EHT NSP Series User Manual Download Page 5 | Manualshive

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EHT NSP Series User Manual Download Page 5

P:

206.402.5241

E:

[email protected] | 169 Western Ave W, Seattle, WA 98119 | www.eagleharbortech.com

Page 5 of 32

1

Warranty

EHT warrants that all EHT Electronics Ltd. manufactured equipment will be free of any defect in
materials or workmanship for the period of (1) year. The warranty is extended to customers and applies to
all EHT manufactured equipment purchased, installed, and used for the purpose for which such
equipment was originally designed. The above warranties cover only defects arising under normal use and
do not include malfunctions or failures resulting from misuse, abuse, neglect, alteration, problems with
electrical power, usage not in accordance with product instructions, acts of nature, or improper
installation or repairs made by anyone other than EHT.

2

Patents

The Nanosecond Pulser product line is protected by one or more patents issued in the United States, and
covered by one or more patent applications pending in the United States and elsewhere. A listing of these
patents can be found at

http://www.eagleharbortech.com/patents

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Summary of Contents for NSP Series

Page 1: ......

Page 2: ...nt knowledge of the dangers and hazards of working with high voltage Do not attempt to approach or touch any internal or external circuits or components that are connected or have been connected to th...

Page 3: ...minimized In general this involves keeping the HV output leads and load far from all grounded surfaces cables and other equipment A 2 minimum clearance between the high voltage output and other compo...

Page 4: ...ions 16 6 1 Turning on the NSP 16 6 2 Turning off the NSP 16 6 3 Adjusting Output Voltage 16 6 4 Free running Mode Operation 17 6 5 Triggered Mode Operation 17 6 6 External Mode Operation Optional 18...

Page 5: ...t was originally designed The above warranties cover only defects arising under normal use and do not include malfunctions or failures resulting from misuse abuse neglect alteration problems with elec...

Page 6: ...using the floating configuration whenever possible However the floating output units may not be used with a grounded load In applications where the load is grounded the grounded output version of the...

Page 7: ...s pulse width units Model Voltage kV Max Pulse Repetition Frequency kHz Rise Time ns Pulse Width ns Output Impedance NSP 120 5 5 10 20 40 500 300 NSP 120 10 10 10 20 40 500 600 NSP 120 20 20 10 20 40...

Page 8: ...ating space The minimum pulse width is measured at maximum output voltage defined as the full width at half maximum FWHM Shorter pulses are possible at voltages below the NSP s maximum output voltage...

Page 9: ...fo eagleharbortech com 169 Western Ave W Seattle WA 98119 www eagleharbortech com Page 9 of 32 Figure 3 Available Operating Space for the NSP 120 20 P 500 L Figure 4 Available Operating Space for the...

Page 10: ...ore they can be charged again They also protect the NSP in the event that the load is left open or shorted The function of the series resistor is to limit the maximum output current which protects the...

Page 11: ...Figure 6 The effective output impedance of the NSP is RS Note that if your NSP was purchased prior to 2019 please contact the manufacturer for values Pulser Model RS RP NSP 120 5 P N 500 L 71 5 k NSP...

Page 12: ...ode Switch Switch to toggle between Internal and External Mode The LED corresponding to the selected mode will be illuminated green 6 Single Pulse Button If the Base Pulse Repetition Frequency Knob is...

Page 13: ...Control This dial allows the user to adjust the output voltage in fine increments 13 External Trigger Input Optional When the Mode Switch is set to External Mode both the pulse width and repetition f...

Page 14: ...supply 2 HV output cables one red and one black 3 Standard AC power cord for the NSP 4 User s manual If the user ordered the option to control the NSP remotely also find inside 5 FT 1 6 Fiber optic c...

Page 15: ...5 To connect the load cables to the NSP a Loosen the two setscrews located on top of the black plastic block on the back of the NSP b The positive cable is marked in red and the negative cable is mar...

Page 16: ...off the NSP The NSP should be turned off and the capacitive load returned to a safe state following use 1 Set HV Output Switch to the Disable position Standard HV safety protocol would also dictate se...

Page 17: ...cy can be adjusted with the Pulse Repetition Frequency Base Control and Pulse Repetition Frequency Multiplier Control The output pulse repetition frequency is the product of the base pulse repetition...

Page 18: ...External Mode also allows the pulse width to be controlled remotely This can be useful if the user has a system which requires pulse width modulation or otherwise wants to control the pulse width rem...

Page 19: ...m 169 Western Ave W Seattle WA 98119 www eagleharbortech com Page 19 of 32 Figure 9 Input pulse width vs output pulse width for NSP 120 20 F 0 50 100 150 200 250 0 50 100 150 200 250 300 External Cont...

Page 20: ...upply is unplugged as doing so could damage the internal electronics of the FT 1 The fiber optic output uses standard 2 2 mm jacketed plastic fiber The fiber should be cut to length with a sharp razor...

Page 21: ...dicator illuminates but the fan does not turn on Solution Cease operation and contact Eagle Harbor Technologies immediately Operation of the unit without the cooling fan may result in catastrophic sys...

Page 22: ...tage trace then the voltage is not high enough to break down the DBD Arc at the current settings Increase the supply output voltage 8 2 Internal Mode Problem The rear panel AC Switch is in the On I po...

Page 23: ...is is the minimum pulse width achievable by the unit and internal protections have limited the output pulse to the value measured Problem The rear panel AC Switch in the On I position and the front pa...

Page 24: ...s This includes the trigger level of the scope which should be set to a level low enough such that the oscilloscope is triggered by the shot In estimating this level take into account the voltage divi...

Page 25: ...his mode every 0 5 seconds but was not detected when set to Single Pulse contact Eagle Harbor Technologies 11 If no output pulse is detected turn the HV Output Switch to Off then turn the rear panel A...

Page 26: ...DP0100 High Voltage Differential Probe or Tektronix P6015A High Voltage Probe Oscilloscope traces showing typical output waveforms of the NSP are shown below 9 1 Internal Voltage Divider Waveforms In...

Page 27: ...Divider Waveforms The user can measure the full voltage output using a capacitive voltage divider The waveform below shows that measuring the output voltage with a capacitive voltage divider with a sm...

Page 28: ...t monitor The DBD had a capacitance of 8 pF The current profile green shows the current flowing into the DBD as the capacitance is charged The voltage stays constant and the current near zero until th...

Page 29: ...rent is constant for the duration of the pulse Figure 17 Load voltage yellow and current green for an arc and a 1 pF voltage divider 9 5 NSP 120 30 N 500 Output Waveforms Waveforms specific to this un...

Page 30: ...nt purple for minimum left and maximum pulse widths across a 10 pF 1 9 capacitive voltage divider Figure 21 Maximum pulse width on a shorted output demonstrating the maximum dI dt and current for the...

Page 31: ...ltage and with 6 output cables unless otherwise specified This unit has recently undergone a redesign and these waveforms are no longer accurate Figure 22 Minimum left and maximum pulse width voltage...

Page 32: ...169 Western Ave W Seattle WA 98119 www eagleharbortech com Page 32 of 32 Figure 25 Maximum pulse width on a shorted output demonstrating the maximum dI dt and current for the unit 1 2 A ns up to a fla...

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