Specifications

CO2 Analyzer 2810/2815/2820

Instruction 19-9222

CO2 Analyzer 2810/2815/2820

Instruction 19-9222

2.3 Pump Operation (2815/2820)

With the analyzer already switched on, momentarily pressing the but-

ton switches on the pump. Pressing the button again turns the pump

off. The supplied sampling probe and hose assembly can be connected

to the gas inlet connector on the top of the analyzer for drawing in gas

samples from hard-to-reach locations.

Particulate filter P/N 54-0548 is placed on top of the gas inlet to prevent

dust or dirt from being drawn into the instrument. Replace the par-

ticulate filter about once a month, or when the filter is contaminated as

evidenced by a slower response time.

Note that the combined sampling hose and probe length should not

exceed 6 feet (1.8 m). Also note that the pump is intended for use only at

normal atmospheric pressure, and is not designed to draw in gas samples

against a vacuum or an obstruction such as a kink in the sampling hose.

If an obstruction or negative-pressure gradient is present, then gas will

not be drawn into the analyzer. Please consult the factory for applica-

tions where longer sampling lengths are required, or where it is neces-

sary to draw against a vacuum.

2.4 Pump Contamination (2815/2820)

Over time the pump can become contaminated, leading to a slower

response time and lower readings. To check for pump contamination,

turn on the pump and hold your index finger over the inlet fitting. The

pump should normally stall. If the pump, however, continues to run,

then the pump is contaminated and the analyzer needs to be returned to

Bacharach for repair.

2.5 High Humidity Gas Sampling (2820)

When using the 2820 to draw in gas samples from areas with high levels

of humidity (e.g., incubators with water jackets), install both particulate

filter P/N 54-0548 and desiccant filter P/N 07-1645 on the analyzer by

first connecting the particulate filter to the analyzer’s inlet. And then

connecting the desiccant filter to the particulate filter using a 2–3 inch

piece of rubber tubing (cut from the tubing supplied with the analyzer).

Use the remaining piece of tubing to connect to the incubator.

After completing a test, continue to run the pump while sampling fresh

air until the reading is below 0.1. This will purge out any residual CO

before proceeding to the next test.