MODEL 2200 SCALER/RATEMETER

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Combine with a well counter or probe, specific to your application

  • Ratemeter with total range of 0 – 500,000 cpm
  • Single-channel analyzer with 6-digit LED display
  • Power either by wall current or four D-cell batteries
  • RS-232 serial port and software for computer/printer interface
  • Optional:
    - Well Counter
    - Low Energy Gamma Scintillation Probe
    - Lead-collimated Sample Holder

The Model 2200 Scaler/Ratemeter is designed for sample counting and single-channel analyzing when used with an appropriate detector. Two independently adjustable discriminators allow the user to set an “energy window” to count pulses within a user-specified energy range  corresponding to the radionuclide of interest. This portable unit can be powered by wall current or by four D-cell batteries. When equipped with
the optional Well Counter (187-243), the unit serves as a reliable and efficient tool for wipe test counting, Schilling tests, and other procedures involving radiopharmaceuticals or ionizing radiation. The Well Counter’s 4pi geometry provides high sensitivity to isotopes such as I-131. The Scaler/Ratemeter can be set up with optional Low Energy Gamma Scintillation Probe (051-443) and lead-collimated Sample Holder (075-
550) as a more moderately priced alternative for conducting wipe tests and general contamination surveys. The Model 2200 has an RS-232 serial port for connection to a computer or printer for logging and output of count data. Windows®- based software is also included so that a PC can be used to control count time, date-stamp records, print hard copy, or save data to disk files.

SPECIFICATIONS

Scaler/Ratemeter

  • Indicated Use: Single-channel analyzing, gross sample counting
  • Compatible Detectors: Scintillation, GM, proportional
  • Scaler: 6-digit LED display with dimmer control; Range: 0 – 999,999 counts (controlled by “COUNT” button)
  • Scaler Linearity: Reading within ±2% of true value
  • Timer: Thumb wheel adjustment from 0 – 999 minutes with selectable divisions of x0.1 and x1
  • Ratemeter: 0 – 500,000 cpm total range
  • Meter: 2.5" arc (6.4 cm), 1 mA movement, analog
  • Meter Dial: 0 – 500 cpm, 0 – 2.5 kV, Battery Test
  • Multipliers: x1, x10, x100, x1000
  • Linearity: Reading within ±10% of true value with detector connected
  • Response: Toggle switch for FAST (4 sec.) or SLOW (22 sec.) from 10% to 90% of final reading
  • Zero: Pushbutton to zero meter
  • High Voltage: Adjustable from 200 – 2500 volts (will support 60 megohm scintillation loads)
  • Threshold: Voltage sensitive, adjustable from 1.00 – 10.00
  • Window: Adjustable from 0 – 10.0 above the threshold setting (can be enabled or disabled)
  • Discriminator: Adjustable from 2 – 100 mV at threshold setting of 1.00
  • RS-232: 9-pin connector for printer or software interface
  • Detector Cable Connector: Series “C”
  • Power: 115 VAC; 220 VAC or battery power
  • Battery Life: Typically 120 hours with alkaline batteries (battery check on meter)
  • Housing: Aluminum, beige polyurethane enamel paint
  • Dimensions: 8.5" h x 5" w x 9.3" depth (21.6 x 12.7 x 23.5 cm)
  • Weight: 6.9 lb (3.1 kg) without batteries

187-243 Well Counter

  • Dimensions: 8" w x 8" depth x 11.75" h (20 x 20 x 30 cm)
  • Well: .625" dia x 1.4" h (2 x 4 cm)
  • Lead Shielding: 1" thick (2.5 cm)
  • Construction: Monoline
  • Weight: 30 lb (14 kg)

051-443 Low Energy Gamma Scintillation Probe

  • Indicated Use: I-125 and X-ray survey
  • Energy Response: Energy dependent
  • Operating Voltage: Typically 500-1200 volts
  • Scintillator: 1" diameter (2.5 cm), 1 mm thick NaI(Tl) crystal
  • Entry Window: 15 mg/cm²
  • Window Area: 5 cm² active and open
  • Background (10µR/hr): Typically 350 cpm
  • Efficiency (4pi): 19% for I-125
  • Sensitivity: 675 cpm/µR/hr (I-125)
  • Recommended Energy Range: 10-60 keV
  • Tube: 1.5" dia (3.8 cm) magnetically shielded multiplier
  • Dynode String Resistance: 100 megohm
  • Cable: 39" l (99 cm), type “C” connectors
  • Dimensions: 2" dia x 7" l (5.1 x 17.8 cm)
  • Weight: 1 lb (0.5 kg)

075-550 Sample Holder

  • Indicated Use: Repeatable geometry counting of wipes, filter paper, slides Maximum Sample Size: 1.85" (4.7 cm) diameter
  • Sample Tray Positioning: Slots provide selectable tray-to-detector distance at 0.125" (0.32 cm), 0.25" (0.64 cm), 0.5" (1.3 cm), 1" (2.5 cm), 2" (5.1 cm)
  • Construction: 0.25" lead collimator with aluminum frame and sample tray
  • Dimensions: 3.8" l x 3.3" w x 5.5" h (9.7 x 8.4 x 13.9 cm)
  • Weight: 3 lb (1.4 kg)

051-220 Scaler/Ratemeter, Model 2200, 115 VAC
051-222 Scaler/Ratemeter, Model 2200, 230 VAC

Related:

187-243 Well Counter, 1" Lead
051-443 Probe, Gamma Scintillator, Low Energy
075-550 Sample Holder

Replacement:

066-350 Battery, “D” Cell