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Manafacture: Bacharach File size: 49.19 kb File name: Language of manual:

The instrument will operate once batteries are properly installed and the PTC thermistor is allowed to cool. If batteries are accidently installed in the wrong polarity, a positive temperature coefficient (PTC) thermistor will protect the instrument’s electronic circuitry. The instrument will operate once batteries are properly installed and the PTC thermistor is allowed to cool. Probe Installation Install the probe by sliding the end of its hose over the gas inlet port on the top right side of the instrument as shown in Figure 3. Figure 3. Probe Installation OPERATION OPERATION • Set its POWER switch to ON, • Wait for the instrument to warm up (approx. 1 minute), • Span the display (if necessary), • Take a gas sample. Detailed operating procedures are presented below: 4.1 Power ON/OFF Turn on the instrument by sliding its POWER switch to ON. Observe that when power is first applied, all numerical LCD segments and the decimal point are tested for 5-15 seconds; after which, the LCD shows the detected O2 level. (A minus sign may appear during power up as the sensor stabilizes.) Turn off the instrument by sliding the POWER switch to OFF. 4.2 Adjusting the Instrument After being turned on and warmed up for at least 1 minute, the instrument should indicate 20.9% in fresh air. If the instrument needs to be zadjusted, proceed as follows: 1. Ensure that the instrument is sampling fresh air that is free of any oxygen displacing gases. 2. Using a 1/8" flat-blade screwdriver, turn the ADJUST potentiometer until the LCD shows 20.9%. An instrument can be considered properly adjusted with a display bounce of up to ±0.2%. 4.3 Backlight ON/OFF The LCD can be read in low-light areas by setting the front panel LIGHT switch to ON. The backlight stays on until turned off, or until the POWER switch is set to OFF. 4.4 4.4 The instrument's elastic strap allows the unit to be either hand-held, or hung on nearby objects. By sliding your hand between the instrument and its elastic strap, you can hold onto the Oxor II with a minimum of effort. The instrument's front panel slide switches can then be actuated by your thumb for one- handed operation. Or, by releasing the metal clip at the bottom of the instrument's case, you can hang the instrument by its strap on nearby objects such as nails, sheet metal, or valve handles. 4.5 Using the Probe The basic probe, or the optional rigid stainless steel probe with handle, connected to a flexible hose with sample filter can be used to draw a gas sample into the instrument from the room, grilles, diffusers, furnace flues, hot-water heater flues, and from inside furnaces heat exchangers. Both hose and probe are detachable from the instrument when sampling without the probe, or when sampling with a different probe is desired. Important: If condensation is observed within the hose, do not allow water level to build up to a point where it cuts off flow. 4.6 Interpreting the Display Gas Display The LCD directly shows O2 levels in the range from 0 to 25%. The display on the right indicates a O2 level of 20.9%. Low Battery Indications Low Battery Indications 2 readings under these conditions, the batteries should be replaced as soon as possible. When the battery voltage becomes too low for the instrument to operate, a “-1” is displayed on the LCD. No O2 readings are provided under these conditions. 4.7 Long-Term Storage When storing the Oxor II for extended periods of time, set its POWER switch to OFF and remove the batteries. After long term storage follow Section 4.2 (Adjusting the Instrument) to make sure that the unit is ready for use. 5 MAINTENANCE The Oxor II needs to be calibrated at regular intervals to ascertain that it still meets its accuracy specification. A regular calibration schedule should be established. Detailed calibration, maintenance procedures and parts lists are provided in the Service Manual (19-9133). As a quick check of the instrument’s operation, perform a response check by exposing the instrument to a gas source which is depleted of Oxygen (e.g., cigarette smoke, a breath held for 15 seconds or more, smoke from a recently snuffed -out match, or bottled nitrogen). If the instrument doesn’t show a drop in the percentage of oxygen from that source, or if the reading is obviously in error, DO NOT use the instrument until it has been serviced by an authorized Bacharach Service Center. NOTE: DO NOT use this simple response check as a substitute for ensuring the instrument is properly calibrated. 6 6 6.1 Parts List Item Battery Cover Basic Probe/Hose Assy. Optional Probe/hose Assy. Part No. 19-3029 19-3086 19-3076 6.2 Bacharach Sales/Service Centers United States Bacharach, Inc. 621 Hunt Valley CircleNew Kensington, PA 15068Phone: 724-334-5051 Fax: 724-334-5723 E-mail: help@bacharach-inc.com Canada Bacharach of Canada, Inc. 250 Shields Court, Unit #3 Markham, Ontario L3R 9W7 Canada Phone: 905-470-8985 Fax: 905-470-8963 E-mail: bachcan@idirect.com Mexico Bacharach de Mexico Playa R...

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