Page 1
GE Industrial
Sensing
DewPro MMY31
General Eastern Trace Moisture Transmitter
Installation and Operation Manual
Page 2
GE Industrial
Sensing
DewPro MMY31
General Eastern Trace Moisture Transmitter
Installation and Operation Manual
A40251548A
September 2005
The
DewPro MMY31
GE high-technology sensing businesses under a new name—GE Industrial Sensing.
is a General Eastern Instruments product. General Eastern Instruments has joined other
Page 3
September 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
Page 4
September 2005
Table of Contents
Chapter 1: General System Information
Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
First 4–20mA Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Planar Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2: Installation
Mounting the MMY31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Wiring Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Designing the Loop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
In a Normal Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
In Environments with Severe Electrical Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
General Wiring Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Chapter 3: Troubleshooting
The Loop Current is Out of Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
There Is No Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Chapter 4: Optional Display/User Interface
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Removing the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Programming Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Push Buttons - Special Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Reset to “Normal” Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Display Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Changing Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Matrix Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Display and Output Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Special Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Mode of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Chapter 5: Specifications
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Optional Onboard Display with User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
EMI/RFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
iv
Page 5
Chapter 1
Page 6
General System Information
Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Page 7
September 2005
Unpacking and Inspection
Upon receipt of the DewPro MMY31, 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.
Move the carton to a clean work area and unpack. The carton you
receive should contain:
• DewPro MMY31
• Installation and Operation Manual
• Calibration Certificate
Compare the last five numbers or letters on the model number (on the
product label shown in Figure 1-1 below) with the product structure
(see below) to ensure you have received everything you ordered.
GE Sensing
1100 Technology Park Dr.
Billerica, MA 01821 USA
Model:
S/N:
Supply:
Range:
Pressure Rating:
MMY31 - R8A2A
Figure 1-1: DewPro MMY31 Product Label
General System Information 1-1
Page 8
September 2005
Certification/Approvals:
R Standard Certification (not certified)
A FM IS Cl. I, II, III, Div. 1; Grps. A-G
B FM XP Cl. I, Div. 1; Grps. A-D
C FM NI Cl. I, Div. 2, Grps. A-D; Cl. II, III, Div. 1; Grps. E-G
F ATE X 3GEEx nA EEx 11C T4
S Other
Table 1: Model Number Configuration
Process Connection:
2 ¾” NPT-M compression fitting
3 ½” NPT-M compression fitting
4 ¾” x 16 “O” ring compression fitting (UNF thread)
6 No mounting hardware
8 G½ compression fitting with gasket
S Other
Protective Cap:
A Standard with 100 micron sintered filter
B Without sintered filter
S Other
Enclosure Conduit:
1 Enclosure Conduit M20 x 1.5-F with cable gland and plug
2 Enclosure Conduit M20 x 1.5-F with ½” FNPT adapter and plug
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 ppm
E 0-100 ppm
F 0-100 ppmv 1 bar, no display, error 3.6 mA
1 bar, no display, error 22 mA
v
1 bar, no display, error Hold
v
G With integral display, user interface
S Other
R 8 A 2 A Model Number example
1-2 General System Information
Page 9
September 2005
Unit Description The DewPro MMY31 trace moisture transmitter is a loop-powered
dewpoint measuring device. The transmitter includes a sensor
element, a stainless steel probe, a weather-proof enclosure,
microprocessor electronics, and assorted fittings, all in a compact
assembly. It is designed to be installed “in-line.” Various types of
mounting hardware, such as flange and compression fittings, are
available for mounting into a process chamber or pipe.
An optional display with user interface feature allows the DewPro to
be configured by the user. See Chapter 4 for more information.
Theory of Operation
4–20mA Loop The DewPro MMY31 microcontroller operated electronics works
with a voltage supply of 12 to 28 VDC. At the nominal 24 VDC
supply, the maximum loop resistance is 600 ohms. The signal is
represented by the 4–20 mA loop current and is directly proportional
to the dewpoint temperature range in °C or °F. In the standard range,
4 mA corresponts to –90°C (–130°F) and 20 mA to +10°C (+50°F)
dewpoint temperature. The optional unit of measure is ppm
standard range 0-100 ppm
, unless ordered differently
v
in the
v
Planar Sensor The heart of the MMY31 is the planar sensor element. It incorporates
a superior aluminum oxide sensor that provides longer calibration
stability, excellent corrosion resistance, and improved speed of
response. The sensor, mounted on a ceramic substrate, also has a
reduced temperature coefficient.
Calibration Each DewPro is factory calibrated against precise NIST certified
moisture references and has an accuracy of ±2°C dewpoint at 25°C
temperature. For field validation, GE Sensing offers a unique
validation device. The MMY245 field validator connects to the
DewPro on site and offers a one-point or two-point correction.
General System Information 1-3
Page 10
Chapter 2
Page 11
Installation
Mounting the MMY31 (cont.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Wiring Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Page 12
Mounting the MMY31 Caution!
Before installing the unit, please read all the instructions.
The MMY31 is designed to be mounted onto pressurized
systems. Take all the necessary precautions when
mounting or removing the unit.
Choose a mounting location which allows enough clearance for the
use of tools and for connection of the field validator. Figure 2-1 below
shows the dimensions of the standard MMY31.
5.43 (138)
September 2005
9.45
(240)
4.25
(108)
0.79 (20)
4.64 (118)*
*without display
Dimensions are in
inches (millimeters).
0.50 (12.7)
Figure 2-1: DewPro MMY31 Outline and Compression Fitting
Installation 2-1
Page 13
September 2005
Mounting the MMY31
(cont.)
Mount the MMY31 using a compression fitting connection. Be
certain that the tip of the probe does not touch the inside wall of the
pipe.
IMPORTANT: Ensure that your probe has a stainless steel ferrule,
which is required for use in pressurized systems.
Adjust the ferrule for a probe insertion length of 1” (minimum) and
tighten the compression fitting as follows (see Figure 2-2 below):
1. Hand-tighten the nut.
2. Then, using a wrench, tighten the nut 1½ turns. Now the fitting is
tight and can withstand pressure to 1750 psig (120 barg).
Minimum 1 in. (25 mm)
Figure 2-2: Mounting the MMY31
2-2 Installation
Page 14
Wiring Configurations Caution!
The DewPro system includes electronic components that
are susceptible to damage by static electricity. Use proper
handling procedures during the removal, installation, or
other handling of internal boards or devices.
Note: If the DewPro is equipped with an optional display/user
interface, please refer to Chapter 4.
Figure 2-3 below illustrates various power supplies and displays for
use with the DewPro MMY31.
24 VDC (12...28 VDC)
September 2005
’
Sensing
Sensing, such as Md102
Figure 2-3: System Configuration, Various
Designing the Loop When selecting a power supply, please note that the voltage at the +/-
terminal of the DewPro should not fall below 12 VDC. The maximum
loop resistance is an important measure for selection of the supply
voltage. Each device connected to the loop causes a voltage drop. For
instance, using a loop-powered display with an input impedance of
Ω will cause a voltage drop of 1 VDC at 20 mA, using Ohm's law.
50
Connecting the loop to a PLC will cause a voltage drop across the
input.
When designing your loop, add up all voltage losses across the
devices connected to the loop and add 12 V. The sum will be the
minimum supply voltage required from the power supply. Calculate
with a 20% safety factor.
Installation 2-3
Page 15
September 2005
In a Normal Environment A standard two-wire, stranded cable can be used in a normal
environment to interconnect the DewPro with the power source.
In Environments with Severe Electrical Noise
The DewPro MMY31 meets the EMC requirements of IEC 61326 for
equipment used in industrial locations. The MMY31 passed all tests
to the standards IEC 61000-4- to the performance criterion A. Test
details can be found in Chapter 5, Specifications.
Figure 2-4: Shielded Cable Wiring Diagram
2-4 Installation
Page 16
September 2005
General Wiring Instructions
To wire the DewPro MMY31:
1. Unscrew the cap on the terminal side of the unit (has a DewPro
label).
2. Loosen the cable gland located on the side of the unit.
3. Feed the cable through the conduit opening.
Note: Use a standard signal cable size.
4. Retighten the metal cable gland to meet IP 67 and to relieve any
stress on the wire.
5. Verify that a value between 12 and 28 VDC is across the terminals
marked + and –.
Note: This is the voltage that appears across the DewPro terminals,
not necessarily the power supply voltage due to voltage loss in
wire length, displays, indicators, etc.
6. In order to meet EMI/RFI immunity, a two-wire shielded cable
with a common foil shield layer is being used to power the
MMY31. Removing the insulation by 3 inches allows users to pull
back the foil, clamping it between the metal cable gland. The
ground wire must be connected to the internal grounding screw.
GND
LOOP 1
–+
Internal GND Connection
External GND/SHIELD Connection
–
24 VDC Nominal (12-28V)
+
Figure 2-5: Electrical Connections
Installation 2-5
Page 17
Chapter 3
Page 18
Troubleshooting
The Loop Current is Out of Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
There Is No Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Page 19
September 2005
The Loop Current is Out of Range
The loop current is outside the range of 4-20 mA, as shown on the
display or the current meter. For an example of error current at 22mA,
see below.
Solution The process dewpoint is out of range. If the dewpoint is above +10°C
(+50°F), the current will go to 22 mA. Apply dry air for 20 minutes.
If the dewpoint doesn't decrease, consult the factory.
If the dewpoint is below –90°C (–130°F), the current will go below
4 mA and then go to the error current, e.g. 22 mA. Expose the
DewPro to ambient air for several minutes. If the error remains, the
cause may be a defective sensor assembly or an electronics
malfunction. Consult the factory.
There Is No Current
Solution Check the voltage and polarity across +/- terminals with a DC
voltmeter. If the voltage is within 12-28 VDC, consult the factory.
Troubleshooting 3-1
Page 20
Chapter 4
Page 21
Optional Display/User Interface
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Programming Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Push Buttons - Special Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Matrix Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Page 22
September 2005
Installation If the DewPro is equipped with an optional display/user interface,
follow the procedure below to access the buttons.
S
e
n
s
i
n
g
Figure 4-1: Dewpro with Display
Removing the Display 1. Unscrew and remove the protective windowed lid from the
DewPro (as shown in Figure 4-1 above), exposing the display
module below. The buttons V, H, + and – are now accessible.
2. The display unit snaps onto the printed circuit board, resting on
four posts. When removing the display, push one post to the
outside, using a small screwdriver, and pull the display out.
3. Then unplug the display cable.
Optional Display/User Interface 4-1
Page 23
September 2005
Programming Matrix In the DewPro trace moisture transmitter with display option, a
matrix-style input is used for programming the unit of measure,
measuring range, error status of output, and output adjustment. For
users of other GE Sensing equipment, this matrix format may be
familiar. The following describes the features and usage of the
various matrix locations as they apply to the MMY31.
H
V
DewPro
Figure 4-2: Dewpro Display
The DewPro MMY31 display (see Figure 4-2 above) continuously
shows the current matrix location using the vertical (V) and horizontal
(H) coordinates to designate the row and column, respectively. The
bar graph represents the output current in an analogue fashion.
Movement through the matrix is accomplished by using the V and H
buttons to move to another row or column as shown in Table 4-1 on
page 4-3. For example, to select location VH 38 (beginning at
VH 00), successively press V (V1, V2, V3) and then successively
press H (H1, H2, H3, H4, H5, H6, H7, H8); thus arriving at VH 38.
At any location where a value may be changed by the user, the desired
value is programmed using the
changed is flashing.
+ and – buttons. The digit to be
+
–
4-2 Optional Display/User Interface
Page 24
Optional Display/User Interface 4-3
Table 4-1: Matrix Options
MMY31 H0 H1 H2 H3 H4 H5 H6 H7 H8 H9
Loop #1 at Fault
0 = –10%
1 = 110%
2 = Hold
Display Moisture
V0
V1
V2
Value
Dewpoint
°C 4 mA
Select Units
0 = °C
1 = °F
35 = ppm
Dewpoint
°C 20 mA
v
ppm
v
20 mA
V3
V4
V5
V6
V7
V8
V9
Pressure ppm
Constant (bar)
Current Error
Code
v
Previous Error
Code
Device ID
Software
Version
Set to Default
Values
50 = Set Default
Output
D/A Cal 4 mA
Output
D/A Cal 20mA
Input Locking
50 = Unlock
Reset Device
50 = Reset After
Calibration
September 2005
Page 25
September 2005
Push Buttons - Special Functions
Reset to “Normal” Display Pressing the V and H buttons simultaneously returns the user to
VH 00 (normal display).
Display Only Five (5) matrix locations are for display only and may not be changed
by the user (see Table 4-1 on page 4-3). The 'display only' fields are
as follows:
VH 00 Normal display (in dewpoint or ppmv).
VH 90 During a system alarm, displays the error code for the
fault encountered.
VH 91 During normal operation, displays the previous error
code for reference.
VH 92 Displays the factory issued identification number.
VH 93 Displays the factory-issued reference number
designating the device type and software version.
Default Values A default value is assigned to each programmable matrix field. The
values are present after a reset to factory programmed data has been
executed (see VH 95).
Changing Values When unlocked (VH89 = 50), values in certain matrix locations can
be changed using the + and – buttons. The changeable digit flashes.
4-4 Optional Display/User Interface
Page 26
September 2005
Matrix Functions This section describes the functions available to the user through the
matrix, grouped by common function areas (refer to Table 4-1 on
page 4-3). Each function is accessed by moving to its specified
location within the matrix.
Display and Output Mode
Table 4-2: Display and Output Mode Functions
Function Location Description
Dew Point
Display
Selecting the
Device Unit
VH 00
VH 01
This is the normal display of the transmitter when in operation. The
dewpoint is shown in °C or °F, or ppm
as selected under VH 01.
v
Selects units to be displayed. Changing from °C to °F does not change
the current loop. Changing from dewpoint to ppm
does change the
v
current loop.
Note: When switching to ppmv, the display may indicate an error “3”
if the dewpoint reading is above -20°C. (For example, the DewPro is
exposed to ambient air.)
Loop at Fault VH 07
Selecting the
Analog
Output Offset
(4 mA)
Selecting the
Analog
Output Span
(20 mA)
Setting the
Span Value
for the
ppm
Range
v
VH10
VH11
VH 12
If any fault malfunction occurs, the loop can be set to either “-10%”
(=3.6 mA), to “110%” (=22 mA) or “Hold” (stays at last valid value).
The dewpoint value corresponding to the analog output offset (4 mA)
is entered here. Default: –90°C
Caution: Ensure the dewpoint value in VH10 is always at least 20°C
below the value assigned to 20 mA.
The dewpoint value corresponding to the analog output span (20 mA)
is entered here. Default: +10°C.
Caution: Ensure the value in VH11 is always at least 20 °C above
the value assigned to 4 mA.
Selection of this field sets the span value for the ppm-v range.
Default: 100.
Note: The offset is always 0 ppm
. Do not exceed 1000 ppmv.
v
Optional Display/User Interface 4-5
Page 27
September 2005
Special Calibration
Table 4-3: Special Calibration Functions
Function Location Description
The process pressure constant is entered in bar (absolute), and is used
. The moisture unit ppmv is the ratio of water vapor
v
Adjusting the
Pressure
Constant
VH 30
to calculate ppm
pressure to the total process pressure and is, therefore, independent of
the process pressure. The reason is that when compressing a gas
(process pressure) all partial pressures increase by the same factor
(Dalton's Law).
The gold/aluminum oxide sensor is selective to water vapor pressure
monitoring a higher vapor pressure when the total pressure (process
pressure) increases. The formula utilized by the analyzer refers to the
total pressure of 1 bar. An elevated pressure of the process has to be
corrected by programming the actual process pressure in bars to the
matrix field VH 30.
The system should be designed to maintain a constant pressure, for
instance, by using a pressure regulator in a bypass system.
Hardware
Adjustment
of the
Current Loop
at 4 mA
Hardware
Adjustment
of the
Current Loop
at 20 mA
VH 38
VH 39
Default: 1 bar (absolute)
By connecting an ammeter in the loop, the correct current (4 mA) can
be adjusted by increasing or decreasing the displayed digits.
Note: If the matrix input is locked (VH89), the calibration values are
displayed but the current output is unaffected. To enable adjustments,
VH89 has to be unlocked by entering “50” into this field.
Selection of this field assists during calibration, generating a nominal
20 mA signal, but the actual value must be 21.92 mA, an overrange to a
dewpoint of 22°C. By connecting an ammeter in the loop, the correct
current (21.92 mA) can be adjusted by increasing or decreasing the
displayed digits.
Note: If the matrix input is locked (VH89), the calibration values are
displayed but the current output is unaffected. To enable adjustments,
VH89 has to be unlocked by entering “50” into this field.
4-6 Optional Display/User Interface
Page 28
Mode of Operation
Table 4-4: Mode of Operation Functions
Function Location Description
Any number other than “50” will lock the instrument settings from
Input Locking VH 89
Displaying
the Present
Error Code
VH 90
inadvertent or unauthorized changes. (The instrument is unlocked only
at “50.”)
In the event of a system fault, this field displays the diagnostic error
code for the fault encountered.
Error
Code Description
0 No error.
1 Dewpoint underrange. The current output has fallen below
the 4.00 mA point.
2 Dewpoint overrange. The current output has exceeded the
21.92 mA level.
3 The instrument is no longer reading between –90° and
–20°C dewpoint while in ppm
the internal vapor pressure table.
4 ppm
overrange. The current output has exceeded the 20 mA
v
level. Re-range the ppm
keep this error from occurring.
5 Sensor is shorted.
September 2005
mode and has fallen off of
v
upper scaling limit in V1H2 to
v
Displaying
the Previous
Error Code
Instrumentation
Identification
Number
Identification
Field
Set to Default
Values
Resetting the
Device
VH 91
VH 92
VH 93
VH 94
VH 99
6 Sensor is open.
When a system fault condition is cleared, the value of the error code is
stored in this location. That is, during normal operation, the most
recent error code is displayed for reference.
The instrumentation identification number should always read “100.”
This field indicates the software version (i.e., version 3.0 or higher).
This field sets all factory defaults.
Note: Anything that has been calibrated will not be reset.
The device is reset in this field by entering 50.
Note: Reset the device only after field calibration, using the MMY 245
validator.
Optional Display/User Interface 4-7
Page 29
Chapter 5
Page 30
Specifications
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Optional Onboard Display with User Interface . . . . . . . . . . . . . . . . . . . . . 5-2
EMI/RFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Page 31
Technical Specifications
September 2005
Sensing Element:
Measurement Range:
Recommended
Recalibration Cycle:
Calibration Accuracy:
Maximum Sensor
Relative Humidity:
Operating and Storage
Temperature:
Electronics Operating
Temperature Range:
Maximum Operating
Pressure:
Planar aluminum oxide sensor
–130° to +50°F (–90° to +10°C) dew point temperature. 0 to 10,
0 to 100, 0 to 1000 ppm
12 months, depending on the application
±3.6°F (±2°C) dew point at 77°F (25°C)
50% at dewpoint temperatures >32 °F (0°C)
–40° to +122°F (–40° to +50°C)
–40° to +185°F (–40° to +85°C)
1750 psig, (120 bar, 12 MPa)
(fully adjustable with integral display)
v
Helium Leak-Rate:
Output:
Filter Element:
Probe Tube:
Typical Probe Mounting:
Electronics:
Moisture Unit:
Power Supply:
Protection:
Weight:
<10–6 mbar l/s
4 to 20 mA loop-powered; 16 µA resolution
100 micron, sintered stainless steel
316 stainless steel, 1/2” (12.7 mm) diameter,
insertion length 2” (50 mm) to 3.5” (90 mm)
1/2” NPT-M, 3/4” NPT-M, 3/4”-16, or G 1/2 stainless steel
compression fitting on 1/2” (12.7 mm) tube
Microcontroller operated.
Dew point temperature in °C or °F, ppm
24 VDC nominal, 12 to 28 VDC range
Type 4X (IP 67)
3.3 lb (1.5 kg)
v
Specifications 5-1
Page 32
September 2005
Optional Certifications/
Approvals
Optional Onboard
Display with User
FM IS Cl. I, II, III, Div. 1, Grps. A-G, T5
FM XP-IS Cl. I, Div. 1, Grps. A-D, T5
FM NI Cl. I., Div. 2, Grps. A-D, T4A
DIP Cl. II, III, Div. 1, Grps. E-G, T5
ATEX II 3G EEx nA IIC T4
The optional onboard display with user interface uses a matrix
configurator for:
Interface
• range changes
• unit of measure selection
• current loop adjustment
• error diagnostics
• current value selection for fault conditions
• entering a pressure constant for ppm
EMI/RFI Performance Criterion A:
.
v
1. Conducted Emission Test as per CISPR 11 Class A, 2004
2. Radiated Emission Test as per CISPR 11 Class A, 2004
3. Radiated Susceptibility Test as per IEC 61000-4-3, 2002
4. Electrostatic Discharge Test as per IEC 61000-4-2, 2001
5. Electrical Fast Transient Test as per IEC 61000-4-4, 2004
6. High Energy Surge Immunity Test as per IEC 61000-4-5, 2001
7. Power Frequency Magnetic Field Test as per IEC 61000-4-8, 2001
EMC IEC 61326, Industrial Locations
5-2 Specifications
Page 33
GE Industrial
Sensing
We, GE Industrial, Sensing
1100 Technology Park Drive
Billerica, MA 01821
USA
declare under our sole responsibility that the
DewPro® MMR30 Moisture Transmitter Probe
®
DewPro
DewPro
DewPro
to which this declaration relates, are in conformity with the following standards:
• EN 61326:1997+A1+A2
®
MMY30 and MMY31 Dew Point Transmitters
®
MMR101 High-Temperature Moisture Transmitter
MMR31 Moisture Analyzer
DECLARATION
OF
CONFORMITY
following the provisions of the 89/336/EEC EMC Directive.
The
units listed above and any sensors and ancillary sample handling systems supplied with them
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.
September 16, 2005
Date of Issue Mr. Gary Kozinski
Certification & Standards, Lead Engineer
do not bear CE
CERT-DOC-H3 (August 2004)
Page 34
GE Industrial
Sensing
Nous, GE Industrial, Sensing
1100 Technology Park Drive
Billerica, MA 01821
USA
déclarons sous notre propre responsabilité que les
DECLARATION
DE
CONFORMITE
DewPro
DewPro
DewPro
rélatif á cette déclaration, sont en conformité avec les documents suivants:
• EN 61326:1997+A1+A2
suivant les régles de la Directive de Compatibilité Electromagnétique 89/336/EEC.
Les
matériels listés ci-dessus, ainsi que les capteurs et les systèmes d'échantillonnages pouvant être livrés avec
portent pas le marquage CE de la directive des équipements sous pression, car ils sont fournis en accord avec la
directive 97/23/EC des équipements sous pression pour les DN<25, Article 3, section 3 qui concerne les pratiques et
les codes de bonne fabrication pour l'ingénierie du son.
16 septembre 2005
Date d’émission Mr. Gary Kozinski
®
®
MMR30 Moisture Transmitter Probe
®
DewPro
®
MMY30 and MMY31 Dew Point Transmitters
MMR101 High-Temperature Moisture Transmitter
MMR31 Moisture Analyzer
Certification et normes, ingénieur de fil
ne
CERT-DOC-H3 (August 2004)
Page 35
GE Industrial
Sensing
Wir, GE Industrial, Sensing
1100 Technology Park Drive
Billerica, MA 01821
USA
erklären, in alleiniger Verantwortung, daß die Produkte
KONFORMITÄTS-
ERKLÄRUNG
DewPro
DewPro
DewPro
folgende Normen erfüllen:
• EN 61326:1997+A1+A2
gemäß den Europäischen Richtlinien, EMV-Richtlinie Nr.: 89/336/EG.
Die
oben aufgeführten Geräte und zugehörige, mitgelieferte Sensoren und Handhabungssysteme
CE-Kennzeichnung gemäß der Druckgeräte-Richtlinie, da sie in Übereinstimmung mit Artikel 3, Absatz 3 (gute
Ingenieurpraxis) der Druckgeräte-Richtlinie 97/23/EG für DN<25 geliefert werden.
16. September 2005
Außtellungsdatum Hr. Gary Kozinski
®
®
MMR30 Moisture Transmitter Probe
®
DewPro
®
MMY30 and MMY31 Dew Point Transmitters
MMR101 High-Temperature Moisture Transmitter
MMR31 Moisture Analyzer
Bescheinigung und Normen, Leitungsingenieur
tragen keine
CERT-DOC-H3 (August 2004)
Page 36
USA
1100 Technology Park Drive
Billerica, MA 01821-4111
Web: www.gesensing.com
Ireland
Shannon Industrial Estate
Shannon, County Clare
Ireland
Loading...