Introduction; Product Overview; Overview; Operating Principle - Nagano Keiki KH15 Series User Manual

1. INTRODUCTION

Check the specifications of the delivered model. Incorrect pressure range, power supply or output will
cause an accident. Make sure to use a model of the designated specifications in a location that meets
your use conditions and that it is properly wired and installed.

2. PRODUCT OVERVIEW

This chapter describes the overview, characteristics, and operating principle of the product.
■2.1 Overview
This is a compact, robust and waterproof pressure transmitter that uses a semiconductor strain
gauge in a pressure detection part. Standard output is 4 to 20 mA DC, 0 to 5 V DC, and 1 to 5 V DC. It
has a terminal box provided with a circuit, which allows you to adjust a zero point and span by
removing the lid of the box.
■2.2 Operating Principle
With a pressure receiving part used as a diaphragm, the product converts pressure into strain and
detects the amount of strain with the semiconductor strain gauge. The detection circuit is a full-bridge
type in which all four sides of the bridge consist of semiconductor strain gauges. The bridge circuit
gives an electric signal proportional to the strain, which is then transmitted as direct current or voltage
by signal conversion at the next circuit stage.
2.2.1 Block Diagram
Pressure P
Amplifier
circuit
Stabilized
power source
< Figure 2-1 >
.
6 6
TY-KH15-007A Rev.2
Output
Output signal
circuit
TY-KH15-007A Rev.3