PP Systems EGM-4 Manual de usuario

EGM-4 Environmental Gas

Monitor For CO2

Operator’s Manual

Version 4.19

For Firmware (EPROM) Version 1.46 and Greater

14 February 2013

PP Systems

110 Haverhill Road, Suite 301

Amesbury, MA 01913 U.S.A.

Tel: +1 978.834.0505

Fax: +1 978.834.0545

Email: support@ppsystems.com

Web Site: http://www.ppsystems.com

This page left intentionally blank for printing purposes.

Table of Contents

EGM-4 Operator's Manual – Version 4.19

- 3 -

Table of Contents

Table of Contents...........................................................................................3

Preface............................................................................................................5

System Calibration........................................................................................5

User Registration..........................................................................................5

Warning Notice...............................................................................................6

Condensation Risk........................................................................................6

PP Systems’ Contact Information .................................................................7

Technical Specification.................................................................................8

Introduction....................................................................................................9

Measurement Principle.................................................................................9

Getting Familiar With The EGM-4...............................................................10

Front Panel ................................................................................................................... 10

Environmental Sensor Inputs (I/O Ports) ....................................................12

Analog Output.............................................................................................13

Current Output............................................................................................13

RS232 Port.................................................................................................13

Soda Lime Absorber Column......................................................................13

Soda Lime ........................................................................................................................ 14

Keypad........................................................................................................14

LCD Display................................................................................................14

Gas Ports....................................................................................................14

Battery ........................................................................................................14

Powering The EGM-4 With Internal 12V NiMH Battery...............................14

CHARGING THE INTERNAL 12V NiMH BATTERY........................................................ 15

Charge Cycle and LED Indications for 12V NiMH Battery Charger................................. 15

Charge Socket............................................................................................15

Power Supply/Charger ..................................................................................................... 15

Power Switch..............................................................................................16

Operation......................................................................................................17

Main Menu..................................................................................................19

1REC..........................................................................................................19

Stand Alone CO2Analyzer (Probe Type 0)...................................................................... 20

Measurement Mode Display Structure............................................................................. 21

Changing Plot Number..................................................................................................... 22

Environmental Monitor (Probe Types 1-6 and 10)........................................................... 22

PP Systems Environmental Sensor Conversions:........................................................... 23

Steady State Porometer (Probe Type 7).......................................................................... 23

Closed System Soil Respiration (Probe Type 8).............................................................. 24

Use of our PAR Sensor with SRC-1 Soil Respiration Chamber ...................................... 24

Oxygen (Probe Type 9).................................................................................................... 27

Open System Soil Respiration (Probe Type 11).............................................................. 27

Calculation Of Fluxes For CFX And CPY Chambers....................................................... 29

2SET...........................................................................................................30

1EGM ............................................................................................................................... 30

Probe Types..................................................................................................................... 30

Probe Setting Override..................................................................................................... 31

2Z ..................................................................................................................................... 31

Changing the Zero Type................................................................................................... 31

Table of Contents

EGM-4 Operator's Manual – Version 4.19

- 4 -

Changing the Zero Time................................................................................................... 32

3PMP................................................................................................................................ 32

Static Sampling with the EGM-4....................................................................................... 32

4AV................................................................................................................................... 32

5RECD ............................................................................................................................. 33

6ALM ................................................................................................................................ 33

Setting the Low CO2Alarm Setpoint................................................................................ 33

Setting the High CO2Alarm Setpoint ............................................................................... 34

7VOUT.............................................................................................................................. 34

3CAL...........................................................................................................35

Connecting Calibration Gas To The EGM-4 .................................................................... 35

4DMP..........................................................................................................36

Screen Display ................................................................................................................. 36

Data Dump ....................................................................................................................... 37

Transferring Stored Data Using The Windows®Based Software Program ..................... 37

Logging Data.................................................................................................................... 38

Record Structure .............................................................................................................. 38

Data Structure Based On Probe/Sensors........................................................................ 39

Error Cod.......................................................................................................................... 40

es...................................................................................................................................... 40

EGM Serial Outputs....................................................................................41

5CLR...........................................................................................................41

6CLK...........................................................................................................42

Diagnostics and Initialisation .....................................................................43

Diagnostics .................................................................................................43

Initialisation.................................................................................................43

Maintenance.................................................................................................44

Soda Lime Absorber Column......................................................................44

Soda Lime ........................................................................................................................ 44

MATERIAL SAFETY DATA FOR SODA LIME ................................................................ 45

Servicing The EGM-4..................................................................................46

Fuse.................................................................................................................................. 46

Inside the EGM-4.......................................................................................................... 47

Infrared Source................................................................................................................. 47

Checking EGM-4 Raw A/D Readings .............................................................................. 48

EPROM ............................................................................................................................ 48

ZERO Valve...................................................................................................................... 49

12V Lead Acid Battery...................................................................................................... 49

12V Lead Acid Battery Specification................................................................................ 49

Removing The 12V Lead Acid Battery............................................................................. 49

12V NiMH Battery............................................................................................................. 50

12V NiMH Battery Specification....................................................................................... 50

Removing The 12V NiMH Battery.................................................................................... 50

Air Sampling Pump........................................................................................................... 51

Replacing The Air Sampling Pump .................................................................................. 51

Cleaning The Air Sampling Pump.................................................................................... 51

In-Line Filter Assembly (Hydrophobic)............................................................................. 52

Consumables and Spares for EGM-4.........................................................53

User Notes....................................................................................................54

Preface

EGM-4 Operator's Manual – Version 4.19

- 5 -

Preface

It is extremely important that you take the time to review this operator’s manual prior to

installation and operation of the EGM-4 CO2Gas Analyzer. Otherwise, damage may be

caused which is not covered under our normal warranty policy. This operator’s manual is

relevant to all EGM-4’s running firmware (EPROM) version 1.30 and higher.

System Calibration

•This product is shipped as a factory calibrated system. System calibration is not

required upon receipt from our factory.

•Familiarization with the documentation and calibration procedures is required prior to

future recalibration. See section 3CAL on page 35 of this manual.

•All calibration related questions may be directed directly to PP Systems at:

Telephone: +1 978.834.0505

Fax: +1 978.834.0545

Email: support@ppsystems.com

User Registration

It is very important that ALL new customers register with us to ensure that our user’s list is

kept up to date. If you are a PP Systems’ user, please register yourself electronically on our

web site at http://www.ppsystems.com/user_registration2.htm .

Only REGISTERED users will be allowed access to our protected “Users” section of our web

site. This section will contain important product information including hardware/software

updates, application notes, newsletters, etc.

Thank you in advance for your cooperation.

The warranty excludes all defects in equipment

caused by incorrect installation, operation or

maintenance, misuse, alteration, and/or

accident.

Warning Notice

EGM-4 Operator's Manual – Version 4.19

- 6 -

Warning Notice

This instrument must not be used in situations where its failure could result in injury or

death. For applications where failure of this instrument to function correctly would

lead to consequential damage, the Analyzer must be checked for correct operation and

calibration at intervals appropriate to the criticality of the situation.

This manual is provided to help you install and operate the equipment. Every effort has been

made to ensure that the information contained in this manual is accurate and complete. PP

Systems does not accept any liability for losses or damages resulting from the use of this

information. PP Systems' equipment warranty is limited to replacement of defective

components, and does not cover injury to persons or property or other consequential

damage. This manual, and the information contained in it, is copyright to PP Systems. No

part of the manual may be copied, stored, transmitted or reproduced in any way or by any

means including, but not limited to, photocopying, photography, magnetic or other mechanical

or electrical means, without the prior written consent of PP Systems.

The EGM-4 is covered under warranty for one complete year, parts and labour included.

This, of course, is provided that the equipment is properly installed, operated and maintained

in accordance with written instructions (i.e. Operator's Manual). The warranty excludes all

defects in equipment caused by incorrect installation, operation or maintenance,

misuse, alteration, and/or accident.

If for some reason, a fault is covered under warranty, it is the responsibility of the customer to

return the goods to PP Systems or an authorised agent for repair or replacement of the

defective part(s).

Condensation Risk

If condensation occurs in the analysis sample line, free water may enter the analyzer causing

serious damage which will result in a very expensive repair. Therefore, it is critical that you

periodically inspect the pipeline to be sure that condensed water does not enter the analyzer.

If the EGM-4 is supplied on its own, we do NOT supply any external filters. If the EGM-4

is used in conditions where there is risk of condensation or water in the sample line, (i.e.

when used with the SRC-1, CPY-2, CPY-4 or CPY-3 chambers for measurement of

soil/canopy assimilation, we strongly recommend fitting our hydrophobic filter to the “Gas In”

port as shown below. Our hydrophobic filter assembly (Part No. 10045-1) is supplied with all

SRC-1’s, CPY-2’s, CPY-4’s and CPY-3’s. All EGM-4 customers can purchase this filter from

PP Systems (Part No. 10045-1) at any time if required. In addition, when this filter is used, it

must be checked regularly and replaced as when dirty or wet. Otherwise, blockage can

occur.

Our in-line filter assembly

(Part No. 10045-1)

Warning Notice

EGM-4 Operator's Manual – Version 4.19

- 7 -

For maintenance instructions, see In-Line Filter Assembly (Hydrophobic) on page 52.

Very Important

If there is any risk of of water entering the EGM-4, you must protect the instrument by using

an external 3 µm hydrophobic filter (Part No. 10045-1) or water drop out trap. We strongly

recommend using 3 µm filters as any other size may cause damage to the pump. If a

water drop out trap is used, it should be regularly checked and emptied as required.

If condensation persists, it is then recommended that a PP Systems’ water vapor equilibrator

(Part No. 10049-1) is used (see picture below). This is constructed from a material that is

very permeable to water vapor but impervious to CO2. If this is placed in-line in the analysis

pipe at the sampling point, the water vapor concentration of the analysis air will be brought

close to ambient.

Part No. 10049-1 Water Vapor Equilibrator fitted to top of EGM-4

The problem may also be avoided by putting a suitable water drop out trap or drier in the

same position. Drierite (anhydrous Calcium Sulphate) is suitable. DO NOT use Silica Gel,

which also absorbs CO2.

Please note that any method used to remove excess water from the analysis

sample will render any humidity measurement incorrect.

If you have any questions whatsoever with regards to possible condensation risk,

contact PP Systems (See PP Systems’ Contact Information on page 7).

PP Systems’ Contact Information

PP Systems

110 Haverhill Road, Suite 301

Amesbury, MA 01913 U.S.A.

Tel: +1 978.834.0505 Fax: +1 978.834.0545

Support: support@ppsystems.com

Sales: sales@ppsystems.com

Service: service@ppsystems.com

Technical Specification

EGM-4 Operator's Manual – Version 4.19

- 8 -

Web Site: http://www.ppsystems.com

Technical Specification

Analysis Method

Non-dispersive infrared with microprocessor control and linearisation.

Measurement

Range

(CO2)

0-1,000 ppm (µmol mol-1)

0-2,000 ppm (µmol mol-1)

0-5,000 ppm (µmol mol-1)

0-10,000 ppm (µmol mol-1)

0-20,000 ppm (µmol mol-1)

0-30,000 ppm (µmol mol-1)

0-50,000 ppm (µmol mol-1)

0-100,000 ppm (µmol mol-1)

Measurements are automatically corrected for temperature and pressure.

Accuracy (CO

)

< 1% of span concentration over the calibrated range, but limited by the

accuracy of the calibration gas mixture.

Linearity

< 1% throughout the range.

Stability

Automatic Zero at regular intervals. It corrects for sample cell

contamination, source and detector ageing and pre-amplifier gain

changes.

Sample Pump

Integral DC pump operating at a flow rate of approximately 350 ml/min.

Pump can be disabled for static measurements on demand.

Gas Flow Rate

Through Analyzer

Minimum flow rate: 200 ml/min

Maximum flow rate: 400 ml/min

Environmental

Sensor Interface

Two inputs available for use with external sensors (humidity, temperature,

PAR, oxygen, soil respiration, canopy assimilation, etc.).

Air Filter

Filtered sample line (hydrophobic)

Calibration

Default value preset in factory (Built-in Initialization). Automatic

calibration via keypad if required.

CO2Control

High and low set points

Alarm

Audio Alarm

Real Time Clock

Accuracy > 1 minute per month at 25˚C, operating temperature 0-70˚C.

Automatic correction for month end and leap years.

Recording

Manual (by keypress) or automatic at user selected intervals between 1

and 250 minutes.

Keypad

Custom, tactile keypad

Data Storage

512 K Battery backed RAM (1,000 records).

Response Time

Display/analog output: 1.6 seconds

Analog Output

(CO2only)

4-20 mA, 0-1 V, 0-2 V, 0-3 V, 0-4 V, 0-5 V (Linear)

Digital Output

(RS232)

9600 baud/8 data bits, 1 start bit/2stop bits/no parity

ASCII Format

Display

High contrast 2 x 16 character LCD.

Power Supply

12 V, 2.0 Ah Rechargeable Lead Acid Battery providing up to 4 hours

continuous use or 12V NiMH rechargeable battery providing up to 8 hours

continuous use. Longer times available with external 12V battery. Battery

life may be reduced when EGM-4 is used with add-on

sensors/accessories.

Gas Connections

Two barbed fittings (inlet and exhaust) for 1/8” (.125”) ID tubing.

Housing

High impact, aluminum enclosure.

Operating

Environment

-5oC – 50o C, non-condensing. In dirty or high humidity environments,

external air filtration is required.

Dimensions

18 cm (W) x 21.5 cm (H) x 6.3 cm (D)

Weight

1.9 kg

Introduction

EGM-4 Operator's Manual – Version 4.19

- 9 -

PP Systems is continuously updating its products and reserves the right to amend product

specifications without notice.

Introduction

The EGM-4 CO2Analyzer is a portable operated unit that is powered by an internal 12 V, 2.0

Ah lead acid rechargeable battery providing up to 4 hours continuous use or 12V NiMH

rechargeable battery providing up to 8 hours continuous use. For extended operation in the

field, PP Systems can also provide an external power supply cable that will allow you to

connect up to an external 12 V battery. If interested, please contact PP Systems (See PP

Systems’ Contact Information on page 7).

The EGM-4 is a high precision instrument for use in CO2monitoring applications such as

greenhouses, environment control rooms, nurseries and laboratories. Long term stability and

accuracy is ensured as a result of our unique “Auto-Zero” technology. The EGM-4 also

features inputs for additional sensors for measurement of humidity, temperature, PAR, O2,

soil respiration, soil temperature and canopy assimilation.

Measurement Principle

The EGM-4 CO2is a non-dispersive, infrared gas analyzer that features an “Auto-Zero”

facility. Using infra-red gas analysis techniques, we can readily determine CO2(Carbon

Dioxide) concentrations to within a few ppm and instantaneous measurements are possible.

Gases with di-atomic molecules such as CO2strongly absorbs photons in the infra-red range.

For CO2 , one region of strong absorption is 4.26 microns. A source emitting strongly at this

wavelength is a light bulb. If this is positioned at one end of a tube and at the other end is

placed a sensor that is sensitive to photons at 4.26 microns, we have a simple infra-red gas

Analyzer. As carbon dioxide is passed down the sample cell, it absorbs some of the infra-red

and the sensor reading decreases. The “Auto-Zero” feature, which occurs at regular

intervals, allows for fast warm-up, adaptation to changing ambient conditions and excellent

stability of the CO2signal. The action of auto-zeroing minimizes the effects on span (gas

sensitivity) of sample cell contamination, source aging, changes in detector sensitivity and

changes in pre-amplifier gain.

The entire optical bench assembly (i.e. sample cell) is filtered and should never require

replacement.

To ensure proper operation, the EGM-4 MUST always

be operated in a vertical, upright position.

The EGM-4 can be supplied with two different optical benches. One bench is optimized for

measurement of CO2in the ranges of 0-1,000 ppm up to 0-30,000 ppm. The other optical

bench is optimized for 0-50,000 ppm and 0-100,000 ppm. All instruments are checked and

calibrated at the concentration specified at time of order to ensure that the readings are < 1%

of that value. When an instrument is reset to its default values (i.e. when the system is

initialised, see Initialisation on page 43), it returns to this setting.

It is important to note that the information contained in this documentation normally

refers to the latest firmware (EPROM) which can change over time. We recommend

that all users keep in contact with us from time to time to ensure that they are running

the most up to date system firmware.

Getting Familiar With The EGM-4

EGM-4 Operator's Manual – Version 4.19

- 10 -

Getting Familiar With The EGM-4

Front Panel

Figure 1 EGM-4 Display (Front Panel)

LCD Display

(2 x 16)

Character

Custom,

tactile

keypad

Sensor I/O

Connectors

RS232

Connector

Gas In Port

Gas Out Port

4-20 mA

Access Hole

Tabla de contenidos

Manuales populares de Monitor de otras marcas

Linear Acoustic

Linear Acoustic LQ-1000 Manual de usuario

AOC

AOC I2579V Manual de usuario

Gateway

Gateway FPD1520 Manual de usuario

Furuno

Furuno Mu 120c Manual de usuario

Asus

Asus VB171D - 17" LCD Monitor Manual de usuario

Dell

Dell S2230MX Instrucciones de uso

Philips

Philips 107C64 Manual de usuario

Dell

Dell S2409WFP Manual de usuario

EverFocus

EverFocus EN-7517E Manual de usuario

Panasonic

Panasonic TH152UX1 - 152" PLASMA TV Manual de usuario

Dell

Dell Precision 7680 Manual de instrucciones

LG 50PM1M - - 50" Plasma Panel Manual de usuario

Bosch

Bosch DDU 9 Manual de usuario

Acer

Acer A231HL Manual de usuario

Philips

Philips 86BDL4152T Manual de usuario

NEC

NEC AccuSync LCD5V Manual de usuario

Emay

Emay SleepO2 Manual de usuario

IBM

IBM 6360 Instrucciones de instalación