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Gow-Mac 5900 Series, Operating Manual

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Gow-Mac 5900 Series Operating Manual Download Page 14

GOW-MAC  Instrument  Co.                   

14

Gas

Purifier

C

A

R

R

I

E

R

G

A

S

Helium

New  High

Purity  Regulator

100

psig

P

U

R

G

E

G

A

S

Helium

80psig

S

A

M

P

L

E

G

A

S

15

psig

FIGURE 3.4

3.10  Carrier Gas Purity

     The SERIES 5900 DID GC is an instrument which can deter mine impurities in helium  

   at the part-per-billion level. However, in order to reach this level of sensitivity, 

 

   EXTREME

 care must be taken to ensure that there are no leaks in the system and  

   that the carrier gas is as pure as can possibly be. 

     If for some reason the carrier gas is not as pure as the sample gas, negative peaks   

   can occur for gases which are in lower concentration in the sample gas. By using a 

   carrier gas purifier (GOW-MAC Model 75-800) in the helium line, instrument grade   

   helium can be purified to a level cleaner than chromatographic grade helium.

              

NOTE

IT IS HIGHLY RECOMMENDED THAT IF A PURIFIER WAS PURCHASED, THE 

OPERATOR READ THE GAS PURIFIER OPERATING INSTRUCTIONS.

 

To prevent low level impurities from appearing in the baseline, the purifier must be    

 

heated. Refer to the manufacturer’s instructions.

3.11  Purge/Actuator Gas Adjustment

NOTE 

ACTUATORS REQUIRE 40 TO 50 PSIG TO OPERATE. MAKE SURE THIS  

PRESSURE IS SUPPLIED AT THE ‘PURGE/ACT. HE’ GAS CONNECTION  

ON THE BACK OF THE INSTRUMENT.

Summary of Contents for 5900 Series

Page 1: ...0 Discharge Ionization Detector Gas Chromatograph Series 5900 105 125 VAC 60 Hz Series 5902 200 240 VAC 50 Hz October 2019 Rev 1 READ INSTRUCTIONS BEFORE OPERATING 277 Brodhead Road Bethlehem PA 18017 8600 U S A Tel 610 954 9000 ...

Page 2: ...GOW MAC Instrument Co 2 ...

Page 3: ...nts SECTION 1 SAFETY 5 SECTION 2 SPECIFICATIONS 7 SECTION 3 INSTALLATION 9 SECTION 4 OPERATING CONTROLS 17 SECTION 5 OPERATION OF THE SERIES 5900 DID GC 21 SECTION 6 MAINTENANCE SERVICE 27 SECTION 7 VALVES 29 SECTION 8 REPLACEMENT PARTS 33 ...

Page 4: ...nstrument was designed for DRY sample applications only Care must be taken to make sure only moisture free samples are introduced into the system GOW MAC Instrument Company is not responsible for damage to equipment caused by exposure to hydrolyzed samples ...

Page 5: ...tially dangerous voltages B DO NOT handle exposed voltage terminations until the load and or supply has been discharged grounded An unloaded supply may take up to 15 seconds to fully discharge C Makesurethattheactuallinevoltageisthepropervalueforwhichtheinstrument was designed For properly grounded outlet only D DO NOT overload the AC outlet with other electrical equipment E Adhere to the color co...

Page 6: ...approved adequate pressure reducing regulators and pressure relief devices to prevent over pressurizing the tubing and equipment WARNING READ CGA AND OR O S H A PROCEDURES FOR PROPER HANDLING OF COMPRESSED GAS CYLINDERS 1 5 GENERAL A Perform periodic leak checks at all fitting areas The GOW MAC Model 21 070 Mini Gas Leak Detector is recommended to find small leaks B Keep combustibles away from gas...

Page 7: ...e are also exit ports for measuring column flow purge flow and sample flow which are 1 8 compression fittings There are a maximum of four pneumatically actuated valves mounted inside a purged housing Refertothesystemflowdiagramandvalvesectiontodeterminewhichvalves are included in your Series 5900 2 4 Specifications for the Series 5900 DID GC Dimensions 19 5 W x 25 D x 12 1 2 H 48 26 cm x 63 5 cm x...

Page 8: ...ous 15 20 Note 1 Air or N2 from cylinder is preferred If plant air from compressors must be used an oil separator water dryer and 40 micron or smaller particle filter are required Note 2 For DID carrier service UHP helium 99 9995 purity must be further purified by a GOW MAC model 75 800 noble gas purifier or equal High Voltage Discharge Ionization Power Supply Output Voltage up to 1000 V Max Outpu...

Page 9: ...ion Software E AC Power Source Series 5900 1100 W at 115 V 60 Hz Series 5902 550 W at 230 V 50 Hz WARNING OPERATING INSTRUCTIONS FOR BOTH MODELS ARE THE SAME EXCEPT FOR LINE VOLTAGE REQUIREMENTS TO PREVENT DAMAGE TO THE INSTRUMENT MAKE SURE THAT THE AC ELECTRICAL OUTLET IS THE CORRECT VOLTAGE BEFORE PLUGGING IT INTO THE OUTLET DO NOT PLUG THE UNIT IN AT THIS TIME F GOW MAC P N 59 595 Accessory Pac...

Page 10: ...mperature stability in the course of an analysis or preparation B Enough adjacent tabletop space should be allowed for the installation of computers etc Allow sufficient space on all sides of the GC for easy access C Make sure that there is adequate space for the installation of the gas cylinders Cylindersshouldbesecurelyfastenedtoanimmoveablestructure perCGAand or O S H A regulations D An electri...

Page 11: ...s Cable color is as follows RED lead positive BLACK lead negative and SILVER shield lead ground B Connections 1 Connect one end of the cable to the terminals located at the rear of the GC FIGURE 3 1 Color connections should be made as follows BLACK lead to BLACK or NEGATIVE terminal RED lead to RED or POSITIVE terminal SILVER lead to GREEN or GROUND terminal 2 Connect the other end of the cable to...

Page 12: ...Connection FROM Separator Trap Connection TO Separator Trap Jumper supplied with GC GC with Separator or Oxy Trap Installed Connection FROM Separator Trap Connection TO Separator Trap Jumper supplied with GC FIGURE 3 3 3 9 Gas Connections General A The SERIES 5900 DID GC requires the following gases Research or Ultra High Purity Helium He or Purified Helium for the carrier gas and the discharge ga...

Page 13: ...f the GC and the extremely sensitive detector from grease oil orchemicalresi due ALLstainlesssteelorinconeltubingMUSTbe free of all possible contaminants PRIOR to connection to the SERIES 5900 DID GC a Cut desired tubing length with a hand held tubing cutter DO NOT use any cutting oils or motorized saws Oils contaminate and saws create ruff edges and burrs 2 All tubing should be free from moisture...

Page 14: ... is not as pure as the sample gas negative peaks can occur for gases which are in lower concentration in the sample gas By using a carrier gas purifier GOW MAC Model 75 800 in the helium line instrument grade helium can be purified to a level cleaner than chromatographic grade helium NOTE IT IS HIGHLY RECOMMENDED THAT IF A PURIFIER WAS PURCHASED THE OPERATOR READ THE GAS PURIFIER OPERATING INSTRUC...

Page 15: ...nt A This instrument is equipped with a maximum of six 6 bellows metering valves They are used to set carrier flows through the columns and system For making initial flow adjustments all valves should be in the counter clockwise starting positions blue color on LCD display B Turn the Helium carrier ON at the regulator Allow CARRIER to flow for about one 1 hour to purge air out of system The operat...

Page 16: ...final valve going to the DID and reset flows as per procedure above 3 13 Leak Check A After all connections have been made and the gases are flowing it is VERY IMPORTANT that they be tight and free from leaks Leaks in the carrier gas lines will cause baseline drift noise and will interfere with the extremely sensitive DID contamination CAUTION A LEAK CHECK SHOULD BE MADE OF THE ENTIRE GC SYSTEM PR...

Page 17: ... TEMP Sets and reads the temperature of the detector 8 DID ZERO Adjusts the signal offset in order to establish the baseline position on the recorder 9 OFFSET Sets a desired baseline offset over zero 10 IGNITE Increases the DID voltage to 800 V to ignite the polarization DID should run at 525 600 V once lit 11 RANGE Adjusts the amplification of the electrometer by a factor of 10 Range 1 R1 is the ...

Page 18: ... protects the entire instrument from AC voltage malfunctions Should power fail to remain ON remove power cord from AC outlet and check for shorted fuse B Service Cord This power cord should be plugged into a grounded receptacle If grounded receptacle is not available use a three two adapter but make sure that the ground lead is attached to the screw on the receptacle plate 4 3 Columns The SERIES 5...

Page 19: ...ETECTOR DOES NOT OCCUR REFER TO SECTION 6 1 D FOR PROPER COLUMN CONDITIONING PROCEDURE 7 6 5 4 3 2 9 1 11 8 10 FIGURE 4 2 1 LCD Digital Touchscreen Display 2 Detector Helium Metering Valve 3 Carrier 1 Metering Valve 4 Carrier 2 Metering Valve 5 Carrier 3 Metering Valve 6 Carrier 4 Metering Valve 7 Carrier 5 Metering Valve 8 Purge Helium Valve 9 Oven Lid 10 Sample Inlet Optional Back Panel Standard...

Page 20: ...ECTOR OUT 6 CARRIER IN VCR fitting 1 4 7 PURGE OUT 8 VENT 1 9 SAMPLE OUT 10 SAMPLE IN 11 From Separator optional 12 To Separator optional 13 Valve Control 9 pin serial connection 14 I D Connection 25 pin serial connection 15 Ethernet connection 16 USB connection 17 Power 18 Recorder Output 1 2 3 4 5 6 7 8 9 10 11 12 15 16 17 18 G 13 14 FIGURE 4 3 ...

Page 21: ...al bellows valves The valves were factory set to produce the test results included with your instrument so drastic adjustments may not be necessary See parameters and settings listed on the supplied test chromatogram 3 Check for leaks as described in Section 3 13 4 Turn on purge gas flow Check for proper flowrate 30 mL min on back of instrument as described in Section 3 11 This has been factory se...

Page 22: ...the current to ensure the voltage stayswithinthisrange Thismaytakeafewminutesifthecarriergaslinestill contains air NOTE THE ARC MAY TAKE FROM 30 SECONDS TO 5 MINUTES TO SPARK PROVIDED THERE ARE NO CONTAMINATIONS IN THE SYSTEM Once arc has been established DID ImA Discharge Current should read between 4 10 mA 2 The POL VOLT Polarization Voltage should be set for 160 V for standard operation The POL...

Page 23: ... V to 6 25 V I Data Acquisition The SERIES 5900 GC may be used with data handling PC software After the software is properly installed and connected to the instrument the software may be turned ON Reference should be made to the software operating manual 5 3 Calibration A After allowing for sufficient time for the SERIES 5900 DID GC to equilibrate and the operating parameters are rechecked it is r...

Page 24: ...ctions 5 4 Standby and Overnight Conditions A CARRIER GAS DISCHARGE GAS should remain as is B Turn PURGE gas flow rate down to 10 cc min 5 5 Shut Down Procedure A The following should be performed in the following sequence to insure proper cool down of the GC and longer life of the detector 1 Stop the software method for automatic injections 2 Shutdown the display using the SHUTDOWN key on the low...

Page 25: ...ected properly 2 Pneumatic _ _ _ _Gas cylinder pressures are sufficient _ _ _ _Gas flow rates are adjusted properly Carrier Gas Flow 30 mL min Detector Gas Flow 10 mL min _ _ _ _Appropriate column is installed _ _ _ _Leak check of entire system made _ _ _ _Recorder Integrator zeroed 3 Front Panel _ _ _ _All temperature settings are set to desired settings NOTE IF PEAK SIZE CHANGES AFTER SITTING OV...

Page 26: ...GOW MAC Instrument Co 26 ...

Page 27: ... Careshouldbeexercisedwhenchangingorremovingcolumns Damagetoadjacent threads may occur if they are hit with a wrench or other object which may result in the cross threading of nuts Both a 7 16 and a 3 8 open end wrench are necessary for either removing or tightening the column nuts A new gasket is required each time a change is made D Column Conditioning CAUTION CHECK COLUMN OPERATING PARAMETERS B...

Page 28: ...fore shipping Once these calibrations are performed they should never need adjustment again during the life of the instrument If questions arise that this manual does not answer or service of our GC goes beyond these instructions please call our REPAIR DEPARTMENT at 610 954 9000 For a complete overhaul new detector or other repairs please contact us for a RETURN AUTHORIZATION NUMBER and further in...

Page 29: ... gas samples into the chromatograph on a reproducible basis The sample may be taken from a static system or from a flowing stream Valvesarealsousedforcolumnback flushing heart cutting columnselection sample selection and detector switching A Sample Isolation Valve The 4 port sample isolation valve is included in every Series 5900 GC The sample isolation valve allows the operator to purge the sampl...

Page 30: ...re for another injection Care must be taken to allow sufficient time for the sample loop to be completely filled with sample before injection This time is easily calculated from the carrier gas flow and sample loop volume Similarly allow sufficient time for carrier gas to sweep the loop before switching the valve from INJECT to PURGE Compressibility of the sample can be a problem when using a gas ...

Page 31: ...backflush the heavy gas at a 3 1 ratio meaning there should be 3 minutes of backflush time for every minute into the precolumn E Foreflush or Heartcut Valve The 4 port foreflush valve is opposite of a backflush valve and is used to purge a lighter gas that elutes before the impurities of interest The sample loop will inject the sample gas onto the precolumn which will separate the smaller lighter ...

Page 32: ...on the rear of the GC The external valve selection on the LCD touchscreen must be selected to ON in order to accept the signals from a remote source or software The schematic below shows the pin configuration for the valves in relation to the DB9 connector The DB25 connector board can be used to remotely control the GC and digitally read the output signal See schematic below for wiring configurati...

Page 33: ...tal Touchscreen 123 341 Power Supply 24 VDC 0 1 7 A 123 111 PCB CPU Interface 123 328 Detector Discharge Ionization Detector 15 590 Electronic Parts Controls Blower Motor 127 358 Blower Wheel 127 381 Blower Wheel Ring 127 370 Fan Blade 127 360 Purge Adjust Valve 180 671 Probe platinum 124 175 Back Panel Fan 24 V 124 267 Back Panel Finger Guard 127 246 Power Cord 3 conductor shielded 115 V 127 378 ...

Page 34: ...as Sample Valve 181 502 6 port Valco Gas Sample Valve Hastelloy 181 402HC 8 port Valco Column Selection Valve 181 503 8 port Valco Column Switching Valve Hastelloy 181 403HC 10 port Valco Column Selection Valve 181 504 10 port Valco Column Switching Valve Hastelloy 181 404HC Indicates special parts for corrosion resistant DID systems Indicates cleaned for Oxygen Service ...

Page 35: ...t covered by this warranty 6 Instrument parts which have been repaired or replaced during the warranty period are themselves warranted only for the remaining unexpired portion of the original one year warranty 7 Repairs adjustments and service performed after expiration of the one year warranty period shall be charged to the purchaser at the then current prices for parts labor and transportation 8...

Page 36: ...GOW MAC Instrument Co 36 ...

Page 37: ...bove boxes are checked the following statements and or questions must be answered 1 Specifically describe where on or in the instrument device part there could be any residual contamination for example blood spill on the surface ____________________________________________________________________________________________ ______________________________________________________________________________...

Page 38: ...GOW MAC Instrument Co 38 ...

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