Specifications

MODEL 300 COMBUSTION ANALYZER
5-10 Instruction 24-9223
5.4.2 Cleaning the Analyzer’s Sampling System
Equipment Needed
• Screwdriver, 1/4" Flat-Blade • Water
• Pipe Cleaners • Mild Detergent
• Jumper Wire with Alligator Clips • Clean Rag
Procedure
1. Turn off analyzer.
2. From rear of control panel, remove filter/trap from its quick-connect
socket, and unplug thermocouple connector.
3. Remove the sensor cover (see Section 4.1), and remove the O
2
, and CO
sensors. If the optional SO
2
and NO
X
sensors are installed, remove the
control panel using Section 4.1, and remove them. Temporarily con-
nect a jumper wire to the CO and optional SO
2
sensors terminals R
and S.
Important! In the following step, DO NOT remove the wires from the
CO or the Optional SO
2
sensors. If the electrical connections are
removed and then reconnected to these sensors, a restabilization time
period of up to several hours is required before the sensors stabilize (see
Section 5.7). The longer the sensors are disconnected from the analyzer,
the longer the restabilization period becomes.
NOTE: Since the analyzer has all sensors mounted in an upright
position, the sensor-mounting bracket that is located directly below the
O
2
and CO sensors must be removed from the front-panel assembly
before SO
2
and/or NO
X
sensor(s) can be removed.
4. Remove the control panel, if not already removed, (refer to Section 4.1)
and place it on a clean work surface.
5. Clean surfaces of oxygen sensor base and carbon monoxide expansion
chamber with a clean rag.
CAUTION:
DO NOT clean or disassemble the pump. The pump’s check
valves are delicate and may be damaged if cleaned.