Specifications

O Monitor 3010

8 Instruction 19-9208

2.9 Pump Operation (ppm Mode only)

Important! The restrictor (Figure 1, Item C) must be removed

for the pump to operate in the ppm mode; otherwise, the

monitor will automatically enter the auto-stablization mode

as described in Section 2.7.

With the monitor already switched ON, momentarily pressing the f3

button turns the internal pump ON. Pressing f3 again turns the pump

OFF. We recommend attaching the supplied particulate filter (Figure 1,

Item M) to the gas inlet connector whenever the pump is used. A cus-

tomer supplied

/16" I.D. sampling tube (not exceed 6 feet [1.8 m] in

length) can be connected to the top of the particulate filter for drawing in

gas samples from hard-to-reach locations.

Note: When switching the pump ON/OFF, a zero reading

may offset from 5–10 ppm, but will stabilize after a couple of

minutes.

Note that the internal pump is intended for use only at normal atmo-

spheric pressure, and is not designed to draw in gas samples against a

vacuum or an obstruction such as a kinked sampling hose. The pump is

capable, however, of pulling a gas sample against a restriction such as a

dryer filter. If an obstruction or negative-pressure gradient is present, then

gas will not be drawn into the monitor. Please consult the factory for

applications where longer sampling lengths are required, or where it is

necessary to draw against a vacuum.

2.10 Datalogging

The monitor automatically stores data in both the normal and TWA

modes at preset intervals. Although the time interval can be changed

using the optional BACH-COM software, we recommend that the logging

interval be kept at its factory setting for effective TWA calculations. The

monitor is capable of storing approximately 800 readings.

While in its datalogging mode, the monitor will continue to add readings

into memory at preset intervals. Each stored reading is the average

reading during that period—not a ‘snapshot’ at the end of the interval.

This ensures that no peaks in concentrations are lost, even if they occur

between storage periods. When the memory is full the oldest data will be

overwritten, so in normal use there is no need to clear the memory. If

desired, memory can be cleared using the optional BACH-COM software.