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SCALER
Manufacturer: Picker Nuclear (USA)
Model: Compact Scaler (Transistorized) 644-010
Cost: $450
Description
An electronic device for counting short
duration electrical impulses. The time interval of the
counting is also measured precisely. A stable, adjustable
high voltage power supply is also included to supply the
needs of Geiger-Muller tubes or scintillation detectors
which may be connected to the scaler.
Specifications
Scaler | Max. count 99,999 (1 count resolution) |
resolving time | 50 u-sec (between pulses) |
amplitude | > 25 mv or 250 mv depending on switch position. |
Timer | Max. time 999.99 min resolution 0.01 min |
Power Supply | 500-1600 V positive 500 uA max. current |
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Operating Instructions
- Connect the sensing device to the appropriate terminal
on the rear panel (Detector Input for G-MT and Scint.
Detector), and set the sensitivity switch which is
located beside it (usually 250 mV for G-MT and 25 mV
for a Scint. Det.).
- Make sure the power and HV switches are off, and
connect the unit to the 115 V 60 Hz mains.
- Turn on the power.
- Set the HV to the desired level and turn it on when
required.
- Reset both the scaler and the timer by rotating the
reset in the direction of the arrow. Reset the scaler
alone by rotating the reset in the opposite direction.
- Use the count switch to initiate and terminate
counting. Both scaler and timer hold their counts
when the switch is turned off.
Precautions
- Do not leave the counter on when not wanted for more
than a 15 minute period as the glow tube life is
limited.
- Be careful with the input leads. They carry dangerous
voltages. Accidental shorting of the Detector Input
with the HV on will probably destroy the input
transistor amplifier.
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keywords: radiation counter, alpha ray measurement device, beta ray measurement device, gamma ray measurement device, nuclear measurement device.
Document created circa 1980. Original author: Unknown.