Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 3.0 December 2003

1-3 IMPS 4000 (Optional)

Information on the IMPS 4000 is available in the IMPS 4000 Intelligent Multiprobe Test Gas Sequencer Instruction Bulletin.

1-4 SPS 4000 (Optional)

The SPS 4000 Single Probe Autocalibration Sequencer provides the capability of performing automatic, timed or on demand, calibrations of a single Oxymitter 4000 without sending a technician to the installation site.

a.Mounting

The SPS 4000 can be mounted either di- rectly to an Oxymitter 4000, to remote elec- tronics, or at a remote location if space is limited. In addition, the integrally mounted SPS 4000 can be configured for a horizon- tally or vertically mounted Oxymitter 4000 (Figure 2-3). The information in this instruc- tion bulletin will cover the integrally mounted units only. For information on remote mounted units, refer to the SPS 4000 Single Probe Autocalibration Sequencer Instruction Bulletin.

b.Components (Figure 1-9)

The SPS 4000 consists of a manifold and a calibration gas flowmeter. The manifold provides electrical feedthroughs and cali- bration gas ports to route power and signal connections and calibration gases to and from the sequencer. In addition, the mani- fold houses two calibration gas solenoids that sequence the gases to the Oxymitter 4000, a pressure switch that detects low calibration gas pressure, and two PC

boards. A terminal strip housed within the terminal cover provides convenient access for all user connections.

Components optional to the SPS 4000 include a reference air flowmeter and pressure regulator. The reference air flowmeter indicates the flow rate of reference air continuously flowing to the Oxymitter 4000. The reference air pressure regulator ensures the instrument air (reference air) flowing to the Oxymitter 4000 is at a constant pressure

[20 psi (138 kPa)]. The regulator also has a filter to remove particulates in the reference air and a drain valve to bleed the moisture that collects in the filter bowl.

Brass fittings and Teflon tubing are stan- dard. Stainless steel fittings and tubing are optional. Also, disposable calibration gas bottles are available as an option or can be purchased through a local supplier.

c.Operation

The SPS 4000 works in conjunction with the Oxymitter 4000’s CALIBRATION RECOM- MENDED feature to perform an autocalibra- tion. This feature automatically performs a gasless calibration check every hour on the Oxymitter 4000. If a calibration is recom- mended and its contact output signal is set for “handshaking” with the sequencer, the Oxymitter 4000 sends a signal to the se- quencer. The sequencer automatically per- forms a calibration upon receiving the signal. Thus, no human interface is required for the automatic calibration to take place.

Rosemount Analytical Inc. A Division of Emerson Process Management

Description and Specifications 1-9