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Gow-Mac 5900 Series Operating Manual
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Gow-Mac 5900 Series Operating Manual

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
October 2019
Rev. 1
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 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.

  • Page 3: Table Of Contents

    Contents 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..................
  • 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

    SECTION 1 - SAFETY 1.1 This section is designed to bring special attention to specific areas or practices that may pose particular hazards to personnel and/or equipment safety only. For complete installation instructions, see Section 3. It is in the operator’s best interest to read this sec tion to ensure the safe operation of the instrument.
  • Page 6 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 cylinders and elimi nate ignition sources. C. DO NOT place papers, charts, samples, etc. on top of the GC.

  • Page 7: Section 2 - Specifications

    SECTION 2 - SPECIFICATIONS 2.1 The GOW-MAC SERIES 5900 DID is a rugged, compact gas chromatograph designed for the analysis of low concentrations of impurities in base gases. 2.2 The right-hand section of the SERIES 5900 contains the electronics necessary for the proper operation of the gas chromatograph.
  • Page 8 Output Voltage: up to 500 V Max. Output Current: 1 mA Electrometer Amplifier C ircuit: solid state FET operational amplifier powered by voltage regulated hybrid regulator circuit Sensitivity: 1.5 x 10-12 A, full scale 1 mV recorder Dynamic Range: 1 x 106 Noise: with cable +3 µV at maximum sensitivity Drift: <2 µV/hr under controlled environmental conditions GOW-MAC Instrument Co.

  • Page 9: Section 3 - Installation

    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 Package Package Includes: a) Ultra high purity regulator with CGA 580 fittings b) Ultra high purity regulators with CGA 350 fittings c) Regulator with CGA 580 fitting d) Model 75-800/75-802 Noble Gas Purifier (noted on B. above)
  • Page 10 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 representative. B. Remove all plastic and/or paper shipping caps and restraints before operating.
  • Page 11 Consult the software operating manual for installation and operating instructions. 3.8 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 3.3): Disconnect left fitting on left column.
  • Page 12 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 gas Instrument Grade Helium (He) for actuating the valve and purging the DID housing B. The Ultra High Purity Helium Gas cylinder should be equipped with an Ultra High Purity Helium Regulator. GOW-MAC Instrument Co.
  • Page 13 C. The carrier gas and sample gas 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, or chemical resi due, ALL stainless steel or inconel tubing MUST be...
  • Page 14 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.
  • Page 15 GC) when the 4 port Sample Isolation Valve is in the CARRIER position. Adjust flow by manipulating CARRIER 1 Metering Valve. D. Turn Sample Isolation Valve to SAMPLE and set flow rate by adjusting the metering valve in the SAMPLE supply line (supplied in GOW-MAC Accessory Package #59- 595). Sample Isolation Valve should be kept in the CARRIER position except for when making an injection.
  • Page 16 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 Instrument Co.

  • Page 17: Section 4 - Operating Controls

    SECTION 4 - OPERATING CONTROLS 4.1 Controls A. With the exception of the MAIN POWER SWITCH, all of the operating controls are located on the LCD Digital Touchscreen. The operator should become very familiar with these controls and their functions BEFORE operating the instrument. Refer to FIGURE 4.1.
  • Page 18 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 5900 DID GC comes equipped with analytical columns for a specified application. GOW-MAC Instrument Co.
  • Page 19 NOTE COLUMNS SUPPLIED ARE CONDITIONED. PROPER COLUMN CONDITIONING PROCEDURES SHOULD BE OBSERVED BEFORE ANALYSIS IS PERFORMED. CARE SHOULD BE TAKEN DURING CONDITIONING SO CONTAMINATION OF THE DETECTOR DOES NOT OCCUR. REFER TO SECTION 6.1,D FOR PROPER COLUMN CONDITIONING PROCEDURE. FIGURE 4.2 LCD Digital Touchscreen Display Detector Helium Metering Valve Carrier 1 Metering Valve...
  • Page 20 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 FIGURE 4.3 GOW-MAC Instrument Co.

  • Page 21: Section 5 - Operation Of The Series 5900 Did Gc

    SECTION 5 - OPERATION OF THE SERIES 5900 DID GC 5.1 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. 5.2 Initial Operation A. Turn power switch "ON" at rear of instrument. The LCD touchscreen will boot up and display the operation screen.
  • Page 22 1. Set the DID signal range. Set the range by pressing the toggle button of number 1 through 4. The set number and sensitivity correlation is shown in the table below. Set Number Sensitivity Most Medium Least GOW-MAC Instrument Co.
  • Page 23 F. Gain Adjust 1. The gain is set after selecting the range as this is the DID signal amplification. Set the gain by pressing the Gain Adjust box and entering a number of 1 through 4 on the pop-up keypad. The code is shown in the table below. Set Number Gain 1000 G.
  • Page 24 THOROUGHLY PURGE THE ENTIRE INSTRUMENT OF SAMPLE GAS BEFORE SHUTDOWN USING AN INERT GAS — INCLUDING THE SAMPLE INLET. THIS IS REQUIRED FOR SAMPLES WITH HIGH CONCENTRATIONS OF COMPOUNDS THAT FORM ACIDS (HF, HCl, HBr, ETC) OR REACT VIOLENTLY AND/OR CORROSIVELY WITH ATMOSPHERIC ELEMENTS. GOW-MAC Instrument Co.
  • Page 25 5.6 Daily Check List It is good practice to check the following items at the beginning of each day or shift, and when starting up the instrument after a weekend shutdown. 1. Electrical _ _ _ _Additional instrumentation is connected properly. 2.
  • Page 26 GOW-MAC Instrument Co.

  • Page 27: Section 6 - Maintenance & Service

    Care should be exercised to ensure that these columns are not used below 25 °C or above the maximum temperature listed on the column tag. B. Columns for the SERIES 5900 DID GC can be purchased from GOW-MAC. Call Sales at (610) 954-9000 for assistance.
  • Page 28 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 Brodhead Road Bethlehem, PA 18017-8600...

  • Page 29: 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 7.2 All helium actuators are high temperature type (T).
  • Page 30 C. Column Selection Valve: The 8 port column selection valve is used to place one 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 31 D. Backflush Valve: The 10 port backflush valve is used to allow impurities to pass through the column ahead of the “heavy” sample gas with longer retention time. The sample loop will inject the sample gas onto the “precolumn” which will separate the smaller/lighter impurities and allow them to pass to a primary column or directly to DID. As soon as the impurities of interest are through this precolumn, the valve will rotate to the CCW position where the heavy retained gas will reverse carrier flow and purge out to vent preventing it from reaching the DID.
  • Page 32 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 s oftware. 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 configuration. GOW-MAC Instrument Co.

  • Page 33: Section 8 - Replacement Parts

    SECTION 8 - REPLACEMENT PARTS FOR THE SERIES 5900 DID GC When ordering replacement parts for your SERIES 5900 DID GC, please specify the serial number of the instrument. Description Part Number Heaters (115 V) Column Oven Heater, 500 W 124-183 Detector Heater, 50 W 124-187...
  • Page 34 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 35 Filaments of thermal conductivity detectors are not covered by this warranty. 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 36 GOW-MAC Instrument Co.
  • Page 37 Failed Safety Inspection. DO NOT proceed to Repair Dept. RMA No: __________________ ( ) On Back >>>> □ REP-005 Health-Safety Declaration Doc REV 6 (0212).docx Rev. 6 2/15/2012, gsj 277 Brodhead Road, Bethlehem, PA 18017 U.S.A. Tel: (610) 954-9000 Fax: (610) 954-0599 E-mail: sales@gow-mac.com URL: www.gow-mac.com...
  • Page 38 GOW-MAC Instrument Co.

This manual is also suitable for:

5902 series