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ManualsBrandsFLUKE CALIBRATION ManualsTest EquipmentP5514-70M Calibrator Pressure Calibrated to Manufacturer's standards (no certificate)

How to choose a

pressure comparator

Application Note

From the Fluke Calibration Digital Library @ www.flukecal.com/library

Pressure calibrators don’t need to be

expensive or complicated. A common

approach is to use a pressure compara-

tor (also known as a comparison test

pump) and a reference gauge. To make

things easy, here are a few things you

should consider to choose the right com-

parator for your application.

The basics

To perform a pressure calibration, you need

to generate a stable pressure and measure it

accurately. Here is how it works when you use

a pressure comparator:

• A pressure comparator generates a stable

pressure.

• A reference gauge accurately measures the

pressure.

• The device under test (DUT) is compared to

the reference gauge.

There are a number of different pressure

comparators on the market. Each uses a differ-

ent technology with unique advantages and

disadvantages, depending on the application.

For example, some comparators are designed to

work in gas and others are designed to work in

fluid. Let’s look at the reasons you might choose

one over the other.

P5515P5510

Summary of content (4 pages)

PAGE 1
How to choose a pressure comparator Application Note Pressure calibrators don’t need to be expensive or complicated. A common approach is to use a pressure comparator (also known as a comparison test pump) and a reference gauge. To make things easy, here are a few things you should consider to choose the right comparator for your application. The basics To perform a pressure calibration, you need to generate a stable pressure and measure it accurately.
PAGE 2
Gas pressure comparators A gas pressure comparator is normally used for calibrating at relatively lower pressures. Its main benefit is cleanliness. If the device being tested is used in a process that doesn’t tolerate liquid contaminants, then you’ll probably want to use a gas pressure comparator. Most gas pressure comparators allow you to adjust and regulate the supply pressure, either through a pump or a needle valve.
PAGE 3
Liquid pressure comparators The ideal design for the priming pump includes a displacement that allows for a large amount Liquid pressure comparators are normally used of fluid to be pushed through the system at for calibrating higher pressures. Since liquid one time and check valves to ensure that it is does not compress, a liquid pressure comparator always drawing fluid from the reservoir and can generate higher pressures more easily than pushing it into the system. a gas pressure comparator can.
PAGE 4
Test port connections Priming pump Pressure generation and fine adjustment Features to look for in a liquid pressure comparator, as shown on a Fluke Calibration P5515 Comparison Test Pump. Features to look for in a liquid pressure comparator • Test port connections. Using a pressure comparator to calibrate a device requires that both a reference gauge and a device under test to be connected to the comparator.