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Summary of Contents for Quantek 901
- Page 1 MODEL 901 OPERATING INSTRUCTIONS Quantek Instruments 183 Magill Drive Grafton, MA 01519 www.quantekinstruments.com (508) 839-3940 2022...
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Page 2: Before You Begin
BEFORE YOU BEGIN Thank you for your purchase. Before you begin using the Model 901, please review the following tips and precautions. 90% of repairs are due to the issues outlined below: Use a filter on the tip of the sample probe. -
Page 3: General Description
GENERAL DESCRIPTION The Quantek Model 901 is a battery-operated, portable oxygen analyzer used for the measurement of oxygen in packages, gas streams, containers, and hundreds of other applications. INITIAL SETUP The analyzer arrives with fully charged batteries. Perform this procedure to... - Page 4 Changes in elevation will also affect your initial reading. If the analyzer is calibrated for sea level, and you bring it to 5000 feet above sea level, you may notice the starting O This is normal – concentration shows 17.9%. repeat the “initial setup”...
- Page 5 If you ever need to run the pump for longer than 12 seconds, you can hold the button down. This is rare, and would only be applicable to situations where you might not have the probe positioned properly to get a good reading.
- Page 6 production facilities can corrode the circuitry in the unit. 4. Do not operate the unit while plugged in – it is designed to be operated from the batteries. 5. Be sure to check the battery polarity (+ and -) if you decide to swap out batteries.
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Page 7: Operation Summary
AA NiMH cells. Most NiMH chargers will work for a range of AA quantities (i.e. 2-10 cells). Please note: you will void your warranty if you use a non-Quantek charger. OPERATION SUMMARY: 1. Insert a particulate filter onto the end of the sample probe. - Page 8 testing a gas stream, or a chamber, you may want to use a blunt needle. 2. Press the POWER switch to start unit. No warm up is required. 3. Press the PUMP switch. The pump will come on for approximately 2 to 12 seconds and pull room air into the sensor through the syringe needle and filter.
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Page 9: Calibration Overview
To see examples of package testing, use the following URL: www.quantekinstruments.com/901support/ CALIBRATION OVERVIEW The factory calibration schedule is two years after initial purchase, and every year thereafter. Customers who are comfortable self-calibrating can use the procedure below. Since the response of the oxygen sensor is very linear (especially between 0.0% and 20.9%), checking the zero point and the span point are sufficient for excellent accuracy. - Page 10 you take the instrument from sea level to Denver, it will read 17.9%. The amount of oxygen in a room will not vary much – even in a closed building with many people. However, if you ever want to be sure, you can set the span using outside fresh air.
- Page 11 Press the PUMP button, drawing in the flow . The zero will read 0.0, plus or minus 0.1% O If the reading is not in this range adjust the O ZERO potentiometer as needed. Several turns will be needed to see any movement in the reading, as the adjustment is not very sensitive.
- Page 12 with a robust flow and place the sample probe (with needle attached) straight into the tube from which the flow is generating – but do not create a tight seal. Make sure the nitrogen is flowing at a high rate, so that when you press the pump button, you are not drawing in room air.
- Page 13 including the needle, filter, sample probe, tubing, fitting, internal tubing and valve. A simple, periodic test can determine proper operation. With the needle and filter installed, simply perform the zero test described in the previous section and the unit should read zero. With the needle still in the bag, operate the pump several times.
- Page 14 If your package appears to be totally evacuated after sampling, or you hear the pump “laboring” mid sample, re-set the pump time to a smaller value. Avoid pulling the entirety of the headspace of a package; this can create a vacuum effect that will cause erroneously low readings.
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Page 15: Sample Probe Assembly
a. if the reading goes down to 19- 20%, then goes back up to 20.9%, then you probably have no blockage in the filter, needle, or probe. b. if the reading goes down to 14- 19%, then back up slowly to 20.9%, you have a blockage in the filter, needle, or probe. - Page 16 The unit will run 8-12 hours before needing recharging. To re-charge the batteries, plug the external charger module into a standard AC outlet, connect the plug from the charger to the jack located on the side of the 901, and turn...
- Page 17 4 hours, with the charger provided. Do not use a charger other than the supplied charger – it is a trickle charger specifically designed to charge the Model 901. Also, the jack and plug are of a specific type and size.
- Page 18 NiMH batteries designed to accept a quicker charge can also be used, as long as they are AA size, 1.2-1.4 volt, and are of the NiMH or Ni-Cad type. Do not use other rechargeable types such as lithium. AA alkaline (non- rechargeable) batteries can be used in some situations, but extreme caution must be exercised because plugging the unit into the...
- Page 19 provided which fits onto the end of the sampling probe. Avoid direct sampling of pressurized gas cylinders. High pressure can cause damage to the sensor. To test the content of a cylinder, flush the sample into a plastic bag and sample from the bag. ADVANCED SAMPLING CONCEPTS Headspace volume: The amount of...
- Page 20 1) High volume / Highly Flexible packages (such as a bag of potato chips) - for flexible packages, as long as the amount of headspace is >20cc, then this is generally not a problem. Imagine a large bag of potato chips - the package will collapse as sample is removed.
- Page 21 Once you inject water, this will displace the sample into the instrument. The absolute lower limit for the 901 is 5cc. For volumes smaller than 5cc, you will need to purchase our Model 905, 905LV, or 905V.
- Page 22 Check with Quantek for resealing foam pads, we are always innovating our consumable choices and we may have a solution. Another option, which is less scientific, is to pull 10 packages from the same lot. Test package one after 3 days; test package two after 6 days;...
- Page 23 Unscrew the probe to rule out blockage in the probe. If the reading still does not move, contact Quantek for service. Readings seem a A common cause of this is the little high – even...
- Page 24 oxygen sensor may be depleted; contact us for replacement sensor or send analyzer back for full testing, sensor replacement, and calibration. Batteries do not No matter which charger you appear to be have, the LED will go to a solid charging, even after green when charging is complete.
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Page 25: Operating Supplies
9028 Liquid and Particulate filter, pkg of 25 9003 Tri-Beveled Needles, pkg. of 5 9027 Tri-Beveled Needles, pkg. of 20 9067 Sample probe assembly 9011 Battery Charger for 901 9008 NiMH batteries, pkg. of 4 * - Needles are available in 18G and 20G... - Page 26 Shipping Address: Quantek Instruments 183 Magill Drive. Grafton, MA 01519 Tel 508 839-3940 Fax 508 819-3444 sales@quantekinstruments.com Email: Please check with your local supplier or distributor if outside the U.S. To return the analyzer for repair or calibration, please be sure to unscrew the sample probe (but include it in a separate bag), include your contact information, and include the charger and batteries.
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