Panametrics DewPro MMY30 User manual

A40251540 Rev. D
April 2022
Panametrics.com
DewPro®MMY30
User’s Manual

A40251540 Rev. DPanametrics.com
DewPro® MMY30
Trace Moisture Transmitter
User’s Manual
A40251540 Rev. D
April 2022

ii
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DewPro® MMY30 User’s Manual iii
Preface
Information Paragraphs
Note: These paragraphs provide information that provides a deeper understanding of the situation, but is not
essential to the proper completion of the instructions.
IMPORTANT: These paragraphs provide information that emphasizes 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
CAUTION! This symbol indicates a risk of potential minor personal injury and/or severe damage to
the equipment, unless these instructions are followed carefully.
WARNING! This symbol indicates a risk of potential serious personal injury, unless these
instructions are followed carefully.
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! Auxiliary equipment may have both manual and automatic modes of operation. As
equipment can move suddenly and without warning, do not enter the work cell of this
equipment during automatic operation, and do not enter the work envelope of this
equipment during manual operation. If you do, serious injury can result.
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 DewPro® MMY30 User’s Manual
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.
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive 2012/19/EU
Baker Hughes is an active participant in the European Union’s (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 https://www.bakerhughesds.com/health-safety-and-environment-hse for take-back instructions and more
information about this initiative.

DewPro® MMY30 User’s Manual v
Contents
Chapter 1. General System Information
1.1 Unpacking and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Product Order String. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.1 Unit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.2 Optional Display/User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.1 4 to 20 mA Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.2 Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.3 Planar Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.4 Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 2. Installation Guidelines
2.1 General Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Method I - Orifice at Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2.1 Pressure Dewpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2.2 Air Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Method II - Orifice at Inlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Method III - No Flow Restriction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5 Method IV - Bypass Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 3. Wiring Instructions
3.1 General Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.2 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.2.1 Various Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.2.2 Designing the Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Mounting in Normal Environments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Mounting in Environments with Severe Electrical Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.5 Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.6 General Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Chapter 4. Optional Display/User Interface (Option G or H)
4.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.1.1 DewPro MMY30 with Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.1.2 Replacing the Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.2 Description of the DewPro MMY30 Programming Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3 Matrix Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4 Special Functions of the Push Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5 Functions of the Matrix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.5.1 Display and Output Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.2 Special Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4.5.3 Mode of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Chapter 5. Troubleshooting
5.1 Problems and Recommended Solutions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2 Removing the Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Chapter 6. Technical Specifications
6.1 MMY30 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 Optional Onboard Display with User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.3 EMC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.4 Hazardous Area Approvals (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix A. User Interface Matrix Input
Warranty

Contents
vi DewPro® MMY30 User’s Manual
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DewPro® MMY30 User’s Manual 1
Chapter 1. General System Information
Chapter 1. General System Information
1.1 Unpacking and Inspection
Upon receipt of the DewPro MMY30 transmitter, examine the shipping carton for broken or open packing, distortion, or
any other evidence of mishandling. If an examination indicates there is damage to the unit or any of its components,
notify the carrier (within 15 days of delivery) and request an inspection.
Move the carton to a clean work area and unpack it. The carton should contain:
•DewPro MMY30
•User’s Manual
•Calibration Certificate
Compare the last five characters (numbers or letters) of the model number on the product label (see Figure 1 below)
with the product ordering string in Table 1 on page 2 to ensure you have received the proper instrument.
Figure 1: DewPro MMY30 Product Label

Chapter 1. General System Information
2 DewPro® MMY30 User’s Manual
1.2 Product Order String
Table 1: Product Order String
Category Digit Description
Certification/
Approvals R Safe area
A IS: CL I/II/III, Div 1, GP ABCDEFG
B XP-IS: CL I, Div 1, GP ABCD
C NI: CL I, DIV 2, GP ABCD and DIP: CL II/III, DIV 1, GP EFG
F II 3 G, Ex nA IIC T4 (Manufacturer's ATEX declaration)
S Other
Process
Connection 1 ½” MNPT (1/4” tube fitting if B, C or D is selected below)
2 G ½ (6 mm tube fitting if B, C or D is selected below)
S Other
Orifice
Configuration A Inlet: None; Outlet: Orifice, with ¼” FNPT
B Inlet: None; Outlet: Orifice, with (6 mm) ¼” tube fitting
C Inlet: None; Outlet: None, with (6 mm) ¼” tube fitting
D Inlet: Orifice; Outlet: None, with (6 mm) ¼” tube fitting
S Other
Enclosure
Conduit 1 M20 X 1.5 F with cable gland
2 1/2” FNPT adaptor
S Other
Output
Configuration/
Dewpoint Range
A Td -90°C to +10°C (-130°F to +50°F), no display, error 22 mA
B Td -90°C to +10°C (-130°F to +50°F), no display, error Hold
C Td -90°C to +10°C (- 130°F to +50°F), no display, error 3.6 mA
D 0-100 ppmv 1 bar, no display, error 22 mA
E 0-100 ppmv 1 bar, no display, error Hold
F 0-100 ppmv 1 bar, no display, error 3.6 mA
G With integral display/user interface
H With integral display/user interface, includes moisture units lbs/MMSCF, natural gas
S Other

DewPro® MMY30 User’s Manual 3
Chapter 1. General System Information
1.3 Introduction
1.3.1 Unit Description
The DewPro MMY30 trace moisture transmitter (shown in Figure 2 below) is a loop-powered dewpoint measuring
device. The transmitter includes a sensor element, a flow chamber, a weather-proof enclosure, microprocessor
electronics, and assorted fittings, all in a compact assembly. In most cases, either the inlet or outlet port includes an
orifice to regulate the flow. The placement of this orifice determines whether the dewpoint measurement is done at
process (line) pressure (outlet orifice), or at atmospheric pressure (inlet orifice). A 2 micron sintered inlet filter
prevents solid particles from entering the device.
Figure 2: DewPro MMY30 Transmitter
1.3.2 Optional Display/User Interface
The optional display/user interface feature allows the MMY30 to be configured to the user's specifications. See
Chapter 4 for more information.

Chapter 1. General System Information
4 DewPro® MMY30 User’s Manual
1.4 Theory of Operation
1.4.1 4 to 20 mA Loop
The DewPro MMY30 transmitter is powered by a DC voltage supply from 12 to 28 VDC. At the nominal 24 VDC supply,
the maximum loop resistance is 600 ohms. The signal is represented by the 4 to 20 mA loop current and is directly
proportional to the dewpoint range in °C or °F. In the standard range, 4 mA corresponds to –90°C (–130°F) and 20 mA
to +10°C (+50°F) dewpoint temperature. The optional unit of measure is ppmv with a standard range 0-100 ppmv.
1.4.2 Bypass
In dryer applications, the moisture sensor performs best when mounted in a bypass. The built-in bypass of the
DewPro MMY30 eliminates costly hardware associated with traditional sampling methods. The DewPro MMY30
installs simply into the process with its G½ or ½” MNPT threaded connection.
1.4.3 Planar Sensor
The heart of the DewPro MMY30 transmitter is the planar aluminum oxide sensor that provides longer calibration
stability, excellent corrosion resistance, and improved speed of response. The sensor is mounted on a ceramic
substrate, giving a reduced temperature coefficient.
1.4.4 Calibration
Each DewPro MMY30 is factory calibrated against precise NIST certified moisture references and has an accuracy of
±2°C dewpoint at 25°C temperature.

DewPro® MMY30 User’s Manual 5
Chapter 1. General System Information
1.5 Dimensions
Choose a mounting location which allows enough clearance for the use of tools and for connection of the field
validator. Figure 3 below shows the dimensions of the standard DewPro MMY30, and Figure 4 on page 6 shows the
DewPro MMY30 with the optional display/user interface.
Figure 3: Standard DewPro MMY30 Dimensions
Note: Dimensions are in inches (millimeters)

Chapter 1. General System Information
6 DewPro® MMY30 User’s Manual
Figure 4: DewPro MMY30 Dimensions with Optional Display/User Interface
1.92 (48)

DewPro® MMY30 User’s Manual 7
Chapter 2. Installation Guidelines
Chapter 2. Installation Guidelines
2.1 General Hints
•Mount the DewPro MMY30 vertically whenever possible to prevent solid particles or condensation from entering
the bypass line.
•Mount the DewPro MMY30 downstream from a shut-off valve to depressurize the DewPro MMY30 when
removing it from the process pipe for maintenance or field compensation.
CAUTION! Before installation, please read all instructions. The DewPro MMY30 is designed to be
mounted on pressurized systems. Take all necessary precautions when mounting or
removing the DewPro MMY30.
CAUTION! Do not over-tighten the DewPro MMY30 connections! The outlet fitting is connected to
the bypass block with a gasketed G 1/4 straight thread which will seal properly if the
fitting is simply hand-tightened. When connecting an external device, hold the fitting
with a second wrench when tightening the connection. If the inlet is equipped with a
gasketed G 1/2 straight thread, the seal is obtained by simply hand-tightening the
DewPro MMY30.
CAUTION! If you are installing the DewPro MMY30 into a pressurized system (up to 10 bar),
depressurize the system before installing or removing the sensor. Pressurized systems
require stainless steel compression fitting.

Chapter 2. Installation Guidelines
8 DewPro® MMY30 User’s Manual
2.2 Method I - Orifice at Outlet
Figure 5 below illustrates installation of the DewPro MMY30 at the outlet orifice.
Figure 5: DewPro MMY30 Installation at Outlet Orifice
2.2.1 Pressure Dewpoint
Air dryers producing general instrument air are typically specified with a pressure dewpoint rating. The majority of
dryers operate in a dewpoint range between –40°C and –75°C (–40°F and –100°F). A pressure of 7-8 bar (100 psig) is
very common.
2.2.2 Air Flow
The DewPro MMY30 is designed to measure the pressure dewpoint. By restricting the flow at the outlet of the integral
bypass with an orifice, the sensor monitors the dewpoint at process pressure. The flow rate of the bleed-off air to the
atmosphere at 7-8 bar (100 psig), is approximately 70 cc/min (28 L/h / 1.0 SCFH). For smaller dryers with flow rates of
3m3/min (100 ft3/min) the air loss is only 0.002% of the air production and is negligible. Despite the very low flow rate
through the bypass, the air sample in the DewPro MMY30 bypass chamber is refreshed every second due to the small
hold-up volume design of the chamber. As a result, the sensor responds to changes in moisture content
instantaneously. Due to the low flow rate, the flow velocity is also very low at <0.01 m/sec (34 m/h).This low flow
velocity prevents the inlet filter from clogging since there is not enough kinetic energy to push dust particles into the
filter.

DewPro® MMY30 User’s Manual 9
Chapter 2. Installation Guidelines
2.3 Method II - Orifice at Inlet
Figure 6 below illustrates installation of the DewPro MMY30 at the inlet orifice.
Figure 6: DewPro MMY30 Installation at Inlet Orifice

Chapter 2. Installation Guidelines
10 DewPro® MMY30 User’s Manual
2.4 Method III - No Flow Restriction
Low-pressure, closed-loop drying systems, which are very common with hopper dryers in the plastics industry,
operate at very low pressures of a few inches of water. The air passing through the DewPro MMY30 bypass line is fed
back to the main stream after a pressure drop in the main line. In this configuration, the DewPro MMY30 bypass has
no flow restriction at either the inlet or the outlet.The outlet is equipped with a 1/4” (6 mm) tube fitting to allow simple
connection of the loop tubing.
Figure 7 below illustrates installation of the DewPro MMY30 with no flow restrictions.
Figure 7: DewPro MMY30 Installation with No Flow Restriction

DewPro® MMY30 User’s Manual 11
Chapter 2. Installation Guidelines
2.5 Method IV - Bypass Installation
In some cases there may not be enough room to install the DewPro MMY30 directly to the process pipe. The tube
connection at the inlet enables mounting the DewPro MMY30 at a remote location. Any of the functions described for
Methods I-III can be selected. The DewPro MMY30 can be mounted on a wall or a plate using the optional mounting
bracket, as shown in Figure 9 on page 12.
Figure 8 below illustrates installation of the DewPro MMY30 with a bypass line.
Figure 8: DewPro MMY 30 Remote Wall-Mount Installation with Bypass

Chapter 2. Installation Guidelines
12 DewPro® MMY30 User’s Manual
Figure 9: DewPro MMY30 with Various Mounting Brackets
6.50 in.
(165 mm)
2.76 in.
(70 mm)
4.45 in.
(113 mm)
3.23 in.
(82 mm)
4.45 in.
(113 mm)
2.95 in.
(75 mm)
0.79 in.
(20 mm)
4.45 in.
(113 mm)
Panel Mounting Vertical Pipe Mounting
Horizontal Pipe Mounting Horizontal Pipe Mounting