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Chapter 2, Maintenance 

 

 

    Operation Manual

2-2 

GEMINI Twin-Port Sampler

  1.  Remove the Filter Disc from the Tube Holder by rolling the  

 

 

flange part of the Tube Holder down and away from the Disc.

 

2.  Gently tap or blow on the surface to remove any foreign matter.

  3.  Replace the Disc, orienting it so the previously exposed  

   

surface is once again facing away from the Sampler.

Valves

The needle valve stem of each valve can be occasionally  

removed for inspection of the needle and the needle seat.
  1.  Turn the stem counterclockwise until it is free of the valve body.
 

2.  Clean the needle by wiping it with a soft tissue.

  3.  If the valve seems to be clogged (i.e., you are unable to  

   

achieve 500 ml/min. flow at 3-1/2 to 4 turns open), 

 

   

remove the pressure plate and Tube Holders. Direct a  

   

stream of compressed air through the open valve body to  

   

help dislodge any particulate matter causing the problem.

  4.   Reinstall the needle.

Performance Test

After extended idleness and periodically during use, check the 

Sampler for proper performance with the following test:
  1.  Connect a water manometer or vacuum gauge to one of  

   

the Tube Holders.

  2.  Open the associated needle valve 3 to 4 turns counter

 

   

clockwise from fully closed. 

  3.  Connect a flowmeter to the other Tube Holder.

 

  4. 

Close (fully clockwise position) the associated needle valve.

 

Summary of Contents for GEMINI

Page 1: ...fon outside the U S dial 1 352 854 8080 or email at ZefonCS zefon com Zefon International Inc 2011 All Rights Reserved PRODUCT OF U S Manufactured by Zefon International Inc 5350 SW 1st Lane Ocala FL...

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Page 3: ...Figure 1 3 GEMINI Twin Port Sampler Kit 1 4 Figure 1 4 Inserting Sorbent Tubes into the GEMINI Sampler 1 5 Figure 1 5 Setting the Flow Rate with the DigiCal Calibrator 1 6 Helpful Hints 1 7 Remote Sam...

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Page 5: ...Hiits portions of this manual before using the Sampler Description The GEMINI Sampler is designed to measure concentrations of gases and vapors when used with Zefon or other manufacturer s Sorbent Tub...

Page 6: ...Chapter 1 Basic Operation Operation Manual 1 2 GEMINI Twin Port Sampler Four Clips one for each Tube Protector and two extra for clipping to the bottom of the GEMINI Sampler and for tubing management...

Page 7: ...Chapter 1 Basic Operation Operation Manual GEMINI Twin Port Sampler 1 3 Y Connector for multi Sampler applications...

Page 8: ...rb fitting using the tubing and the adapter supplied The adapter may not be needed for some pumps 2 Turn on the pump and adjust the flow to approximately 1 5 LPM 1 2 to 1 7 LPM As a general rule the p...

Page 9: ...sampling 5 Install Tubes in the Tube Holders See FIGURE 1 4 6 Preset the flow rates through each Tube to the approximate flow desired see Helpful Hints 3 later in this chapter 7 Connect a length of tu...

Page 10: ...IGURE 1 5 9 Adjust the needle valve to obtain the desired flow rate through the Tube 10 Repeat steps 6 7 and 8 for the other Tube NOTE The total flow must not exceed 500 ml per minute ml min 11 Instal...

Page 11: ...50 ml min one turn counterclockwise 200 ml min two turns counterclockwise 350 ml min three turns counterclockwise If samples are to be taken at two different flow rates calibrate and fine adjust the...

Page 12: ...5 While rotameters or other devices may be used for rough setting of flows their inherent pressure drop adds to the tube load Therefore use only a soap film device the DigiCal 5 Primary Calibrator Pa...

Page 13: ...inserted so the flow through is in the same direction The stainless steel washer must be placed on the holder before reinstalling the pressure plate To remove the tube holder or to change the filter i...

Page 14: ...ody 2 Clean the needle by wiping it with a soft tissue 3 If the valve seems to be clogged i e you are unable to achieve 500 ml min flow at 3 1 2 to 4 turns open remove the pressure plate and Tube Hold...

Page 15: ...er 2 3 NOTE The vacuum setting should read between 18 and 26 w c the flow should read less than 2 ml min 5 Open the needle valve to adjust the flow to achieve 250 to 300 ml min NOTE The vacuum setting...

Page 16: ...DISC FILTER PUMP 463799 2 2 PLATE PRESSURE SAMPLE TUBE 497711 1 3 CLIP ASSEMBLY 800296 1 4 SCREW 2 56 X 5 16 LG 636267 4 5 WASHER ST STEEL 634257 2 6 HOLDER TUBE 463801 2 7 LABEL FILTER COVER 800095...

Page 17: ...ECTOR LARGE TUBE 497712 3 CLIP ASSEMBLY 800296 4 SILICONE TUBING 1 8 ID 602294 5 Y FITTING 636563 6 TUBING CONNECTOR 636477 7 TUBING 1 4 ID 27234 8 Label Tamper Proof Sheet of 10 802698 Not Pictured L...

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Page 20: ...To contact Zefon International call 1 800 282 0073 Zefon International Inc 2011 All Rights Reserved PRODUCT OF U S Zefon International Inc 5350 SW 1st Lane Ocala FL 34474...

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