Model 3030 & 3030E Series Technical Manual Section 3
Ludlum Measurements, Inc. Page 7 November 2017
Weight: 2.7 kg (6 lb)
Finish: beige powder coating with subsurface-printed membrane front panel
Input Sensitivity: Beta-gamma lower threshold is adjustable from 2 mV to
10 mV. Beta-gamma upper threshold is adjustable from 25 mV to 100 mV.
Alpha threshold is adjustable from 150 mV to 500 mV. Normally the beta
channel is set for input pulses from 4 mV to 50 mV, and the alpha channel
is set for input pulses above 120 mV.
Beta Threshold: -4 mV
Alpha Threshold: -120 mV
Beta Window: 50 mV
High Voltage (HV): manually or digitally adjustable from 200 to 2500 Vdc
with the capability of supporting 60-megohm scintillation loads to 1500 volts
Audio: dual tone (one for each channel), “click-per-event” type with volume
control
Data Output: 9-pin RS-232 port
Status Indicators: backlit indicators for QC-daily QC check needed; OL-
scintillation detector is in overload condition; CPM/DPM- counting in CPM or
DPM mode; αAL/βAL-count has exceeded the alarm set point
Count Time: Select 0.1, 0.5, 1, 2, 5, 10, 60 minutes or the user-defined PC
setting, which is defined during setup using the RS-232 port. User-defined
count time may be set from 0.1 to 546.1 minutes.
Scalers: two each (one per channel), six-digit LCD displays with backlights
providing a range of 0-999999 counts (started by the COUNT button)
Scaler Linearity: reading within 2% of true value
Count Timer: adjustable from 0.1 to 30 minutes (PC setting is user-defined
via PC software)
Power: 250 watts at 95-250 Vac, 50-60 Hz single phase; internal 12 Vdc,
1.2A/hr, trickle-charged battery provides power for eight hours
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