The Victoreen 500 high-precision, MOS-FET, dual polarity electrometer permits the optimum use of many commercially-available ion chambers with coaxial or triaxial terminations. It accepts triaxial BNC and coaxial UHF connectors. PET, MICRO-DOT and TNC adaptors are available. The instrument's innovative design permits these chambers to be connected with the chamber bias potential placgd automatically and correctly . . . without potential dangerous shock hazards. In addition, the instrument assures compliance with modern dosimetry protocols requiring precision, polarity reversal and saturation studies. Electron beam dosimetry and other special studies are facilitated through the use of the reversed chamber bias switch, 40% normal bias switch and alternate bias connector. The reverse bias switch allows immediate reversal of the chamber bias which is displayed on the front panel. The 40% normal bias switch facilitates saturation studies and is spring loaded to prevent accidental operation at the lower potential.

Features:

• 4 1/2 digit display allows 0.005% full-scale resolution.

• Accepts probes of nearly every design.

• Measures charge and current of either polarity.

• Reversible ion collection potential for electron beam dosimetry.

• Available in SI units

Specifications:

• Display: 4-1/2 digit LED readout.

• Precision: Within 0 .01 % full scale.

• Linearity: Within 0 .01 % full scale .

• Accuracy: Within 0 .5% full scale for charge (nC) or current (pa) measurements.

• Circuitry: All solid state with MOSFET input operational amplifier,

• Input Impedance: Greater than 10¹⁴ ohms.

• Input Offset Current: Less than 3 x 10^-15 SSA for relative humidity less than 80%.

• Amplifier Gain: Greater than 10⁵.

• Decay Time Constant of Integration Capacitor: Greater than 2 x 10⁶ seconds .

• Rate Response Time: 2.3 seconds for readings 0 to 90% .

• Over-Range: Indicated by flashing display .

• Zero Adjust: Adjusts input offset voltage to ±0.04mV.

• Operating Temperature Range: 10°C to 40°C.

• Storage Temperature Range: -20°C to 60°C.

• Operating Humidity Range: 0 to 80% relative humidity (nonvolume condensing) .

• Long-Term Stability: Within 0.5% full scale per year.

• Temperature Stability: Within 0.03% per °C.

• Power Requirements: 10 watts, 50 or 60 Hz, 100-130V, 200.260V, selected internally .

• Input Power Dependence: Within 0.02% per 10% power change.

Please contact us for more information on the Victoreen 500