Panametrics VeriDri, User Manual, Page: 9 / 22

VeriDri™ User’s Manual 1
Introduction
1. Introduction
The Panametrics VeriDri
TM
is a low-cost, loop-powered transmitter that provides accurate dew/frost point
measurements covering an overall range of –110
o
to 40°C (-166
o
to 104
o
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 includes the following sections:
• “Sample System Guidelines” on page 1
• “Inserting the Transmitter into the System” on page 2
• “Making the Wiring Connections” on page 3
• “Operating the Transmitter” on page 4
• “Cleaning the Transmitter Probe” on page 5
• “Specifications” on page 7
2. Sample System Guidelines
You can install the VeriDri transmitter either into a sample system or directly into the process. Panametrics
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 Panametrics Applications Engineer and adhere to the
guidelines below. See Figure 1 on page 2 for an example of a suitable sample system.
• See “Specifications” on page 7 for The VeriDri 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 from the measurement location.
• If possible, you should use stainless steel components 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 which may
absorb or release components (such as moisture) into the sample system. They may also allow ambient
contamination to enter the sample system.