Digital counter meter has 5 digit display, and frequency/rev/linear speed measuring function. Handheld electronic counter can be customized as special test instrumentation for pulse width detection, duty ratio detection, etc.
- Various parameter settings, simple operation.
- Input: Various waveform pulses (square wave, triangle wave), proximity sensor, photoelectric sensor, voltage signal, contact switch, encoder, etc.
- Digital counter can also be used to measure the power frequency (AC 0-600V), measurement range: 0.01Hz-100KHz, resolution: 0.01Hz.
- 5 digit display, decimal point automatic conversion.
- Input/output signals photoelectric isolated, anti-interference ability.
- Digital output: Up to 3 alarms, high value, low value, high and low-value alarm modes are optional, analog output: 4-20mA or 0-10V transmission output, measuring range setting arbitrarily.
- Standard RS232 or RS485 MODBUS RTU communication, can be directly connected with computers, PLC or other equipment.
In the digital system, the counter mainly counts the number of pulses to realize the functions of measurement, counting and control, and also has the function of frequency division. Digital counters are widely used in various fields, including industrial production, digital systems, traffic signal control, paper cutter positioning and elevator positioning and speed regulation.
Q1: What is a digital counter?
Counting is one of the simplest and most basic operations. In digital logic and computing, a counter is the logic circuit that implements this operation. In digital systems, a counter mainly counts the number of pulses for measurement, counting, control, and other functions. It also has a frequency division function. A digital counter consists of a basic counting unit and some control gates. The counting unit consists of a series of various flip-flops with the function of storing information. These flip-flops include RS flip-flops, T flip-flops, D flip-flops and JK flip-flops. Counters are widely used in digital systems. For example, in the controller of an electronic computer, the next instruction is taken out sequentially by counting the instruction address. The operation unit records the number of additions and subtractions when multiplication and division operations are performed. A counter can be used to indicate the operating status of a product. In general, it is mainly used to indicate how many copies of the product have been folded and sorted. Its main indicator lies in the number of bits of the counter, commonly 3 and 4 bits. Obviously, a 3-digit counter can display up to 999 and a 4-digit counter can display up to 9999.
Q2: How to choose a digital counter?
- The choice of the built-in crystal oscillator.
- The resolution of the digital counter.
- Large screen touch design.
- The counter has more measurement functions.
- Internal crystal oscillator calibration function.
- The communication interface of the counter should be as many as possible.
- Wide measuring range
Q3: Types of counters
- According to whether the flip-flops in the counter are flipped at the same time, the counter can be divided into two types: synchronous counter and asynchronous counter.
- According to the increase and decrease of numbers in the counting process, the counters can be divided into addition counters, subtraction counters, and reversible counters. It is an up counter that keeps increasing with the clock signal, and a down counter that keeps decreasing. A counter that can be incremented or decremented is called a reversible counter.
The most commonly used is the first one because it allows people to know at a glance what triggering method this counter is so that designers can design circuits.
Tips: Digital counter applications in industrial production
In industrial production, it is often necessary to automatically count product quantity. Digital counters are the best choice. Digital counters have the advantages of visual display and accurate counting. It has several counting trigger modes, which are determined by the actual using condition and environment. Digital counters are generally divided into contact counters and non-contact counters, of which non-contact counters with photoelectric sensors are the most widely used.
Counter with a photoelectric sensor uses a photoelectric sensor to form a photoelectric gate and counts objects passing through the photoelectric gate in real-time. Digital counter can effectively control the number of packages in the production line through real-time monitoring, achieve automatic control, save labor costs, and efficiently complete production.
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