Duomo Vent Check Pro User Manual

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Keypad (Fig.1)

B C

Vent Check Pro (CO + CO2)

Operation

Press button 1 to turn the meter on and off.

After a 30 second warm-up the meter is ready to use and will display the normal operating screen (Fig. 2). To sk ip the warm up, press and hold button 6 for 2 seconds. It is advisable, however, to allow the unit to perform its full setup.

During operation the display will automatically cycle through the current level of CO

and CO. Press button 5 to see the current air temperature.

Pressing button 6 will cycle through minimum, maximum, average and current readings. In this mode the time at the bottom will change to show you how long youhavebeeninthismode.

Pressing any button will turn the backlight on for 10 seconds.

The unit will turn off automatically after 20 minutes of inactivity.To override this function, turn the unit off then restart it by holding down button 2 then turning it on with button 1.

The meter will take a new reading every second. When the operating conditions change, the unit will respond in 30 seconds for CO

When battery supply is low, 'Lob' will be displayed. Change the batteries or connect the DC adaptor.

NOTE: Do not hold the meter close to the face as exhalation can affect CO

readings.

Normal Operation (Fig.2)

A =Current

measurement type (CO

,CO

or TA)

B = Current level C = Current date /

time

Triple reading and display of CO2, CO and temperature NDIR sensor for CO

detection Datalogging capability (downloadable via USB) Statistics of weighted averages BS8494 compliant (from 10 - 60 ºC) Backlight for working in dark areas Programmable and audible warning alarms Easy manual fresh air correction on CO

PC connection via USB interface With hard case and power adaptor Can be used with rechargeable batteries

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cycle through the minimum, maximum and average readings of each parameter automatically. To return to normal mode,press button 3.

Pressing button 2 will hold all current readings and HOLD flashes in the top left of the screen. Press again to exit hold mode.

Recording (Manual)

The Vent Check Pro can manually record up to 99 points of data.

In normal mode, press button 4 to record a data point. The REC icon flashes on screen for about 3 seconds and the screen displays the data point number (1 - 99). Each point recorded contains information on the current CO

CO and air temperature.

You can view all manually recorded data points at any time by using button 5. Press and hold it for 2 seconds

Che

kPro

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or more until 'Recall' appears on screen.

Press buttons 2 and 4 to cycle up and down through all recorded data points stored on the unit. The data point number will appear on screen first, followed by the stored reading. Pressing button 5 will then cycle through each parameter. The time at which the data was recorded will also appear at the bottom of the screen.

To exit the recall mode, press button 3.

Recording (Automatic)

As well as recording data manually,the Vent Check Pro also allows you to datalog automatically.The unit can store up to 30,000 data points (10,000 data points each for CO

,CO and temperature). The sampling rate can be altered in the advanced setup menu and can be set from 1 second to 4 hours, 59 minutes and 59 seconds.

To begin datalogging press button 3 for 2 seconds. The REC icon will flash at the bottom of the screen. Pressing button 3 again for 2 seconds will stop the datalogger. NOTE: Each time you star t the datalogger you will overwrite the previously recorded data.

During datalogging you can still cycle through all three parameters.

Setup

To enter setup, make sure the unit is turned off then press and hold button 1 for more than a second. To exit this at any time,simply press button 3.

There are six setup options within this menu;

Use buttons 2 and 4 to cycle through each of the six options and their parameters and then button 6 to confirm a selection.

CLr

To delete all manually stored data points scroll to 'yes' and confirm your selection. Press button 3 at any time to escape back to the top menu.

ALAr

To set the audible alarm threshold for CO & CO

detection, scroll through to the level required and confirm your selection. Available levels range from 15 to 200ppm in 5ppm increments for CO and 400 to 2000ppm in 50ppm increments for CO

unit

Select whether to display the temperature on screen using degrees centigrade or fahrenheit.

rATE

Press button 6 to start setting the sampling rate. The hours will flash first, use buttons 2 and 4 to set. Pressing button 6 to move on to the minutes and repeat with the seconds. The final push of button 6 will confirm your selection and return to the main menu. The range is from 1 second to 4 hours,59 minutes and 59 seconds.

PrES

If operating at high altitudes the barometric pressure value of this unit may need adjusting from the standard of 1013hPa.(Range is 700 - 1990hPa).

rtC

The first option that appears is whether to use the 24 hour clock or not. Select 24 or 12, confirm your selection then set the date (day, month, year) using buttons 2 and 4, followed by 6 to set it. The time can then be set (hours, minutes,seconds) by the same method.

Fresh Air Correction & Calibration

CO2Fresh Air Correction

It is strongly suggested that the unit be corrected in a sunny, outdoor environment that is well ventilated. Do not correct the unit in places crowded with people or close to areas with high CO

concentration such as

ventilating outlets or fireplaces.

To correct the unit for CO

make sure that it is turned off and place it in the calibration site. Turn it on by pressing and holding buttons 1, 3 and 4 for 3 seconds.The unit will enter calibration mode. There are three different calibration options available to perform. Select the CO

option and pres button 6 to start calibrating. After about 5 minutes the unit will stop flashing and calibration will be completed.

To abort correction at any time,simply turn the meter off.

CAUTION: The meter is corrected at ambient air of around 400ppm. Do not correct the meter in an environment with an unknown CO

concentration. Doing

this could lead to inaccurate measurements.

CLr - Clears all manually stored data points ALAr - Determines the CO & CO

alarm threshold

unit - Changes the display between

C andoF

rATE - Sets the sampling rate for the datalogger PrES - Pressure compensation for CO

measurement

rtC - Sets the date and time for the unit

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CO2Levels & Guidelines

ASHRAE Standard 62-1989: 1000ppm CO

concentration in occupied building should not

exceed 1000ppm.

Building Bulletin 101 (BB101): 1500ppm UK standards for schools say that CO

averaged over the whole day (i.e. 09:00 - 15:30) should not exceed 1500ppm.

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Troubleshooting

Specification

Can't power on

Press button 1 for more than 0.3 seconds and try again. Check whether batteries are in good contact and correct polarity is observed.

Fixed readings

Check whether data hold function was activated.

Slow response

Check whether the air flow channels on the rear are blocked.

Error messages

E01: CO

sensor damaged E02:The value is under range E03:The value is over range E04:The original data error results in this error E07: Voltage to measure CO

. Replace batteries or use an adaptor E17: Retry CO

calibration

E31:Temperature sensor damaged

Range of 0 - 9999ppm Accuracy ± 30ppm ±5% of reading Response time <30 seconds

Range of 0 - 1000ppm Accuracy: ± 10ppm at <100ppm

± 10% of reading for 101 - 500ppm ± 20% of reading for 501ppm and above

Response time <60 seconds

Temperature

Range of -20 - 60 ºC (-5 - 140 ºF) Accuracy ± 0.6ºC (0.9 ºF) Response time <2 minutes

Warm Up

30 seconds

Operating Ranges

From0~50ºC , 0 ~ 95% RH (avoid condensation)

Storage

From -20 ~ 60 ºC ,0 ~ 99% RH (avoid condensation)

Power

4 pcs AA batteries (rechargeable option),DC Adaptor

Battery Life

> 10 hours (Alkaline)

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OSHA: 5000ppm

Time weighted average over five 8-hour work days should not exceed 5000ppm.

NIOSH recommendations:

250 - 350ppm Normal outdoor ambient concentrations.

600ppm Minimal air quality complaints.

1000ppm Indicates adequate ventilation; complaints such as headaches, fatigue and eye/throat irritation will be more widespread. 1000ppm should be used as an upper limit for indoor levels.

CO Levels & Guidelines

ppm Symptoms and applicable standard

0 - 1 Normal background levels

1600 Nausea within 20 min., death within2-3hrs

Maximum indoor air quality level:

Maximum allowable concentraion per

ASHRAE Residential standards 62-1989 for

living area

Maximum limit 8 hrs of continuous

exposure per California OSHA workplace

standards

Maximum 8 hrs average exposure level per

US OSHA workplace standards

Maximum concentration for continuous

exposure in any 8 hrs average level per

OSHA standards

100

Remove employees from enclosed space if the CO concentration exceeds 100ppm per

OSHA exposure limit

200

Mild headache, fatigue, nausea and

dizziness within2-3hrs

800

Dizziness, nausea, convulsions, death within

2-3hrs

400

Frontal headache,life threatening after 3

hrs. Maximum concentration in flue gas per

the US EPA and AGA standards

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Installation Guide for Log Express

Installation

1. Insert the CD into your computer and wait for the Log Express installation program to start. The following screen will be displayed. Select the first option 'Install Software' and follow the installation instructions.

2. Check the default installation directories as shown in the next image on the right hand side. If you are happy with these, click 'Next'. If you wish to change them, use 'Browse' to select an alternative.

3. Click 'Next' again on the next dialog box and the installation will then begin (see below).

Datalogging software RS232 to USB cable Realtime graph display of CO

and temperature Printable statistics Data can be saved to text file for further analysis Upto 30,000 sample readings Programmable sample interval from 1 second to 5 hours Quickly view the data at a certain date and time with interactive graph

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2 & 3. NEXT

ent

1. CLICK

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4. When it has finished, the above screen will be displayed.Click 'Next' to continue.

5. The driver for the Vent Check Pro will now be installed,click 'Next' to continue.

6. Select the terms of the licence agreement and click 'Next'.

4. NEXT

5. NEXT

6a. NEXT

6. ACCEPT

7. Check the default installation directory. If you are happy with this, click 'Next' on this and the next dialog box.

8. Once installation is complete, the following screen will appear. It is important to click the

checkbox before clicking 'Finish'.

9. Select 'Install' on the pop up screen and then restart the computer when prompted to complete the installation.

If you have any questions regarding the installation process, or about Log Express and the Vent Check Pro,please feel free to contact Duomo (UK) Ltd.

7. NEXT

8a. FINISH

8. SELECT

9. INSTALL

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Log Express

Connecting

Homescreen

In order to download the data from the Vent Check Pro or use it as a real time datalogger you must first have fully installed Log Express and the associated drivers from the installation CD.

Use the 'Log Express Installation' datasheet if you need instructions on how to do this.

NOTE: Make sure that you have the Vent Check Pro connected to the computer via the USB cable before launching the program.

Upon launching the program, Log Express will automatically connect to the Vent Check Pro. If you do not have it already connected you will see an error message. If this happens, connect the device with the USB cable and select 'AutoConnect' from the 'Communication' menu or the 'LogInfo' button.

Once you have established a connection you can then choose to download existing data or begin datalogging.

Datalogging software RS232 to USB cable Realtime graph display of CO

File

From this menu you can load a previously saved set of results, save a set of results, print the current view and exit the program.

Setting

The setting menu gives access to the 'Logger'. Here it is possible to synchronise the time between the Vent Check Pro and the computer and also give the Vent Check Pro a unique identifier.This is particularly useful if you have several devices and want to keep track of each one and the records it takes.

Communication

To connect to the Vent Check Pro if it has not already done so automatically, select the 'AutoConnect' option at the top of this menu. If you are experiencing any difficulties with connections, you can select an alternative COM port from the 'COMPort' sub menu.

View

The view menu allows you to zoom in on a particular point of the graph. With the 'Zoom in' tool selected, press and hold down the CTRL key and left click to zoom in on the graph. Doing the same with the right mouse button will zoom out.

The image on the next page shows the layout of Log Express. The menu bar at the top contains the following options;

ent

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Layout

'Zoom window' lets you zoom out of the current view using the CTRL k ey and the right mouse button.

The 'Zoom Xaxis' and 'Zoom Yaxis' functions allow you to rescale either access by the same method.

LogInfo

The 'LogInfo' button establishes a connection between the device and the computer, similar to selecting 'AutoConnect'.

Download

Press the download button to transfer all data from the Vent Check Pro to Log Express.

Redraw

Clears the current view of the graph and resets it.

Clear

The 'Clear' button resets Log Express and clears out any currently stored data.

Cursor

Turning the cursor on allows you to interrogate any data point on the graph by clicking it. Doing so will display the data point number, data value, d ate and

time for that particular parameter. See image on the next page.

Record No./ Time Bar

Switching between Record No. and Time displays alters the X-axis of the graph as shown on the next page.

Display Selectors

Toggle the temperature, CO

and CO readings on and off. on the graph. Clicking each checkbox will alter the display on the graph by showing or hiding the relevant readings.

Data Points

The table at the bottom of the screen displays each individual data point taken in chronological order. The date and time are shown, along with the readings for the air temperature, carbon monoxide and carbon dioxide.

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The image below shows the use of the 'Cursor' function. The highlighted yellow data point shows the value of air temperature at that particular date and time.

This image shows the x axis represented in time rather than data points.