Zefon GEMINI User manual

GEMINI®
Twin Port Sampler
Operation Manual
The warranties made by Zefon International Inc. with respect to the
product are voided if the product is not used and serviced in accordance with the
instructions in this manual. Please protect yourself and others by following them.
We encourage our customers to write or call regarding this equipment prior to use
or for any additional information relative to use or repairs.
In the U.S., contact Zefon at 1-800-282-0073.
To contact Zefon outside the U.S., dial [phone]
or email at [email protected].
© Zefon International, Inc. 2011 - All Rights Reserved
PRODUCT OF U.S.
Manufactured by
ZEFON INTERNATIONAL, INC.
5350 SW 1ST LANE • OCALA, FL 34474
(L) Rev 6 800302
WARNING
THIS MANUAL MUST BE CAREFULLY READ BY ALL INDIVIDUALS WHO HAVE OR
WILL HAVE THE RESPONSIBILITY FOR USING OR SERVICING THE PRODUCT. Like
anypieceofcomplexequipment,the instrumentwillperformasdesignedonlyifit
is used and serviced in accordance with the manufacturer’s instructions.
OTHERWISE, IT COULD FAILTO PERFORMAS DESIGNEDAND PERSONSWHO RELY
ONTHISPRODUCTFORTHEIRSAFETYCOULDSUSTAINSEVEREPERSONALINJURY
OR DEATH.

Table of Contents
Chapter 1, Basic Operation ..................................1-1
Introduction................................................................................................ 1-1
Description................................................................................................. 1-1
Contents of Kit............................................................................................ 1-1
Figure 1-1. Worker Wearing GEMINI Twin-Port Sampler................... 1-2
Figure 1-2. Worker Wearing 2 Samplers with “Y” Connection.......... 1-3
Operation Instructions ................................................................................ 1-4
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 Sampling....................................................................................... 1-8
Chapter 2, Maintenance.......................................2-1
Tube Holder................................................................................................ 2-1
Foam Filter ................................................................................................. 2-1
Filter Disc ................................................................................................... 2-1
Valves......................................................................................................... 2-2
Performance Test ....................................................................................... 2-2
Chapter 3, Parts List.............................................3-1
Repair Kit Parts List.................................................................................... 3-1
Accessories Parts List ................................................................................ 3-2
Table of Contents
GEMINI Twin Port Sampler TOC-1

Chapter 1, Basic Operation Operation Manual
GEMINI Twin-Port Sampler 1-1
Chapter 1
Basic Operation
Introduction
Congratulations on your purchase of the GEMINI Twin-Port
Sampler, an instrument designed for low ow industrial
hygiene sampling and backed by years of Zefon qualty,
dedication, and service.
Please read the “Operation Instructions” and “Helpful 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 Tubes. It is compatible with any personal sampling pump
capable of 1.5 LPM ow rate at a load of 25” of water column
(w.c.). See FIGURES 1-1 and 1-2.
Contents of Kit (See FIGURE 1-3)
• GEMINI Sampler with Tube Protector for small
Sorbent Tubes
• Tube Protector for larger Sorbent Tubes
• Tubing (1/8” ID for connection to GEMINI Sampler,
connected by a tting to 1/4” ID)

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)

Chapter 1, Basic Operation Operation Manual
GEMINI Twin-Port Sampler 1-3
•
• “Y” Connector for multi-Sampler applications

Chapter 1, Basic Operation Operation Manual
1-4 GEMINI Twin-Port Sampler
Operation Instructions
1. Connect the pump inlet to the GEMINI Sampler barb tting
using the tubing and the adapter supplied. (The adapter
may not be needed for some pumps.)
2. Turn on the pump, and adjust the ow to approximately 1.5
LPM (1.2 to 1.7 LPM). As a general rule, the pump ow
rate needs to be at least two to three times the total ow
rate through the tubes.
3. Remove the Tube Protector from the GEMINI Sampler.

Chapter 1, Basic Operation Operation Manual
GEMINI Twin-Port Sampler 1-5
4. Break off both tips of the Tube to be used for sampling.
5. Install Tubes in the Tube Holders. See FIGURE 1-4.
6. Preset the ow rates through each Tube to the approximate
ow desired (see “Helpful Hints” #3 later in this chapter).
7. Connect a length of tubing to the inlet of one Tube.
8. Connect the other end of this tubing to a primary calibrator
or a precalibrated owmeter.

Chapter 1, Basic Operation Operation Manual
1-6 GEMINI Twin-Port Sampler
FLOW RATE
LOW BATT
On Off
• Flow rates may be easily set by using the DigiCal 5
Primary Calibrator (part no. 655101) or an equivalent
device (FIGURE 1-5)
9. Adjust the needle valve to obtain the desired ow rate
through the Tube.
10. Repeat steps 6, 7, and 8 for the other Tube.
NOTE: The total ow must not exceed 500 ml per
minute (ml/min).
11. Install either the large or small Tube Protector.
12. Sampling may begin immediately, or the pump may be
turned off until sampling is to be started.
Figure 1-5.
Setting the Flow Rate with the DigiCal 5 Primary Calibrator