Dynalyzer – High Voltage Unit
OPERATION MANUAL
5
Filament Current
Filament current is measured in the common lead of the cathode circuit using an insulated AC/DC
open loop hall effect current transducer. The output of the transducer is amplified to a signal level
of 0.1 Volt(pp)/Ampere(pp), with a -3-dB bandwidth of 20 kHz.
Equipment Supplied
As supplied, the High Voltage Unit is shipped with the following components:
•
High Voltage Unit Assembly
•
12 ft. Coaxial Cable, BNC Connectors each end (2 each)
•
Vaporproofing Compound (2 [two] 1.5 oz. tubes)
•
Line cord (6 ft.)
•
Dummy plugs (2)
Additional equipment required for use includes:
•
Dual-trace oscilloscope to display mA and kV waveforms
Optionally, a peak holding digital voltmeter (DVM), Dynalyzer III Digital Display or Accu-
Dyn+ system
•
Two (2) 3-conductor, 5-foot long high-voltage x-ray cables, Federal Standard Connector
Specifications
Calibration Standard
Factory calibrated, all output parameters traceable to National
Bureau of Standards
Electrical Rating (maximum
peak voltages)
Anode to cathode: 150 kVp
Anode to ground: 85 kVp
Cathode to ground: 85 kVp
Current from x-ray to
Generator (max)
Anode (peak): 1 A for 1 s
Anode (continuous): 700 mA
Filament: 10 amps (ac rms)
D.C. Voltage Division Ration
10,000: 1 ±1% (10kV to 75 kV plus & minus polarity)
Voltage Divider Load
1000 megohms to ground
2000 megohms anode-cathode
Duty Cycle
Continuous
Frequency Response
Voltage: 0-1 kHz ± 2.9%
1 kHz – 100 kHz ±12.2%
Anode current: 4 kHz @ -3-dB
Filament current: 20 Hz to 20 kHz, ±1db
Filament Current Sensor
Output level: 0.1 volt per ampere (p-p)
Ratio: 0.1 volt/ampere (±5% + zero offset)
Noise level: 0.1 ampere, rms
