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GE DewPro MMY 245, Инструкция по установке и эксплуатации

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DewPro MMY245

 

Installation and Operation Manual

 

GE General Eastern                                                                                                                          

 

General Notes 

 

Attention! 

This is a portable moisture analyzer. The success and accuracy of moisture measurements and of field 
validation depends on the integrity of the care exercised in operating this equipment. All fittings and 
tubing should be tightened properly and examined prior to each use for thread or quick connect fitting 
damage, leaks or crimped hoses. If any damage is suspected, do not place the unit in service until the 
suspected damage is repaired. DO NOT alter or modify any of the supplied components. This will not 
only void the Warranty but could rupture components causing injury or death. Tampering with internal 
components will likely produce errors in the instrument readings. 
 
 
 
 

Caution! 

Before using or installing the DewPro

 MMY 245, please read all instructions. 

 
 
 
 
 

Safety! 

The DewPro

 MMY 245 Portable Moisture Analyzer is designed for connection to pressurized 

gaseous systems. Be certain to de-pressurize the system before connecting or disconnecting the hoses 
or fittings to the analyzer or at the process connection.

  

 
 
 
 
 
 
 

Disclaimer 

General Eastern Instruments, Inc. reserves the right to change or modify our products in appearance or performance specifications at any time 
and without notice. Therefore, information in this document is subject to change without notice and does not represent a commitment on the 
part of General Eastern Instruments, Inc. 
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and 
recording, for any purpose without the express written permission of General Eastern Instruments, Inc. 

 
Technical Assistance 

If you should have any questions regarding the product described in this document, or need further 
assistance, please contact your local General Eastern Instruments (GEI) representative or the factory at 
800-33HUMID (800-334-8643). When contacting the factory for technical support, please have your 
serial number ready. This number is located inside the unit and can be accessed by loosening the two 
knurled screws on the top of the unit. 

 

Serial Number: _______________________________

Содержание DewPro MMY 245

Страница 1: ...DewPro MMY245 Installation and Operation Manual GE General Eastern DewPro MMY 245 Portable Moisture Analyzer Installation and Operation Manual GE Measurement Sensing Technologies GE General Eastern ...

Страница 2: ...rize the system before connecting or disconnecting the hoses or fittings to the analyzer or at the process connection Disclaimer General Eastern Instruments Inc reserves the right to change or modify our products in appearance or performance specifications at any time and without notice Therefore information in this document is subject to change without notice and does not represent a commitment o...

Страница 3: ...___________________________________________________________7 Basic Operation ________________________________________________________________8 2 1 Operating Controls ______________________________________________________________8 2 2 Display Elements ________________________________________________________________8 2 3 Basic Sampling or Spot Checking _______________________________________________...

Страница 4: ...________________________________________________ 23 4 3 4 Closed Loop Connection ____________________________________________________________ 24 4 4 Field Validator Setup____________________________________________________________25 4 4 1 Matrix Orientation _________________________________________________________________ 25 4 4 2 Single Point Validation Function Guide_____________________________...

Страница 5: ...contact the factory immediately Product Structure 1 Certification R Standard Y Other 2 Pressure Compensation R Basic configuration P Pressure sensor built in for ppm compensation MMY245 Accessories Part No Description 63005033 Carrying case including shoulder strap 63005032 Shoulder strap 63004006 Cable assembly MMY 245 to DewPro MMY 30 RS485 cable 63004005 Connector cable assembly RS485 DewPro RS...

Страница 6: ...low Desiccant dried air Dried Natural Gas Argon gas for welding Nitrogen gas supplies Breathing air SF6 gas for switchgear Helium gas supplies Oxygen gas supplies Hydrogen cooling loops Instrument air Glove box gas purifier loops Ethylene Production Heat treating atmosphere generators Gas Bottle filling operations and many others The processes listed above often require many different units of mea...

Страница 7: ... alkaline batteries are included and are recommended for replacement The internal sample system provides for purging the hoses after they are connected to the sample tap and then directs the sample across the sensor 1 3 1 Sensor Theory The Planar Gold Aluminum Oxide sensor is a capacitance based technique for detecting the moisture content in gaseous samples This sensor is manufactured using semic...

Страница 8: ...3 4 1 Internal Construction All the wetted surfaces of the MMY 245 DewPro are electro polished non hygroscopic metal components of either stainless steel or anodized aluminum Introducing clean samples will prevent these surfaces from becoming contaminated 1 3 4 2 Avoid Liquid Samples Avoid ANY liquid exposure of the sample lines and the instrument Liquids will damage the unit and void the Warranty...

Страница 9: ... of time can move large amounts of moisture into the measurement cell and eventually cause the sensor to drift 1 3 4 9 Piping Recommendations Connection the MMY 245 to the process or sample tap in the proper manner will insure the most accurate measurements Connecting tubing should be made from materials that are non hygroscopic and capable of handling the sample pressure Keeping the length of con...

Страница 10: ...ll turn the unit on or off The HOME key will display the matrix position V0 H0 or alternately V4 H0 Pressing the V and H keys advances the vertical or horizontal position within the matrix and the display will show the contents of that position Pressing the and keys increments or decrements the value in the matrix cell described in the right side of the display These matrix and operating functions...

Страница 11: ...the connecting tubing for a few minutes WARNING If there is any evidence of aerosols or the presence of condensate in the exhaust DO NOT PROCEED The unit is designed for gaseous use only and any liquid droplets or aerosols will damage the desiccant chamber 3 Turn on the power by pressing the power switch 4 Rotate the handle to the measure position vertical 5 Observe the rate of change bar graph in...

Страница 12: ...t introduce samples at greater than the rated pressure of 150 psig 10 barg 2 Do not introduce samples of gases corrosive to aluminum or gold into the unit This will damage the sensor and will void the warranty 3 Do not introduce samples of known high moisture or samples saturated with water into the unit The sensor can be damaged and will not be covered under warranty Observe the outlet port to se...

Страница 13: ... 10 X 10 matrix contains all the operating parameters for properly displaying and calculating the correct value in the appropriate unit of measure The control functions for the outputs and interface connections are easily set by moving through this matrix and selecting the appropriate values for each cell The following section describes the features and usage of the various matrix locations as the...

Страница 14: ...V 2 hold Temperature A D V5 Scale Output 2 Opt Input Temp C 0 V Temp C 5 V bar 0 V bar 5 V Min Input Display Value Max Input Display Value Minimum Input Voltage Maximum Input Voltage Minimum Output Voltage Maximum Output Voltage V6 V7 Channel 2 Setup Output 2 Enable 0 Disable Output 2 D A Cal 0 V Output 2 D A Cal 5 V V8 Special Double Pt Dewcomp 1 begin Double Pt State 100 OK Single Pt DewComp 1 b...

Страница 15: ... Double Point State 100 ok V8 H3 Single Point State 100 ok V8 H5 Battery Capacity Remaining V9 H0 Display Primary Error Code V9 H1 Display Secondary Error Code V9 H2 Unit ID V9 H3 Software Version 2 5 3 Function Guide Using the Matrix refer to Figure 5 The matrix is organized in functional families by rows The following is a general description of these functional families indicating the row in wh...

Страница 16: ...led system reset performed using V9 H9 or unit of measure selection is changed V0 H3 Displays the highest moisture value measured since the unit was reset using V0 H4 new batteries were installed system reset performed using V9 H9 or unit of measure selection is changed V0 H4 Resets the event memories of V0 H2 and V0 H3 by pressing the button V0 H7 Fault status for output 1 is selected with 0 sett...

Страница 17: ...n error code is displayed enabling the user to identify any software errors when communicating to the factory technicians See the trouble shooting section for details V9 H1 The error preceding the current error displayed in V9 H0 is indicated enabling the user to identify any hardware errors when communicating to the factory technicians V9 H2 The instrument is identified by a series ID number that...

Страница 18: ...he displayed number can be increased or decreased using the and button to adjust the voltmeter reading to 0 V Value is around 500 This is factory calibrated V7 H9 Calibrates the output 2 hardware at 5 V connecting a voltmeter to the output the displayed number can be increased or decreased using the and button to adjust the voltmeter reading to 5 V Value is around 2500 This is factory calibrated 2...

Страница 19: ...ut resistance of at least 20 KΩ to provide 0 5 accuracy A higher input impedance is recommended for better signal accuracy These outputs are scaled and referenced to specific units of measure using V1 H0 through V2 H7 for output 1 and V5 H0 through V5 H4 for output 2 See the section 2 5 5 above titled 2 5 5 Special Output and Input Functions 3 Troubleshooting Field maintenance consists of keeping ...

Страница 20: ... Software errors V9 H0 Error Description 0 No Error 1 Dew point 100C 2 Dew point 20C 4 Voltage output on CH1 scaled to 0V 8 Voltage output on CH1 scaled to 5V 16 Temperature out of range 64 Voltage output on CH2 scaled to 0V 128 Voltage output on CH2 scaled to 5V An error indicating that the dew point is both 100C and 20C indicates that the output on CH1 cannot be calculated because of an error re...

Страница 21: ...n is to verify whether a permanently mounted transmitter is functioning properly and in calibration and if not then apply the correct data to the EEPROM to realign its reading Although factory recalibration of the MMY 245 analyzer is recommended every 6 12 months depending on use as a spot check instrument it should be recalibrated within 4 months prior to MMY 3 series transmitter field validation...

Страница 22: ...dition is indicated on the display that the unit is allowed another ten minutes to settle before continuing the validation procedure The two procedures are a single point validation that simply changes the EEPROM data to move the intercept of the curve and the two point validation that changes the slope and intercept The single point procedure is very brief requiring the sample readings of both de...

Страница 23: ...gular plastic tab see Figure 7 4 Plug the small connector into the black socket on the PC board Figure 7 enlarged view 5 Arrange the wires so they won t get pinched by the plastic tab and secure the tab in place with the captive screw 6 Reinstall the display for display versions and the enclosure cover The unit is now ready for connection to the MMY 245 The cable connection may remain installed in...

Страница 24: ...lidation If the orifice is at the outlet as in a model MMY 30R1A1A the setting for the pressure compensation in the MMY 245 must be set for proper pressure compensation In this case the sample pressure at the transmitter should be measured and noted for proper configuration of the validator If the orifice is at the inlet as in M N MMY 30R1B1A the setting for the pressure compensation in the MMY 24...

Страница 25: ... validation procedure can begin The validation process should be allowed to equilibrate for a minimum of 3 hours at vacuum with the operation handle in the vertical position for best results Reverse this procedure to disconnect the MMY 245 When using the MMY 245 as a validator with a MMY 31 or MMY 35 at either positive or negative pressures use the parallel connection technique that follows 4 3 3 ...

Страница 26: ...ted for proper configuration of the validator If the orifice is at the inlet as in M N MMY 30R1B1A there is no need to alter the setting for the pressure compensation in the MMY 245 Once the sample connection has been made the unit should be allowed to purge for at least 10 minutes to provide a true sample to the validator After purging the system the selected calibration may proceed by setting th...

Страница 27: ... at the sample dew point This new value represents a change in the intercept of the calibration curve only A two point calibration is performed in the same manner as in a single point validation with the additional step of monitoring a second moisture value generally that of the ambient air The MMY 245 values are assumed to be the field standard and are used to reprogram the EEPROM data in the tra...

Страница 28: ... 30 Calculating and reprogramming new values into the slave transmitter 100 Successful compensation confirmed 10 Compensation cancelled early 20 Communication error after 5 retries 30 Unrecognized slave transmitter type 4 4 3 Two point Validation Function Guide Performing a two point validation requires the operator to monitor the MMY 245 display as the validation steps are completed After complet...

Страница 29: ...de present Suspected errors in readings should be dealt with first by insuring all connections are leak free and the unit of measure is correctly set The pressure compensation mode should be verified that it is set correctly for the application After these items are verified to be correct and if the unit still produces questionable readings contact the factory field service department by calling 8...

Страница 30: ...puts Analog Output Two adjustable and assignable non I S 0 5 VDC Output range 100 C to 20 C adjustable Digital Interface RS 485 with proprietary protocol for calibration and communication to MMY 3 series loop powered transmitters Accuracy 2 C dew point temperature Measurement Range 100 to 20 C dew point temperature Options Pressure sensor Hose kit with quick connect fittings Carrying Case with sho...

Страница 31: ...DewPro MMY245 Installation and Operation Manual GE General Eastern 29 7 Appendix ...

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