Bacharach 300 Instructions Manual

Contents

Bacharach 300 Instructions Manual Manual pdf 51 page image

MODEL 300 COMBUSTION ANALYZERInstruction 24-9223 4-34.1 SENSOR AND/OR CONTROL PANEL REMOVALTo adjust potentiometers R9, R19, R24, POT1 & POT2, or to replace thesensors, the sensor and/or control panels must first be removed from thecase as follows:Equipment Needed• Medium Flat-Blade ScrewdriverProcedure1. Remove power from analyzer. If installed, fold down the Optionalauxiliary display panel. Remove water trap by pressing the release taband pulling on the trap (The water trap can remain attached to the airtubing). Disconnect the probe by removing the thermocouple connectorfrom the analyzer's receptacle. Set the probe/trap assembly aside.2. Remove sensor cover (Fig. 4-1) by loosening its three knurled screws.NOTE: Only two knurled screws are used with the battery poweredanalyzers. At this point the O 2 and CO sensors are accessible.If a printer is installed, remove the screw securing the printer to thecontrol panel with a screwdriver (Fig. 4-2). Lift the printer straight up,then back to disengage from keyhole retainers. Set printer in case.3. Remove the four screws securing the control panel (one located underthe printer ribbon cable) to the case (Fig. 4-3). If the unit is equippedwith an auxiliary panel, pull it straight up then turn it over and placethe panel in the bottom of the case so that it is facing the back.4. Tilt the control panel upwards so that the calibration pots and thefront panel keys (or the sensors) are accessible (Fig. 4-4).5. After the analyzer has been serviced, replace the control panel andauxiliary-display panel by reversing steps 1 thru 4.