Gow-Mac Series 5900 Instructions & Operating
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Gow-Mac Series 5900 Instructions & Operating

Discharge ionization detector gas chromatograph
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OPERATING MANUAL
Series 5900
Discharge Ionization Detector
Gas Chromatograph
Series 5900: 105-125 VAC, 60 Hz
Series 5902: 200-240 VAC, 50 Hz
July 2021
Rev. 5
READ INSTRUCTIONS
BEFORE OPERATING
277 Brodhead Road, Bethlehem, PA 18017-8600 U.S.A. Tel: (610) 954-9000

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  • Page 1 OPERATING MANUAL Series 5900 Discharge Ionization Detector Gas Chromatograph Series 5900: 105-125 VAC, 60 Hz Series 5902: 200-240 VAC, 50 Hz July 2021 Rev. 5 READ INSTRUCTIONS BEFORE OPERATING 277 Brodhead Road, Bethlehem, PA 18017-8600 U.S.A. Tel: (610) 954-9000...

  • Page 3: Table Of Contents

    SECTION 2 - SPECIFICATIONS ..............7 SECTION 3 - INSTALLATION ................. 9 SECTION 4 - OPERATING CONTROLS ............17 SECTION 5 - OPERATION OF THE SERIES 5900 DID GC ......23 SECTION 6 - MAINTENANCE & SERVICE ..........31 SECTION 7 - VALVES ................... 33 SECTION 8 - REPLACEMENT PARTS ............
  • Page 4 This instrument 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. GOW-MAC Instrument Co.

  • Page 5: Section 1 - Safety

    E. Store cylinders in a well ventilated area away from heat or ignition sources. F. When installing tubing, provide ONLY approved, adequate pressure reducing regulators and pressure relief devices to prevent over pressurizing the tubing and equipment. GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 6 B. Keep combustibles away from gas cylinders and eliminate ignition sources. C. DO NOT place papers, charts, samples, etc. on top of the GC. D. Maintain adequate ventilation. Vent all gases to the outside. DO NOT allow flammable and/or toxic wastes to accumulate. E. De-pressurize supply gas piping before working on it. GOW-MAC Instrument Co.

  • Page 7: Section 2 - Specifications

    Section 2 Specifications The GOW-MAC Series 5900 DID is a rugged, compact gas chromatograph designed for the analysis of low concentrations of impurities in base gases. The right-hand section of the Series 5900 contains the electronics necessary for the proper operation of the gas chromatograph.
  • Page 8 High Voltage Discharge Ionization Power Supply Output Voltage : up to 1000 V Max. Output Current : 10 mA High Voltage Polarization Power Supply Output Voltage : up to 500 V Max. Output Current : 1 mA Electrometer Amplifier Circuit : Solid state FET operational amplifier GOW-MAC Instrument Co.

  • Page 9: Section 3 - Installation

    A. When unpacking the instrument, check it carefully for evidence of shipping damage or rough handling. Check to ensure that all components ordered have either been supplied or back-ordered. Notify GOW-MAC of any discrepancies immediately. The packing box should be retained for use if the instrument needs to be returned to the factory for repair or modification. GOW-MAC does not supply field service. ALL repairs are made at Bethlehem, PA, USA or by an authorized GOW-MAC...
  • Page 10 Location A. The Series 5900 DID GC should be placed in a location that is secure, vibration free, protected from abrupt temperature changes (operating ambient temperature range is 15 °C - 40 °C), and drafts. Such changes may upset the temperature stability in the course of an analysis or preparation.
  • Page 11 5.0 V = 6250 display reading Computing Software Connections Consult the software operating manual for installation and operating instructions. Hydrogen Separator or Oxygen Trap Connections (optional) If you ordered a Hydrogen Separator or an Oxygen Trap from GOW-MAC, follow these directions for connecting one or the other to the Series 5900 DID GC (figure 3.1 and the instrument flow diagram): 1. Disconnect left-hand fitting on left-hand column. 2. Disconnect jumper from the two fittings located on the left-hand side of the oven.
  • Page 12 C. The carrier gas connections and sample gas connections are 1/4” VCR fittings. All other tubing connections are 1/8” compression fittings. D. GOW-MAC strongly encourages the use of NEW unused 1/8” stainless steel or inconel tubing. Contact GOW-MAC Sales to inquire about purchasing new tubing, if necessary. 1. To prevent contamination of the GC and the extremely sensitive detector from grease, oil,...
  • Page 13 3-10 Carrier Gas Purity The Series 5900 DID GC is an instrument which can determine 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.
  • Page 14 GC) when the 4 port Sample Isolation valve is in the CARRIER (CW or CCW) position. Adjust flow with the CARRIER 1 metering valve. Turn SAMPLE ISOLATION valve to SAMPLE and set flow rate by adjusting the metering valve in the SAMPLE supply line. The metering valve is supplied in the GOW-MAC Accessory Package Part No. 59-595. The SAMPLE ISOLATION valve should be kept in the CARRIER position except when making an injection.
  • Page 15 3. Sample gas connection at the front of the GC. 4. All connections made at the gas cylinders. NOTE LEAK CHECKS SHOULD BE RUN PERIODICALLY AND ARE A MUST WHEN NEW COLUMNS ARE INSTALLED OR GAS CONNECTIONS ARE MADE. GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 16 GOW-MAC Instrument Co.

  • Page 17: Section 4 - Operating Controls

    Actual - Displays the actual temperature of the column oven or detector. Set - Sets the desired column or detector. The button is BLUE and turns GREEN once the set temperature displayed on the button is reached within ( ± 2 °C). GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 18 GRAYED out, and valve control by touchscreen is disabled. MENU When the “Menu” button is pressed, the following screen, Figure 4.2 appears. The code number must be entered to activate the desired function. FIGURE 4.2 GOW-MAC Instrument Co.
  • Page 19 The 5900 signal out is connected to the (+) Red and (-) Black RECORDER jacks. These connect to input (+, -) on your computing software package. Refer to Section 3-6 and the software manual for installation and operating instructions. GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 20 CARRIER 4 metering valve CARRIER 5 metering valve PURGE HELIUM valve Oven lid SAMPLE IN 1/4” VCR ® (optional on front panel, standard on back panel) Sample out rotameter *NOTE CARRIER VALVES MAY DIFFER DEPENDING ON THE SERIES 5900 MODEL. GOW-MAC Instrument Co.
  • Page 21 SAMPLE IN (1/4” VCR®) (Standard on back panel, optional on front panel) RECORDER output (+Red) (-Black) ground (chassis) (Green) I/O connection (25-pin connector) VALVE CONTROL (9-pin connector) ETHERNET connection USB connection Power switch ON/OFF From Accessory (optional) To Accessory (optional) FIGURE 4.4 GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 22 GOW-MAC Instrument Co.

  • Page 23: Section 5 - Operation Of The Series 5900 Did Gc

    Section 5 Operation of the Series 5900 DID GC General The chromatographer should be familiar with the techniques of chromatography, the functions of all instrument controls, the operation of the recorder, and the characteristics of the column used PRIOR to running samples.
  • Page 24 2. To change or set the polarization voltage, press “Menu” and enter code number “3” for Pol Voltage 1 or code number “4” for Pol Voltage 2. Press “Enter” to set the new values, or “Esc” to exit to main screen. GOW-MAC Instrument Co.
  • Page 25 ZERO INSTRUMENT” will appear in the status bar at the bottom when a new gain is selected. Proceed to zero the instrument (See Section 5-2.H). The selected gain button turns from BLUE to GREEN. GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 26 The DEFAULT factory settings are as follows: Column Temperature : 70 °C DID Temperture : 40 °C Start Voltage : 750 V Run Voltage : 525 V Polarization Voltage : 160 V Range Gain : 1x Low GOW-MAC Instrument Co.
  • Page 27 Press “Menu” and enter code number “7”. Press “Enter” to accept or “Esc” to exit to main screen. After the update is completed, the Series 5900 GC will automatically self-restart. Verify the updated version on the startup screen. Verify the application parameters (temperature, gain, range, etc.) before operating.
  • Page 28 Additional instrumentation is connected 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. GOW-MAC Instrument Co.
  • Page 29 3. Front Panel _______ All temperature settings are set to desired settings. NOTE IF PEAK SIZE CHANGES AFTER SITTING OVERNIGHT, CHECK THE CARRIER GAS AND DISCHARGE GAS FLOW RATES. GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 30 GOW-MAC Instrument Co.

  • Page 31: Section 6 - Maintenance & Service

    Columns for the Series 5900 GC can be purchased from GOW-MAC. Call Sales at (610) 954- 9000 for assistance. Care should be exercised to ensure that these columns are not used below 25 °C or above the maximum remperature listed on the column tag.
  • Page 32 For a complete overhaul, new detector, or other repairs, please contact us for a RETURN AUTHORIZATION NUMBER and further instructions for the return of your GC. Our receiving address for repairs is: GOW-MAC Instrument Co. 277 Broadhead Road Bethlehem, PA 18017-8600 Tel: (610) 954-9000 Email: repairs@gow-mac.com...

  • Page 33: Section 7 - Valves

    Section 7 Valves General The Series 5900 DID GC is equipped with a maximum of four (4) gas valves. They must be treated with care. WARNING VALVES HAVE UPPER TEMPERATURE LIMITS WHICH, IF EXCEEDED, CAN PERMANENTLY DAMAGE INTERNAL COMPONENTS. UPPER TEMPERATURE LIMIT FOR VALCO VALVES IN THIS GC: 175 °C UPPER TEMPERATURE LIMIT FOR ACTUATORS IS 150 °C...
  • Page 34 C. Column Selection Valve: The 8 port column selection valve is used to place on column in-line with the gas injected from the sample loop into the DID, while the second column is purging with carrier gas. This allows two different applications/impurity analysis on the sample gas by two separate injections. GOW-MAC Instrument Co.
  • Page 35 As soon as the bulk gas elutes and vents, the impurities of interest will continue to pass through the precolumn and the flow path is returned by moving the valve back inline to a primary column. F. Detector/Vent Valve: The 4 port Detector/Vent valve allows residual sample or large impurities that were not foreflushed to be purged to vent before it reaches the DID. This is considered a last line of defense to prevent DID saturation or baseline disruption. GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 36 Automatic/Remote Valve Operation A. The valves in the Series 5900 DID Gas Chromatograph can be operated either manually by the touchscreen or through the use of the DB9 connectors 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...

  • Page 37: Section 8 - Replacement Parts

    Section 8 Replacement Parts When ordering replacement parts for your Series 5900 DID GC, please specify the serial number of the instrument. Heaters (115 V) Column Oven Heater, 500 W 124-183 Detector Heater, 50 W 124-187 Heaters (230 V) Column Oven Heater, 500 W...
  • Page 38 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 GOW-MAC Instrument Co.

  • Page 39: Section 9 - Addendum - Dual O2 Traps

    1/8” Stainless steel line from regeneration gas (H2 or CO) to the “O2 Trap Act. IN” on the fitting on back of accessory housing. Operation Oxygen trap control features are available through the “Aux” button on lower left of main screen. This button will only be available on System 6 and System 39. GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 40 O2 Trap is at operating temperature (80 °C) and also has “Ready” under the temperature display. Selecting the second oxygen trap switches that trap into the flow path and automatically starts the regeneration process of the other oxygen trap by raising the temperature of the “offline” trap. A regeneration timer is started and the “offline” trap will remain at the preset regeneration temperature (130 °C) for 8 hours. There will be a red indicator light next to the regenerate timer and this countdown timer will decrease in minutes. This light will turn off when the regeneration process is complete. GOW-MAC Instrument Co.
  • Page 41 The trap in operation will have “ready” under the temperature box and the trap with “regenerate” is the one ready for use. This newly regenerated trap can now be switched into service at any time. The regeneration process will begin automatically when switched to the “offline” trap. GOW-MAC Series 5900 DID GC R.5, 0721...
  • Page 42 Remote Operation is available by selecting the remote box and connecting an available contact closure valve cable. GOW-MAC Instrument Co.
  • Page 43 3. Filaments of thermal conductivity detectors are not covered by this warranty. 4. All requests for service or repair under this warranty must be received within the warranty period by GOW-MAC or its authorized representative. All repairs are made at GOW-MAC plants or at the office ® of authorized representatives.
  • Page 44 Company name: ____________________________________________________ Fax number: ______________________________ Shipping address: _____________________________________________________________________________________________ City: _________________________________________ State/Country: _______________________ Zip :_______________________ E-mail address: ______________________________________________________________________________________________ BEFORE item can be shipped, fax completed form to: (610) 954-0599 or e-mail it to: repairs@gow-mac.com repairs@gow-mac.com For GOW-MAC Use Only: Signed: ________ Date ____/____/____ Passed Safety Inspection.

This manual is also suitable for:

Series 5902

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