GE Sensing MMR30 Operating Manual
GE
Sensing
DewPro® MMR30
General Eastern Mid-Range Moisture Transmitter
User’s Manual
GE
Sensing
DewPro® MMR30
General Eastern Mid-Range Moisture Transmitter
User’s Manual
A40251524A
November 2005
DewPro® is a GE General Eastern product. GE General Eastern has joined other GE high-technology sensing
businesses under a new name—GE Sensing.
November 2005
Warranty Each instrument manufactured by GE Infrastructure Sensing, Inc. 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
GE Infrastructure Sensing, Inc. Fuses and batteries are specifically
excluded from any liability. This warranty is effective from the date of
delivery to the original purchaser. If GE Infrastructure Sensing, Inc.
determines that the equipment was defective, the warranty period is:
• one year for general electronic failures of the instrument
• one year for mechanical failures of the sensor
If GE Infrastructure Sensing, Inc. determines that the equipment was
damaged by misuse, improper installation, the use of unauthorized
replacement parts, or operating conditions outside the guidelines
specified by GE Infrastructure Sensing, Inc., 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 of merchantability and fitness for a
particular purpose, and warranties arising from course of
dealing or usage or trade).
Return Policy If a GE Infrastructure Sensing, Inc. instrument malfunctions within the
warranty period, the following procedure must be completed:
1. Notify GE Infrastructure Sensing, Inc., 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, GE Infrastructure Sensing, Inc. will issue a RETURN
AUTHORIZATION number (RA), and shipping instructions for the
return of the instrument to a service center will be provided.
2. If GE Infrastructure Sensing, Inc. 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, GE Infrastructure Sensing, Inc. 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 GE Infrastructure Sensing, Inc. 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.
iii
November 2005
Table of Contents
Chapter 1: General System Information
Unpacking and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Checking the Model Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Optional Display/User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
4 to 20 mA Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Polymer Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
v
November 2005
Table of Contents (cont.)
Chapter 2: Installation Guidelines
General Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Method I - Orifice at Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Pressure Dewpoint. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Air Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Method II - Orifice at Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Method III - No Flow Restriction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Low Pressure Closed Loop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Method IV - Remote Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Mounting Brackets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Chapter 3: Wiring Instructions
Wiring, General Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Designing the Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Mounting in Normal Environments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Mounting in Environments with Severe Electrical Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
vi
November 2005
Table of Contents (cont.)
Chapter 4: Optional Display/User Interface
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
DewPro with Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Replacing the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Description of the DewPro MMR30 Programming Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Special Functions of the Push Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Functions of the Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
System Administration Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Moisture Measurement Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Setting the Output Range for the Humidity 4-20 mA Output . . . . . . . . . . . . . . . . . . . 4-6
Temperature Measurement Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Directions for Detecting the Correct Error Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Chapter 5: Troubleshooting
Problems and Recommended Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Removing the Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
vii
November 2005
Table of Contents (cont.)
Chapter 6: Technical Specifications
MMR30 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Sensing Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Measurement Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Dew Point Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Standard Operating and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Air Bleedoff at 7 to 8 bar (100 psig). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Maximum Operating Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Flow Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Wrench Width for Flow Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Moisture Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Supply Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
European Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Optional Onboard Display with User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
EMI/RFI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
EMC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
viii
November 2005
Table of Contents (cont.)
Chapter 7: Accessories
Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Appendix A: Matrix Table for Programming
ix
Chapter 1
General System Information
Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
November 2005
Unpacking and Inspection
Upon receipt of the DewPro MMR30, examine the shipping carton
for broken or open packing, distortion, or any other evidence of
mishandling. If inspection indicates damage to the unit or any of its
components, notify the carrier (within 15 days of delivery) and
request an inspection.
Unpacking Move the carton to a clean work area and unpack. The carton you
receive should contain:
• DewPro MMR30
• Installation and Operation Manual
• Calibration certificate
Checking the Model Number
Compare the model number (on the product label) with the product
structure (see Figure 1-1 below) to ensure you have received
everything you ordered.
Figure 1-1: Sample MMR30 Product Label with Model Number
Product S tructure MMR30
Certification/Approvals:
R Standard (not certified)
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 connection
B Inlet: None; Outlet: Orifice, with (6 mm) ¼” tube fitting installed
C Inlet: None; Outlet: None, with (6 mm) ¼” tube fitting installed
D Inlet: Orifice; Outlet: None, with (6 mm) ¼” tube fitting installed
S Other
General System Information 1-1
November 2005
Checking the Model
Number (cont.)
Introduction
Unit Description
Enclosure Conduit:
1 Enclosure conduit M20X 1.5-F with cable gland and plug
2 Enclosure conduit M20X 1.5-F with 1/2” NPT-F adapter and plug
S Other
Output Configuration/Dewpoint Range:
A Td -15°C to +10°C (+5°F to +185°F), no display, error 22 mA
C As A, fault status: hold
D As A, fault status: 3.6 mA
G As A, with integral display, user interface
S Other
The DewPro MMR30 (shown in Figure 1-2 below) is a loop powered
mid-range moisture transmitter. The transmitter includes a sensor
element, a flow chamber, a weatherproof 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 ori fice determines whether the dew point
measurement is done at process (line) pressure (outlet orifice), or at
atmospheric pressure (inlet orifice).
Optional Display/User Interface
The optional display/user interface feature allows the DewPro to be
configured to the user's specifications. See Chapter 4 for more
information.
Figure 1-2: The DewPro MMR30
1-2 General System Information
November 2005
Theory of Operation
4 to 20 mA Loop The DewPro MMR30 microprocessor controlled electronics operate
with a DC voltage supply from 12 to 28 VDC. At the nominal 24
VDC supply , the maximum loop resistance is 600 Ohm. 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 -15°C (+ 5°F) and 20 mA to +85°C (+185°F)
dew point temperature.
Bypass In dryer applications, the moisture sensor performs best when
mounted in a bypass. The built-in bypass of the DewPro eliminates
costly hardware associated with traditional sampling methods. The
DewPro installs easily into the process with its G ½ or ½” NPT-M
threaded connection.
Polymer Sensor The sensing element in the MMR30 is a silicon-based polymer that
uses the capacitance principle for the moisture measurement. The IC
chip includes the moisture sensor and appropriate integrated circuitry.
A platinum RTD temperature sensor is built in to provide temperature
compensation for maximum accuracy. The sensor element is
protected from condensation using a hydrophobic sintered filter.
Calibration Each DewPro is factory calibrated against precise NIST certified
moisture references and has an accuracy of ±1°C dew point for dew
points above 0°C. Field calibration is possible with the use of a
moisture generator. Consult the factory for details.
General System Information 1-3
November 2005
Dimensions Choose a mounting location which allows enough clearance for the
use of tools.
Fig 1-3 below shows installation dimensions for a standard DewPro,
while Figure 1-4 below shows the dimensions for a DewPro with the
optional display/user interface.
Figure 1-3: Standard DewPro Dimensions
Figure 1-4: DewPro with Optional Display/User Interface
1-4 General System Information
Chapter 2
Installation Guidelines
General Hints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Method I - Orifice at Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Method II - Orifice at Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Method III - No Flow Restriction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Method IV - Remote Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
General Hints Caution!
B e f o r e i n s t a l l a t i o n , p l e a s e r e a d a l l i n s t r u c t i o n s .
The DewPro is designed to be mounted to pressurized
systems. Take necessary precautions when mounting or
removing the DewPro.
November 2005
• Mount the DewPro
particles or condensation from entering the bypass.
• Mount the DewPro
DewPro when removing it from the process pipe in case of
maintenance.
Do not over-tighten! The outlet fitting is connected to the
bypass block with a G 1/4 straight thread (with gasket)
which will seal if the fitting is simply hand-tightened. When
connecting an external device, counter the fitting with a
second wrench when tightening. If the inlet is equipped
with a G 1/2 straight thread and gasket, the seal is
obtained by simply hand-tightening the DewPro®.
If you are installing the DewPro into a pressurized system
(up to 10 bar), depressurize the system before installing or
removing the sensor. Pressurized systems require a
stainless steel compression fitting.
®
vertically whenever possible to prevent
®
after a shutoff valve to depressurize the
Caution!
Caution!
Method I - Orifice at Outlet
Figure 2-1: DewPro Installation with Orifice at the Outlet
Installation Guidelines 2-1
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