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Machine QA Patient QA Diagnostic Health Physics

MAX 4000 Plus Electrometer

MAX 4000 Plus Electrometer Overview

Powerful Measurement Capabilities

  • Updated timed charge collections for various increments.
  • Three collection modes: triggered with automatic start/ stop, timed from 0-600 seconds, and continuous.

Compatible with Standard Imaging Software

Use included MAX COMM Software or DV1D Software to:

  • Automatic acquisition of a series of timed charge collections.
  • Perform basic beam profiling with continuous collection of rate measurement points over user defined intervals.
  • Export data in a Microsoft® Excel compatible format.
  • With MAX COMM Software, facilitate calculation of integrated dose and dose rate in Gy, Sv, R, Gy/min, Sv/hr, R/min, or Gym2/hr

External Beam, Stereotactic QA and More

  • Quick measurements of small volume ion chambers, such as those used in IMRT or SBRT.
  • Ideal for ion chambers typically used for data acquisition in water phantoms.
  • Great for mammographic, conventional radiology, and CT scanning applications, as well as health physics measurements.

Simple, Intuitive Interface

  • Simplified LCD display produces easy-to-read data.
  • Faster warm-up time from start up to acquisition.
  • Simultaneous display of amp, coulomb, and collection time minimizes the need to switch screens.
  • User activated, automatic zeroing function.

Superior Bias Settings

  • Compatible with large volume ionization chambers.
  • Additional bias levels for accurate determination of chamber correction factors.
  • Extended ± 0-450 VDC for TG-51 and 1/3 ratio IAEA TRS-398 measurements.

Reference Class Confidence

Designed to meet or exceed AAPM, ADCL, IEC 60731 reference grade instrument specification requirements.

LDR or HDR Brachytherapy

  • Exceptional sensitivity with quick measurements of low activity isotopes.
  • 0.27 mCi iodine seed, measured in the HDR 1000 Plus Well Chamber, gives a typical signal of 1.458 pA.
  • Measures 10 Ci and higher iridium sources.

  • REF Number
    90020
  • Height
    7.9 cm (3.1 in)
  • Width
    22.6 cm (8.9 in)
  • Length
    24.8 cm (9.8 in)
  • Weight
    1.7 kg (3.80 lbs)

Display Range

  • RATE:
    Low Range 0.001 pA – 1000.00 pA, 1 fA resolution
  • High Range 0.001 nA – 500.00 nA, 1 pA resolution
  • CHARGE:
    Low Range 0.01 pC – 999,999 nC, 10 fC resolution
  • High Range 0.01 nC – 999,999 nC, 10 pC resolution

Charge Collections

  • TRIGGER:
    Automatic start, stop, and reset based on user defined thresholds (Start: 0.02 – 9.9 pA; Stop: 0.01 – 9.8 pA)
  • TIMED:
    User set duration options will increase 1-10 (1sec increments) 15-120 (15sec increments); 120-600 (60sec increments)
  • CONTINUOUS:
    Unlimited duration with manual stop

  • Range Switching
    User selectable
  • Repeatability
    ± 0.1% (IEC 60731 requirement: ± 0.5%)
  • Long-Term Stability
    0.5% (over one year)
  • Stabilization Time
    ± 0.5% (IEC 60731 requirement: ± 0.5% of value at 1 hr for measurements taken at 15 min and 6 hrs)
  • Response Time
    High Range Rate: 3 s
  • Low Range Rate: 15 s All Ranges Charge: < 0.5 s
  • Non-Linearity
    ± 0.2% (IEC 60731 requirement: ± 1.0%)
  • Conformity
    CE
  • Reference class according to IEC 60731
  • Zero Drift
    High Range: < ± 0.1%
  • Low Range: < ± 0.25% IEC 60731 requirement: ± 0.5%
  • Zero Shift
    High Range: < ± 0.1%
  • Low Range: < ± 0.25% IEC 60731 requirement: ± 0.5%
  • Display
    Backlit LCD, 2 x 20 with 5/16" characters
  • Input
    BNC two lug, triaxial connector

Bias Voltage

  • Nominally ±450 volt bias
  • -450 to -100, 0, 100 to 450 (Ranges in 50 Volt Increments)
  • ACCURACY:
    ± 0.3 volt

  • Zeroing
    Automatic zero function, user activated
  • Output
    Isolated RS-232; bidirectional 19,200 baud rate; 8 data bits; no parity; 1 stop bit; compatible with Argus QC4 software
  • Power
    100-240 VAC, 0.5 A max, 50/60 Hz input to external power supply, 9 VDC, 1.7 A power supply output to electrometer input, UL/TUL listed power supply; internal, user replaceable battery: 8 hrs per charge

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