General Information

Introduction 1

Section 1

General Information

1.1 Introduction

The Model 07-453 Digital Pulse Counter measures exposure time for a wide variety of x-ray generators. For half-wave x-rays such as dental machines, the instrument is always used in Pulse mode. The instrument will display the number of pulses. For DC or 3-phase x-rays, the 07-453 is always used in Millisec mode. After an exposure, the instrument will indicate the exposure time in milliseconds. For full- wave x-rays, the operator may need to try both modes. For most full-wave x-rays, especially at low power settings, the 07-453 should be used in Pulse mode. The unit will indicate the number of x-ray pulses. Many full-wave x-ray waveforms have a DC component. In other words, the x-ray output does not drop to zero between pulses. When this occurs, the 07-453 will read 1(one) when used in Pulse mode. The output of a DC x-ray is actually one pulse, so the instrument is reading correctly. To measure the exposure time, simply switch the instrument to Millisec and the instrument will time the x-ray in milliseconds.

NOTE

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.

1.2 Description

The Digital X-Ray Pulse Counter/Timer is used to measure the duration of radiation output produced by x- ray generators. This solid-state, digital instrument is designed specifically to aid 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 Digital X-Ray Pulse Counter/Timer can be used as follows:

1.To count the number of x-ray pulses produced by half-wave and full-wave rectified machines; typically 60 pulses per second for half-wave rectified machines or 120 pulses per second for full- wave. Dental x-ray machines are typically 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 (65 to 130 VAC) via the front panel input jacks and test leads.

The Digital X-Ray Pulse Counter/Timer replaces not only mechanical impulse counters, but also other electronic counters. Its small hand-held size allows it to conveniently fit in a small tool box/jacket pocket.

There is no “Reset” button. The Digital X-Ray Pulse Counter/Timer automatically resets at the beginning of each exposure, holding the reading until the next exposure.

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Fluke 07-453 manual Introduction, Description
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07-453 specifications

The Fluke 07-453 is a versatile and reliable digital multimeter that is designed for a wide range of electrical measurements and troubleshooting applications. Known for its robustness and accuracy, it stands out as a preferred choice for professionals in various fields, including electrical engineering, maintenance, and field service.

One of the main features of the Fluke 07-453 is its ability to measure voltage, current, resistance, continuity, and frequency. It supports both AC and DC measurements, allowing users to assess different types of circuits with ease. With a maximum voltage measurement capability of 1000V AC and 600V DC, the multimeter can handle a variety of tasks, from low-voltage wiring checks to high-voltage power systems.

The Fluke 07-453 also boasts a high-resolution display that provides clear and accurate readings. The large backlit screen ensures visibility in dimly lit environments, making it ideal for fieldwork. Additionally, the meter is equipped with a data hold function, which allows users to freeze the reading for easier interpretation, especially in situations where they may need to take notes or refer to additional resources.

Another noteworthy characteristic is the Fluke 07-453's durability. Designed to withstand the rigors of daily use, it features a rugged casing that provides protection against drops, dust, and moisture. This protective design, combined with a long battery life, makes it a dependable tool for professionals who often work in challenging environments.

In terms of technology, the Fluke 07-453 employs advanced measurement techniques that enhance accuracy and reliability. Its True RMS measurement capability ensures that it can accurately measure both linear and non-linear loads, which is critical when working with varying frequencies and distorted waveforms.

Safety is also a primary consideration in the design of the Fluke 07-453. It is rated for CAT III and CAT IV applications, meaning it meets stringent electrical safety standards. This feature provides users with peace of mind when working on live circuits, minimizing the risk of electrical shock.

Overall, the Fluke 07-453 digital multimeter is an essential instrument for anyone involved in electrical work. Its combination of advanced features, rugged design, and safety ratings make it a top choice for professionals looking for a reliable tool that delivers accurate results in various conditions.
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