4. Turn power on to the DS8000.
DLS100 Adjusting the DC Offset The DLS100 DC offset must be adjusted for both the even and odd channels. Adjust the even channels first, because they are subject to the adjustment of the odd channels. This calibration involves two potentiometers. POT1 is for even channels on the DS8000, and POT2 is for odd channels. CAUTION: DS8000 MUST be powered off before attaching the DLS100. 1. Connect the DLS100 to the DS8000 channel 2 output (9-pin connection). 2. Power on the DS8000. 3.
9. Using the provided adjustment tool (WPI #610023), carefully adjust POT1 until the meter reads 0.00mV ±1mV. 10. Turn off the DS8000 and connect the DLS100 to the DS8000 channel 1 output (9-pin connection). 11. Power on the DS8000 and bring up the channel 1 menu. Verify that channel 1 is set to Run and the Output is on. The output must be set to 0.00 amplitude. 12. With a digital volt meter set in the millivolt scale, monitor the output voltage of the load resistor. 13.
DLS100 Troubleshooting Non-compliance alarm sounding No signal output (activity light off) DLS has no power Issue Possible Cause Solution Poor cable connection Check connections between the DS8000 and the DLS100. If necessary, reseat the cable in the socket. Bent pin on 9-pin connector on the DLS100 cable Examine the 9-pin connector. Carefully straighten any bent pins. If any pin is missing, replace the cable (WPI #83016).
Specifications The DLS100 conforms to the following specifications: Current Source Mode Full-scale* Current 10mA, 1mA, 100µA, 10µA, 1µA, bipolar Compliance Voltage ± 100V Output Impedance Greater than 100MW Linearity Better than 0.05% of full-scale range setting A/C Noise Floor Range Value 10mA ≥1µA 1mA ≥0.5µA 100µA ≥0.3µA 10µA ≥0.3µA 1µA ≥0.3µA Voltage Source Mode Full-scale* Voltage ± 100V Maximum Current 10mA Output Impedance Less than 1W Linearity Better than 0.
DLS100 Index Symbols 2033 3 2034 3 3142 3 83016 3, 6 83017 3 A accessories 10 alarm 10 audible alarm 5, 10 P parts list 2 R range buttons 4 returns 3 S signal waveforms 8 sine wave 8 sockets 6 specifications 12 B banana 5 banana sockets 6 batteries 2 bio-amplifier 2 T troubleshooting 11 C cable 6 coaxial cable 6 combined analog matrix 7 connectors 6 control panel 4, 7 V virtual channels 7 U unpacking 3 D DC adjustment offsets 6 DC offset 9 Digital-to-Analog converter 2 F functional check 8 I input c
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DLS100 Warranty WPI (World Precision Instruments, Inc.) warrants to the original purchaser that this equipment, including its components and parts, shall be free from defects in material and workmanship for a period of one year* from the date of receipt. WPI’s obligation under this warranty shall be limited to repair or replacement, at WPI’s option, of the equipment or defective components or parts upon receipt thereof f.o.b. WPI, Sarasota, Florida U.S.A. Return of a repaired instrument shall be f.o.b.
World Precision Instruments, Inc. USA International Trade Center, 175 Sarasota Center Blvd., Sarasota FL 34240-9258 Tel: 941-371-1003 • Fax: 941-377-5428 • E-mail: sales@wpiinc.com UK Astonbury Farm Business Centre • Aston, Stevenage, Hertfordshire SG2 7EG Tel: 01438-880025 • Fax: 01438-880026 • E-mail: wpiuk@wpi-europe.com Germany Zossener Str. 55, 10961 Berlin Tel: 030-6188845 • Fax: 030-6188670 • E-mail: wpide@wpi-europe.com Japan Physio-Tech Co., Ltd.
