Teledyne 320 Series - Portable oxygen detectors User Manual

Page 6

Teledyne Analytical Instruments

1-2

Model 320 Series

Chapter 1

1.2

Features

1.2.1

Multiple Sampling Modes

The 320 series detectors sample by diffusion in three different modes.

•

The probe assembly is mounted in the probe holder on the side of
the unit. The sample flows over the probe, using the accessory
flow-through adapter (P/N A9689).

•

This is done remotely by removing the probe assembly from its
holder and extending the coiled probe cable up to six feet.

•

An accessory probe mounting bar (P/N A8657) which is part of the
optional probe (P/N B16952) can be used to mount the probe in a
fixed position (remote location) if the application warrants at the
time of ordering the unit.

•

In the case of Model 320P, the analyzer's integral pump draws the
sample through the analyzer. If the sample is at a positive pressure,
it is not necessary to operate the pump.

1.2.2

Micro-Fuel Cell

The MFC carries a warranty that covers its normal life expectancy. How-
ever, far greater life expectancy can be achieved with the cell-saver feature.
The cell-saver is a sealing cap that keeps oxygen from the cell when the
instrument is not in use. With the cell-saver cap in place, the output drops
to less than 10% overnight and continues to drop as long as the cell-saver
cap remains in place.

1.2.3

External Output Capability

A simultaneous voltage output signal is available to supplement the
detector's integral meter. This permits indicating and/or recording the
oxygen level at a remote location.

1.2.4

Accessory Flow-through Adapter

The flow-through adapter designed for the Series 320 Portable Oxygen
Analyzers has radially and axially oriented flow-through hoses. The axial
inlet provides rapid purging of the dead volume at relatively low flow rates.
At high flow rates, the radial inlet is used.