Mantech L100 PeCOD Manuale utente

L100 PeCOD® COD ANALYZER

Operation Manual

 
 
 
 
2
Table of Contents 
1Introduction ..................................................................................................................................................................................3
1.1 The L100 PeCOD® COD Analyzer...........................................................................................................................................3
1.2 Theory of Operation Mechanism .........................................................................................................................................3
 Photocatalytic Oxidation ............................................................................................................................................3
1.3 Technical and General Specifications ...................................................................................................................................4
2General Information......................................................................................................................................................................5
2.1 Safety Information................................................................................................................................................................5
 Use of Hazard Information..........................................................................................................................................5
 Precautionary Labels ..................................................................................................................................................6
2.2 Overview of Product and Function.......................................................................................................................................6
 User Interface (front panel) ........................................................................................................................................7
3Installation ....................................................................................................................................................................................7
3.1 Unpacking the Instrument....................................................................................................................................................7
3.2 Operating Environment ........................................................................................................................................................8
3.3 Power Connections ..............................................................................................................................................................8
3.4 Battery Power.......................................................................................................................................................................8
3.5 Personal Computer (PC) Connection ....................................................................................................................................8
4System Operations ........................................................................................................................................................................8
4.1 Overview ..............................................................................................................................................................................8
4.2 Getting Started – Powering the Analyzer On........................................................................................................................9
4.3 Preparation of Solutions.......................................................................................................................................................9
4.4 Priming of Lines..................................................................................................................................................................10 
4.5 New Sensor Routine and Calibration..................................................................................................................................10 
4.6PeCOD® Menu Structure ....................................................................................................................................................11 
4.7 Running a Sample...............................................................................................................................................................15 
4.8 Other Operational Functions..............................................................................................................................................16 
 Event Log ..................................................................................................................................................................16 
 Run Standby..............................................................................................................................................................16 
4.9 Diagnostic Functions .....................................................................................................................................................16 
 Factory Settings ........................................................................................................................................................16 
 System Reset.............................................................................................................................................................17 
 Set PIN Number ........................................................................................................................................................17 
 Erase Logs .................................................................................................................................................................17 
5Preventitive Maintenance ...........................................................................................................................................................18 
5.1 Cleaning Requirements ......................................................................................................................................................18 
            Tubing and Fluids......................................................................................................................................................18 
 Analyzer ....................................................................................................................................................................18 
 Sensor.......................................................................................................................................................................18 
5.2 Battery Pack .......................................................................................................................................................................18 
5.3 System Storage...................................................................................................................................................................18 
            Flushing and Storing the Electrode Block .................................................................................................................18 
6Troubleshooting ..........................................................................................................................................................................19 
6.1 System Diagnostics.............................................................................................................................................................19 
6.2 Removing Blockages from the PeCOD® Analyzer ...............................................................................................................23 
7Replacement Parts, Accessories and Consumables ....................................................................................................................24 
Appendix 1 Warranty..............................................................................................................................................................25 
Warranty ..........................................................................................................................................................................................25 
Change to specifications...................................................................................................................................................................26 
Liability .............................................................................................................................................................................................26 
Appendix 2 Glossary of Terms.................................................................................................................................................27 

1. Introduction

1.1 The L100 PeCOD® Soluble COD Analyzer

Thank you for purchasing the L100 PeCOD® COD analyzer. The L100 PeCOD® COD analyzer has been specifically

designed for quantifying the organic content using a patented photo-electrochemical technique to determine the

Chemical Oxygen Demand (COD). No toxic reagents are required, making this technique an environmentally

friendly method for COD and rapid screening of Biological Oxygen Demand (BOD).

MANTECH products are manufactured, tested and calibrated to meet published standard specifications under

our strict quality assurance guidelines. The main components consist of the sensor, electrode block, light source,

and three ports (one each for sample, blank solutions and waste).

Please read this manual thoroughly before operating your L100 analyzer.

The L100 analyzer is designed to be used only by properly qualified and trained personnel.

1.2 Theory of Operation Mechanism

Photocatalytic Oxidation

The PeCOD® L100 analyzer employs a unique patented technology that can directly measure photocurrent

originating from the oxidation of organic species contained in a sample. The core of the technology is the PeCOD®

sensor, which consists of a UV-activated nano-particulate TiO2 (titanium dioxide) photocatalyst coupled to an

external circuit.

The sample is introduced into a microcell containing the sensor. The TiO2 is irradiated by UV light, and a potential

bias is applied. The UV light creates a photo hole in the TiO2 sensor with a very high oxidizing power (3.1V) and

organic contents in the cell are oxidized (the chemical potential of the dichromate method is only 1.6V). The

PeCOD® COD analyzer exhaustively oxidizes organics, and counts the electrons that are liberated to provide a

direct measure of equivalent COD.

The following figure illustrates the photo-electrocatalytic process involved in the analytical signal generation.

The PeCOD® L100 analyzer gives a direct measurement of the oxidation of organic compounds, thus providing a

real measurement of organic pollutants and not an inferred one. The reaction produces mainly carbon dioxide

& water from organic C, H and O.

1.3 Technical and General Specifications

* Specifications are subject to change without notice

ANALYSIS DATA

Oxidation process

Photocatalytic oxidation

Catalyst

Titanium Dioxide (TiO2)

Method Detection Limit

*0.7ppm

Reproducibility

+/- 10%

Light source

UV LED

*MDL determined for Advanced Blue range

GENERAL SPECIFICATIONS

Construction

ABS

Dimensions (approximate L x W x H)

370mm x 230mm x 240mm

Weight

< 5 kg

Security

4 digit pin (optional)

Parameter(s)

COD (unit of measurement: ppm or mg/L)

BOD (ppm or mg/L)

Measurement

Dilution ≤ 15,000 ppm

ELECTRICAL AND STANDARDS CONFORMITY

Power Requirements

100V to 240V AC / 45 to 65 Hz INPUT – 24V DC X

Amp OUTPUT, Optional battery pack for field use

Current Consumption

2.0 A (maximum)

Enclosure

IP55 to EN60529

Protection Class

Continuous short circuit protection. CEC Level IV

compliant. UL compliant

EMC Emission and Noise Immunity

EN61326-1:2006

FCC Part 15 Subparts A and B

Certification

CE. FCC

Environmental conditions

Ambient Operating Temperature: 10 to 30 °C

Storage Temperature: 5 to 40 °C

Relative Humidity: Max 90% non-condensing

DATA DISPLAY, INPUTS AND OUTPUTS

Display

4 x 20 characters

Keypad

Splash resistant capacitive touch user interface

Data Presentation

Alpha Numeric

Data Logging

Up to 200,000 measurements, events and faults

Fault Monitoring

Error code reporting of faulty conditions

Computer Interface

USB for data and control

2. General Information

2.1 Safety Information

Please read this entire manual before unpacking, setting up and operating this equipment. Pay attention to all

danger and caution statements. Failure to do so could result in damage to the equipment.

To ensure that the protection provided by this equipment is not impaired, do not use or install this equipment in

any manner other than that specified in this manual.

In addition to the instructions in this manual, users must comply with the national general safety and accident

prevention regulations of the country in which the instrument is used.

The UV light is automatically cut off when the analyzer head is open. However, as a safety measure, do not look

directly into the UV light source at any time.

Use of hazard information throughout this manual:

CAUTION

Indicates a potentially hazardous situation that may result in minor or moderate injury.

IMPORTANT NOTE

Information that requires special emphasis.

NOTE

Information that supplements points in the main text.

Precautionary Labels

Read all labels and tags attached to the instrument. Although highly unlikely, personal injury or damage to the

instrument could occur if not observed.

2.2 Overview of Product and Function

The L100 analyzer is comprised of the following major components:

•Sensor: contains the cell and TiO2 (working electrode) and is the location for photocatalytic activity.

•Electrode block: contains the reference and auxiliary electrodes.

•UV LED as the light source: 400nm wavelength

•Detector (potentiostat)

•Port A and Port B for sample and blank solutions, respectively

•Port W for waste solution

The L100 employs a unique nanotechnology-based photo-electrochemical technique for the determination of

COD in natural and wastewater samples in laboratory and field analyses. It is:

•fast (a typical analysis takes less than 15 minutes),

•sensitive (detection limit at 0.7 ppm level in Advanced Blue range),

•environmentally friendly (does not require any toxic / hazardous chemicals),

•robust, and

•free of the matrix effect due to the highly effective photo-electrochemical system employed that is

capable of fully oxidizing a wide spectrum of organics.

The photocurrent generated is detected with a potentiostat.

The L100 analyzer provides digital readout of COD in ppm or mg/L units. It also provides the equivalent BOD value

(if this function is selected during the parameter set up).

When a user-generated or programmed method is selected, the on-screen menus and prompts direct the user

through the test. The L100 analyser can be connected to a PC with pre-installed software using a USB cable. See

"Note:" in Section 3.5

User Interface (front panel)

The L100 analyzer has nine touch keys on its splash proof keypad;

POWER, MENU, RUN, EXIT, ENTER, UP, DOWN, LEFT and RIGHT arrow touch keys.

In addition to this, it also has a status indicator for 'READY' (Green), ‘OFF’ (Red) and 'FAULT / BUSY' (Yellow).

3. Installation

Caution: Only qualified personnel should conduct the tasks described in this section of the manual.

3.1 Unpacking the Instrument

Please refer to the standard packing list included with your L100 for a complete list of L100 accessories and items.

If any of these items are missing or damaged, contact MANTECH or your local authorized MANTECH

representative immediately.

Important Note: Retain the original packaging materials. Instruments returned for service should be shipped in

the original packaging material to protect against damage during transportation.

POWER

RUN

EXIT

ENTER

STATUS

ARROW KEYS

3.2 Operating Environment

The following conditions are necessary to ensure correct instrument operation and accurate results:

•Place the instrument firmly on an even surface. Do not place any objects above or under the instrument.

•Maintain an ambient temperature of 5ºC to 30ºC for proper instrument operation.

•The relative humidity should be less than 90%; moisture should not condense on the instrument.

•Leave at least a 15 cm (6 in.) clearance at the top and on all sides for air circulation to avoid overheating

of electrical parts.

•Do not operate or store the instrument in extremely dusty, damp or wet locations.

•Keep the surface of the instrument, the cell compartment, and all accessories clean and dry. Splashes or

spills on and in the instrument should be cleaned up immediately.

Important Note: Protect the instrument from temperature extremes, including heaters, direct sunlight, and other

heat sources.

3.3 Power Connections

Plug the power supply into the appropriate connector on the back panel of the analyzer, then plug the power

cord into a power outlet (100 – 240 V~ / 45 – 60 Hz). Touch the red power key on the top right of the analyzer to

turn the instrument on.

3.4 Battery Power

The L100 can also be powered using a battery pack (intended for portable field use). The battery pack is plugged

into the back panel of the analyzer. Please refer to section 5.2 5.2 Battery Pack for more information on battery

charging.

3.5 Personal Computer (PC) Connection

The L100 has one USB interface located on the back of the analyzer. This is used for communication with a PC.

The software is supplied preinstalled on laptop PC and is available for purchase from MANTECH or one of its

authorized distributors.

Note: USB cables must not be longer than 3 meters (10 feet).

4. System Operations

4.1 Overview

The following are the steps involved in setting up the L100 analyzer for sample analysis:

1. Preparation of solutions (calibration/reference, blank and sample).

2. Priming lines and analyzer assembly.

3. Pre-conditioning of sensor/calibration.

4. PeCOD® menu structure

The L100 analyzer operates according to four COD ranges as per the following table:

COD range (ppm)

Advanced Blue

< 25

Green

< 150

Yellow

< 1,500

Red

< 15,000

4.2 Getting Started – Powering the Analyzer On

1. Place the L100 analyzer on a stable, level surface.

2. Plug the power supply into the appropriate connector on the back panel of the analyzer, then plug the

power cord into a power outlet (100 –240 V~ / 45 –60 Hz).

3. Touch the red power key on the top right of the analyzer to turn the instrument on. The LCD screen will

be displayed after several seconds and 'READY' above the POWER key will be illuminated in green.

4.3 Preparation of Solutions

For samples with a known COD range, the original sample should be diluted with the appropriate electrolyte as

per the table below. The calibration and blank solutions should also be prepared using the same dilution factor

as was used for the sample.

The following table lists the four COD ranges available and their corresponding dilution factors:

COD Range

(ppm)

Dilution

Dilution Factor

Advanced Blue

0.7 - 20

3 parts X : 1 parts Advanced Blue electrolyte

1.33

Green

10 - 150

1 part X : 1 part Green Electrolyte

Yellow

40 - 1,500

1 part X : 9 parts Yellow Electrolyte

Red

80 - 15,000

1 part X : 49 parts Red Electrolyte

Note: (i) For the sample: X= the original sample

(ii) For the blank solution: X=COD free water

(iii) For the Reference/Calibration solution: X= the original calibrant solution supplied by MANTECH

For example, if you are analysing in the Yellow range;

1. Mix 1 part of your original sample with 9 parts Yellow Electrolyte

2. Mix 1 part of COD-free water with 9 parts Yellow Electrolyte to make your blank solution

3. Mix 1 part of the original Calibrant solution (supplied by MANTECH), with 9 parts Yellow Electrolyte to

make your "reference" or "calibration" solution

Ensure you prepare sufficient amounts of each solution, taking into account the volume required for priming

(~2mL per prime), calibration and sample analysis. It is recommended to prepare a total minimum volume of

20mL for each sample, and 250mL and 500mL of pre-mixed calibrant and blank, respectively.

4.4 Priming of Lines

Always prime both Port A and Port B lines 3 times before any analysis to ensure that both lines are filled with

liquid and there are no air bubbles present. This can be confirmed by visually checking all flow lines. For

automated system, 6 primes of Port A are required to accommodate the longer sampling line.

To prime the lines manually from the touchpad:

1. Press MENU.

2. Arrow down to select Operation and press ENTER.

3. In the Operation menu, select Prime Lines and press ENTER.

4. In the Prime Lines menu, select Prime Port A and press ENTER. The solution will flow in through the

tube connected into Port A and flow out through the tube connected to Port W. The analyzer will beep

twice at the end. Repeat two more times.

5. In the Prime Lines menu, arrow down to select Prime Port B and press ENTER.

The solution will flow in through the tube connected into Port B and flow out through the tube

connected to Port W. The analyser will beep twice at the end. Repeat two more times.

4.5 New Sensor Routine and Calibration

Important Note: It is recommended that the system be calibrated a minimum of two times each day it is in use

to ensure that the sensor is fully conditioned before running samples. The “New Sensor Routine” can be used to

speed up the process of “breaking-in” a new sensor.

To run a new sensor routine manually from the touchpad:

1. Press MENU.

2. Arrow down to select Set up and press ENTER.

3. In the Set up menu, arrow down to select Sensor Operation and press ENTER.

4. Select New Sensor and press ENTER.

5. At the prompt “Confirm new sensor?”, press ENTER. The PeCOD® will now begin the new sensor

routine, which comprises of a normalization and burn-in phase of Port B.

6. After 2.5 minutes, the analyzer will beep and ask the user to verify the COD range. Press ENTER to

confirm the range. The PeCOD® will now do a full calibration.

7. Partway through the calibration, the system will beep again. Press ENTER to continue.

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