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1.1 Product Description
The Fluke Biomedical Model 07-453 X-ray Timer/Counter is used to measure the duration of radiation
output produced by X-ray generators. The Model 07-453 is a solid-state, digital instrument designed
specifically for service personnel in assessing the performance of radiation generator timing controls.
The instrument is a noninvasive instrument, which samples the radiation beam of x-rays.
The Model 07-453 can be used as follows:
1) To count the number of x-ray pulses produced by half-wave and full-wave rectified machines. It
will count the output pulses typically 60 pulses per second for half-wave rectified machines or 120
pulses per second for full-wave. Dental x-ray machines are usually half-wave rectified.
2) To measure the length of radiation output when the x-ray output is steady state such that "pulsing"
does not exist. X-rays that generate steady outputs include 3-phase AC medical x-ray machines;
capacitor discharge x-ray machines and DC operated x-rays.
3) To measure the "on time" or relay contact closure time by counting the number of pulses of AC
line voltage (90 to 130 VAC) via the front panel input jacks and test leads.
The Model 07-453 replaces not only mechanical impulse counters, but also other electronic counters.
The small hand held size conveniently fits in a small toolbox, jacket pocket or handbag.
There is no "Reset" button. The Model 07-453 automatically resets at the beginning of each exposure,
holding the reading until the next exposure.
The most convenient way of using the 07-453 is to place it directly under the x-ray head. Step back, take
the exposure and then read the exposure time in pulses or milliseconds. An optional remote sensor is
also available to allow use of the 07-453 at distances of up to 10 feet away from the x-ray.
It is important that the user be thoroughly familiar with the contents of this manual before performing any
tests on radiation generating equipment. It is also imperative that the user be thoroughly qualified, and
familiar with safety precautions and other practices relating to radiation generators.
Description
Section 1
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