An instrument that displays an input signal in an analog form or a digital form is a panel meter. Some are available with an Ethernet option which can allow the meter reading to be accessed across a local area network (LAN). Some meters include alarms and have the ability to transfer data to a computer.
Panel meters are generally mounted in an instrument and need to be cut to size to accommodate. They are also designed to the standard DIN size to provide interchangeability between the panel meters. The standard industrial sizes are 1/16 DIN 45 mm x 45mm, 1/32 DIN 22.504 mm x 45 mm, DIN 92 mm x 92 mm and 1/8 DIN 45 mm x 92 mm. There are also portables for hand-held purpose. A multi-meter is a portable device that measures the current, voltage, impedance and power. A Geiger counter is a portable device used to measure radiation levels.
There are many types of meters for certain tasks the job might ask. The most common meter is one that will accept a single input and provide a digital display of the signal. They can accept input from temperature sensors such as thermocouples.
Bench top meters are panel meters that are built into a bench top case which provides portability and is used in laboratory applications. Wall mounts are used in the same principal as bench tops. They are used for applications where panels are not available. Tantalizers are a type that provides a summation over time of the input signal. These tantalizers are used most commonly with pulse inputs to provide a count of number of times that it pulses. This is an application used for flow measurement. The large displays on the panel meters are used so the readings can be visible at a distance. There are some that are small, and then go to 4 inches of height. If someone needs a panel meter that can switch from one channel to the next by simply pressing a button on the front of the meter while others automatically scan through a series of channels, they would need a multi-input Indicator and scanners for the task.
Analog panel meters were the first of its kind. Resembling a dial-like gauge, the analogs are not used very often since digital technology has taken over in most applications, but once in a while there is a call for the analog. More often they are used to measure the speed of a moving object and are most commonly seen in cars or motorcycles and even the older bikes.
iAutoblog the premier autoblogger software
No comments:
Post a Comment