Cảm biến đo độ ẩm PANAMETRICS VeriDri

Introduction

The GE Sensing & Inspection Technologies VeriDriTM is a lowcost, loop-powered transmitter that provides accurate dew/frost point measurements covering an overall range of –110o to 40°C (-166o to 104o F). It can also be provided to cover a number of moisture ranges from 0 to 10,000 PPMv.

The VeriDri is supplied with one 4 to 20 mA analog output that is factory-configured for a specified range.

The VeriDri is easy to install, operate and maintain. This manual contains the following sections:

• Sample System Guidelines
• Inserting the Transmitter in the Sample System/Process
• Making Wiring Connections
• Operating the Transmitter
• Cleaning the Transmitter Probe
• Specifications

Sample System Guidelines

You can install the VeriDri transmitter into a sample system or directly into the process. GE recommends that the unit be installed in a sample system to protect the probe from coming into contact with damaging elements in the process. Before constructing a sample system, you should consult a GE Applications Engineer and adhere to the guidelines below. See Figure 1 on the next page for an example of a sample system.

• Consult Specifications on page 13 for dimensions and other requirements.
• Sample systems should be kept very simple.
• The transmitter should be installed so it is perpendicular to the sample inlet.
• The sample system should contain as few components as possible and all or most of those components should be located downstream of the measurement location.
• If possible, you should use stainless steel material for all wetted parts.
• Sample system components should not be made of any material that will affect measurement. Most common filters and pressure regulators are not suitable for sample systems because they have wetted parts that may absorb or release components (such as moisture) into the sample system. They may also allow ambient contamination to enter the sample system.