MAX 4000 Plus
Electrometer

One of the most widely used electrometers; the MAX 4000 Plus is a versatile, reference-grade tool ideal for a spectrum of radiation therapy applications.

New Look, Same Accurate Measurements

The MAX 4000 Plus overall design and display has been redesigned for easier set-up and a clearer output of measurements and data.

Low Noise, Repeatable Measurements

Exceptional 0.001 pA to 500.00 nA range, 0.01 pC to 999,999 nC range.
0.1% repeatability and exceptionally low leakage of less than 1 fA.
Digital filter eliminates nearly all the effects of noise, resulting in stable, exact measurements.

Powerful Data Management

MAX COMM™ software allows for comprehensive control of dose and dose-rate measurements, chamber detectors, remote operations and data logging.

Specifications

MAX 4000 Plus Electrometer
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 - High or Low
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 93/42/EEC
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

5 USER BIAS SETTINGS:
-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
Product Standards CE 93/42/EEC

Support

Product Resources

Publications, tech notes, testimonials, and other resources to support MAX 4000 Plus Electrometer.

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Publications

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Tech Notes

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