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Anleitung Zusammenfassung
The Snifi t is not intended to be used in fl ue gases or in temperatures exceeding 104 °F (40 °C). Features • Measures and displays 0 to 1999 ppm CO in room air • Sensitive CO sensor will last up to 2 years • Backlight for viewing in dark areas • Compact pocket size • Low battery indication • Manual zero adjust • Factory calibrated on 100 ppm CO • Simple fi eld calibration • Auto power-off after 35 minutes • Single 9V battery (included) provides at least 1500 hours of operation Bacharach, Inc. 621 Hunt Valley Circle, New Kensington, PA 15068 Ph: 724-334-5000 • Fax: 724-334-5001 • Toll Free: 800-736-4666 Website: • E-mail: help@mybacharach.com Printed in U.S.A. ® Registered trademarks Instruction 0019-9201 Rev.4 – May 2010 - 5 - - 6 - Replacement Parts Item Part No. CO Sensor and Gasket .................................... 0019-7061 Filter ................................................................ 0019-3244 Accessories Item Part No. Calibration Kit ................................................ 0024-7059 Calibration Tool / Cup Kit .............................. 0019-3242 Span Gas Cylinder, 100 ppm CO in air ......... 0051-1994 Zero Gas Cylinder, 20.9% O2 in Nitrogen ...... 0051-7131 Bacharach Service Center Replacement parts and accessories can be obtained by contacting the following Bacharach Service Center: Bacharach, Inc., 621 Hunt Valley Circle New Kensington, PA 15068 Phone: 1-800-736-4666 • FAX: 724-334-5723 Figure 4. Sensor Installation CO SENSOR GASKET FILTER WARNING! Remove jumper-wire (if installed) from pins before installation ® 4. Remove wire-jumper (if installed) from pins of new sensor; plug in sensor and install the new gasket supplied; then reassemble the instrument. 5. Wait 30 minutes; then calibrate the new sensor. Figure 3. Battery Location 3. Push the Calibration Cup over the sensor housing. 4. Attach a CO Span Gas Cylinder to the regulator. Then apply span gas to the sensor by adjusting the regulator knob for a fl ow rate of 2 SCFH. 5. Allow span gas to fl ow until the displayed reading stabilizes – approx. 3 minutes. Then, using Calibration Tool 0006-9453 (supplied in Calibration Tool / Cup Kit 0019-3242), turn the Span Adjust potentiometer until the displayed reading matches the concentration stamped on the Span Gas Cylinder. 6. Calibration is now complete. Turn off the Regulator and remove the calibration equipment. Maintenance Battery Replacement Remove slotted screw from rear of instrument; then lift off front case. Replace 9V Alkaline battery (Duracell MN1604 or equiv.) in location shown in Figure 3; then reinstall front case. Sensor Replacement The sensor needs replaced when it can no longer be calibrated to the Span Gas Cylinder value using the Span Adjust potentiometer, or if it no longer responds to a CO source. 1. See Figure 4. Remove the screw from the rear of the instrument; then lift off the front case and remove the printed circuit board assembly. 2. Unplug the old sensor and remove its gasket. Discard both items properly. 3. Inspect the sensor fi lter. Replace the fi lter if it has become contaminated with dirt. Speci fications Gas Monitored............. Carbon Monoxide (CO) Range ........................... 0 to 1999 ppm Resolution .................... 1 ppm Accuracy ...................... ± (5% of reading + 5 ppm) Response ...................... . 30 sec. to 90% of final value Power ........................... 9V battery Battery Life ................. 1500 hours minimum Temperature Range .... 32 to 104 °F (0 to 40 °C) Case Material.............. High impact plastic Weight.......................... 0.25 lb (0.11 kg) without battery Dimensions.................. 5.5" L x 2.0" W x 1.6" H (140 x 51 x 41 mm) Operation Turning the Snifit ZERO ADJUST (Recessed) On & Off MONOXIDE ANALYZERMONOXIDE ANALYZER ppmCO CARBONCARBONSnifit momoded 505e 0 Back ght Off -Power On Span Adjus LO BAT SPAN The Snifit is turned on ADJUST POT. and off by pressing the LOW BATTERY INDICATION DISPLAY Power On and Power Off buttons, respec- POWER ON BACKLIGHT tively. If the instru- ON/OFF POWER OFF ment is not manuallyturned off, it will automatically shut itselfoff after approximately35 minutes. Zeroing the Sensor Figure 1. Snifit 50 Turn on the Snifit and allow the displayed reading tostabilize before proceeding – approximately Then with the instrument sampling thatis free of CO), use a screwdriver to Zero Adjust potentiometer at the top of the areading of 0 ±1 ppm. - 2 If you’re not sure about the quality of the surroundingair, you can apply a blend of Oxygen/Nitrogen gas tothe sensor as described under Calibration. If rapid temperature changes are encountered (suchas from freezing to room temperatures) during theoperation of the analyzer, the operator must allow theanalyzer to stabilize at the ambient temperature for atleast 2 minutes before taking a measurement. Checking for CO Important! Ensure that the sensor grille at the rear of the instrument is unobstructed and ...