BEAMEX POC8 User Manual

Beamex® POC8

AUTOMATIC PRESSURE CONTROLLER

User Manual

Dear user,
We have made every effort to ensure the accuracy of the contents of this manual.

Should any errors be detected, we would greatly appreciate to receive suggestions
to improve the quality of the contents of this manual.

The above notwithstanding, we can assume no responsibility for any errors in this
manual or their eventual consequences.

We reserve rights to make modifications to this manual without any further notice.
For more detailed technical data about the Beamex® POC8 Automatic Pressure

Controller, please contact the manufacturer.

© 2017
BEAMEX OY AB
Ristisuonraitti 10
FIN-68600 Pietarsaari
FINLAND
Tel +358 - 10 - 5505000
Fax +358 - 10 - 5505404
E-mail: [e-mail]
Internet: https://www.beamex.com

8888500 / POC8uEng / Version 1.0a

This Warning symbol indicates that danger of injury for persons and the
environment and/or considerable damage (mortal danger, danger of injury)
will occur if the respective safety precautions are not taken.

This Caution symbol indicates danger for the system and material if the re­spective safety precautions are not taken.

This Notice symbol does not indicate safety notices but information for a
better understanding of the facts.

Contents

Contents

General Information ................................................................ 1

FCC Radio Frequency Emission Notice .................................... 1

Trademarks ................................................................................ 1

Packaging for Shipment ............................................................. 1

Safety Notices ......................................................................... 2

User Responsibilities ................................................................. 2

General Safety Notices .............................................................. 2

Warnings and Caution Notices .................................................. 3

General Description ................................................................ 4

Features ..................................................................................... 4

Turning On ................................................................................. 5

Front Panel ................................................................................ 6

Power Switch ..................................................................... 6

USB Port ............................................................................ 6

Display ....................................................................................... 7

Chassis Assembly ...................................................................... 8

Specifications ......................................................................... 9

Measure Specification ................................................................ 9

Control Specifications ................................................................ 9

General Specifications ............................................................. 10

Beamex® POC8 Automatic Pressure Controller

Contents

Installation ............................................................................ 11

Unpacking the Instrument ........................................................ 11

Dimensions in mm / inches ...................................................... 12

Mounting .................................................................................. 13

Rear Panel ............................................................................... 13

Pressure Connections ...................................................... 13

Supply Port ...................................................................... 14

Exhaust Port .................................................................... 14

Vent Port .......................................................................... 14

Measure/Control Port ....................................................... 14

Reference Port ................................................................. 14

Barometric Reference Port .............................................. 14

Remote Communication Connections ............................. 14

Power Up ......................................................................... 14

Local Operation and Setup .................................................. 15

General Operation ................................................................... 15

Setup ............................................................................. 15

Display Screen Features .................................................. 15

Initial Setup .............................................................................. 16

Contact and Version Information View............................. 16

Language Selection ......................................................... 16

Settings View's' Parameter Inputs ........................................... 17

Main Functions ......................................................................... 18

Home View ....................................................................... 18

Settings View ................................................................... 26

Control Settings ............................................................... 30

Display Settings ............................................................... 35

Programs ......................................................................... 37

Favorites View ................................................................. 38

Information View .............................................................. 39

Troubleshooting View ...................................................... 40

Remote Settings View ...................................................... 41

Step Settings View ........................................................... 43

Leak Test ......................................................................... 45

Burst Test ......................................................................... 46

Service View .................................................................... 47

Unlocked Service View .................................................... 48

Beamex® POC8 Automatic Pressure Controller

Contents

Remote Operation ................................................................. 49

Command Set .......................................................................... 49

Operation with Beamex calibrators .................................. 49

IEEE-488 .................................................................................. 50

IEEE-488.2 Commands ................................................... 50

Ethernet ................................................................................... 51

USB device (Virtual Serial Port) ............................................... 51

Serial ........................................................................................ 52

Serial Cable Requirements .............................................. 52

Command and Query Format .................................................. 53

Command Set Definitions ........................................................ 53

Output Formats ........................................................................ 54

Commands and Queries .......................................................... 55

Beamex default command set ......................................... 55

Units Command Syntax for Measurement Units .............. 62

Error Codes ...................................................................... 63

SCPI Commands and Queries ......................................... 63

GPIB Capability Codes .................................................... 65

GPIB Capability Codes .................................................... 65

Interface Functions .......................................................... 66

USB Software Upgrade............................................................ 67

Options .................................................................................. 68

Barometric Module ................................................................... 69

Gauge Pressure Emulation .............................................. 69

Absolute Pressure Emulation ........................................... 69

Emulation Mode Accuracy ............................................... 69

Calibration of the Barometric Module ............................... 69

Specifications of the Barometric Module .......................... 69

Additional measurement modules ........................................... 70

Secondary measurement module installation .................. 70

Bench Mounting Kit .................................................................. 70

Fittings ..................................................................................... 70

Re-calibrating ........................................................................... 71

Dirt and Moisture Trap ............................................................. 71

Beamex® POC8 Automatic Pressure Controller

Contents

Maintenance .......................................................................... 72

Removing the measurement module ....................................... 72

Troubleshooting ....................................................................... 73

Calibration ............................................................................. 74

Environment ............................................................................. 74

Pressure Standards ................................................................. 74

Media ....................................................................................... 74

Service View (unlocked) .......................................................... 75

Calibration Data ....................................................................... 76

One Point Calibration ............................................................... 76

Two Point Calibration ............................................................... 77

Linearization ............................................................................. 78

Head Pressure ......................................................................... 80

Appendix ............................................................................... 81

Measurement Units .................................................................. 81

Conversion Factors, PSI .......................................................... 82

Conversion Factors, millitorr .................................................... 83

Conversion Factors, Pascal ..................................................... 84

Beamex® POC8 Automatic Pressure Controller

Feedback

Feedback

We want to improve our products and services constantly. Therefore we’d

like to know Your opinion of the product You use. Please spend a moment of
Your valuable time in filling this form. All respondents will receive a surprise
gift in return.

Certain questions can be answered immediately after receiving the product.
Others require some use of the product before You are able to answer them.
The best way to fill the form is to answer the items as it applies, and send the
form to us when all items are answered. There are however no definite re­strictions; fill in the form when you feel like it (all items need not be an­swered). Then send it to Beamex using one of the possibilities listed below.

Mail: Beamex Oy, Ab

Quality Feedback
P.O. Box 5
68601 Pietarsaari
FINLAND

Fax +358 - 10 - 5505404
Only the next page need to be faxed to us.

Internet: https://www.beamex.com

A similar form is available as a web page

E-mail: [e-mail]

Refer to the numbered items on the next
page in Your e-mail message.

Beamex® POC8 Automatic Pressure Controller

Feedback

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Address: _____________________________
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 Please contact me concerning the

Feedback I have given.

 I want to receive more information on

Beamex products.

1. Name of the product you give feedback of: _____________

2. Serial number and software version number (if applicable) _____________
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3. Any comments when receiving the product. Did the package contain all required items and
was it as expected?

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4. For how long have you been using the product? _____________

5. How helpful was the manual in using the product?
(Tick a box in the percentage scale below)

6. How well did the product suit your needs?

7. How satisfied are you with the product?

8. Did anything in the product exceed your expectations? In that case, what was it?

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___________________________________________________________
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10. Any ideas You want to propose to Beamex so that we can improve our products, operations
and/or services.

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Beamex® POC8 Automatic Pressure Controller

General Information 1

General Information

FCC Radio Frequency Emission Notice

This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protec­tion against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful in­terference in which case the user will be required to correct the interference at his or her own
expense.

Use shielded cables to connect external devices to this instrument to minimize RF radiation.

Trademarks

Beamex is a registered trade mark of Beamex Oy Ab.

Packaging for Shipment

If the product must be shipped to a different location or returned to Beamex for any reason
through a common carrier it must be packaged properly to minimize the risk of damage.

The recommended method of packing is to place the instrument in a container, surrounded on
all sides with at least 100 mm / four inches of shock attenuation material such as styrofoam
peanuts.

Beamex® POC8 Automatic Pressure Controller

2 Safety Notices

The system should only be operated by trained personnel who are familiar
with this manual and the operation of the instrument.

A condition for trouble-free and safe operation of this system is proper
transport, proper storage, installation, assembly and proper use as well as
careful operation and maintenance.

Any operation not described in the following instructions should be prohib­ited. The system must be handled with care required for an electronic preci­sion instrument (protect from humidity, impacts, strong magnetic fields,
static electricity and extreme temperatures). Do not insert any objects into
the instrument.

The system is powered via the power cable with a voltage that can cause
physical injury. Even after disconnecting the system from the power supply,
dangerous volt- ages can temporarily occur due to capacitance.

Extreme care must be taken with pressure connections when using hazard­ous or toxic media.

Repairs must only be performed by authorized service personnel.

Additional safety notices are found throughout this manual.

Safety Notices

User Responsibilities

To ensure safety, the user must make sure that:

 The system is used properly, no dangerous media are used and that all technical specifi-

cations are observed.

 The system is operated in perfect operating condition.
 This operation manual is legible and accessible to the user at the system’s location.
 The system is operated, serviced and repaired only by authorized and qualified person-

nel.

 The operator receives instruction on industrial safety and environmental protection, and

is knowledgeable of the operating instructions and the safety notices contained therein.

General Safety Notices

Beamex® POC8 Automatic Pressure Controller

Safety Notices 3

HIGH PRESSURE! High pressure gases are potentially hazardous. Energy
stored in these gases and liquids can be released suddenly and with ex­treme force. High pressure systems should be assembled and operated only
by personnel who have been trained in proper safety practices.

NOT EXPLOSION PROOF! Installation of this instrument in an area requiring
devices rated as intrinsically safe is not recommended.

POSSIBLE INJURY! The tubing, valves, and other apparatus attached to the
gauge must be adequate for the maximum pressure which will be applied,
otherwise physical injury to the operator or bystanders is possible.

USE THE PROPER PRESSURE MEDIUM! Use only clean, dry, non-corrosive gases.
This instrument is not designed for oxygen use.

HIGH SOUND LEVELS! Pressures from 70 bar / 1000 psi and up can generate
sound levels above 80dbA for brief period when they are exhausted directly
to atmosphere. A muffler/ snubber is installed in the vent port. Removal of
muffler/ snubber will allow for sound levels to exceed 80dbA.

As with most sensitive electronic equipment, switch the power switch off
before connecting or disconnecting to a power source to prevent data loss.
Do not position the equipment so that it is difficult to disconnect the power
jack.

WARNING: Detachable main power supply cord with inadequate ratings should not
be used. See Section 4.0 - Specifications for power ratings.

CAUTION! ESD PROTECTION REQUIRED. The proper use of grounded work
surfaces and personal wrist straps are required when coming into contact
with exposed circuits (printed circuit boards) to prevent static discharge to
sensitive electronic components.

Warnings and Caution Notices

Additional Warning and Caution notices are found throughout this manual.

Beamex® POC8 Automatic Pressure Controller

4 General Description

General Description

POC8 is a bench top or rack mounted Pressure Controller used for test and calibration of me­chanical pressure gauges, sensors, transducers, transmitters and any pressure related devices
where time to set point is a critical requirement.

POC8 can have up to two highly stable precision pressure measurement modules and an op­tional barometric module.

POC8 Desk top version.

Features

 Up to two highly stable, temperature compensated, internal pressure measurement mod-

ules.

 Broad operating pressure range from -1 barg / -15 psig to 210 bar / 3 045 psig
 Accuracy 0,02% FS.
 An optional removable / interchangeable internal high accuracy barometric module

providing gauge pressure emulation for absolute ranges and absolute pressure emula­tion for gauge ranges.

 Auto-ranging between the two measurement modules to provide seamless transition be-

tween all ranges.

 7” Color LCD display with touch screen.
 Leak test and burst test.
 Multiple languages; change the language for on-screen text and number/date formats by

simply touching one of the “national flag” icons available in the setup screen.

 Desk top or bench mount
 Local Operation, or command and read remotely.

Beamex® POC8 Automatic Pressure Controller

General Description 5

Earth Ground!
Any power adaptors or surge protection devices that negate the protective
earth ground should not be used. The power cord must be accessible and
contain a protective earth ground.

Ventilation!
Do not block airflow to ventilating fans located on rear of instrument.

Turning On

Apply power to the power connector on the rear of the instrument with the included power cord,
remove any plastic plugs from the rear panel pressure ports, and press the power switch to ON.
The system will go through an initialization process, which takes about 30 seconds, and then a
display will appear similar to the screen shown below.

Power button highlighted.

To see information about the configuration of your new POC8, touch the Next Page Button
[ ] then the Information view icon [ ] on the menu and a window will appear listing the
Beamex customer service contact, model number and the modules that are installed. Press the
Previous Page Button [ ] then the Home view [

] to return to the main screen.

Information view button highlighted.

Beamex® POC8 Automatic Pressure Controller

6 General Description

If power to the instrument is interrupted while ON it will shut down until the
power is restored, then immediately resume operation.

Front Panel

The POC8 front panel includes a 7” color LCD display with touch screen. Operator input is ac-

complished by pressing the words or symbols and the button icons presented on the display.
There is a single discrete on/off button and a USB port on the right hand side.

Power Switch

The power switch is a two-state device with an action similar to that of a ball point pen. Push the
button with enough force to latch it in to turn the unit ON. Push it again to release it to turn the
system OFF.

USB Port

The front panel USB port acts like the Host USB and is intended for software upgrades.

Beamex® POC8 Automatic Pressure Controller

General Description 7

Active module range

Optional Zero or Tare

Current value

Optional bar graph

Units and Mode

Auxiliary Displays

Operating Modes

Operating Screen Buttons

Display

The display is made up of two sections. In the main screen (“Home view”), the left side shows
the operating screen with the control channel. The control channel displays the active pressure
reading, units, mode (absolute or gauge), active range of the internal measurement module,
pressure control setpoint, a bar graph (if enabled), a zero or tare button (if enabled) and any
auxiliary displays that have been chosen. The right side of the screen has button icons for gen­eral instrument settings, control settings, display settings, program settings, favorites plus a “Next
Page” button [ ] that, when pressed, shows a second and third page of icons for information,
troubleshooting, remote communication, step setting, leak test, burst test and service applica­tions.

Buttons, Labels and Windows: The touch screen has many buttons with relevant graphic
icons or text which, when pressed, will open a related window where changes can be made or
information viewed. Some of these buttons will toggle from one state to another, others present
choices or display a numerical data entry screen. Text or icons that are displayed, but do not re­spond to being touched, are called labels or windows. Operators will quickly become accus­tomed to the particular characteristics of the frequently used buttons.

Main Screen: The main screen or “Home view”, appears after power-up. This screen contains
the operating screen and buttons. It will remain as configured after a power cycle.

Operating screen: The operating screen (left side of the screen) contains information relevant
to the measurement. Up to three auxiliary displays can be shown simultaneously along with the
current pressure value. The operating mode of the instrument can be selected and changed in
this screen between “Measure”, “Control” and “Vent”.

Beamex® POC8 Automatic Pressure Controller

8 General Description

Chassis Assembly

The chassis assembly is the housing for the system. The pressure measurement modules are
self-contained inside the chassis and can be replaced using basic hand tools. The picture below
shows the top view of the chassis with the cover removed.

Chassis assembly.

The heart of the chassis assembly is referred to as the “Controller Unit”. They are available in
three variations depending on the working pressure range:

 -1 to 10 barg / -15 to 150 psig
 -1 to 100 barg / -15 to 1 500 psig
 -1 to 210 barg / -15 to 3 045 psig

Each chassis includes platforms for up to two high performance pressure measurement mod­ules, which are traceable to international standards. Both of these modules can be used in con­junction with the highly stable controller unit to produce a precise output. Each measurement
module includes its own on-board compensation and calibration data so that any module can be
replaced in the instrument without requiring a recalibration.

Pressure Measurement Module.

Beamex® POC8 Automatic Pressure Controller

Specifications 9

Specification

POC8

Pressure ranges /
Pressure Measurement Modules

Barometric, measuring range: 552 … 1 172 mbar abs / 8 … 17 psi abs*
± 350 mbarg / ± 5 psig
± 1 barg / ±14.5 psig

-1 to 6 barg / -14.5 to 87 psig

-1 to 20 barg / -14.5 to 290 psig

-1 to 100 barg / -14.5 to 1 450 psig

-1 to 210 barg / -14.5 to 3 045 psig
Special range within -1 to 210 bar / -14.5 to 3 045 psi

* The barometric module can be used to switch pressure types, absolute <=>

gauge. With gauge pressure modules the measuring range of the module must
begin with -1 bar / -15 psi in order to carry out a complete absolute pressure
emulation.

1 year uncertainty*

0.02 % of span.
For barometric module : 0.02% of reading
* Uncertainty includes reference standard uncertainty, hysteresis, nonlinearity,

repeatability and typical long term stability for mentioned period (k=2).

Pressure types

Absolute and gauge or bi-directional ranges

Recommended Calibration Interval

365 days

Reading rate

33 readings/second

Wetted Parts

Aluminum, Brass,316 and 316L stainless steel, Buna N, FKM/FPM, PCTFE,
PEEK, PTFE, PPS, PAI, Glass-filled Epoxy, RTV, Silicone, Silicone grease, Ure­thane

Specification

POC8

External Source Requirements

10% over range or 1.38 bar / 20 psi over the highest measurement module,
whichever is less:
min. 0.34 bar / 5 psig
max. 211 bar / 3 060 psig

External Exhaust Requirements

Vacuum source required for sub atmospheric control

Stability of Controlled Pressure

0.005% of full scale of the active range, typically better than 0.002% of span af­ter 10 sec after displaying stable pressure

Minimum Control Pressure

0.05% FS or 1.72 mbar / 0.025 psi over exhaust pressure,
whichever is greater

Maximum Control Pressure

Available Controller Units (one of the listed pre-installed inside the unit):

-1 to 10 barg / -15 to 150 psig

-1 to 100 barg / -15 to 1 500 psig

-1 to 210 barg / -15 to 3 045 psig

Pressure Control Modes

Fast, medium, slow and variable

Pressure Control Rates

0.05% FS/sec to 10% FS/sec into a 50 ml volume

Stability of Rate Control

+/- 10% of rate setpoint, down to +/- 0.001% of span of active range per sec

Control Time

10 s (regarding a 10% FS pressure increase in a 50 ml test volume)

Overshoot

< 0.3% FS in fast control mode (typical < 0.01% FS in slow control mode)

Supply Consumption

< 70.8 l / < 2.5 standard cubic feet per hour in steady-state control

Test Volume

0 to 1000 ml; The controller auto compensates volumes from 0 to 500 ml

Specifications

Measure Specification

Control Specifications

Beamex® POC8 Automatic Pressure Controller

10 Specifications

Specification

POC8

Instrument Version

Standard: desktop case
Optional: bench mounting kit

Dimensions

See technical drawings

Weight

Approximately 12.7 Kg / 28 lbs. with all internal options (desktop case)

Warm up Time

Approximately 15 minutes

Screen

7” color LCD display, resistive touchscreen

Resolution

4 … 6 digits depending on range and units

Pressure units: Metric

Metric:

mbar, bar, Pascal, hPa, kPa, MPa, mmH2O@4˚C, cmH2O@4˚C, mH2O@4˚C,
mmH2O@ 20˚C, cmH2O@20˚C, mH2O@20˚C, mSV, mmHg@0˚C,
cmHg@0˚C, mHg@0˚C, Torr, mTorr, Dyn/cm2, g/cm2, kg/cm2

Imperial:

psi, inHg@0˚C, inHg@60˚F, inH2O@0˚C, inH2O@20˚C, inH2O@60˚F,
ftH2O@4˚C, ftH2O@20˚C, ftH2O@60˚F, inSW. Osi, psf, tsi tsf, ftSW, Torr,

mTorr, % of range, atm

Pressure units user defined

2 (multiplier from psi or Pascal)

Languages

English, French, German, Italian, Spanish, Polish, Portuguese, Russian, Chi­nese, Japanese, Korean

Measurement Filters

Off, Low, Normal (default), High

Pressure ports

4 ports with 7/16”- 20 F UNF including adapters to Beamex low/high pressure
hoses (vacuum and pressure supply hoses are included)
Optional Barometer: 10-32 UNF female port

Filter Elements

Filter element (40 micron) included in each pressure port

Permissible Pressure Media

Clean dry non-corrosive gases (ISO8573-1:2010 Class 5.5.4 or better)

Overpressure Protection

Safety relief valves are set to protect each internal pressure module

Power Supply

100 – 120 or 200 - 240 VAC, 50 Hz / 60 Hz, 120 VA Max

Storage Temperature

0 ... 70 °C / 32 ... 158 °F

Operating Temperature / Compensated
Temperature Range

15 … 45 °C / 59 ... 113 °F

Humidity

5 … 95 % r. h. (relative humidity, non-condensing)

Mounting Position

Horizontal

Digital Interface

Standard: Ethernet, IEEE-488, USB, RS-232.
Only the USB interface is supported with Beamex products.

Response Time

100 ms

EU Declaration (CE mark)

Conformity certificate

Calibration

Accredited Calibration Certificate included

This is class A equipment for emissions and is intended for use in industrial envi­ronments. In other environments, e.g. residential or commercial installations, it can
interfere with other equipment under certain conditions. In such circumstances the
operator is expected to take the appropriate measures.

General Specifications

Beamex® POC8 Automatic Pressure Controller

Installation 11

READ THESE INSTRUCTIONS BEFORE INSTALLATION!

Installation

Unpacking the Instrument

In addition to functional testing, each unit is inspected for appearance prior to leaving the fac­tory. Upon receipt, please examine the instrument for shipping damage. Report any apparent
damage to the carrier immediately.

The following items are included in the standard delivery:

 POC8 Automatic Pressure Controller
 Calibration certificate
 This User Guide
 Power Cord
 Vacuum connection hose and connectors
 Supply pressure connection hose and connectors

Beamex® POC8 Automatic Pressure Controller

12 Installation

Dimensions in mm / inches

Front view, standalone instrument.

Side view, standalone instrument.

Front view, rack mounted instrument.

Beamex® POC8 Automatic Pressure Controller

Installation 13

The pressure connections must be installed according to the following in­structions, observing the relevant regulations. The installation is to be per­formed by trained, authorized personnel, knowledgeable in the safety regu­lations for working on pneumatic/hydraulic systems.

Five pressure connections are on the rear panel. Plugged connections are
not used.

Mounting

The instrument can be set up on a desk top or it can be rack-mounted. Rack mount hardware is
optional on the POC8 (see chapter Dimensions in mm / inches on page 12 and Options on
page 68).

The measurement modules are relatively insensitive to tilt and vibration. However to further as­sure stability and accuracy, avoid mounting the instrument on surfaces subject to excessive mo­tor or machinery vibration.

Rear Panel

Five pneumatic pressure ports are located across the rear panel. Any instrument containing
sub-atmospheric pressure ranges needs a vacuum pump to be connected at the exhaust port.
The instruments with pressures above or at atmospheric pressures will have the exhaust port
open. Next to the ventilation fan is a 10-32 UNF fitting which is connected to the barometric
module if installed. Positioned on the right side is a remote communication connections; RS­232, Ethernet, IEEE- 488, USB along with the USB host connection.

Rear Panel.

Pressure Connections

All pressure ports on the rear apart from the Vent Port are female 7/16” - 20 F UNF. Beamex
provides pressure connectors and vacuum and supply hoses with the device. Pressure hoses
for output pressure are optional accessories. Do not use sealant on fittings sealed with an
o-ring. The integrity of each seal is particularly important since even microscopic leaks can
cause errors in pressure measurements.

Beamex® POC8 Automatic Pressure Controller

14 Installation

Supply Port

The pressure supplied to the pressure connection labeled “Supply” should be approximately

10% higher than the full scale of the highest pressure transducer installed in the controller (see
chapter Contact and Version Information View on page 16).

Exhaust Port

The pressure connection labelled “Exhaust” is for the vacuum supply. In a gauge pressure ver­sion it can be left open to atmospheric pressure.

Vent Port

The pressure connection labelled “Vent” is the exhaust port where the system pressure is

vented to the atmosphere under certain conditions. This port has a breather vent installed that
acts like a muffler. Leave this port open.

Measure/Control Port

The Measure/ Control port (when in the Control mode) supplies pressure that is precisely con­trolled by the controller. In the Measure mode a pressure applied to the Measure/Control port is
measured by the internal measurement modules.

Reference Port

The pressure connection labeled “Reference” is the reference port, it is available to connect to

the reference side of the sensor. This port is normally left open to atmosphere but may be con­nected to a stable reference pressure. For an absolute pressure measurement module this port
can be plugged.

Barometric Reference Port

The Barometric Reference port is connected to the optional internal barometer module and
should be left open to atmospheric pressure.

Remote Communication Connections

See chapter Remote Operation on page 49 for connections and commands for operation over
IEEE-488, Ethernet, USB or RS-232 ports.

Power Up

Apply power to the power connector on the rear of the instrument using the power cord in­cluded, and switch the power switch on the front of the unit ON. The instrument will go through
an initialization process and system check. As soon as the system check is completed the sys­tem will default to a screen similar to the one shown in chapter Display Screen Features on
page 15. The main screen may be configured in many different ways but initially it will be in a de­fault configuration. Subsequently, the unit will power up in the configuration that it was in when
last powered off. Allow at least 15 minutes of warm up before performing critical pressure meas­urements.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 15

Active module range

Optional Zero or Tare

Current value

Optional bar graph

Units and Mode

Auxiliary Displays

Operating Modes

Operating Screen Buttons

Local Operation and Setup

General Operation

This section describes the procedures for operating the POC8 from the front panel. Instructions
for operating the device remotely from an external computer are covered in Remote Operation
on page 49. By following the procedures provided in these two chapters and chapter Calibra-
tion on page 74, you can expect your POC8 to deliver maximum accuracy and dependability for
many years of useful service.

Setup

Configuration is achieved by changing settings accessed through the buttons on the right. Local
operation is accomplished by observing the data presented in the display. The appearance and
functionality of the display can be changed by pressing corresponding button for the related
function. After a button/function has been chosen, a set of related parameters will appear. After
choosing one of these parameters, a set of selections related to that parameter will appear or a
data entry keypad. The desired selection or data can be entered here.

Display Screen Features

The screen shown below provides an overview of the features shown on the display after initiali­zation. The left side of the display contains the area where information is displayed (in this case
the Home view) and the right side contains the buttons for settings and other functions. A zero
or tare button, bar graph and auxiliary displays (rate set point, control rate, peak values & units)
will appear in the Home view, if activated. All of the screen features are described in more detail
throughout this manual. The active button is represented in a lighter gray color as compared to
the other buttons.

Display Screen Features.

Beamex® POC8 Automatic Pressure Controller

16 Local Operation and Setup

Initial Setup

Chapters Contact and Version Information View and Language Selection further down on
this page are provided first so that the operator can initially check the information screen to ver­ify the installed components and to change the language if needed.

Contact and Version Information View

Navigate to the view selection area by pressing the Next Page button [ ] at the right bottom
under the buttons on the right. This gives access to the second page of the button selection
area. Press the Information view button [ ] to display Beamex contact, installed pressure
control unit and pressure measurement modules along with instrument and software version in­formation.

Information.

Language Selection

Pressing the settings button [ ] will open a screen where the language, display brightness,
volume, user base units/multiplier and configuration loading/saving, can be changed. The cur­rent language selections available are shown in the table below. Additional language choices
will appear on the screen after pushing the current language selection and then Next Page but­ton [ ]:

Language Selection.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 17

Window title Menu Button Input Title

Settings Views' Parameter Inputs

The Settings view's input area on the right one fourth of the screen (see chapter Display
Screen Features on page 15) is the area where setup, information, calibration, service and

other functions can be chosen. Multiple pages of selections can be accessed by pressing the
Next Page button [ ] or by pressing the Previous Page button [ ]. A series of horizontally
placed circles on the bottom right represents the number of pages and indicate the active page
by a larger circle. As a function is chosen, related parameters will appear on the left side of the
screen along with the name of the function, and a reduced size icon in the top title section.
When a parameter is chosen, related selections, sliding scales or a data entry key pad will ap­pear in the input area on the right where the buttons were previously displayed. An example of
each type of input is shown below. To return to the main view's buttons, simply press the Menu
button [ ] above the input area. The purpose and use of each selection and menu is intui­tively apparent and will become second nature with minimal exposure to the menu structure.

Settings Views.

Beamex® POC8 Automatic Pressure Controller

18 Local Operation and Setup

Main Functions

Home View

The Home view [ ] is the normal operation screen. This view is different from the others in
that it is not used to setup the configuration but is used to monitor the pressure applied to the
installed measurement modules and the device under test through the measure / control port.

The "Home view" picture shows the basic Home view in an instrument. The user can change
the display to show multiple auxiliary displays by pressing the auxiliary button on the left corner
of the screen ("Single channel display" picture). The Units button is always displayed. When the
Units button is pressed a selection of imperial and metric units will be displayed on the right
("Pressure units" picture); notice that the Units button has a lighter background when the selec­tion menu is active. If a barometric reference is installed, the Mode button, described below, will
toggle from Gauge to Absolute mode when pressed.

Home view.

Single channel display. Pressure units.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 19

Range Hold / Autorange

The Range Hold / Autorange button allows the user to select the active range. By clicking the
Range Hold button, the user can select the active measurement module from the primary and
secondary modules or utilize the “Autorange” feature to let the instrument automatically select
the active range based on the current pressure value.

Range Hold button highlighted.

Control Setpoint

The Setpoint button allows the user to enter the desired pressure value to be controlled by the
POC8. There are multiple ways of entering the control setpoint; numeric keypad, step incre­ments, percentage entry, digital step or a program data entry. These methods can be accessed
by the user by pressing the “Setpoint” button and the various setpoint entry methods can be
navigated with the Next Page [ ] and Previous Page [ ] buttons.

Setpoint button highlighted.

Beamex® POC8 Automatic Pressure Controller

20 Local Operation and Setup

Numeric Keypad

The first entry method provides 10 digits for numeric entry, plus the decimal point and a sign
key (see picture below). The sign key [+/-] will toggle between positive and negative values.
Each stroke on the key pad will echo in the blue input value window above the pad. A change
between plus and minus values [+/-] can be entered at any time during the string entry. Pressing
the Enter [ ] button will accept the value and it will become the setpoint.

If the input window holds an illegal value when the Enter button is pressed the system will re­spond with an error tone and the entry will turn red. When that happens determine the cause of
rejection, delete the entry using the Delete [ ] button and then enter a valid number. The
setpoint can only be entered within the minimum and maximum control range set in chapter
Control Limits on page 33. These limits are shown above the numeric entry keypad.

Numeric Keypad Setpoint Entry. Min. & Max. setpoint values highlighted.

Step Increments

The second entry method allows the user to enter the setpoint in the same way as the Numeric
Keypad by keying in the value and then pressing the Enter [ ] button. The user can then en­ter the desired value of step increment and press the Step Up [ ] or Step Down [ ] but­ton, without pressing the Enter button. This number will then be used to decrease or increase
the existing setpoint value. Subsequent touches of the Step Up or Step Down button will con­tinue to increase or decrease the setpoint by the step value. If the Enter button is pressed the
newly entered value will register as a new setpoint value on the Home Screen rather than a step
value.

Numeric Keypad Setpoint Entry. Step increment buttons highlighted.

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Local Operation and Setup 21

Percentage Entry

The third entry method is the Percentage Entry method (see leftmost picture below) which al­lows the user to select a setpoint value as a percentage of the pressure range of device under
test (DUT). The user can choose between various percentage values by clicking on the desired
button. The setpoint will instantly change to the selected percentage value of the DUT. The user
can also configure the minimum and maximum pressure values of the DUT by clicking the but­ton displaying pressure range. This would take the user to the Step Settings view (see rightmost
picture below) which is explained in section Step Settings.

Percentage Entry window. Entering maximum range.

Digital Step Entry

The fourth entry method is the Digital Step data entry method. This method allows the user to
increase or decrease the setpoint value by one digit at a time. The digit to be changed can be
selected from a string of five zeroes (0) and one green numeral one (1) by sliding a finger
across the zeroes and converting the desired digit to a green 1. The right most digit in the Digi­tal Step corresponds to the least significant digit of the setpoint. Each digit of the setpoint can
then be increased or decreased by pressing the Up [

] or Down [ ] button.

Digital Step Entry.

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22 Local Operation and Setup

Program Data Entry

The fifth entry method is through the automated Programs stored in the memory. The Program
Player allows the user to select one of the stored Programs and use it for setpoint entry. A Pro­gram can be chosen by using the Up [ ] or Down [ ] buttons. After selecting the desired
program, press the Play [ ] button to start the program. More information on the Program
Player and how to create/ edit programs is available in chapter Programs on page 37.

Program Data Entry.

Units and Pressure Type

The Units button is always displayed. When the Units button is pressed a selection of imperial
and metric units will be displayed on the right (rightmost picture below).The pressure Type but­ton is only active if there is an optional barometer module installed. Otherwise, the Type button
becomes a label (leftmost picture below) indicating the native pressure type of the channel (ab­solute or gauge). When an optional barometer module is installed, a native gauge module can
emulate absolute pressure using the barometric reference. Alternatively, a native absolute mod­ule can emulate gauge pressure. Emulation can be activated simply by pressing the pressure
Type button.

Pressure Pressure
Units button Type button

Units list opened. No barometric module.

Bar Graph

An optional bar graph can be displayed below the current pressure value. The bar graph indi­cates the position of the current value with the maximum range of the primary measurement
module in that channel. This bar graph will appear in the Home view when selected from the
Display Settings presented on page 35.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 23

Auxiliary Displays

The screen in the uppermost picture below shows all of the possible auxiliary display items that
can be included in the Home view. The Home view can have up to three auxiliary displays
which can be chosen by clicking on each button and then selecting the display item from the
menu on the right side of the screen (the lowermost picture below).

Home view with auxiliary displays.

Auxiliary display selection.

Each auxiliary display can be modified by pressing the displayed button.
Peak: Pressing the Peak button will reset the upper and lower peak value to the current reading,

subsequent negative or positive divergence from that reading will be recorded in the button.
Rate: Pressing the Rate button will display a choice of time rate units for the rate denominator.
Rate Setpoint: Pressing the Rate Setpoint button will let the user enter the new Rate Setpoint

via multiple entry methods.
Units: Pressing the Auxiliary Units button will display the same set of units available for the pri-

mary units. Pressing any of these units will change the auxiliary units to that chosen unit.

Beamex® POC8 Automatic Pressure Controller

24 Local Operation and Setup

Zero Button

If the Zero Calibration function has been chosen in the Display Settings presented on page 35,
then the Zero Cal Button [ ] will appear in the Home view. If the instrument is measuring absolute
pressure, and the Zero Cal Button is pressed, a keyboard will appear to allow a single point calibra­tion. If the instrument is measuring gauge pressure, pressing the button will set the current reading to
zero. If the instrument is in emulation mode (absolute or gauge) then the value will not be saved to the
sensor but only as a temporary adjustment while in emulation mode. After exiting the emulation mode
or after a power cycle, the temporary adjustment will be cleared. The zero adjustment not in emulation
mode will be saved to the sensor as if single point calibration had been performed.

The pictures below show the instrument with zero cal function enabled. The picture on the left
shows instrument in gauge mode. The picture on the right shows the same instrument, but the
zero button on the absolute mode has been pressed, showing the keypad enabled to accept a
new single point calibration value.

Gauge pressure, zeroing. Absolute pressure, zeroing.

The background color of the zero button will momentarily change to a lighter color as the zero
calibration is performed then will revert back to a darker color when complete.

Tare Button

If the Tare calibration function has been chosen in the Display Settings presented on page 35,
then the Tare Button [ ] will appear in the channel screen. The Tare button and the Zero Button
cannot appear on the screen at the same time, in the same channel. When the Tare button is
pressed, the instrument will subtract the current pressure reading (the tare pressure) so that the indi­cator will display zero. Subsequent deviations in pressure will be relative to the tare pressure.

Tare button.

Pressing the tare button again will deactivate the tare and change the pressure indication back
to the reading corresponding to the calibrated output of the measurement module. An active
tare will revert to a deactivated state after a power cycle.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 25

When switching from Control mode to Measure mode, the system will not
be vented and the last applied pressure will be locked in the system by
means of a solenoid valve.

Venting will cause a loss of pressure at the vent rate in the system and the
plumbing connected to the measure control port. Care must be taken that
the device under test is not damaged during venting.

Operating Mode Selection

The operating modes are permanently displayed on bottom of the Home view. There are three
operating modes: Measure, Control and Vent. After the system has switched on, the instrument
will automatically be placed in Vent mode. The user can switch from one mode to the other by
using the mode selection keys.

Measure Mode: In Measure mode the device acts like a precision pressure measuring instru­ment and measures the pressure applied at the Measure/Control port. If the Control mode was
the last used mode before switching into Measure mode, the last controlled pressure is held in
the test assembly.

Control Mode: In Control mode the device provides a controlled pressure at the Measure/Con­trol port equal to the setpoint value. It is activated by pressing the Control button. In order to en­sure smooth operation in the control mode, following measures must be taken and respective
parameters must be set.

 In order to control pressures close to or below atmospheric pressure, a vacuum pump

should be connected to the Exhaust port.

 The control speed can be set in the Control Settings view [ ]. The Control rate can be

set between 0.001% of range/sec to 20% of range/sec.

 Control limits can be set in the Control Settings view [ ].

Vent Mode: The Vent function will vent the system to the atmosphere, including the test assem­bly connected to the Measure/ Control port. The Vent mode can be activated from the Measure
or Control mode by pressing the Vent button. The vent rate can be set in the Control Settings
view [ ]. The vent rate can be set between 0.001% of range/sec to 20% of range/sec.

Beamex® POC8 Automatic Pressure Controller

26 Local Operation and Setup

Settings View

The Settings view [ ] is used to set up general settings for the display. Settings parameters
include Language, Brightness, Volume, User 1 base units, User 1 multiplier, User 2 base units,
User 2 multiplier, Barometer units, and Configuration. The picture below shows these parame­ters as indicated when the Settings view has been chosen. As each parameter is pressed, an
input screen will appear on the right where selections can be made.

The Settings view provides a place to change the language, display brightness, volume, user
units, and barometer units. Configuration settings of the unit can also be saved in this view plus
the default configuration can be activated.

Settings view.

Language

The Language setting provides a selection of different languages. Once a language is chosen
all words within all menus will appear in the chosen language and the radix character (decimal
mark) will change from a dot (.) to a comma (,) depending on the language chosen. More lan­guages can be accessed by navigating to the next page of the language selection menu on the
right side of the screen.

Languages.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 27

Brightness

The Brightness setting provides a sliding scale to increment the screen brightness in all
screens. Sliding your finger along the bar graph or touching anywhere in the bar graph will
change the brightness of the screen. After the setting is made and your finger is removed from
the screen the menu will show the brightness percent selected.

Brightness.

Volume

The Volume setting provides a way to turn on or off the touch screen audio feedback.

Volume.

Beamex® POC8 Automatic Pressure Controller

28 Local Operation and Setup

User base units / Base units multiplier

When choosing a unit of measure from the Home view (main screen), standard units can be
chosen in addition to two user defined units. User units 1 and 2 are defined in the Settings View

using “User 1 base units”, “User 1 multiplier” and / or “User 2 base units”, “User 2 multiplier”. For

example, if the display of one atmosphere (atm) was needed, then psi could be chosen as the

“User 1 base unit” and the “User 1 multiplier”, in this case, would be 0.068045. When set this

way and the user 1 unit has been chosen, the user 1 unit will now display the pressure in atm.

User base units / Base units multiplier.

Barometer Units

When the Barometer Units Parameter has been chosen, a list of Imperial or Metric units is pre­sented on the right side of the screen. Any of these units can be chosen from this list for the
barometric readout that can be seen on the bottom right of the Home view.

Barometer units.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 29

Configuration

Configuration is the last parameter in the Settings view. It allows the operator to save instrument
settings and load them, as needed, in the future. Parameters that are set in the Settings view,
the Frames view, the Transducer view, and the Remote view can be saved using the Configura-

tion “Save” button and recalled using the Configuration “Load” button. Simply set all desired pa-

rameters then go to Settings-Configuration, press one of the numbered Configuration buttons

then press the “Save” button. This will save the current configuration in that button. To reload a

saved configuration at a later time, go to Settings-Configuration and press the numbered config­uration button corresponding to the saved configuration and then press the “Load” button.

Configuration.

The instrument default configuration can be activated simply by pressing the “Default” Button.

Beamex® POC8 Automatic Pressure Controller

30 Local Operation and Setup

Control Settings

The Control Settings view [ ] allows the user to select and configure the control parameters
for the solenoid valve controller in the instrument. This display remains the same for either one
or two pressure modules. The Control Settings screen is divided into two pages and can be
navigated using the Next Page [ ] and Previous Page [ ] buttons. The Control Settings
view provides two preset control modes “Precision” and “High Speed” which affect the “Control

Behavior”, “Rate Setpoint”, “Stable Limits” and “Stable Delay”. The Precision control mode is set

as default and provides a stable control rate at medium overshoots. The High Speed control
mode provides faster control rate at a higher overshoot. Each of the control parameters can be

changed by the user to best suit their application in the “Custom” control mode. The “Custom”

control mode retains the values of the parameters entered by the user until the user changes it
again. The first two pictures below show the Control Settings view. The lowermost picture
shows the first page of the Control Settings view in “High-Speed” control modes.

Control Settings. Control Settings.

High Speed control mode.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 31

Control Behavior

The Control Behavior button in the Control Settings view provides a choice between different

levels of control behavior ranging from “0” to “100” where “0” represents lowest overshoot con-

trol mode and “100” represents High Speed control mode. The Control Behavior is preset to
“50” for Precision control mode and to “100” for High Speed control mode. The Control Behavior

can be changed using the sliding scale. This will change the control mode to “Custom”. The pic-
ture level shows the sliding bar to adjust control behavior.

Control Limit Setting.

Rate Setpoint

The Rate Setpoint button allows the user to set the rate of pressure change when the device is
controlling up or down to a setpoint (picture below). The rate is limited to 0.001% of span of ac­tive range of the measurement module/second to 20% of the full scale range/second.

Rate Setpoint.

Beamex® POC8 Automatic Pressure Controller

32 Local Operation and Setup

Stability Parameters

Stability parameters for the controlled pressure can be found in the Control Settings view and
can be configured using the Stable Window and Stable Delay buttons. When the controller en­ters a stable condition the pressure indication color on the Home view will change from white to
green. The Stable Window button allows the user to enter a value as a percentage of the high­est range pressure module. This value represents the pressure window within which any set­point value would be considered stable by the user. The Stable Delay button lets the user add a
desired delay until the pressure value is considered stable while being in the stable window.

Stability parameters highlighted.

Control Volume

The Control Volume button in the Control Settings view allows the user to control pressure vol­ume in “cc”. The device is capable of automatically identifying the control pressure volume and
adjusting the control parameters based on it. By default this button is set on “Auto”. The picture
below displays the control volume setting for the instrument.

Control Volume.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 33

Control Limits

The Maximum and Minimum Limit buttons can be accessed by clicking the Next Page [ ]
button in the Control Settings view. These buttons provide a place to limit the setpoint value that
can be chosen in the Home view. These limits can only be set within the range of the active
pressure module. When the instrument is in Autorange the limits can only be set within the
range of the primary pressure module which, by convention, will have the widest range. The min­imum limit must be lower than the maximum limit. The user can not enter setpoints and thereby
not control to pressures outside of these limits.

Control limits.

Vent Rate

The Vent Rate button in the Control Settings view lets the user to determine the rate at which
pressure will vent in vent mode. By default the rate of the vent is set similar to the control rate.
The rate is limited to a maximum of 20% of the full scale range/ second. The picture below dis­plays the vent rate setting for the instrument.

Vent rate.

Beamex® POC8 Automatic Pressure Controller

34 Local Operation and Setup

Rate Parameters

Rate parameters for the control rate can be found in the Control Settings view and can be con­figured using the Rate Stable Window and Rate Stable Delay buttons. The Rate Stable Window
button allows the user to enter a value as a percentage of the active range of pressure module.
This value represents the pressure window within which the control rate value would be consid­ered stable by the user. The Rate Stable Delay button lets the user add a desired delay until the
control rate is considered stable while being in the rate stable window.

Rate parameters highlighted.

Detection Flags

POC8 is equipped with three detection flags that can be enabled or disabled by the user as
needed. These detection flags appear in the Control Settings view. The primary purpose of
these detection flags is to protect the device and to ensure desired operation. Each of these

flags can be turned “On” or “Off” as per user’s need. The picture below shows the detection flag

settings.
Supply Detection: If turned “On”, this flag allows the user to check for sufficient supply pres-

sure at the Supply Port of the instrument. In case the supply pressure is less than over 10% of
the control setpoint, an error is reported which can be seen in the Troubleshoot view by clicking
the error symbol [ ].

Burst Detection: If turned “On”, this flag allows the user to protect the instrument against sudden
bursts in the pressure at the Measure/ Control Port. In case a burst is detected, an error is re­ported which can be seen in the Troubleshoot view. This flag is turned “Off” by default.

Measure Regulation: If turned “On”, this flag allows pressure to be controlled while the instru-
ment is in “Measure” mode to prevent pressure leaks in the system over time. This will turn on

the internal pressure controller periodically to control pressure in a certain range of the meas­ured pressure value. This flag is turned “Off” by default.

Detection Flags highlighted.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 35

Display Settings

The Display Settings view [ ] allows the user to configure display properties like the filter for
the reading to reduce fluctuations due to electrical noise, and to set the resolution of the read­ing. In addition, the bar graph display and calibration function can be specified here.

Display Settings.

Reading Filter

The Filter is an electronic filter to smooth out the pressure readings. Because of differences in
resolution, greater filtering may display a more stable reading for some pressure units. Turn off
the Filter by selecting “Off”, select varying degrees of filtering for the current units by selecting
“Low”, “Normal” or “High”.

Reading Filter.

Beamex® POC8 Automatic Pressure Controller

36 Local Operation and Setup

Reading resolution

The Resolution of the displayed pressure value for each Channel can be set in the Display Set­tings view using the resolution Parameter. The resolution can be set to 4, 5 or 6 digits.

Reading Resolution.

Cal Functions

The Cal Function presents a choice of None, Tare or Zero. Choosing Zero will enable the Zero
Cal Button [ ] in the Home view. Choosing Tare will enable the Tare Button [ ] in the
Home view. The Tare button and the Zero Button cannot appear on the screen at the same
time. See chapters Zero Button on page 24 and Tare Button on page 24 for operation of the
Zero and Tare buttons in the Home view (main screen).

Cal Function.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 37

Programs

The Programs view [ ] is used to create, view and edit programs that are used to automati­cally run a sequence of commands within the device. The Programs view screen displays the
contents of the first written program in read only mode by default (leftmost picture below). User
can load, edit and delete other saved programs by clicking on the title of the current program
and then selecting the desired program sequence from the sidebar (rightmost picture below).

Programs view. Load, edit or delete programs.

Edit Programs

By default the programs are available in read only mode to prevent accidental changes to exist­ing programs. The users can edit existing programs or create steps in new ones by clicking on
Edit Program [ ] button (leftmost picture below). This makes the program editable and also
activates the Insert [ ] and Delete [

] buttons which are otherwise just labels and can’t
be clicked by the user. A series of predefined commands can be chosen to write the steps of a
program. Selection of commands and data in each sequential line will create a draft of resulting
command sequence in the selected program (rightmost picture below). Upon exiting the edit
mode by pressing the Edit Program [ ] button, the system will ask “Save changed pro-
grams?” Pressing the [ ] button will accept the changes, pressing the [ ] will revert back
to the old program. A list of available commands, data values and their functions are listed in the
table on next page.

Editable programs view. New line creation.

Beamex® POC8 Automatic Pressure Controller

38 Local Operation and Setup

Command

Function (data selection)

UNIT

Sets the pressure unit for operation

DELAY

Delays for time = 1 to 3600 seconds (Numerical Entry

MODE

Sets the control mode (Measure, Control or Vent)

PTYPE

Sets the pressure type (Gauge or Absolute)

RSETPT

Sets the rate setpoint in current units (Numerical Entry)

RUNITS

Sets the rate denominator time unit (min or sec)

SENSOR

Sets the active measurement module (1, 2 or 3)

SEQSTART

Starts the sequence from the beginning (None)

SETPOINT

Sets the control setpoint for the instrument (Numerical Entry)

SETPOINT%

Sets the control setpoint in % of current range (Numerical Entry)

WAIT

Waits for a manual input or stable condition (Stable or Input)

Table – Sequence Commands

Favorites View

The Favorites view is used to select programs that will appear in the Home view when the Favor­ites [ ] is pressed. The purpose of the Favorites view is to provide quick access to frequently
used programs. The current list of favorites is shown in leftmost picture below. The desired pro­gram can be selected by clicking on its name which takes the user to the Programs view where
the program can run be by clicking on the Play [ ] button. A maximum of eight programs can
be stored as favorites.

Favorites view. Play button highlighted.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 39

Information View

The Information view [ ] displays information about the device, including:

 Beamex address, and email
 Model number, serial number and operating software version.
 Control unit, serial number and software version.
 Pressure measurement module(s), range, serial number, and software version.

Information view.

Beamex® POC8 Automatic Pressure Controller

40 Local Operation and Setup

Troubleshooting View

The Troubleshoot view [ ] can be found by navigating to the second page of buttons on the
left. It is done by clicking on the Next Page [ ] button. The Troubleshoot view will display in­formation about error conditions and remote communications. Within the troubleshoot screen
(leftmost picture below), push the Error button to display any errors that have occurred in the in­strument due to a communication or network error. Push the Remote Settings button (rightmost
picture below) to show commands and responses that have been sent over the remote commu­nication connection. If there are any errors in the error queue an error symbol [ ] will appear
in all screens (lowermost picture below). Pressing this error button from any screen will open the
Troubleshoot view where the error can be viewed.

Troubleshoot error view. Troubleshoot remote view.

Error indication.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 41

Remote Settings View

With the Remote Settings view [ ] user can select the remote command set for all interfaces.
The GPIB address (IEEE-488), and Serial parameters (Serial RS-232 or USB) can be set on the
first page and Ethernet network parameters on the second. Details about the Remote Operation
(command sets, cable requirements, etc.) can be found in chapter Remote Operation on page

49.

Remote Settings view, page 1. Remote Settings view, page 2.

Remote Command Set

The remote command set parameter provides a choice of the Beamex, SCPI or DPI5xx com­mand set. The Beamex commands are listed in chapter Remote Operation on page 49.

Remote Command Sets.

Beamex® POC8 Automatic Pressure Controller

42 Local Operation and Setup

Setting the Ethernet DHCP to yes will have a short delay while the DHCP
server is contacted. If a DHCP server is not found, an error will be indicated.
If DHCP is enabled, the IP address, Netmask and Gateway are greyed out
and locked, these are controlled by the DHCP server.

Remote Communication Settings

The remainder of the Parameters in the Remote view present the choice of a numeric entry, a
numeric address entry, or a radio button selection. The parameters that require a numeric entry
will present a numeric keypad with min and max limits for the variable. The parameters that re­quire a numeric address (for example an IP address) will also present a keypad. Address en­tries should conform to the format of the parameter selected. The three screens below show ex­amples of each type.

GPIB Address, numeric entry field highlighted.

IP Address. DHCP Setting.

A successful communication link between the instrument and the various interfaces is indicated
by a Remote Settings Icon [ ] at the top of the screen.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 43

Step Settings View

The Step Settings view [ ] allows the user to enter control setpoint value or write program se­quences as a factor of the percentage of the device under test operating pressure range or as
fixed pressure values (uppermost picture below). The user can enter the minimum and maximum
range of the device under test (two middlemost pictures) and then select the desired percentage
value(s) or desired fixed pressure value(s) for setpoint(s). These ranges should be within the
maximum range of the primary pressure measurement module. The user can also enter the con­trol point up to a maximum of 5% over the range of the device under test limits by entering the
overrange percentage (lowermost picture below). POC8 automatically calculates the pressure
value of the setpoint based on this selection. The user can be directed to this view from the set­point entry menu in chapter Home View on page 18.

Step settings view.

Range selection, minimum and maximum.

Overrange Selection.

Beamex® POC8 Automatic Pressure Controller

44 Local Operation and Setup

Preset Steps

The user can have up to 12 different points along the range of the device under test (DUT). The
Preset Steps button allows the user to enter the number of points and then automatically divides
the range in equivalent percentages. For example if the user needs 6 distinct points along the
DUT range then enter 6 in the numeric keypad and press Enter [ ] button. POC8 will create
setpoints at 0%, 20%, 40%, 60%, 80% and 100% of the DUT range. The user also has the op­tion of changing these percentage values by clicking on the individual Percentage button on the
Step Settings view. The user can enter any percentage between 0 and 100. The desired value
can then be chosen by checking the box [ ] beside the Percentage button.

Preset Steps Entry.

Percentage Value Entry.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 45

Leak Test

Leak Test [ ] is a device under test specific feature (uppermost picture below). The user se­lects the pressure module first or sets the device to “Autorange” and then defines a leak by set-
ting the Setpoint, the time parameters and the Delta parameter (two lowermost pictures). With
the system pressurized to a predetermined amount, the leak test is initiated by pressing the Start
button. The device drives the pressure to the entered Setpoint and then switches to “Measure”
mode. At this time the leak test is initiated. If the change in pressure exceeds the Delta parame­ter before the allotted time in the Time parameter, then the Leak Test will return a red status in­dication showing the actual difference (delta) in pressure recorded during time period set in the
leak test, indicating a “failed” test. Otherwise it will return a green status indication showing that
the delta was not exceeded for the time period, indicating a “passed” test.

Leak Test.

Setpoint entry. Delta entry.

Beamex® POC8 Automatic Pressure Controller

46 Local Operation and Setup

Burst Test

Burst Test [ ] is a device under test specific feature (uppermost picture below). The user se­lects the measurement module first or sets the device to “Autorange” and then programs a pres-
sure burst by entering the low point and high point of pressure. For the device under test to pass
the burst test, it must burst at a pressure greater than Low Point and less than the High Point.
The user then enters a fast rate which is the control rate to reach the low pressure point and
then enters the slow rate which is the control rate between the low and high pressure point. The
burst test is initiated by pressing the Start button. The status of the test is shown next to the
pressure reading (lowermost picture).

Burst test screen.

Burst test - status.

Beamex® POC8 Automatic Pressure Controller

Local Operation and Setup 47

The default Password is 123456. After entering this for the first time, the
password can be changed.

Service View

The Service View [ ] can be found by navigating to the third page by clicking the Next Page [

] button at the bottom right corner of the button section of the screen. It is a password pro­tected area where calibration of all connected modules can be accomplished. In addition, this is
where the password for entering this area can be changed.

Service view (locked).

Press the Enter button to show the numeric keypad to enter a password. This will unlock other
functions. Default password is 123456. Enter 123456 and press the check mark [ ] to unlock
the Service view.

Service view. Entering a password.

Beamex® POC8 Automatic Pressure Controller

48 Local Operation and Setup

Please make note of a password change and save the new password in a
secure location.

Note: Recommended calibration setup and explanation of calibration screen
is covered in chapter Calibration on page 74 of this manual.

Unlocked Service View

After the Password has been entered, the unlocked Service view will appear (see picture below).
To re-lock this screen, press the lock button.

Unlocked Service.

From the Unlocked Service view, the Password can be changed by pressing the Enter button
next to the Change Password label. This will open a keypad where a new password can be en­tered and accepted by pressing the Check Mark [ ].

The Unlocked Service view is the access point to all calibration screens described in Section 10
of this manual.

Beamex® POC8 Automatic Pressure Controller

Remote Operation 49

Remote Operation

Use the screens in Section Remote view to set the operating parameters for the instrument
command set, Ethernet, Serial (RS-232) and IEEE-488 (GPIB) information.

Command Set

Command Set button – Users can select which model remote protocol they would like to emu­late for simulation and testing purposes. Selections may include the following:

Beamex (default)
SCPI
DPI5xx

Operation with Beamex calibrators

Connect the POC8 to the calibrator as shown below:

Beamex® POC8 Automatic Pressure Controller

50 Remote Operation

Command or Query

Response / Function

*IDN?

Returns identification string

*RST

Reset to known state (default+psi)

*TST?

Returns 1

*OPC

Operation completed

*WAI

Returns operation completed state

*CLS

Clear status and error queue

*ESE

Enable status event

*ESE?

Returns enable status even value

*ESR

Event status register

*ESR?

Returns even status register value

*SRE

Service request enable

*SRE?

Returns service request enable value

*STB?

Returns status byte

IEEE-488

IEEE-488 address button – Allows the user to set the GPIB address by inputting a numeric
value utilizing the touch screen.

IEEE-488.2 Commands

Beamex® POC8 Automatic Pressure Controller

Remote Operation 51

Please contact your network administrator for proper settings.

Please consult your computer resources department prior to connecting
this instrument to your network to verify there are no conflicts with existing
IP addresses.

Ethernet

The Ethernet function allows the user to set the following by inputting a numeric value in each
separate field:

 IP
 Netmask
 Gateway
 Port
 DHCP settings

Set the Ethernet communication parameters as described in chapter Remote Operation on
page 49.

The Ethernet communication port allows the POC8 to communicate with computers using
10/100Based-T specifications.

Before using Ethernet communication, four parameters must be set up: IP, Netmask, Gateway,
and Port.

USB device (Virtual Serial Port)

The USB virtual serial communication port allows the POC8 to communicate with USB hosts,
while retaining the semantics of legacy serial ports for application level. Settings are fixes as:

57600 baud, 8 data bits, 1 stop bit, no parity.

Most modern operating systems have drivers for the used USB serial port converter.

Beamex® POC8 Automatic Pressure Controller

52 Remote Operation

Serial

Set the Serial communication parameters as shown in chapter Remote Operation on page 49.
The serial communication port allows the POC8 to communicate in RS-232 format with comput­ers, terminals, PDAs, or similar hosts.

These parameters should be set to match your host computer. Default settings are: 9600 baud,
8 data bits, 1 stop bit, no parity, and no echo.

If echo is ON, the POC8 will immediately echo back characters sent over the serial port. The
Serial function allows the user to set the RS-232 serial port settings by selecting from the
choices provided:

Baud:

 9600
 19200
 38400
 57600
 115200

Data Bits:

 7
 8

Stop Bits:

 1
 2

Parity:

 Even
 Odd
 None

Echo settings:

 On
 Off

Serial Cable Requirements

RS-232 communications are transmitted over a three conductor, shielded cable terminated in a
standard DB9 connector on the instrument end, and a different gender connector on the host
end. The proper pin-outs are shown in the following illustration.

Beamex® POC8 Automatic Pressure Controller

Remote Operation 53

Command and Query Format

Commands must be sent in ASCII format and terminated with either a carriage return (<cr>),
linefeed (<lf>), or both. Commands are not case sensitive. Each query returns a response. If an
error is detected the response will include an error flag.

Command or Query field: Unless otherwise specified, commands are typically converted to que­ries by appending a question mark to the command. A table in chapter Beamex default com-
mand set on page 55 lists all of the POC8 command or query keywords.

Data field: The data field is either in ASCII {string} or numeric {value} form. In the case of multi­ple data fields, commas are required to separate the fields. Queries do not have a data field.
String (text) or value (numeric) data are acceptable in any of the following formats:

Examples of {string} data: ON, OFF, mBar, inHg
Examples of {value} data: 1, 1.0, -5.678, 25.68324e-5

Command Set Definitions

In this manual, a data entry made up of alpha characters is defined as a string, as opposed to
data containing only numbers, such as “Enter 1 for ON or 0 for OFF” where 1 and 0 are defined
as values.

Command: Any command or query listed in a table in chapter Beamex default command set
on page 55 . For commands that take boolean data the following strings are acceptable:

0 1
False True
No Yes
Off On

Separator: Space (SP).
Data: ASCII representations of numbers, {value}, or alpha characters, {string}, data as defined

above. When sending code a literal variable replaces the brackets and the enclosed charac­ter(s) shown in the following examples.

Termination: Linefeed (LF) or carriage return (CR) is used to signal the end of a command
statement. For IEEE-488.2 operation “EOI” is an acceptable alternative.

Always send commands in one of the following formats:

[Command] [Termination];
[Command] [Separator] [Data] [Termination];

Queries are special instructions in the form:

[Command?] [Termination]

where the question mark, “?”, immediately precedes the terminator.
When a valid query is received, the POC8 will return {data} terminated by CR and LF. Floating

point data is returned in the current engineering units in exponential format.

Beamex® POC8 Automatic Pressure Controller

54 Remote Operation

Output Formats

Pressure readings are returned in exponential notation in a format according to the OUTFORM
command as follows:

<sp> pressure value <cr><lf>
<sp> pressure, units number,STANDBY <cr><lf>
<sp> pressure, pressure rate <cr><lf>
<sp> pressure, minimum peak, maximum peak <cr><lf>
<sp> pressure, active sensor (P or S) active turndown (1-4)<cr><lf>

<sp> pressure, control point, “stable” or “slewing”<cr><lf>
<sp> pressure, “no barometer” or baro reading<cr><lf>

Beamex® POC8 Automatic Pressure Controller

Remote Operation 55

Command or Query

Data

Response/Function

?

See Table Below

Returns data per the current output for­mat

Acquire?

15 char string. Ex:

This command is used when multiple
computers would like to control the in­strument.

Address

Acquire? Test_stand_1

Sets the GPIB Address

Address?

Returns the GPIB Address

Asset_tag

Returns:

General purpose string for customer
use

Asset_tag?

<sp>(YES or NO), CCC…
CCC<cr><lf>

Return customer asset tag string

Autorange

0-31

Sets whether the autorange function is
enabled or disabled

Autorange?

<sp>nn<cr><lf>

Returns whether the autorange function
is enabled or disabled.

Autozero

none

Re-zero all the ranges. These adjust­ments are not password protected and
are saved through power cycles. This
command takes approximately 60 sec­onds but may take longer depending on
the time to become stable.

Autozero?

S,T,X,X

Returns autozero data where S repre­sents state (0 = complete, 1 = local au­tozero, 2 = remote autozero), T repre­sents the estimated time to complete in
seconds, and x is a (0) character since
this data location is not used at this
time.

Autozeroabort

none

Aborts autozero. Any sensors that have
been zeroed will not revert to previous
zero offsets.

Baro?

<sp>+n.nnnnnE+nn<cr><lf>

Returns reading from barometric mod-

ule or “NO BAROMETER” if one isn’t

installed

Calculate_as_found_
line arity

Calculate linearity slopes and intercepts
from true/actual pressures

Caldisable

YES,NO

Sets whether or not calibration of the
active module is disabled.

Caldisable?

<sp>(YES or NO)<cr><lf>

Returns whether or not calibration of
the active module is disabled.

Calspan

Current Pressure

Sets the internal span multiplier to
achieve the sent pressure. Sending a
“?” clears internal span

Commands and Queries

Beamex default command set

Beamex® POC8 Automatic Pressure Controller

56 Remote Operation

Calspan?

<sp>+n.nnnnnE+nn<cr><lf>

Returns the span multiplier stored in the
active turndown

CalZero

Nnnnnnn

Sets the internal zero to achieve the

sent pressure. Sending a “?” clears the

internal zero.

CalZero?

<sp>+n.nnnnnE+nn<cr><lf>

Returns the zero offset in psi stored in
the active turndown

Cerr

None

Clears the error queue

Chanfunc

Press, peak, rate, rate setpt,
dio, units

Sets the secondary display function
mode, works identical to Chanfunc2

Chanfunc?

<sp>CCCCC…<cr><.lf>

Returns the secondary alternate func­tion mode, works identical to
Chanfunc2

Chanfunc2

Press, peak, rate, rate setpt,
dio, units

Sets the secondary display function
mode

Chanfunc2?

<sp>CCCCC…<cr><.lf>

Returns the secondary alternate func­tion mode

Chanfunc3

Press, peak, rate, rate setpt,
dio, units

Sets the tertiary display function mode

Chanfunc3?

<sp>CCCCC…<cr><.lf>

Returns the tertiary alternate function
mode

CID?

Returns the ID string of the controller

Cmdset

Mensor, DPI510, SCPI

Activates remote command set for in­strument emulation modes.

Cmdset?

<sp><CCCCCC><cr><lf>

Returns active command set identifier

Control

Instrument placed in Control Mode

Control?

<sp>(YES or NO)<cr><lf>

Returns YES if instrument is in control.
NO if otherwise

Crate

Slow, Medium, Fast, Varia­ble

Sets the control rate, Variable mode is a
predetermined user defined rate setpt.

Crate?

<sp>CCCCCC<cr><lf>

Returns the control rate – CCCC is vari­able in length and corresponds to the
parameters for the CRATE command

Ctype?

Returns the type of controller

Decpt?

<sp>n<cr><lf>

Returns the number of decimal points
(see Resolution)

Default

None

Sets the default values

DHCP

ON or OFF

Reserved for DHCP setup

DHCP?

<sp>(YES or NO)<cr><lf>

Reserved for DHCP setup

DOC?

<sp>mm/dd/yyyy<cr><lf>

Returns the date of cal for the active
pressure module.

DOM?

<sp>mm/dd/yyyy<cr><lf>

Returns the date of manufacture

Error?

<sp> text description
<cr><lf>

Returns the next error in the error
queue

Beamex® POC8 Automatic Pressure Controller

Remote Operation 57

DOC

mm/dd/yyyy

Sets the date of cal for the active pres­sure module.

Filter

OFF, LOW, NORMAL, HIGH

Sets the reading filter 0, 80%, 92%,
95%

Filter?

<sp> (filter)<cr><lf>

Returns the reading filter.

Gasdensity

Value in lb/cuft, or
“NITROGEN” or “DRYAIR”

Sets the head pressure gas density in
lb/cuft

Gasdensity?

<sp>+n.nnnnnE+nn<cr>

Returns the serial data bits number

Gastemp

Value in degrees F

Sets the head pressure gas tempera­ture

Gastemp?

<sp>+n.nnnnnE+nn<cr><lf>

Gets the head pressure gas tempera­ture

Gateway

nnn.nnn.nnn.nnn

Sets the Ethernet gateway address

Gateway?

<sp>nnn.nnn.nnn.nnn<cr><l
f>

Gets the Ethernet gateway address
Height

Value in inches

Sets the head pressure height in inches

Height?

<sp>+n.nnnnnE+nn<cr><lf>

Gets the head pressure height in inches

Id?

<sp>BEAMEX,POC8,
ssssss,v.v.vv<cr><lf>

Ssssss is the serial number,v.v.vv is the
POC8 software version.

IP

nnn.nnn.nnn.nnn

Sets the IP address of the instrument

IP?

<sp>nnn.nnn.nnn.nnn<cr><l
f>

Returns the IP address of the instru­ment

Keylock

YES or NO

Locks or unlocks the entire touch
screen

Keylock?

<sp>(YES or NO)<cr><lf>

Returns Yes or No

Linearity_pts

n

n = number of linearity points (11 max)

Linearity_pts?

<sp>n<cr><lf>

Returns the number of linearity points

Linearity_seg<sp>[n]

n,f

n = linearity point, f = linearity segment
value

Linearity_seg?<sp>[n]

<sp><f><cr><lf>

Returns the segment value for the point

Linearity_slp<sp>[n]

n,f

n = linearity point, f = linearity slope
value

Linearity_slp?<sp>[n]

<sp><f><cr><lf>

Returns the segment slope for the point

Linearity_int<sp>[n]

n,f

n = linearity point, f = linearity intercept
value

Linearity_int?<sp>[n]

<sp><f><cr><lf>

Returns the segment intercept for the
point

List?

<sp>Pri,1;Sec,1;Ter,1;Bar,1
<cr><lf>

Returns list of available pressure mod­ules and turn downs. Turn downs are
obsolete and therefore set to 1 for
backwards compatibility.

Listcal?

<sp>PRI,{sn},1,{mmddyy};S
EC,{sn},1,{mmddyy},TER,{s
n},1,{mmddyy}, Bar,{sn},{
mmddyy}<cr><lf>

Beamex® POC8 Automatic Pressure Controller

58 Remote Operation

Listrange?

<sp>PRI,1,min,max;SEC,1,
min,max;TER,1,min,max;Ba
r,min,max

Returns the ranges of the installed
measure modules.

Locale

ll_CC

Sets the locale, posix locale names
en_US = English,U.S.A.

de_DE = German, Germany etc

Locale?

<sp>ll_CC<cr><lf>

Returns the posix locale of the instru­ment

Localgravity

Value in ft/s^2

Sets the local gravity in feet/sec^2

Localgravity?

<sp>+n.nnnnnE+nn<cr><lf>

Returns the local gravity in feet/sec^2

LowerLimit

Value inside primary xducer
range in current units.

Sets the lower control limit for the in­strument

LowerLimit?

<sp>n.nnnnnE+nn<cr><lf>

Returns the lower control limit for the in­strument in current units.

Measure

None

Instrument placed in Measure Mode

Measure?

<sp>(YES or NO)<cr><lf>

Returns YES if instrument is in meas­ure. NO if otherwise

Mode

STANDBY, MEASURE,
CONTROL, VENT

Sets the operation mode
Mode?

<sp>XXXXXX<cr><lf>

Returns the operation mode

Netmask

nnn.nnn.nnn.nnn

Sets the Ethernet network mask

Netmask?

<sp>nnn.nnn.nnn.nnn<cr><l
f>

Gets the Ethernet network mask
Options?

<sp>o[,0[,0…]]<cr><lf>

Returns list of installed options

Outform

1 to 7 – see table below

Sets the output format

Outform?

<sp>X<cr><lf>

Returns the output format – see table
below

Peakmax?

<sp>n.nnnnnE+nn<cr><lf>

Returns the maximum pressure since
peakreset was sent.

Peakmin?

<sp>n.nnnnnE+nn<cr><lf>

Returns the minimum pressure since
peakreset was sent.

Peakreset

None

Resets the peak values.

Percent

Value in percent

Sets an exact measure filter percent

Percent?

<sp>n.nnnnnE+nn<cr><lf>

Returns the filter percent

Port

nnnnnn

Sets the Ethernet port of the instrument

Port?

<sp>nnnnn<cr><lf>

Returns the Ethernet port of the instru­ment

Precision

none

Sets the precision mode: .003% stable
window and 4 second stable delay

Ptype

Absolute or Gauge

Sets the instrument pressure type –
emulation only works if the optional bar­ometric module is installed

Ptype?

<sp>CCCCC<cr><lf>

Returns “Absolute” or “Gauge” for the
pressure type

Beamex® POC8 Automatic Pressure Controller

Remote Operation 59

RangeMax?

<sp>n.nnnnnE+nn<cr><lf>

Returns the maximum range of the ac­tive pressure module in the current
units.

RangeMin?

<sp>n.nnnnnE+nn<cr><lf>

Returns the minimum range of the ac­tive pressure module in the current
units.

Rate?

<sp>n.nnnnnE+nn<cr><lf>

Returns the rate reading of the instru­ment in current units/current time unit
(see: Runits)

Rdecpt?

<sp>n<cr><lf>

Returns the number of rate decimal
points. (see Resolution)

Reference

{EXTVAC or ATM}

Sets the reference type for vacuum
pump connected to the reference, or
vented to atmosphere. This option is
available only on native gauge units.

Reference?

<sp>{EXTVAC or
ATM}<cr><lf>

Returns the current reference type.
See: Reference

Release?

15 char string. Ex: Release?
Test_stand_1 Returns:

<sp>(YES or NO), CCC…
CCC<cr><lf>

This command is used to release con­trol of the instrument in a multiple com­puter environment.

Yes if release is successful
No if instrument is being controlled with

another computer

CCC… = name of controlling computer

or AVAILABLE
See: Acquire? and Unlock

Repeat

None

Repeats output continually over serial
port.

Resolution

<n>

Sets the number of significant digits.
See: decpt

Resolution?

<sp>n<cr><lf>

Returns the number of significant digits.
See: decpt

Rfilter

Value in %

Sets the % of the rate filter

Rfilter?

<sp>n.nnnnnE+nn<cr><lf>

Returns the rate filter.

Rsetpt

Value in current units

Sets the rate setpoint

Rsetpt?

<sp>n.nnnnnE+nn<cr><lf>

Returns the rate setpoint

Runits

Sec, min, hr

Sets the rate time unit

Runits?

<sp>XXXX<cr><lf>

Returns the rate time unit

Rfreq

Value in frequency

Sets rate Butterworth corner frequency

Rfreq?

<sp>n.nnnnnE+nn<cr><lf>

Returns rate Butterworth corner fre­quency

Rwindow

Value in current units

Sets rate exponential filter window

Rwindow?

<sp>n.nnnnnE+nn<cr><lf>

Returns rate exponential filter window

Save_cal

Save calibration values

Save_linearity

Save linearity values

Beamex® POC8 Automatic Pressure Controller

60 Remote Operation

Sbaud

9600, 19200, 38400, 57600,
115200

Sets the serial baud rate
Sbaud?

<sp>XXXX<cr><lf>

Returns the serial baud data

Sdata

7 or 8

Sets the serial data bits

Sdata?

<sp>n<cr><lf>

Returns the serial data bits number

Sensor

1,2 or PRIMARY,
SECONDARY

Sets the active measurement module

Sensor?

<sp>XXXXXXX,1<cr><lf>

Returns active measurement module in
long string format

Setpt

value inside upper and lower
limits

Sets the control setpoint for the instru­ment

Setpt?

<sp>XXXXXXX<cr><lf>

Returns the control setpoint in current
units.

Setpt%

Value in % of current range

Sets the control setpoint in % of current
range

Setptpct

Value in % of current range

Sets the control setpoint in % of current
range

Setptpct?

<sp>n.nnnnnE+nn<cr><lf>

Returns the current setpoint in % of cur­rent range

Span

desired pressure or ?

Sets span on active pressure module or
for ?, clears previous value, must be >
50% FS and has a 1% limit.
CALDISABLE must be OFF/NO.

Span?

<sp>XXXXXXX<cr><lf>

Returns span scale factor for active
pressure module

Sparity

Even, ODD, NONE

Sets the serial parity

Sparity?

<sp>CCCC<cr><lf>

Returns the serial parity

Srqmask

Stable,Error or both

Sets the POC8 to issue a service re­quest (SRQ) over the IEEE when the
pressure Control is stable, or an error
occurs. These are 80 hex and 40 hex
respectively

Srqmask?

<sp>{string}<cr><lf>

Returns “stable”, ”error” or “error, stable”
depending on the SRQ.

Sstop

1 or 2

Sets the serial stop bits

Sstop?

<sp>X<cr><lf>

Returns the serial stop bits

Stable?

Returns YES if instrument is stable or
No

Stabledelay

0 to 65535

Sets the stable time to the number of
seconds specified

Stabledelay?

<sp>XXXXXXX<cr><lf>

Returns the stable time.

stabletime

0 to 65535

Sets the stable time to the number of
seconds specified

Stabletime?

<sp>XXXXXXX<cr><lf>

Returns the stable time.

StableWin

%fs value

Sets the stable window as a %FS

StableWin?

<sp>n.nnnnnE+nn<cr><lf>

Returns the stable window.

Beamex® POC8 Automatic Pressure Controller

Remote Operation 61

Standby

None

Instrument placed in Standby Mode

Standby?

<sp>(YES or NO)<cr><lf>

Returns yes if instrument is in Standby,
no if otherwise

Step

Value inside upper and
lower limits and inside the
range of the active pressure
module.

Sets the control step size for the instru­ment

Step-

Jogs the setpoint down one step

Step+

Jogs the setpoint up one step

Step?

<sp>+n.nnnnnE+nn<cr><lf>

Returns the control step for the instru­ment

Step%

Value in % of current range

Sets the control step in % of current
range

Steppct

Value in % of current range

Sets the control step in % of current
range

Steppct?

<sp>n.nnnnnE+nn<cr><lf>

Returns the current step in % of current
range

Stop

None

Stop repeating output over serial port –
see repeat

Tare

ON / OFF

Tares the reading to zero

Tare?

<sp> n.nnnnnE+nn <cr><lf>

Returns value of Tare

Units

units code or text in table
below

Sets the instrument engineering units

Units?

<sp>CCCC<cr><lf>

Returns the instrument units in a text
string

Unlock

None

Releases Acquire locks

UpperLimit

Value inside primary xduc­erRange in current units.

Sets the Upper control limit for the ac­tive pressure module.

UpperLimit?

<sp>xxxxxxx<cr><lf>

Returns the upper control limit for the
active pressure module.

Vent

None

Instrument placed in Vent Mode

Vent?

<sp>(YES or NO)<cr><lf>

Returns yes if instrument is in Vent, no
if otherwise

Volume

Value in cc

sets the system volume in cc’s – only
applicable for the pump

Volume?

<sp>Xxxxxxx<cr><lf>

Returns the current system volume in
cc’s

Window

Value in current units

Sets the exponential filter window for
the active pressure module

Window?

<sp>n.nnnnnE+nn<cr><lf>

Returns the exponential filter window
for the active pressure module

Zero

desired pressure or ?

Sets zero to set pressure or for ?,
clears previous value. CALDISABLE
must be OFF/NO.

Zero?

<sp>n.nnnnnE+nn<cr><lf>

Returns zero offset for active pressure
module

Beamex® POC8 Automatic Pressure Controller

62 Remote Operation

n

Description

Output Format

Type

1

pounds per square inch

PSI

Imperial

2

inches of mercury @ 0°C

INHG

Imperial

3

inches of mercury @ 60°F

INHG

Imperial

4

inches of water @ 4°C

INH2C

Imperial

5

inches of water @ 20°C

INH2O

Imperial

6

inches of water @ 60°F

INH2O

Imperial

7

feet of water @ 4°C

FTH2O

Imperial

8

feet of water @ 20°C

FTH2O

Imperial

9

feet of water @ 60°F

FTH2O

Imperial

10

millitorr

MTORR

Metric

11

inches of sea water @ 0°C

INSW

Imperial

12

feet of sea water @ 0°C

FTSW

Imperial

13

atmospheres

ATM

Imperial

14

bars

BAR

Metric

15

millibars

MBAR

Metric

16

millimeters of water @ 4°C

MMH2O

Metric

17

centimeters of water @ 4°C

CMH2O

Metric

18

meters of water @ 4°C

MH2O

Metric

19

millimeters of mercury @ 0°C

MMHG

Metric

20

centimeters of mercury @ 0°C

CMHG

Metric

21

torr

TORR

Metric

22

kilopascals

KPA

Metric

23

pascals

PA

Metric

24

dynes per square

DY/CM2

Metric

25

grams per square centimeter

G/CM2

Metric

26

kilograms per square

KG/CM2

Metric

27

meters of sea water @ 0°C

MSW

Metric

28

ounce per square

OSI

Imperial

29

pounds per square foot

PSF

Imperial

30

tons per square

TSF

Imperial

32

micron of mercury @ 0°C

mHG

Metric

33

tons per square

TSI

Imperial

34

hectapascals

HPA

Metric

36

megapascals

MPA

Metric

37

millimeters of water @ 20°C

MMH2O

Metric

38

centimeters of water @ 20C

CMH2O

Metric

39

meters of water @ 20°C

MH2O

Metric

Units Command Syntax for Measurement Units

Beamex® POC8 Automatic Pressure Controller

Remote Operation 63

Code

Serial Poll Byte

Description

Error String Returned

E00

00h

No errors

NO ERRORS

E05

45h

Parameter error

EGPIB PARAMETER ERROR:
<String that was sent>

E07

47h

Syntax error

EGPIB SYNTAX ERROR:
<String that was sent>

Command

Response/Function

[:UPPer]?

Returns maximum range

:LOWer?

Returns minimum range

:UNIT

[:NAME]?

Returns ASCII units (mixed case)

:VALue?

Returns the units conversion factor

:REFerence

[:HEIGht] <n>

Sets the head pressure height

:HEIGht?

Returns the head pressure height

:MODE?

Returns “OFF”, “GAS”, or “LIQUID”

:MODE OFF | GAS |

Reload data from controller

LIQUID

Sets the head pressure mode

:MEDium<n>

Sets the medium density

:MEDium?

Returns medium

:ACTive <n>

Sets the active sensor

ACTive?

Returns the active sensor

SYSTem

:DATE <i,i,i>

Not used, kept for backwards compatibility

:DATE?

Not used, does not cause an error, does not return a re­sponse

:TIME <i,i,i>

Not used, kept for backwards compatibility

:TIME?

Not used, does not cause an error, dose not return a re­sponse

:ERRor[:NEXT]?

Returns error code, description

:KLOCk ON | OFF | 1 | 0

Sets the keylock state

Error Codes

SCPI Commands and Queries

Except for the engineering units selection, the numeric suffix selects the applicable chan­nel/sensor:
1= Channel A
2= Barometer (if installed)

This numeric suffix always defaults to 1 and is designated by [C] (channel)

Beamex® POC8 Automatic Pressure Controller

64 Remote Operation

:PRESet

Load known state values

:SAVe

No function (not needed)

:VERSion?

Returns SCPI version 1994.0

TEST

Returns “OK”

:ELECtronic?

Returns “OK”

:RELay<n>?

Returns status of digital output <n>

:RELay<n> ON | OFF

Turns the digital output on or off <n>

UNIT

:[PRESsure] bar | mbar | Pa | psi

Sets the pressure units

:[PRESsure]?

Returns the pressure units

:NAME<n>?

Returns the units string for units code <n>

:FACTor <n>?

Returns the units conversion for units code <n>

:INDEX <n>

Sets the index number.

:INDEX?

Returns the index number. index unit
0 bar

mbar
Pa
psi
atm
kp/cm2
lbf/ft2
kPa
cmH2O(4°C)
inH2O(4°C)

10 inH2O(60°F)
11 ftH2O(4°C)
12 µmHg(0°C)

mmHg(0°C)
cmHg(4°C)
inHg(0°C)
inHg(60°F)

17 - -

user
user
user

OUTPut

:STATe ON | OFF | 1 | 0

ON or 1 = Control OFF or 0 = Measure

:STATe?

Returns 0 for measure 1 for control

:MODE MEASure | CONTrol | VENT

Sets the mode indicated

:MODE?

Returns the mode string

:STABle?

Returns 1 if stable 0 if not

:AUTOvent ON | OFF | 1 | 0

Autovent is always true on POC8

:AUTOvent?

Returns the state of the Vent mode

:AUTORange ON | OFF | 1 | 0

Turns autorange on or off

Beamex® POC8 Automatic Pressure Controller

Remote Operation 65

:AUTORange?

Returns “ON” or “OFF”

[SOURce]

:PRESsure

[:LEVel] [:IMMediate]

[:AMPLitude]

<n>

Sets the setpoint

[:AMPLitude]?

Returns the setpoint

:SLEW <n>

Sets the rate setpoint

:SLEW?

Returns the rate setpoint

:TOLerance?

Returns the stable window

:TOLerance<n>

Sets the stable window

CALCulate

:LIMit

:LOWer<n>

Set the minimum control limit

:LOWer?

Set the minimum control limit

:UPPer<n>

Set the maximum control limit

:UPPer?

Set the maximum control limit

:SYSTem

:DETECT SLOW | FAST |

Sets the head pressure height in inches

CANCEL

Not used, kept for backwards compatibility

:DETECT?

Returns “0”

GPIB Capability Codes

All remote commands sent to the POC8 are shown in the Trouble Shooting view, under the “Re­mote” button. If there is a syntax error, an error message will appear below the errant command.
Local errors and remote command errors will appear under the “Error” button. Maximum of 100

errors are stored and can be retrieved.

GPIB Capability Codes

SH1 Full source handshake capability
AH1 Full acceptor handshake capability
T6 Talker with serial poll and unaddress if MLA
L4 Listener with unaddress if MTA
SR1 Full service request capability
L1 Full remote/local capability including LLO
PO No parallel poll capability
DC1 Full device clear capability
DT1 Full device trigger capability
C0 No controller capability
E2 Tri-state outputs

Beamex® POC8 Automatic Pressure Controller

66 Remote Operation

Interface Functions

POC8 responds to the following IEEE.488.2 interface functions:

SRQ Service Request: A service request is asserted whenever an error is encountered.

When the bus controller issues a serial poll the error will be cleared. If the host
IEEE board includes automatic serial polling capability, turn this feature off in order
to view all errors.

LLO Local Lockout: The front panel keyboard of the device may be locked by sending

LLO or the command KEYLOCK ON.

GET Group Execute Trigger: When this message is received, the device will save the

current readings until the next time it is addressed as a talker.

GTL Go To Local: A GTL message will cause the device to return to local operation and

unlock the keyboard.

DCL Device Clear: When this message is received, the device will clear all errors and

buffers and remain in the Remote mode.
SDC Selected Device Clear: The effect is the same as DCL.
EOI End or Identify: May be used as a command or query terminator in the place of, or

concurrent with, a terminating linefeed.

Beamex® POC8 Automatic Pressure Controller

Remote Operation 67

USB Software Upgrade

The instrument software can be upgraded to the most recent release by copying the instrument
software from the Beamex website onto a USB device. The user can then plug the USB device
to the USB port on the front panel of the instrument for an easy upgrade. The instrument recog­nizes this device by displaying a USB icon on the top bar of the screen (uppermost picture be­low). The user can navigate to the Software upgrade menu by clicking on the USB icon. The
software upgrade menu gives the user information on the current instrument software and the
version of instrument software on the USB device (lowermost picture below).

The user can load the instrument software from the USB to the instrument by clicking on the de­sired version and then clicking [ ] button. The status of the installation can be seen on right
one fourth of the screen.

The user also has the option to copy and load program test sequences from the USB drive
which can later be accessed through the Programs view menu.

Home View with USB Icon.

Software Upgrade Menu.

Beamex® POC8 Automatic Pressure Controller

68 Options

Options

 Barometric Module (for gauge and absolute emulation) (9891930)
 Additional Measurement Module

o 350 mbar / 5 psi (9891860)
o 1 bar / 14.5 psi (9891870)
o 6 bar / 87 psi (9891880)
o 20 bar / 290 psi (9891890)
o 100 bar / 1450 psi (9891900)
o 210 bar / 3045 psi (9891910)
o Special range, contact Beamex (9891920)

 Bench Mounting Kit (9891850)
 Pressure hose for output pressure

o T-hose set with connectors for low pressure (8009550)
o Extension hose (straight) for low pressure (8009560)
o T-hose set for high pressure (8170200)
o Hose set (straight) for high pressure (8003365)

 Vacuum pump

o Vacuum Pump 110 V (9427110)
o Vacuum Pump 230 V (9427230)
o Vacuum pump switch set for panel (9972405)
o Swivel stand for vacuum pump (9972410)

 Contamination Prevention Accessories

o DMT40 Dirt and Moisture Trap for max. 40 bar / 580 psi (9010900)
o DMT210 Dirt and Moisture Trap for max. 210 / 3050 psi pressure (9010910)

Beamex® POC8 Automatic Pressure Controller

Options 69

Barometric Module

The Barometric Module is an absolute pressure module used to accurately measure local at­mospheric pressure. This module is in a different housing compared to the regular modules. It is
removable by taking off the top cover of the chassis.

The POC8 uses the barometric pressure, measured by the barometric module, for pressure
mode emulation in the channels. If a barometric module is installed the Pressure Mode button in
the Home view (main screen) will become active and, when pressed, will toggle between Abso­lute and Gauge mode (see chapter Home View on page 18). The barometer reading can also
be read at the bottom of the buttons in the Home view.

Gauge Pressure Emulation

In the Home view (main screen) an absolute pressure module channel will indicate “Absolute” in
the mode button (this is the default mode). When this button is pressed the button label will tog­gle to “Gauge” and have a lighter background color. The lighter background color is an indica-
tion that the channel is in emulation mode.

In the gauge emulation mode the atmospheric pressure reading from the barometric reference
module is subtracted from the absolute pressure reading to emulate a gauge pressure.

Absolute Pressure Emulation

In the Home view (main screen) a gauge pressure module channel will indicate “Gauge” in the
mode button (this is the default mode). When this button is pressed the button label will toggle to
“Absolute” and have a lighter button background color. The lighter background color is an indica­tion that the channel is in emulation mode.

In the absolute emulation mode the atmospheric pressure reading from the barometric module
is added to the gauge pressure reading to emulate an absolute pressure.

Emulation Mode Accuracy

The accuracy in emulation mode is different for gauge and absolute emulation mode.
The barometric module has six significant digits and has a guaranteed drift of 0.0002827 mbar /

0.0000041 psi over a 24 hour period which has no significant effect on the emulated gauge
pressure uncertainty.

The absolute uncertainty of the barometric module must be considered in the emulated absolute
pressure uncertainty.

Calibration of the Barometric Module

The Barometric Module can be calibrated in exactly the same manner as the other installed
modules as described in section Calibration.

Specifications of the Barometric Module

Accuracy: 0.02% of reading. Uncertainties include all pressure effects, temperature effects over
the calibrated range and calibration stability for 365 days after re-zeroing.

Pressure Range: The standard Barometric Module is calibrated from 0.55 to 1.17 bara / 8 to
17 psia. Resolution: 6 digits.

Beamex® POC8 Automatic Pressure Controller

70 Options

Typically, the pressure control unit in each device has limits of 10, 100 or
210 barg / 150, 1500 or 3,045 psig. If a measurement module is placed into a
device where the control unit has a higher upper pressure range, the maxi­mum control limit will be limited to the maximum range of the measurement
module.

Additional measurement modules

A secondary measurement module of any standard range, can be purchased as an option. In all
other regards, the add-on module will meet all of the specifications and operating parameters
outlines throughout this manual.

While any measurement module will function in any device, the results may not always be opti­mum. For example, if a 1 bar / 14.5 psi module is placed in a device that has a 100 bar / 1500
psi upper limit, the controlled pressure stability may not be acceptable.

Secondary measurement module installation

If the add-on measurement module is of a higher full scale range than the existing primary mod­ule, then this newer module becomes the Primary, and the existing module must be moved to
the Secondary Module slot. For complete installation instructions see chapter Removing the

measurement module on page 72.

Bench Mounting Kit

A rack mount kit is used to install POC8 into Beamex MCS200 Calibration Workstation.

POC8 Rack Mount Kit.

Fittings

POC8 is delivered with proper pressure connectors and hoses for supply pressure and vacuum.
The Barometric Module comes with a standard Barb fitting.

Beamex® POC8 Automatic Pressure Controller

Options 71

Re-calibrating

We recommend having the system re-calibrated by the manufacturer at regular intervals of ap­proximately 12 months. Every re-calibration at the factory also includes a comprehensive and
free checking of all system parameters.

POC8 requires almost no maintenance, because all moving parts are extremely robust. There
are no parts which have to be serviced by the user.

During each re-calibration the function of the integrated relief valves are checked.
Please contact Beamex when it is time to re-calibrate your POC8.

Dirt and Moisture Trap

Beamex Dirt and Moisture trap allow the user to operate POC8 in contamination prone areas. It
prevents in > 90 % efficiency contaminants like any liquids, oil or dirt to enter POC8 when the
direction of pressure flow is from device under test (DUT) to POC8 or when the device under
test is vented.

Beamex® POC8 Automatic Pressure Controller

72 Maintenance

There must be a measurement module installed in the “Primary Module” slot

for the system to function properly. If the system is operated with the pri­mary slot empty the system will display an error.

Maintenance

POC8 is designed for maintenance-free operation. User maintenance is not recommended. If
you have questions not covered by this manual, please contact Beamex.

Removing the measurement module

Follow the following instructions for removing or replacement the measurement module:

1. VENT THE SYSTEM by placing the device in vent mode. Then turn off the power.

2. Loosen the five Philips screws on the top cover of the device as seen in picture "Top view
of POC8" below and open the top cover to reveal the insides of the chassis (picture
"Chassis assembly").

3. Unscrew the thumb screw holding in the measurement module (lowermost picture below).

4. Apply a light inward pressure against the bottom of the module case, just below the
range label, while tilting the case upward to clear the clamp plate and screw head.

5. Pull the module outward, through the top opening.

Phillips screws.
    

Top view of POC8. Chassis assembly.

Measurement Module.

Beamex® POC8 Automatic Pressure Controller

Maintenance 73

Further access to the interior of the device is NOT recommended. There
are no user-serviceable plumbing or parts inside. In addition to the danger­ous voltages present (line voltage), there are circuits sensitive to electro­static discharge damage.

ESD PROTECTION REQUIRED! The proper use of grounded work surfaces
and personal wrist straps are required when coming into contact with ex­posed circuits (printed circuit boards) to prevent static discharge damage
to sensitive electronic components.

If faults cannot be corrected locally, immediately take the system off line
and protect it from unintentional restarts. Contact Beamex for further in­structions.

Problem / Type of Fault

Correction

The device has been switched on
and no measurement(s) have ap­peared and the entire area of the
screen is white (or dark).

Switch the device off. Wait 5 seconds and switch
the device on.

The screen is dark and the correc­tive action for #1 above has no ef­fect.

Check that the power cable is connected properly
and have authorized technical staff check that the
supply voltage is correct.

The screen is dark and the action
taken to solve the problem of #2
above has no effect.

Unplug the unit from the power source (wall
socket), then remove the power cord from the in­strument. The power cord input socket includes two
internal fuses. Check both fuses for continuity.

WARNING! When needed, use
only 1.25 amp 250V SLO-BLO
5x20 Fuse.

Malfunction during operation.

Switch the device off. Wait 5 seconds and switch
the device on.

Unstable control.

Consult Beamex.

The setpoint value is not reached.

Check whether the value of the supply pressure is
the value required, and leak test the plumbing.

!

Servicing of electrical, electronic or pneumatic equipment must be performed by qualified and
authorized technical staff, observing all relevant safety regulations.

Troubleshooting

Beamex® POC8 Automatic Pressure Controller

74 Calibration

Calibration

The POC8 automatically adjusts the pressure reading for the effects of temperature and nonlin­earity within the calibrated temperature range of 15 - 45°C. The process is referred to as dy­namic compensation because each reading is so adjusted before it is output to the display or to
a communication bus. Thus, a calibrated device operated within its temperature band, and with
proper zero and span adjustments, will provide accurate pressure measurements.

The POC8 should have the calibration verified periodically to insure stability. The recommended
calibration cycle is one year or six months depending on the pressure module range.

Environment

For maximum accuracy, allow the device to warm up a minimum of 15 minutes in ambient tem­perature within the compensated range prior to a calibration. In addition, the device should be at
rest on a stable platform that is free of excessive vibration and shock.

Pressure Standards

It is recommended to use appropriately accurate primary pressure standards when calibrating
this instrument. Such standards should be sufficient so that when the techniques of the ISO
Guide to the Expression of Uncertainty in Measurement (GUM) are applied, the device meets its
accuracy statements as required by ISO/IEC 17025:2005, or other applicable standards.

Media

The recommended calibration medium is dry nitrogen or clean dry instrument air. A height varia­tion between the standard and the POC8 can cause significant errors. A calculation should be
made to compensate for this difference. This compensation can be done as presented in chap­ter Head Pressure on page 80.

Beamex® POC8 Automatic Pressure Controller

Calibration 75

Please make note of a password change and save the new password in a
secure location.

Service View (unlocked)

The Service view can be accessed and unlocked by following the instructions in chapter Ser­vice View on page 47. The unlocked Service view will appear (see picture below). To re-lock

this screen, press the Lock button.

Unlocked Service view.

From the unlocked Service view, the Password can be changed by pressing the Enter button
next to the Change Password label. This will open a keypad where a new password can be en­tered and accepted by pressing the Check [ ] button.

The Unlocked Service view is the access point to all calibration screens described further on.

Beamex® POC8 Automatic Pressure Controller

76 Calibration

One point calibration.

Notice the reference
symbol [ ]. This is
a reference indica­tion giving a constant
reference point for
the level of the inter­nal sensor.

Calibration Data

The Calibration Data view [ ] is where the calibration data for each measurement module is
stored and amended. The Serial number (S/N), Zero offset (Zero) and Span offset (Span) can
be seen in this screen. The date of calibration, the calibration interval and the certificate number
can be entered by pressing the corresponding button, then saved by pressing the Check [ ]
button. To revert back to the factory calibration, press the “Restore Factory Cal” button. To view
the calibration data for each module press the “Channel” button at the top and choose a module
from the resulting channel selection menu.

Calibration Data.

One Point Calibration

A Single Point Calibration [ ] (usually a zero point calibration) of each measurement module
installed can be accomplished in “One Point Cal” tool. The module channel is chosen by pressing
the “Channel” button at the top of this screen, and then selecting from the list of installed module
channels. For gauge pressure simply expose the reference and the pressure port of the module
to atmospheric pressure and then press the “New Value” button and enter zero (0) using the key-
pad. For an absolute module apply a known reference pressure to the pressure port of the pres­sure module, press the “New Value” button and then enter the reference pressure (known true
pressure) using the keypad. If you want to save the value in the module, press Save.

Beamex® POC8 Automatic Pressure Controller

Calibration 77

Two Point Calibration

Two Point Calibration [ ] provides a place to adjust the measurement module Zero and Span
(sometimes referred to as the offset and slope).

Two Point Calibration.

Follow the steps below for a complete 2 Point Calibration:
Select a measurement module to calibrate by pressing the Channel button at the top of the

screen.

To calibrate the “Low Point”:

1. The pressure port of the module being calibrated should be supplied with a suitable, “low
point” pressure (see chapter Rear Panel on page 13 for the port location).

2. For a gauge module(s), this low point pressure can be achieved by opening the pressure
and reference ports to atmospheric pressure.

3. For an absolute module(s) a suitable source of vacuum should be applied to the Pres­sure port along with a high accuracy vacuum standard or a pressure calibration standard
can be connected to the Pressure port that can generate and measure a pressure value.
In either case the pressure should be measured at a stable value that is within 20% of
the minimum range of the selected internal pressure module.

4. When the pressure is stable, record the live reading shown on the Two Point Cal screen
and enter this value as the “Low Reading” by pressing the Low Reading button and en-
tering the number followed by the Check [ ] button. Record the “true pressure” ob-
tained from the reference standard and enter it as the “Low Reference” value in the
same manner.

Beamex® POC8 Automatic Pressure Controller

78 Calibration

To calibrate the ”High Point”:

1. The “High Point” Calibration is done in a similar way as the “Low Point”.

2. Supply a pressure to the Pressure Port of the module being calibrated, using a pressure
standard. This pressure should be as close as possible to the full scale value of the se­lected pressure module or at least within 20% of that value.

3. After the pressure stabilizes, record live reading shown on the Two Point Cal screen and
enter this value as the “High Reading” by pressing the High Reading button and entering
the number followed by the Check [ ] button. Record the “true pressure” obtained
from the reference standard and enter it as the “High Reference” value in the same man­ner.

4. After all four values (High Reference, High Reading, Low reference, & Low reading) have
been entered, the Adjust button will become active. Press the Adjust button to check and
accept the calibration data then press the Save button. The instrument will then prompt
with the question “Save Cal Data?” Pressing the check button [ ] in this screen will
save the calibration to the memory of the module.

Linearization

The Linearize Tool [ ] provides a place to record upscale and downscale calibration data and

to linearize each transducer using that data. An “as found calibration” can be performed by con-

necting a suitable pressure standard to the Pressure port of the measurement module being
calibrated, and supplying up to11 pressure points across the complete range. The record of the

pressures from the pressure standard and the corresponding reading from the devices’ module

can be recorded and transcribed into the Linearization Matrix. Linearization of each measure­ment module can be performed from this screen by selecting module channel using the channel
button in the top left hand corner.

Linearization Setup.

Beamex® POC8 Automatic Pressure Controller

Calibration 79

After calibration is complete, return to the Calibration Data View (chapter
Calibration Data on page 76) to record the certificate number, calibration
interval and the date of calibration. Restoration to factory calibration can
also be completed in this view.

The Linearization view automatically populates the screen with 10% increments from the low to
high pressure corresponding to the range of the pressure module selected. These values can
be changed to reflect the values generated by the standard and the corresponding readings
taken from the POC8. Each value from the standard can be entered under the reference col­umn, corresponding Upscale and Downscale readings from the device can be entered in the
“Upscale” and “Downscale” columns. To enter a value simply press the number and a key pad
will appear (see picture below) where the number can be entered. Press the check button [ ]
to accept each value. The “Average” column automatically averages the upscale and downscale
values.

Linearization Values.

The picture above shows some typical values that might be seen in a linearization calibration. In
the top right of the Operating Screen is the Graph Icon [ ] that, when pressed, reveals a Lin­earization Error Graph that gives a visual representation of the errors associated with the values
entered in the Linearization screen.

This Linearization error graph shows a scaling that corresponds to the maximum error calcu­lated from the data entered in the Linearization Matrix. It is a good indication of the overall error
of the module, and will quickly reveal any gross data entry errors that have been made. To revert
back to the Linearization Matrix press the Matrix Icon [ ].

When satisfied that all values have been entered correctly, press the adjust button and then the
save button to save the new calibration data in the transducer memory.

Beamex® POC8 Automatic Pressure Controller

80 Calibration

The Head Pressure should not be active when calibrating POC8 measure­ment modules. Before calibrating the Head height should be set at zero.
Difference in height between the laboratory standard and the POC8 during
calibration should be factored into the uncertainty analysis.

Head Pressure

The Head Pressure view [ ] provides an automated way to calculate the head pressure offset
between a device being tested and the POC8, based on:

Height: the difference between the device under test and the sensing element in

the measurement module inside the POC8

Gas Density: the media density of the pressure media
Gas Temperature
Local Gravity

The Head Pressure view is placed under the password protected area of the operator interface
to safeguard against inadvertent activation. It is intended to be used to accurately measure the
pressure at an external source that is at a different elevation from the POC8 measurement mod­ule sensing that pressure.

The four parameters are used to calculate the pressure that is a result of the different eleva­tions. It should not be used when calibrating POC8. Before calibrating the Head height should
be set at zero.

The picture below shows the Head Pressure screen. The height, gas density (Nitrogen or dry
air), gas temperature and local gravity can be entered here based on the specific setup of the
system.

Head Pressure, Pneumatic.

Beamex® POC8 Automatic Pressure Controller

Appendix 81

Code

Description

Output Format

1

pounds per square inch

PSI

2

inches of mercury @ 0°C

inHg 0°C

3

inches of mercury @ 60°F

inHg 60°F

4

inches of water @ 4°C

inH2O 4°C

5

inches of water @ 20°C

inH2O 20°C

6

inches of water @ 60°F

inH2O 60°F

7

feet of water @ 4°C

ftH2O 4°C

8

feet of water @ 20°C

ftH2O 20°C

9

feet of water @ 60°F

ftH2O 60°F

10

millitorr

mTorr

11

inches of seawater @ 0°C 3.5% salinity

inSW

12

feet of seawater @ 0°C 3.5% salinity

ftSW

13

atmospheres

ATM

14

bars

bar

15

millibars

mbar

16

millimeters of water @ 4°C

mmH2O 4°C

17

centimeters of water @ 4°C

cmH2O 4°C

18

meters of water @ 4°C

mH2O 4°C

19

millimeters of mercury @ 0°C

mmHg 0°C

20

centimeters of mercury @ 0°C

cmHg 0°C

21

torr

torr

22

kilopascals

kPa

23

pascals

Pa

24

dyne per square centimeter

Dy/cm2

25

grams per square centimeter

g/cm2

26

kilograms per square centimeter

kg/cm2

27

meters of seawater @ 0°C 3.5% salinity

MSW

28

ounce per square inch

OSI

29

pounds per square foot

PSF

30

tons per square foot

TSF

31

percent of full scale

%FS

32

micron HG @ 0°C

µHg 0°C

33

ton per square inch

TSI

34

n/a

n/a

35

hectopascals

hPa

36

megapascals

MPa

37

millimeters of water @ 20°C

mmH2O 20°C

38

centimeters of water @ 20°C

cmH2O 20°C

39

meters of water @ 20°C

mH2O 20°C

n/a

User Units 1

User defined

Appendix

Measurement Units

Beamex® POC8 Automatic Pressure Controller

82 Appendix

Code

Pressure Unit

To convert from PSI

To convert to PSI

1

PSI

1

1

2

inHg 0°C

2.036020

0.4911544

3

inHg 60°F

2.041772

0.4897707

4

inH2O 4°C

27.68067

0.03612629

5

inH2O 20°C

27.72977

0.03606233

6

inH2O 60°F

27.70759

0.03609119

7

ftH2O 4°C

2.306726

0.4335149

8

ftH2O 20°C

2.310814

0.4327480

9

ftH2O 60°F

2.308966

0.4330943

10

mTorr

51715.08

0.00001933672

11

inSW 0°C 3.5% salinity

26.92334

0.03714250

12

ftSW 0°C 3.5% salinity

2.243611

0.445710

13

ATM

0.06804596

14.69595

14

bar

0.06894757

14.50377

15

mbar

68.94757

0.01450377

16

mmH2O 4°C

703.0890

0.001422295

17

cmH2O 4°C

70.30890

0.01422295

18

mH2O 4°C

0.7030890

1.422295

19

mmHg 0°C

51.71508

0.01933672

20

cmHg 0°C

5.171508

0.1933672

21

torr

51.71508

0.01933672

22

kPa

6.894757

0.1450377

23

Pa

6894.757

0.0001450377

24

Dy/cm2

68947.57

0.00001450377

25

g/cm2

70.30697

0.01422334

26

kg/cm2

0.07030697

14.22334

27

MSW 0°C 3.5% salinity

0.6838528

1.462303

28

OSI

16

0.0625

29

PSF

144

0.006944444

30

TSF

0.072

13.88889

31

%FS

(PSI / RANGE) x 100

(% FS x RANGE) / 100

32

µHg 0°C

51715.08

0.00001933672

33

TSI

0.0005

2000

35

hPa

68.94757

0.01450377

36

MPa

0.006894757

145.0377

37

mmH2O 20°C

704.336

0.001419777

38

cmH2O 20°C

70.4336

0.01419777

39

mH2O 20°C

0.704336

1.419777

Conversion Factors, PSI

The values listed in the column “To convert from PSI” are the values embedded in the instru-
ment program. The values listed under “To convert to PSI” are internally calculated approxima-
tions based on the embedded values.

Beamex® POC8 Automatic Pressure Controller

Appendix 83

Code

Pressure Unit

To convert from millitorr

To convert to millitorr

1

PSI

0.00001933672

51715.08

2

inHg 0°C

0.00003936995

25400.08909

3

inHg 60°F

0.00003948117

25328.53093

4

inH2O 4°C

0.0005352534

1868.273977

5

inH2O 20°C

0.0005362028

1864.966281

6

inH2O 60°F

0.0005357739

1866.458778

7

ftH2O 4°C

0.00004460451

22419.25773

8

ftH2O 20°C

0.00004468356

22379.59744

9

ftH2O 60°F

0.00004464783

22397.50637

10

mTorr

1.0

1.000000022

11

inSW 0°C 3.5% salinity

0.0005206091

1920.827359

12

ftSW 0°C 3.5% salinity

0.00004338408

23049.92831

13

ATM

0.000001315786

760002.2299

14

bar

0.000001333220

750063.6259

15

mbar

0.001333220

750.0636259

16

mmH2O 4°C

0.0135954

73.5540997

17

cmH2O 4°C

0.001359544

735.5409971

18

mH2O 4°C

0.00001359544

73554.09971

19

mmHg 0°C

0.001

1000.000022

20

cmHg 0°C

0.0001

10000.00022

21

torr

0.001

1000.000022

22

kPa

0.0001333220

7500.636259

23

Pa

0.1333220

7.500636259

24

Dy/cm2

1.333220

0.750063626

25

g/cm2

0.001359506

735.561166

26

kg/cm2

0.000001359506

735561.166

27

MSW 0°C 3.5% salinity

0.00001322347

75623.11663

28

OSI

0.0003093875

3232.1992

29

PSF

0.002784488

359.132477

30

TSF

0.000001392244

718265.0575

32

µHg 0°C

1.0

1.000000022

33

TSI

n/a

n/a

35

hPa

0.001333220

750.0636259

36

MPa

0.0000001333220

7500636.259

37

mmH2O 20°C

0.01361955

73.42388114

38

cmH2O 20°C

0.001361955

734.2388114

39

mH2O 20°C

0.00001361955

73423.88114

Conversion Factors, millitorr

The following table lists factors which should be used as multipliers when converting other pres­sure units to or from millitorr.

Beamex® POC8 Automatic Pressure Controller

84 Appendix

Code

Pressure Unit

To convert from Pascal

To convert to Pascal

1

PSI

1.450377E-04

6.894757E+03

2

inHg 0°C

2.952997E-04

3.386390E+03

3

inHg 60°F

2.961339E-04

3.376850E+03

4

inH2O 4°C

4.014741E-03

2.490820E+02

5

inH2O 20°C

4.021862E-03

2.486410E+02

6

inH2O 60°F

4.018645E-03

2.488400E+02

7

ftH2O 4°C

3.345622E-04

2.988980E+03

8

ftH2O 20°C

3.351551E-04

2.983692E+03

9

ftH2O 60°F

3.348871E-04

2.986080E+03

10

mTorr

7.500636E+00

1.333220E-01

11

inSW 0°C 3.5% sal

3.904899E-03

2.560885E+02

12

ftSW 0°C 3.5% sal

3.254082E-04

3.073062E+03

13

ATM

9.869230E-06

1.013250E+05

14

bar

1.00000E-05

1.00000E+05

15

mbar

1.00000E-02

1.00000E+02

16

mmH2O 4°C

1.019744E-01

9.806378E+00

17

cmH2O 4°C

1.019744E-02

9.806378E+01

18

mH2O 4°C

1.019744E-04

9.806378E+03

19

mmHg 0°C

7.500636E-03

1.333220E+02

20

cmHg 0°C

7.500636E-04

1.333220E+03

21

torr

7.500636E-03

1.333220E+02

22

kPa

1.00000E-03

1.00000E+03

23

Pa

1.00000E+00

1.00000E+00

24

Dy/cm2

1.00000E+01

1.00000E-01

25

g/cm2

1.019716E-02

9.806647E+01

26

kg/cm2

1.019716E-05

9.806647E+04

27

MSW 0°C 3.5% sal

9.918444E-05

1.008222E+04

28

OSI

2.320603E-03

4.309223E+02

29

PSF

2.088543E-02

4.788025E+01

30

TSF

1.044271E-05

9.576052E+04

32

µHg 0°C

7.500636E+00

1.333220E-01

33

TSI

7.251885E-08

1.378951E+07

35

hPa

1.00000E-02

1.00000E+02

36

MPa

1.00000E-06

1.00000E+06

37

mmH2O 20°C

1.021553E-01

9.789017E+00

38

cmH2O 20°C

1.021553E-02

9.789017E+01

39

mH2O 20°C

1.021553E-04

9.789017E+03

Conversion Factors, Pascal

The following table lists factors which should be used as multipliers when converting other pres­sure units to or from Pascal.

Beamex® POC8 Automatic Pressure Controller

Appendix 85

Notes

Beamex® POC8 Automatic Pressure Controller

86 Appendix

Beamex® POC8 Automatic Pressure Controller

Appendix 87

Beamex® POC8 Automatic Pressure Controller