GE VeriDri User manual

GE
Measurement & Control Moisture
916-095 Rev. D
March 2015
VeriDri™
Moisture Transmitter
User’s Manual

www.ge-mcs.com
©2015 General Electric Company. All rights reserved.
Technical content subject to change without notice.
GE
Measurement & Control
VeriDri™
Moisture Transmitter
User’s Manual
916-095 Rev. D
March 2015

ii
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Preface
VeriDri™ User’s Manual iii
Information Paragraphs
Note: These paragraphs provide additional information about the topic which is
helpful but is not essential to proper completion of the task.
Important: These paragraphs provide emphasis to instructions that are essential
to proper setup of the equipment. Failure to follow these instructions
carefully may cause unreliable performance.
Safety Issues
Auxiliary Equipment
Local Safety Standards
The user must make sure that he operates all auxiliary equipment in accordance
with local codes, standards, regulations, or laws applicable to safety.
WARNING! Indicates a potentially hazardous situation which
can result in serious personal injury or death, if it is not avoided.
CAUTION! Indicates a potentially hazardous situation which
can result in minor or moderate injury to personnel or damage to
the equipment, if it is not avoided.
WARNING! It is the responsibility of the user to make sure all
local, county, state and national codes, regulations, rules and
laws related to safety and safe operating conditions are met for
each installation.

Preface
iv VeriDri™ User’s Manual
Working Area
Qualification of Personnel
Make sure that all personnel have manufacturer-approved training applicable to the
auxiliary equipment.
Personal Safety Equipment
Make sure that operators and maintenance personnel have all safety equipment
applicable to the auxiliary equipment. Examples include safety glasses, protective
headgear, safety shoes, etc.
Unauthorized Operation
Make sure that unauthorized personnel cannot gain access to the operation of the
equipment.
WARNING! It is the responsibility of the user to make sure all
local, county, state and national codes, regulations, rules and
laws related to safety and safe operating conditions are met for
each installation.
WARNING! Make sure that power to the auxiliary equipment is
turned OFF and locked out before you perform maintenance
procedures on the equipment.

Preface
VeriDri™ User’s Manual v
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive
GE Measurement & Control Solutions is an active participant in Europe’s Waste
Electrical and Electronic Equipment (WEEE) take-back initiative, directive
2012/19/EU.
The equipment that you bought has required the extraction and use of natural
resources for its production. It may contain hazardous substances that could impact
health and the environment.
In order to avoid the dissemination of those substances in our environment and to
diminish the pressure on the natural resources, we encourage you to use the
appropriate take-back systems. Those systems will reuse or recycle most of the
materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use those systems.
If you need more information on the collection, reuse and recycling systems, please
contact your local or regional waste administration.
Visit http://www.ge-mcs.com/en/about-us/environmental-health-and-safety/
1741-weee-req.html for take-back instructions and more information about this
initiative.

Preface
vi VeriDri™ User’s Manual
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Contents
VeriDri™ User’s Manual vii
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2 Sample System Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
3 Inserting the Transmitter into the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4 Making the Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
5 Operating the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5.1 Powering Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5.2 Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
6 Cleaning the Transmitter Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
6.1 Removing the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.2 Soaking the Sensor and Shield. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.3 Evaluating the Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.1 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.2 Electronics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.3 Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.4 Moisture Sensor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Contents
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Operating Instructions
VeriDri™ User’s Manual 1
1 Introduction
The GE VeriDriTM is a low-cost, loop-powered transmitter that provides
accurate dew/frost point measurements covering an overall range of
–110oto 40°C (-166oto 104oF). 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 2
•“Inserting the Transmitter into the System” on page 4
•“Making the Wiring Connections” on page 6
•“Operating the Transmitter” on page 8
•“Cleaning the Transmitter Probe” on page 9
•“Specifications” on page 13

Operating Instructions
2 VeriDri™ User’s Manual
2 Sample System Guidelines
You can install the VeriDri transmitter either 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 page 3 for an
example of a suitable sample system.
•See “Specifications” on page 13 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.

Operating Instructions
VeriDri™ User’s Manual 3
2 Sample System Guidelines (cont.)
Figure 1: Sample System Example
Sample
Cell
Sample
Inlet
Sample
Outlet
Vent

Operating Instructions
4 VeriDri™ User’s Manual
3 Inserting the Transmitter into the System
Complete the steps below to install the VeriDri:
1. Make sure the sintered or sheet stainless-steel shield is in place. The
shield protects the aluminum oxide sensor from damaging elements
in the process.
2. The probe is mounted into the process via the 3/4-16 straight male
thread located on the probe. Thread the probe end of the transmitter
into the process/sample system fitting, making sure not to cross
thread it.
CAUTION! If you are mounting the VeriDri directly into the
process line, you must consult GE for proper installation
instructions and precautions before beginning the following
procedure.
Shield
3/4-16 UNF-2A

Operating Instructions
VeriDri™ User’s Manual 5
3 Inserting the Transmitter into the System (cont.)
3. Using a 1-1/8 in. wrench, tighten the probe securely into the system
using the probe hex nut.
CAUTION! Do not apply force on the transmitter module to
tighten the unit into its fitting.
Probe Hex Nut

Operating Instructions
6 VeriDri™ User’s Manual
4 Making the Wiring Connections
You must wire the transmitter using the factory-supplied cable, which is
available in a variety of lengths.
Note: If you need to lengthen cables, refer to Table 1 below to splice an
extension onto the existing cable. Be sure to connect positive to
positive and negative to negative.
Use the following steps to wire the transmitter to your system:
1. Push the female connector end on the transmitter cable into the
mating male connector on the transmitter module. Make sure the
pins are properly aligned. Then, secure the connectors together by
sliding the metal sleeve on the cable over the connectors and
turning it clockwise until it is tight.
2. Using the flying leads at the other end of the transmitter cable,
connect the transmitter to your power supply and data acquisition
system (DAS), as shown in Figure 2 on page 7. Refer to Table 1
below for a description of the leads on the factory-supplied cable.
3. Trim any unused leads back to the outer cable jacket, to remove the
bare tinned wire and prevent accidental short circuits.
The VeriDri is now ready for operation.
Table 1: Cable Lead Descriptions
Lead Color* Connection Description
Blue (+) 7 to 28 VDC
Brown (−) 7 to 28 VDC
Shield Connect to ground, if desired
*The blue and brown leads also produce a current output
equivalent to 4 to 20 mA.

Operating Instructions
VeriDri™ User’s Manual 7
4 Making Wiring Connections (cont.)
Figure 2: Wiring Connections
Power and
Measurement
Circuits
+ 7-28 VDC
7-28 VDC −
Blue
Brown
Note: The blue and brown leads also generate a current output equivalent to 4 to 20 mA.

Operating Instructions
8 VeriDri™ User’s Manual
5 Operating the Transmitter
After proper installation, the VeriDri transmitter is very easy to use. Simply
power the unit up and you are ready to begin taking measurements. As the
VeriDri stores moisture calibration data in non-volatile FLASH memory,
you do not have to enter data manually or worry about losing data during a
power loss.
Probes may need to be cleaned occasionally, depending on the application.
Consult a GE Applications Engineer for recommended cleaning intervals.
If a problem should arise with the probe, see “Error Handling” below for
the transmitter reactions to various error conditions.
5.1 Powering Up
After the VeriDri is wired as described in the previous section, you may
apply power to the unit. The transmitter takes approximately 20 seconds to
initialize and begin normal operation. The unit will meet specified accuracy
in about 3 minutes.
5.2 Error Handling
In the event of an error condition, the analog output reading is forced to the
following values:
•≥ 22 mA to indicate a short circuit in the probe
•≤ 3.5 mA to indicate an open circuit in the probe
CAUTION! Any attempt to open the module or remove the
sensor probe will void your warranty.

Operating Instructions
VeriDri™ User’s Manual 9
6 Cleaning the Transmitter Probe
To clean the moisture probe, you will need the following items:
•Three glass (NOT metal) containers with the following solvents:
•2 containers, each with approximately 300 ml of reagent-grade
hexane or toluene
•1 container, with approximately 300 ml of distilled (NOT
deionized) water.
•Rubber or latex gloves.
•An oven set at 50°C ± 2°C (122°F ± 3.6°F), for drying the probe
•A 1-1/8 in. wrench
Refer to the following sections to properly clean the probe.
CAUTION! Be sure to perform the probe cleaning procedure in
a well ventilated area. Observe all necessary safety precautions
when handling cleaning solvents.
CAUTION! Make sure the containers are deep enough to
submerge the probe. Do not place the transmitter module into
the solvents. You should only insert the sensor portion of the
transmitter into the solvents.

Operating Instructions
10 VeriDri™ User’s Manual
6.1 Removing the Transmitter
Complete the following steps to remove the transmitter from the system:
Note: After the probe is cleaned, it must dried in the oven for 24 hours.
1. Using a 1-1/8 in. wrench, unthread the transmitter from the fitting
on the sample system/process using the probe hex nut as indicated
below.
2. Record the dew point of the ambient air.
3. Disconnect the cable from the transmitter module.
4. Unscrew the stainless-steel shield from the probe mount, and
carefully remove it without touching the sensor.
CAUTION! Any attempt to open the module or remove the
probe from the module will void your warranty.
Probe Hex Nut
Shield