Panametrics VeriDri User manual

panametrics.com 916-095 D
Dec 2021
VeriDri™
Moisture Transmitter
User’s Manual

panametrics.com
Copyright 2021 Baker Hughes company.
This material contains one or more registered trademarks of Baker Hughes Company and its subsidiaries
in one or more countries. All third-party product and company names are trademarks of their respective
holders.
VeriDri™
Moisture Transmitter
User’s Manual
916-095 D
Dec 2021

ii
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VeriDri™ User’s Manual iii
Preface
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.
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! 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.
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
iv VeriDri™ User’s Manual
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive
Baker Hughes 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 www.bakerhughesds.com/health-safety-and-environment-hse for take-back instructions and more
information about this initiative.

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

Contents
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VeriDri™ User’s Manual 1
Introduction
1. Introduction
The Panametrics VeriDriTM is a low-cost, loop-powered transmitter that provides accurate dew/frost point
measurements covering an overall range of –110o to 40°C (-166o to 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 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.

Inserting the Transmitter into the System
2 VeriDri™ User’s Manual
Figure 1: Sample System Example
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
Panametrics for proper installation instructions and precautions before beginning the
following procedure.
Sample
Cell
Sample
Inlet
Sample
Outlet
Vent
Shield
3/4-16 UNF-2A

VeriDri™ User’s Manual 3
Making the Wiring Connections
3. Using a 1-1/8 in. wrench, tighten the probe securely into the system using the probe hex nut.
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 4. 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.
CAUTION! Do not apply force on the transmitter module to tighten the unit into its fitting.
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.
Probe Hex Nut

Operating the Transmitter
4 VeriDri™ User’s Manual
Figure 2: Wiring Connections
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 Panametrics 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.
CAUTION! Any attempt to open the module or remove the sensor probe will void your warranty.
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.

VeriDri™ User’s Manual 5
Cleaning the Transmitter Probe
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
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.
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! 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.
Probe Hex Nut

Cleaning the Transmitter Probe
6 VeriDri™ User’s Manual
6.2 Soaking the Sensor and Shield
While wearing protective gloves, complete the following steps:
1. Place the sensor in the first container of hexane or toluene and allow it to soak for 10 minutes.
2. Remove the sensor from the hexane or toluene and soak it in the container of distilled water for 10 minutes.
3. Remove the sensor from the distilled water and soak it in the second (clean) container of hexane or toluene for 10
minutes.
4. Remove the sensor from the hexane or toluene and set it aside until the shield has completed its cleaning cycle.
5. Clean the shield by repeating steps 1 to 3 above. To ensure the removal of any contaminants that may have
become embedded in the porous walls of the shield, swirl the shield in the solvents during the soaking
procedures.
6. Remove the shield from the hexane or toluene.
7. Carefully replace the shield over the exposed sensor, without touching the sensor.
8. Place the sensor with the installed shield in an oven set at 50°C ± 2°C (122°F ± 3.6°F) for 24 hours.
6.3 Evaluating the Probe
To evaluate the probe, complete the following steps:
1. Re-connect the cable to the transmitter module and measure the ambient dew point. Make sure you measure
the same ambient air as measured in step 2 on page 5.
2. Compare the two ambient air readings. If the new ambient air reading is within ±2°C (±3.6°F) of the first reading,
the cleaned probe is properly calibrated and may be reinstalled. If the two readings not within that tolerance,
proceed to step 3 below.
3. If the probe is still not reading the ambient air accurately, repeat the cleaning procedure using soaking times
that are 5 times the previous cleaning sequence, until two consecutive ambient air readings are within ±2°C
(±3.6°F).
If the above cleaning procedure does not result in accurate readings, contact Panametrics for assistance.
CAUTION! Any attempt to open the module or remove the probe from the module will void your
warranty.
CAUTION! Do not place the transmitter module into the solvents. You should only insert the sensor
portion of the transmitter into the solvents. Also, do not allow the sensor to come into
contact with the surfaces of the cleaning containers or any other hard surface.
Shield

VeriDri™ User’s Manual 7
Specifications
7. Specifications
7.1 General Specifications
Moisture Ranges
• –110o to 20°C
• –110o to –50°C
• –80o to 20°C
• –80o to –30°C
• –30o to 20°C
• –60o to 40°C
• –150o to 70°F
• –150o to –40°F
• –40o to 70°F
• –100o to 0°F
• –50o to 50°F
• 0o to 100°F
• 0 to 10 PPMv
• 0 to 100 PPMv
• 0 to 1000 PPMv
• 0 to 10,000 PPMv
Note: PPMv ranges are based on a constant pressure, which was provided at the time of the order.
Operating Temperature
–40° to 60°C (–40° to 140°F)
Storage Temperature
70°C (158oF) maximum
Note: The probe should be stored with the plastic cover and desiccant packet threaded onto the probe. Store it in
a cool, dry environment.
Warm-up Time
Meets specified accuracy in 3 minutes
Calibrated Accuracy at 25°C (77°F)
• ± 2°C (3.6°F) from –65o to 10°C (–85o to 50oF)
• ± 3°C (5.4°F) from –80o to 66°C (–112o to 87oF)
Repeatability
• ± 0.5°C (0.9°F) from –65o to 10°C (–85o to 50oF)
• ± 1.0°C (1.8°F) from –80o to –66°C (–112o to –87oF)
7.2 Electronics
Power
•Supply Voltage: 7 to 28 VDC (loop-powered, customer supplied)
•Output: 4 to 20 mA
•Output Resolution: 0.01 mA

Specifications
8 VeriDri™ User’s Manual
•Max. Loop Resistance: R = 50   (PSV–7), where PSV = Power Supply Voltage
Example: For a PSV = 24 VDC, R = 50   (24–7) = 850 
•Cable: 2 m, standard (consult factory for custom lengths)
7.3 Mechanical Specifications
Sample Connection
3/4-16 straight, male thread with o-ring
Operating Pressure
5 m Hg to 5,000 psig (345 bar)
Enclosure
Type 4X/IP67
European Compliance
See the EC Declaration of Conformity at the end of this manual
Dimensions
•Overall: 8.51  1.125 in. (21.62  2.86 cm)
•Electronics Module w/cable: 5.93  1.125 in. (15.06  2.86 cm)
•Weight: 5 oz (140 g)
7.4 Moisture Sensor Specifications
Sensor Type
Thin-film aluminum oxide moisture sensor probe
Calibration
Each sensor is individually computer-calibrated against known moisture concentrations, traceable to NIST
Calibration Interval
Factory sensor recalibration by Panametrics is recommended every
6-12 months, depending on the application
Calibration Data
Factory-calibrated, stored in FLASH memory
Flow Rate
•Gases: Static to 10,000 cm/s linear velocity, at a pressure of 1 atm
•Liquids: Static to 10 cm/s linear velocity, at a density of 1 g/cc
3/4-16 UNF-2A
2.58 [65.53]
2.58 [65.53]
1.125 [28.58]
3.35 [85.10]
MIN
CABLE BEND
ALLOWANCE

VeriDri™ User’s Manual 9
Warranty
Warranty
Each instrument manufactured by Panametrics is warranted to be free from defects in material and workmanship.
Liability under this warranty is limited to restoring the instrument to normal operation or replacing the instrument, at
the sole discretion of Panametrics. Fuses and batteries are specifically excluded from any liability. This warranty is
effective from the date of delivery to the original purchaser. If Panametrics determines that the equipment was
defective, the warranty period is:
•one year from delivery for electronic or mechanical failures
•one year from delivery for sensor shelf life
If Panametrics determines that the equipment was damaged by misuse, improper installation, the use of
unauthorized replacement parts, or operating conditions outside the guidelines specified by Panametrics, the repairs
are not covered under this warranty.
The warranties set forth herein are exclusive and are in lieu of all other warranties whether
statutory, express or implied (including warranties or merchantability and fitness for a particular
purpose, and warranties arising from course of dealing or usage or trade).
Return Policy
If a Panametrics instrument malfunctions within the warranty period, the following procedure must be completed:
1. Notify Panametrics, giving full details of the problem, and provide the model number and serial number of the
instrument. If the nature of the problem indicates the need for factory service, Panametrics will issue a RETURN
AUTHORIZATION NUMBER (RAN), and shipping instructions for the return of the instrument to a service center will
be provided.
2. If Panametrics instructs you to send your instrument to a service center, it must be shipped prepaid to the
authorized repair station indicated in the shipping instructions.
3. Upon receipt, Panametrics will evaluate the instrument to determine the cause of the malfunction.
Then, one of the following courses of action will then be taken:
•If the damage is covered under the terms of the warranty, the instrument will be repaired at no cost to the owner
and returned.
•If Panametrics determines that the damage is not covered under the terms of the warranty, or if the warranty has
expired, an estimate for the cost of the repairs at standard rates will be provided. Upon receipt of the owner’s
approval to proceed, the instrument will be repaired and returned.

Warranty
10 VeriDri™ User’s Manual
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EC DECLARATION
OF
CONFORMITY
Panametircs
We,
Panametrics
1100 Technology Park Drive
Billerica, MA 01821
USA
declare under our sole responsibility that the
VeriDri™ Moisture Transmitter
to which this declaration relates, is in conformity with the following standards:
• EN 61326-1: 2006, Class A, Table 2, Industrial Locations
• EN 61326-2-3: 2006
• EN 60529: 2001, IP67
following the provisions of the 2004/108/EC EMC Directive.
The unit listed above and any ancillary equipment supplied with it do not bear CE marking for the Pressure
Equipment Directive, as they are supplied in accordance with Article 3, Section 3 (sound engineering practices and
codes of good workmanship) of the Pressure Equipment Directive 97/23/EC for DN<25.
E
Billerica - August 23, 2010
Issued Mr. Gary Kozinski
Certification & Standards, Lead Engineer

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