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.

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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