Servomex NanoTrace DF-745SG Operator'S Manual Download Page 76

Page: 76 / 94

70 DF-745SG Service

5. Ensure that all internal components are adequately secured and put the

analyzer in its original container.

If the analyzer is being returned to the factory, call the nearest Servomex Business

office to obtain a

Return Material Authorization number

. Clearly mark the

Return Material Authorization number on the outside of the shipping container and

on the packing list.
The analyzer should be returned (freight prepaid) to:

Servomex Corporation
4 Constitution Way
Woburn, MA 01801-1087

9.5 Replaceable Parts List

When ordering parts, please be certain to supply the model number and serial

number of your analyzer.

PART NO.

PART DESCRIPTION

Printed Circuit Boards

210867

Moisture Board

211229

Front Display

Hardware Items

210431

VCR Gasket

210432

VCR Filter Gasket

211134

Fuse 6.3 Amps (110VAC)

211133

Fuse 3.15 Amps (220VAC)

211531

Power Cord – 110 VAC

210597

Linear Power Supply

210596

Switching Power Supply

211169

USB Memory Stick/Flash Drive

Table 6: Replaceable Parts List

Summary of Contents for NanoTrace DF-745SG

Page 1: ...NanoTrace Moisture Analyzer DF 745SG OPERATOR MANUAL ...

Page 2: ...trieval system or transmitted in any form or by any means including electronic mechanical photocopying recording or otherwise without prior written permission of Servomex Corporation NanoTrace Moisture Analyzer is a trademark of Servomex Corporation VCR is a registered trademark of the Cajon Company ...

Page 3: ... receive it The certificate of calibration assures your analyzer has been calibrated on gases that are traceable to NIST standards With proper maintenance your analyzer should remain calibrated for years For a fast and successful startup please read this manual carefully There are important cautions and a number of helpful hints to help you to optimize the operation of your analyzer For more infor...

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Page 5: ...ransit 5 The analyzer is set at the factory to operate on 120 VAC or 240 VAC Examine the voltage indicator on the rear panel to verify that the voltage is set as ordered 6 Save the original container in the event you may need to ship the analyzer to another location or back to the factory see Shipping in the Service section Installation and Maintenance The NanoTrace Moisture Analyzer provides year...

Page 6: ... exhaustively tests and supports every analyzer under the tightest quality controls You should expect every Servomex analyzer to arrive in perfect working order and with good maintenance provide years of trouble free service Please call your nearest Servomex Business Center if you need assistance ...

Page 7: ...ngs 18 4 2 3 Download System Data 19 4 3 Analyzer Shut Down 19 5 Options 23 5 1 Key Lock 23 5 2 Operating Voltage 23 5 3 Serial Communications 23 5 4 Analog Voltage Output 23 5 5 Hydrogen Service Safety System 23 6 Connecting to External Devices 25 6 1 Serial Communication Port J5 25 6 2 Analog Signal Outputs J4 26 6 3 4 20 mA Outputs J4 26 6 4 Relay Ports J8 J9 27 7 User Interface 29 7 1 Data Dis...

Page 8: ...d Flow Rate 67 8 4 Flammable Sample Gas 67 9 Service 69 9 1 Return Material Authorization number 69 9 2 Maintenance 69 9 2 1 Storage Conditions 69 9 2 2 Moisture Cell Maintenance 69 9 3 Troubleshooting the DF 745SG NanoTrace Analyzer 69 9 4 Shipping 69 9 5 Replaceable Parts List 70 10 Theory of Operation 71 10 1 The Moisture Measurement 71 10 1 1 Moisture and the IR Spectrum 71 10 1 2 Absorption S...

Page 9: ...te Warning 37 Figure 21 Restore Sample Gas Flow 37 Figure 22 Calibrate Menu 38 Figure 23 Check Adjust Zero Menu 38 Figure 24 Check Adjust Zero Screen 39 Figure 25 User Zero Offset 39 Figure 26 Manual Zero Screen 40 Figure 27 Data History Menu 41 Figure 28 Data History Screen 41 Figure 29 Install Media 42 Figure 30 Example of Data Download 42 Figure 31 Data Downloader Menu 42 Figure 32 Data Downloa...

Page 10: ...2 Signal Monitor Menu 59 Figure 63 Signal Monitor Screen 59 Figure 64 Fan Failure Alarm 60 Figure 65 Power Up Default Menu 60 Figure 66 Power Up Default Screen 60 Figure 67 Date Time Menu 61 Figure 68 Date Time Setup Screen 62 Figure 69 Communications Menu 62 Figure 70 Communications Setup Screen 62 Figure 71 Download System Data Menu 63 Figure 72 Insert Media 63 Figure 73 Media Warning 63 Figure ...

Page 11: ...e 1 Pin out of Serial Comm Connector J5 26 Table 2 Serial Communications Connections 26 Table 3 Pin Out of Moisture Signal Output Connector J4 27 Table 4 Pin Out of Relay Connectors J8 and J9 27 Table 5 Alarm Codes 49 Table 6 Replaceable Parts List 70 ...

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Page 13: ...t be responsible for direct or consequential damages that result from using the analyzer with these gases 2 1 Symbols and Explanations Following is a list of the various symbols used throughout this manual and their definitions CAUTION This symbol alerts the user to the presence of physically hazardous conditions that may be dangerous to individuals or equipment NOTE This symbol alerts the user to...

Page 14: ...nd as specified in this manual EMI DISCLAIMER This Analyzer generates and uses small amounts of radio frequency energy There is no guarantee that interference to radio or television signals will not occur in a particular installation If interference is experienced turn off the analyzer If the interference disappears try one or more of the following methods to correct the problem Reorient the recei...

Page 15: ...m Background Gas Compatibility All inert and passive gases including N2 H2 He Ar O2 CO CO2 SF6 Xe Ne Kr N2O 3 2 General Warranty One year from ship date on the entire instrument See Warranty section on page 75 Power Requirements 100 to 120 VAC 50 60 Hz standard 5 Amps 200 to 240 VAC 50 60 Hz optional 2 5 Amps Display 7 4 inch VGA Color 640X480 Ambient Operating Temperature 10 C to 40 C 50 F to 105...

Page 16: ...e alarms or to moisture calibration in process indicator SPDT contacts rated at 1 Amp 30 VDC Fail safe action upon loss of power to alarm condition Not designed to switch AC power Storage Temperature Not to exceed 50 C 122 F Construction NEMA 1 19 inch rack mount Dimensions 19 inch 48 3cm wide x 10 5 inch 26 7 cm high x 22 5 inch 57 2 cm deep Weight 70 pounds 31 8 kg Gas Path Construction Material...

Page 17: ...176 28 19 00 482 60 7 83 198 90 7 71 195 77 19 00 482 60 18 31 465 12 1 49 37 72 34 8 74 7 50 190 50 10 47 265 94 5 5 RLY4 COM RLY2 COM RLY1 COM RLY1 NO RLY1 NC KEY 4 4 RLY3 NC 1 2 3 KEY 3 2 1 RLY3 COM RLY3 NO RLY2 NO RLY2 NC GND 8 6 7 GND 8 7 6 RLY4 NO RLY4 NC RX TX 3 3 1 2 1 2 4 20mA 4 20mA TX GND RX KEY 8 7 6 4 5 KEY GND 8 7 6 4 5 AOUT AOUT Enter Next Menu ESC Figure 1 Overall View ...

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Page 19: ...fitting Connecting the sample gas line to the analyzer inlet fitting Making the power connection to the analyzer POWER SWITCH USB PORT H O SENSOR 2 Figure 2 Major Internal Components 4 1 Analyzer Installation 4 1 1 Pneumatic Pressure Line Connection Optional The pneumatic gas connection required for the optional gas panel is a 1 8 inch compression fitting as shown in Figure 4 and requires 70 125 p...

Page 20: ...control valves will automatically go to a state as determined by the user See the section on Power Up Defaults on page 60 for additional information NOTE When received from the factory if equipped with internal gas valves the moisture cell will be isolated with pressure in the system See the sections on Moisture Gas Valves Control on pages 37 for instructions on starting the gas flow through eithe...

Page 21: ... INLET NOT USED PNEUMATIC GAS INLET REGULATOR ADJUST BYPASS FLOW ADJUST BYPASS OUTLET Figure 4 Rear Gas Connections and Controls with Optional Gas Panel 4 1 3 Electrical Connections Open the door and locate the power switch in the center of the upper rail Be sure it is in the OFF position Plug the line cord supplied with 110VAC units only into the receptacle at the back of the analyzer Verify the ...

Page 22: ...the box 5 5 RLY4 COM RLY2 COM RLY1 COM RLY1 NO RLY1 NC KEY 4 4 RLY3 NC 1 2 3 KEY 3 2 1 RLY3 COM RLY3 NO RLY2 NO RLY2 NC GND 8 6 7 GND 8 7 6 RLY4 NO RLY4 NC RX TX 3 3 1 2 1 AC INLET NOT USED 2 4 20mA 4 20mA TX GND RX KEY 8 7 6 4 5 KEY GND 8 7 6 4 5 AOUT AOUT STANDARD GAS PANEL SHOWN Figure 5 AC Power Connections RLY4 NC RLY4 NO GND RLY3 NO RLY3 COM KEY RLY3 NC RLY4 COM 7 8 NOT USED RLY2 NO KEY RLY1...

Page 23: ...s shown are only representative During the Warm Up process the gas valves if equipped can be opened and gas flow started See the section on Gas Pressure and Flow Settings on page 18 for important information on the gas delivery system and setting proper pressures and flow rates NOTE During the warm up period all analog and digital outputs are held to an artificial 0 011ppb reading to avoid the rep...

Page 24: ...with a Hydrogen Safety System no flow will enter the system until the unit is on power 2 For a basic analyzer with no cell isolation valves installed a simply provide sufficient pressure 5 30 psi resulting in a flow of 1 slpm 2 scfh as indicated on the flow meter located behind the front door NOTE The flow rate will directly impact the overall system speed of response b Go to step 5 3 For analyzer...

Page 25: ...nd restart the analyzer can be accomplished by simply shutting off the power switch behind the front door This action initiates the standard isolation process for analyzers equipped with gas control valves and computer shut down which takes approximately 40 seconds Long Term Shut Down For analyzers with gas control valves from the Main Menu go to System and select Isolate Analyzer A routine automa...

Page 26: ...le preferences at the time of power up Loss of power will result in automatic valve closure and the following restoration of power will result in the Scan Disk function occurring before system start up H O 2 PROCESS INLET REAR PANEL FLOW METER FRONT PI 010 ORIFICE MOISTURE SENSOR OUTLET Figure 8 Block Diagram of Gas Flow Path ...

Page 27: ...H O 2 REGULATOR ADJUSTMENT PROCESS INLET BYPASS OUTLET BYPASS FLOWMETER BYPASS FLOW ADJUST FLOW METER REAR PANEL FLOWSWITCH FRONT REAR PI 010 ORIFICE V1 V2 MOISTURE SENSOR OUTLET Figure 9 Block Diagram of Gas Flow Path with Optional Isolation Valves ...

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Page 29: ...C or 200 240 Volts AC The operating voltage is not adjustable in the field 5 3 Serial Communications The analyzer can be set for communications by RS 232 or RS 485 The serial communications option is not adjustable in the field See page 25 62 and 64 for additional information 5 4 Analog Voltage Output The maximum analog voltage output can be set at the factory for 0 1 0 2 0 5 or 0 10 Volts DC The ...

Page 30: ...24 DF 745SG Options ...

Page 31: ...n artificial 0 011ppb reading to avoid the reporting of false readings J9 J2 J3 J10 J5 J4 SERIAL COMMUNICATION MOISTURE ANALOG OUTPUT RELAY OUTPUTS NOT USED NOT USED J8 Figure 10 Rear Panel Electrical Connectors 6 1 Serial Communication Port J5 Either of two serial communication ports are available at the time of order RS232C or RS485 which enable interface between the analyzer and other operating...

Page 32: ...s Connections 6 2 Analog Signal Outputs J4 The analog voltage output correlating to the front panel display reading is provided on the rear of the analyzer through connector J4 The full scale voltage is set at the factory at the time of order to 0 to 1 VDC 0 to 2 VDC 0 to 5 VDC or 0 to 10 VDC The output is electrically isolated from all other analyzer outputs and from chassis Earth ground See page...

Page 33: ...rough the user interface for up to four moisture levels temperature moisture cell diagnostics zero calibration in progress analyzer off line freeze of analog outputs during calibration Pin Moisture Relay Description J8 8 GND Ground J8 7 RLY2 NC Relay 2 Normally Closed J8 6 RLY2 NO Relay 2 Normally Open J8 5 RLY2 COM Relay 2 Common J8 4 RLY1 NC Relay 1 Normally Closed J8 3 RLY1 NO Relay 1 Normally ...

Page 34: ... The relays are wired for Fail Safe operation such that a Normally Open No alarm contact connects to common when an alarm occurs or when power to the instrument is lost The relay wiring can be tested with the Relay test routine found on page 55 ...

Page 35: ... the large number display This box will also provide indication of abnormal operating conditions for each sensor A strip chart history of concentration measurements A ppb output range for the analog outputs as designated by the user Background gas as set by the user The digital readout of moisture concentration will be over written with a warning if any of the four moisture level or system alarms ...

Page 36: ...e boxes from the menu denoted by the sequence next to the menu text It will also enter numerical values within dialogue boxes The Next key allows the user to change between active inputs within a dialogue box The down arrow key will also accomplish this activity The ESC key allows the user to exit numerical entry boxes within dialogue boxes without any user changes dialogue boxes without any user ...

Page 37: ...nd as a result the item is not available Figure 14 Main Menu without isolation valve option 7 4 1 745SG GSF Figure 15 745SG GSF The Gas Scale Factor GSF editor is used to define a new gas mixture for analysis or to access a predefined mixture template for analysis To access the GSF Editor Screen from the Data Display screen press the Menu key on the front keypad When the menu appears as shown in F...

Page 38: ...he screens will toggle between Supported Gases and Template Note that the red arrow key in the upper left part of the screen is displayed only when the top item is selected in the Supported Gases or Templates screen To navigate to different areas on a screen tables and buttons use the Next key on the front keypad 7 4 1 1 Supported Gases Display Specifying a Mixture Figure 16 GSF Supported Gases Di...

Page 39: ...and shown as light gray 5 Balance Update feature Any gas left as 0 can be automatically set by the analyzer using the Balance Update feature as a convenience to the user a For a single gas the Balance Update will calculate the required to make the sum of all gases equal to 100 b If the percentage of two or more gases are not specified the Balance Update feature will calculate equal values for each...

Page 40: ...es by following steps 1 4 in section 7 4 1 1 1 and then define the percentages of each gas by following steps 1 4 in section 7 4 1 1 2 2 Use the Next key to navigate to Balance Update button and hit Enter 3 Name the new template by activating the soft keyboard shown in Figure 18 by hitting the up arrow when a The arrow to the left of the Balance Update button is red b The Balance Update button is ...

Page 41: ... new template 2 Use the Right arrow key to select a particular template Selecting a template populates the Sample Gas Mixture table in the Supported Gases display 3 When the proper template has been selected use the Next key to navigate to the Accept Mixture button and press Enter 4 The template values gases can be used as defined or can be modified for use as a special mixture The later is accomp...

Page 42: ...dited template but not rename it navigate with the Next key to the Accept button and hit enter 7 4 1 2 4 Deleting an existing template 1 The GSF Template screen displays available user defined templates up to 30 are allowed Use the Up and Down arrow keys to highlight a template from the list and to display the recipe gases percentages in the table to the right of the template list 2 Use the Left a...

Page 43: ...easurements instrumental drift has minimal effect on the quantitative moisture content result Once operating parameters are in place from the factory no other SPAN calibration is necessary However line contributions to offsets in ppb measurements especially at the sub ppb level are difficult to remove even with a correctly operating system The moisture analyzer has an array of zeroing features tha...

Page 44: ...t at the factory The zero reference of an instrument from the factory will be 0 00 After a manual or auto zero is performed this value may change slightly If the moisture cell has been previously calibrated by the user Restore Factory Zero will be enabled on this screen Enacting this will erase any user zero and restore the factory set point The User Zero Offset and Active Zero Offset are two mech...

Page 45: ...aseline drift below the calibrated zero point The value does not affect zero calibration it is simply added to the calibrated zero For example an offset of 1 0 ppb could be put into a system reading 0 0 ppb to allow a chart recorder attached to the output to read slightly above zero Under this condition the moisture reading would be 1 0 ppb Use the arrow keys and to highlight Enter User Zero Offse...

Page 46: ...s of doing a zero action can take many hours before the reading is at baseline A premature zero although acceptable will ultimately result in a negative reading as the plumbing and analyzer continue to dry out requiring another zero action See the section on Active Zero on page 55 for additional information After selecting Do a Manual Zero a screen will appear which displays a trace of the recent ...

Page 47: ... user to see the data history displayed in strip chart form on the front display By default the data history screen displays data for the most recent 24 hour period sampled at 1 point per minute fixed and the y axis is auto scaling The Next button can be used to toggle the X axis from 1 day default to 1 hour to 1 week and then to 3 weeks The Next button can also toggle the cursor to the max and mi...

Page 48: ...up to 15 seconds and the display will indicate downloading is in progress Once the download is complete control of the analyzer is returned to the operator See Figure 30 for an example of a portion of a download taken between the dates of May 1 and May 22 The complete file covers three full weeks Figure 29 Install Media Firmware version 0 6 1 Serial ND 10016 Model DF 745SGSG Start time 05 01 2003 ...

Page 49: ...is used to choose a location from a list of existing locations previously entered into the system see Add Location on page 44 On the Moisture Data Downloader screen Figure 32 use the Next key to move to the list of existing names and then use the arrow keys and to select the location desired Then use the Next key to move to Set Location and press Enter to accept the new location The action of sett...

Page 50: ...gs up the keyboard shown in Figure 34 that is used to enter the name of the new location Figure 34 Keyboard Display Use the arrow keys and to navigate the keyboard and use the Enter key to accept each character If an error is made use the Next key to move to the Clear Entry key and hit enter When the location name is complete use the Next key to move the highlight to Accept New Location and hit En...

Page 51: ...on 7 4 7 View Logs Menu View Logs allows the user to easily access past events that may be connected with past operational changes e g zero or instrument upsets Use the arrow keys and to scroll up and down through the list Pressing ESC will return to the main display Figure 36 View Logs Menu 7 4 7 1 Zero Log Figure 37 View Zero Log Menu ...

Page 52: ...e are also noted Figure 38 Zero Log Screen 7 4 7 2 System Error Code Log Figure 39 View System Error Code Log Menu The System Error Log reports functional errors in the moisture system If the error persists for more than 30 minutes the code is displayed if warranted In addition a system alarm will trip if configured to do so See page 51 for additional information on setting System Alarms NOTE The ...

Page 53: ...rious codes if one should appear on the screen Figure 40 System Error Code Screen 7 4 7 3 GSF Log Figure 41 GSF Log Menu When a new gas mixture is accepted either by manual entry or by use of a template the action is recorded in the GSF log as shown in Figure 42 The GSF setup is saved in a tab delimited line in the monthly log file consisting of date time ppb template gas1 gas2 reference ...

Page 54: ...ut setup and Graph setup Use the arrow keys and to scroll up and down through the list Pressing ESC will return to the main display information 7 4 8 1 Alarm Setup The moisture analyzer includes a total of seven alarms The four moisture concentration alarms can be user controlled to activate up to four optional relays High and low setpoints as well as deadbands are user set ...

Page 55: ...re level readout if an alarm condition exists To acknowledge the alarm simply hit the Enter button and its number or letter will appear in the Alarm Status line above the display See Figure 11 This action will not clear the alarm Only restoration of the condition that existed prior to the alarm will clear the alarm Following is a list of alarm code abbreviations that can appear in the Status Line ...

Page 56: ... from the nominal setpoint that the output value must exceed before an alarm is reset The Relay Assignment indicates to which relay the alarm is assigned Use the Next key to move from between fields and use the arrow keys and to change the highlighted selections and to enter numerical values When done use the Next key to move to the Accept button and hit the Enter key to return to the main display...

Page 57: ...gas path and the result is displayed on the front panel If enabled on the Pressure Alarm Setup screen an alarm can be assigned to trip if the pressure exceeds preset limits The user may assign the pressure alarm to one of four relays The limits are not user adjustable but are set automatically on the basis of the background gases entered in the GSF screen Use the Next key to move from between fiel...

Page 58: ... Menu The Zero Point corresponds to the lowest voltage or current output 0 VDC 4 mA that is sent to a recorder while the Full Scale corresponds to the maximum voltage or current output 1 5 10 VDC or 20mA that is sent The Full Scale set point FS is set from 1 0 ppm to 100 00 ppm Three ranges can be entered in this screen The range of the primary Full Scale FS must be less than that of the Expanded ...

Page 59: ...s the option to freeze the analog output or enable the analog output to update as the calibration progresses 7 4 10 Graph Setup Figure 51 Graph Setup Menu The graph setup is used to adjust the time scale on the main data display of the analyzer A specific time interval in minutes can be chosen for the X axis on that display The minimum acceptable time is 3 minutes The information on the display re...

Page 60: ...e arrow keys and to change the highlighted selections and to enter numerical values When done use the Next key to move to the Accept button and hit the Enter key to return to the main display Using the ESC key at anytime will exit the screen making no changes and return to the main display Adjustments to the GSE screen will result in a warning as shown in Figure 54 indicating the need to reset the...

Page 61: ...ure 56 Diagnostics Menu 7 4 12 1 Active Zero On Off The Active Zero Offset feature is designed to automatically compensate for the analyzer s gradual zero baseline cleanup This gradual cleanup is natural and occurs after a fresh startup or after a prolonged or abnormally high moisture exposure This feature ensures that accurate low ppb H2O readings can be made as soon as possible after initial sta...

Page 62: ...reset to 0 00 ppb and then automatically increments again as needed The Active Zero Offset is designed to operate when the zero baseline is falling at a rate less than 0 1 ppb hr as would be the case after 1 2 weeks of initial operation If user calibrations are performed sooner the H2O readings may be decreasing too rapidly for the Active Zero Offset feature to operate properly and negative H2O re...

Page 63: ...hen used to move to the Activate Deactivate field where the arrow keys and are used to toggle between the two options The NEXT key is then used to move to the Apply field where the Enter key is hit to change the relay state This process can be repeated as often as needed When done the NEXT key is used to move to the Done field and the Enter key is hit to leave the screen The condition of the relay...

Page 64: ...s hit to set the analog output to the selected value The analog output response should match the value that was entered For example if 80 percent is entered for the percent full scale level and the analog output is set for 0 to 10 VDC the analog output is 8 000 VDC This process can be repeated as often as needed When done the NEXT key is used to move to the Done field and the Enter key is hit to l...

Page 65: ...creen 7 4 12 5 Fan Failure The analyzer constantly monitors the condition of the cabinet exhaust fans If a problem is detected a system error 191 Fan Failure is reported over the moisture display In addition if hydrogen is entered as a gas in the GSF Setup and the system detects a failure in the exhaust fan circuitry the entire analyzer will automatically isolate A message of Fan Failure as shown ...

Page 66: ...terface Figure 64 Fan Failure Alarm 7 4 13 Power Up Default Optional Figure 65 Power Up Default Menu This menu item is only available on analyzers equipped with the isolation valve option Figure 66 Power Up Default Screen ...

Page 67: ...rror 20006 the power up defaults if applicable are ignored and the analyzer returns to the mode of operation found immediately before the error This reboot action is identified in the system error log as an error 222 See page 46 for additional information on system error codes 7 4 14 Date Time Figure 67 Date Time Menu The Date Time Screen is used to set various calendar and clock related parameter...

Page 68: ...etup Screen 7 4 15 Communications Figure 69 Communications Menu Figure 70 Communications Setup Screen The Communications screen is used to set parameters related to serial PC communications Accessed from the System menu the Next key is used to moved ...

Page 69: ...n the event that problems develop with the analyzer the contents of the internal system data files can easily be downloaded to a USB memory stick and the files can either be mailed or e mailed to Servomex for evaluation Install a memory stick into the external USB socket located behind the front door and on the left side of the analyzer After hitting Enter from the Download System Data menu Figure...

Page 70: ...to the user If there is insufficient space available on the media a warning will appear as in Figure 73 Figure 74 Download Time Line The file name is automatically created and includes the date and time that the data was recorded as well as the serial number of the analyzer All files are then automatically compressed and loaded as one file on the memory stick which then can be used to forward the ...

Page 71: ...g the Next key will bring up the Firmware Upgrade dialog box as in Figure 77 below Figure 77 Software Upgrade Screen Place the USB memory stick in the external USB socket located behind the front door When ready hit the Yes Proceed key and follow the instructions At the conclusion of the upgrade the analyzer will automatically reboot ...

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Page 73: ... is not accurate The bypass loop flowmeter mounted on the rear of the DF 700 series Moisture Analyzer is calibrated for use in air or N2 Most other gases have molecular weights within 25 percent of air Since the required flow rate is not extremely critical most gases produces reasonably correct readings The exceptions are light gases such as Helium and Hydrogen whose flow rates should be set to ap...

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Page 75: ...hooting the DF 745SG NanoTrace Analyzer The DF 700 series moisture analyzer constantly performs internal monitoring of the analyzer operation In the event of a failure a system alarm will be displayed on the front panel In addition the failure will be logged in the System Error Log see page 46 In the event of a system alarm contact Servomex with information as displayed in the log as well as on th...

Page 76: ... analyzer should be returned freight prepaid to Servomex Corporation 4 Constitution Way Woburn MA 01801 1087 9 5 Replaceable Parts List When ordering parts please be certain to supply the model number and serial number of your analyzer PART NO PART DESCRIPTION Printed Circuit Boards 210867 Moisture Board 211229 Front Display Hardware Items 210431 VCR Gasket 210432 VCR Filter Gasket 211134 Fuse 6 3...

Page 77: ...ith a particular wavelength impinges on a substance that absorbs a fraction of the total electromagnetic radiation The wavelength of radiation is well known for instance in differentiating colors in the visible light spectrum In the infrared spectral region the wavelength of light overlaps with discrete absorptions created by molecular vibrations IR absorption is often used in diagnosing molecular...

Page 78: ...s embodiment a solution with a broad absorbance band is dialed to a wavelength within the band where a substances molar absorptivity is known and the concentration of that substance is determined The substance is usually a liquid solution placed in a 1 cm cuvette and the concentration is expressed in moles liter This same Law can have units reassigned to determine absolute numbers of molecules per...

Page 79: ...ower source until all signal and plumbing connections are made CAUTION This analyzer must be operated in a manner consistent with its intended use and as specified in this manual EMI DISCLAIMER This Analyzer generates and uses small amounts of radio frequency energy There is no guarantee that interference to radio or television signals will not occur in a particular installation If interference is...

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Page 81: ...y if i the items are used solely under the operating conditions and in the manner recommended in the Seller s instruction manual specifications or other literature ii the items have not been misused or abused in any manner or repairs attempted thereon iii written notice of the failure within the warranty period is forwarded to the Seller and the directions received for properly identifying items r...

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Page 83: ...re 53 Download System Data 63 E Electrical Connections 15 Error Codes 46 External Devices Connecting to 4 20mA Outputs 27 Analog Signal Outputs 26 Relay Ports 27 Serial Communications 25 External Devices Connecting to 25 F Fan Failure 59 Fan Failure Alarm 59 Firmware Upgrade 65 G Gas Flow and Pressure Regulation 18 Gas Scale Factor GSF 67 Graph Setup 53 H Hydrogen Service 83 Hydrogen Service Safet...

Page 84: ...ility 67 Sample GSF 67 Sample GSF 67 Serial Communications 23 Service 69 Maintenance Storage Conditions 69 Replaceable Parts List 70 Return Material Authorization number 69 Shipping Return Material Authorization number 70 Set Location 43 Signal Monitor 59 Specifications 9 System Error Codes 46 System Info 64 T Test Analog Voltage Output 58 Test Relays 57 Theory of Moisture Measurement 71 U User In...

Page 85: ...Appendix A User Menu Screens DF 745SG 79 14 Appendix A User Menu Screens Page 31 Page 36 Page 37 Page 38 Page 41 Page 42 Page 45 Page 46 ...

Page 86: ...80 DF 745SG Appendix A User Menu Screens Page 47 Page 49 Page 52 Page 53 Page 55 Page 56 ...

Page 87: ...Appendix A User Menu Screens DF 745SG 81 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 ...

Page 88: ...82 DF 745SG Appendix A User Menu Screens ...

Page 89: ...s flow of sample gas from entering the instrument chassis under various conditions as described below It consists of a normally closed pneumatically actuated UHP springless diaphragm valve positioned on the sample inlet bulkhead Analyzer case purge valve introduces nitrogen purge flow into the chassis upon closure of the sample delivery interlock valve It consists of a normally open pneumatically ...

Page 90: ...ase purge valve is closed NOTE The back flow prevention screen will be displayed and the user must hit ESC to acknowledge the screen and remove it After approx 5 minutes the Warming Up indication will disappear and the user is then free to open the internal inlet and outlet valves to the moisture cell On analyzer shut down or in the event of a power failure or fan failure the moisture cell is auto...

Page 91: ... impede air flow at the inlet in the front door or at the exhaust fan outlets on either side of the cabinet in the rear NOTES 1 For hydrogen which has a lower explosive limit LEL of 4 the maximum allowable influx in event of an internal leak would be 120 scfh whereas the normal flow as defined in the Operating Instruction Manual is about 1 10th that at approximately 14 scfh 2 Use of the analyzer c...

Page 92: ...Service Safety System CASE PURGE VALVE WITH 1 4 COMPRESSION FITTING SAMPLE DELIVERY INTERLOCK VALVE WITH 1 4 FEMALE VCR FITTING 3 27 82 93 3 07 77 98 5 44 138 24 54 13 70 1 18 29 85 3 07 77 85 Figure 79 Hydrogen Service Safety System ...

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Page 94: ... 2552 EUROPE Europe and Africa Tel 31 0 79 330 1580 Fax 31 0 79 342 0819 Toll Free 00800 7378 6639 LATIN AMERICA MEXICO Tel 55 11 5188 8166 Fax 55 11 5188 8169 ASIA PACIFIC Tel 86 0 21 6489 7570 Fax 86 0 21 6442 6498 SYSTEMS ENGINEERING CENTERS Crowborough UK Tel 44 0 1892 652181 Houston USA Tel 1 281 295 5800 Shanghai China Tel 86 0 21 6489 7570 Mumbai India Tel 91 22 39342700 Servomex Group Limi...

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