Environmental Restoration Group

Ludlum Model 2000
Ludlum Product Description
The Model 2000 is a general purpose scaler typically used for counting samples. It's rugged design and construction facilitates both benchtop and portable applications with its wide ranging AC power supply and internal batteries capable of powering the instrument upwards of 120 hours. The Model 2000 supports GM, proportional and scintillator type detectors and provides fine adjustment controls for setting the high voltage and threshold settings. The scaler reading is presented on a digital, 6 digit readout LED that can be set to count from 0.1 to 999 minutes via a front panel dip switch. An internal switch facilitates counting in seconds rather than minutes if desired. Other front panel controls include a start count button, a HV/Bat switch for displaying the current value on the accompanying analog meter and a three way switch for selecting power off, battery or line power. An RS-232 port on the rear panel allows connection to a PC or printer as set by a rear mounted switch.

INDICATED USE: Gross counting
SUGGESTED DETECTORS: GM; scintillation; proportional
CONNECTOR: Series C (others available)
SCALER: 6 digit LED display with a range of 0 - 999999 counts
SCALER LINEARITY: Reading within 2% of true value
TIMER: Pushwheel adjustment from 0 - 999 minutes with selectable X0.1 and X1 multipliers
METER DIAL: 0 - 2.5 kV
METER: 2.5(6.4 cm) arc, 1 mA analog type
HIGH VOLTAGE: Adjustable from 200-2500 volts (will support 60 megohm scintillation loads)
THRESHOLD: Adjustable from 1.0 - 10.0
DISCRIMINATOR: Adjustable from 2 - 100 mV
RS-232: 9 pin connector allowing for printer or computer interface
POWER: 95-250 Vac 50-60 Hz or 4 each D cell batteries (housed in externally accessible compartments)
BATTERY LIFE: Typically 120 hours with alkaline batteries (battery condition can be checked on meter)
CONSTRUCTION: Aluminum housing with beige powder coat paint
TEMPERATURE RANGE: -4 F to 122 F (-20 C to 50 C)
SIZE: 8.5 H x 5 W x 9.3 D (21.6 x 12.7 x 23.5 cm)
WEIGHT: 6.9 lbs. (3.1 kg) w/o batteries
Optional Printer Specifications
Can be setup to provide date/time stamp on each line.
POWER: comes with 120 Vac wall transformer, outputs 9 Vac
SPEED: 33 lines per minute
PAPER ROLL: standard 2.25" wide calculator paper
RIBBON LIFE: 200,000 characters
REPLACEMENT RIBBON: Epson HX-20 cartridge
SIZE: 4.05" W x 4.5" D x 2.0" H (10.3 x 11.4 x 5.1 cm)
8809 Washington St. NE Suite 150
Albuquerque, NM 87113
Tel: (505) 298-4224
Fax: (505) 797-1404