AMI Sample Pump User manual

AMI
Fixed Pump Module Manual
AMI, Costa Mesa, CA

AMI Fixed Pump Module Page 1
Contents
Preface .................................................................................................................................................................................... 2
Contact Information................................................................................................................................................................ 2
Introduction ............................................................................................................................................................................ 3
System Components ............................................................................................................................................................... 4
Flow block ........................................................................................................................................................................... 4
Pump ................................................................................................................................................................................... 4
DC power supply ................................................................................................................................................................. 4
Installation and Operation ...................................................................................................................................................... 5
Receiving the Pump module ............................................................................................................................................... 5
Installation .......................................................................................................................................................................... 5
Mounting Location.............................................................................................................................................................. 6
Connecting Sample In and Out ........................................................................................................................................... 6
Protective Check Valve........................................................................................................................................................ 7
Electrical Connections............................................................................................................................................................. 8
Calibration Option For Connection to the Sample Inlet ......................................................................................................... 9
Two way Valve for Air Calibration....................................................................................................................................... 9
Warranty Information........................................................................................................................................................... 10

AMI Fixed Pump Module Page 2
Preface
Congratulations for purchasing the AMI fixed pump module. This unit is designed to be used with an AMI
analyzer such as the model 2010BR or “Watchdog” to add the capability of drawing a sample from a low
pressure or vacuum source.
The unit is approved for Class 1, Div 2, Groups C,D, Temp Code T6
Please read and understand this manual fully before attempting to use the instrument.
Contact Information
Advanced Micro Instruments
225 Paularino Avenue
Costa Mesa, CA 92626
[phone]
www.AMIO2.com
Last Revised: 03/12/2019

AMI Fixed Pump Module Page 3
Introduction
The fixed pump module is an auxiliary unit that is designed to be used with a standard AMI trace or percent
oxygen analyzer. The design of the fixed pump minimizes diffusion into the sample to prevent contamination by
atmospheric oxygen. Less than 1ppm of oxygen can be expected to be added to the sample by the pump. The
exact amount depends on sample flow rate and temperature.
Figure 1. System Schematic

AMI Fixed Pump Module Page 4
System Components
The fixed pump module contains three basic components.
Flow block
The flow block is a machined block of anodized aluminum that supports the input and output ports (normally,
¼” Swagelok fittings) connected to the pump.
Pump
The pump is a long life design that uses a brushless DC motor. It is close-coupled to the flow block using two
very short lengths of low-permeability, thick-walled Viton tubing.
The pump is capable of producing a pressure of approximately 28 PSI and a maximum flow rate of 4 SCFH
while drawing from ambient pressure. If drawing from a vacuum, the pump provides a 28 PSI differential.
DC power supply
The power supply is designed to operate off a voltage input of 10 to 24VDC (12VDC @ 1A )
Figure: Part Identification Diagram (X-ray view)

AMI Fixed Pump Module Page 5
Installation and Operation
Receiving the Pump module
When you receive the instrument, check the package for evidence of damage and if any is found, contact the
shipper.
Installation
Shown below is the mounting dimensions for installation of the fixed pump.
Figure: Mounting Hole Dimensions

AMI Fixed Pump Module Page 6
Mounting Location
The unit is not intended to be mounted outdoors. The enclosure is vented for safety reasons. If it is mounted
outdoors, provide some means of preventing rain from getting into the vent on the left side of the box.
The pump is not designed for freezing temperatures.
Connecting Sample In and Out
Run ¼” stainless steel line to the inlet of the module and a short length of ¼” line from the outlet of the module
to the inlet of the analyzer. When making connections, make sure the lines are free of burrs and the tubing is
smooth and clean. Push the tube all the way into the fitting, and tighten down the nut as far as you can by
hand. Then tighten it with 1 1/8 turns to make a good compression seal.
Be sure to pressurize the system and leak check all connections. Please see Calibration and Sample Fitting
options section for further information.
Note: If your installation has a potential to dead head the pump, we suggest you install a check valve between
the inlet and outlet ports. This will prevent damage to the pump diaphragm. (See Next page)
Figure: Plumbing Connection Illustration

AMI Fixed Pump Module Page 7
Protective Check Valve
A Check valve is to be used If you want to protect against potential "dead-heading" of the pump during operation or
calibration of your analyzer. If the sample becomes blocked /dead-headed, then the gas will flow from the sample Out
through the check valve then into the sample In. This will protect the pump until the dead-head is resolved.
Number
AMI P/N
Description
1
1FIT41
Fitting, Tee, 1/4T x 1/4Tx 1/4T, SS.
2
1GVC04
Check Valve, 10 psi Cracking Pressure, SS.
Figure: Calibration Gas Fittings
1
2

AMI Fixed Pump Module Page 8
Electrical Connections
The unit is designed for installation in either a general purpose or Class 1 Division 2 Group C,D area. It is
essential that the module's earth ground is connected to a high quality earth ground.
The unit is designed to operate off 10-24VDC. Connect the power wires to the terminals as shown above. A
conduit can be connected to either of the two conduit holes in the top or bottom of the box. The ground stud on
the main panel MUST be made to a good earth, with a resistance to ground of less than 1 Ohm.
An optional switch connection is provided to turn on and off the pump from a remote location.
Figure: Electrical connections
Earth Ground

AMI Fixed Pump Module Page 9
Calibration Option For Connection to the Sample Inlet
The following discusses a configuration to connect your calibration gas and sample gas to the sample pump.
Two way Valve for Air Calibration
The two way valve can be used If you use ambient air to calibrate your analyzer. The valve allows you to switch between
ambient air and sample system gas.
Number
AMI P/N
Description
1
1FCV03
Valve, 3 way, use for customer calibration
purposes
Figure: Air Calibration Fittings
1
Sample
Pump Sample In
Air
Schematic of the
Three Way Valve