LFF LAQ961 Monitor Carbon Dioxide Tester User Manual

: June 16, 2024
: LFF

Table of Contents

LFF LAQ961 Monitor Carbon Dioxide Tester
PACKAGE LIST
INTRODUCTION
OVERVIEW
MAIN FEATURES
FIRST TIME TO USE
SWITCH ON/OFF THE MONITOR
OPERATION
ALARM
CO2 DISPLAY
ADJUST DISPLAY BACKLIGH BRIGHTNESS
BATTERY INDICATION AND BATTERY CHARGING
RESET THE CO2 MONITOR
PRECAUTIONS
SPECIFICATION
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LFF LAQ961 Monitor Carbon Dioxide Tester

Ref.: LAQ961

PACKAGE LIST

LFF-LAQ961-Monitor-Carbon-Dioxide-Tester-fig-1

INTRODUCTION

Thank you for selecting the LFF LAQ961. The Carbon Dioxide (CO2) monitor is designed for air quality control and health control by measuring Carbon Dioxide level in areas where CO2 could be concern. The measured CO2 value in ppm (parts-per-million.)
Temperature, Humidity and Time will be displayed on the LCD along with three CO2 status indications: Normal (400 to 800ppm), Warning (801 to1600ppm), Dangerous (>1600ppm). An acoustic alarm sounds when the CO2 level exceeds a defined level. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.

OVERVIEW

LFF-LAQ961-Monitor-Carbon-Dioxide-Tester-fig-2

▲/ LIGHT button
SET button
▼/CO2 AL /CAL button
CO2 status LED indicator
Tempertaure and humidity reading
comfort status symbol
Carbon dioxide value
Low battery indicator
Time display
Alarm indicator
ON/OFF button
Input power port
Reset button

MAIN FEATURES

Large true black display with color.
Non-dispersive infrared (NDIR) gas sensor for CO2 detection.
Wide CO2 measuring range from 400 to 5000ppm with 3 colors status indications.
Real time clock.
Alarm clock with snooze function.
Color display of ventilation recommendation on basis of CO2 concentration in the air.
Adjustable CO2 high and low value alert with optional alarm sound for high value alert.
CO2 Auto-Calibration and Manual Calibration.
Backlight with adjustable brightness levels.
Built-in memory chip to save setting when power is off.
3 x Touch Buttons Operation & 1 key for on/off.

FIRST TIME TO USE

Unpack and take out the CO2 monitor. Insert the USB-C cable to the monitor and connect to the USB adaptor.
Press and hold the 11 [ON/OFF] button over 3 seconds to turn on the CO2 monitor.
Time, temperature, humidity and CO2 readings will show on the display. The CO2 sensor starts to warm up. CO2 reading shows “550” initially. In around 60 seconds, a relevant CO2 data will be displayed.

SWITCH ON/OFF THE MONITOR

When the monitor is in OFF status, press and hold 11 [ON/OFF] button over 3 seconds to turn ON the monitor.
Time, temperature, humidity and CO2 readings will show on the display. The CO2 sensor starts to warm up. CO2 reading shows “550” initially. In around 60 seconds, a relevant CO2 data will be displayed.
When the monitor is in ON status, press and hold 11 [ON/OFF] button over 3 seconds to turn OFF the monitor.

OPERATION

1 TIME SETTING

In Normal time mode, press and hold 2 [SET] button over 3 seconds to enter time setting mode.
Press 1 [▲/ LIGHT] and [▼/CO2 AL /CAL] button to adjust the values.
Press and hold 1 [▲/ LIGHT] and [▼/CO2 AL /CAL] button over 3 seconds to adjust the values quickly.
Press and release [SET] button to confirm and move to next item.

SETTING ORDER

12/24 Hour Format
Hour
Minute
℃/℉ format
Low CO2 Alert level
High CO2 Alert level

LFF-LAQ961-Monitor-Carbon-Dioxide-Tester-fig-9

LFF-LAQ961-Monitor-Carbon-Dioxide-Tester-fig-10

ALARM

CHECK ALRAM TIME
In Normal time display, press and release 2[SET] button to switch display alarm time (Alarm Time mode).

SETTING THE DAILY ALARM
In Alarm time setting mode, press and release 2 [SET] button to confirm and move to the next item.
• press and hold 2 [SET] button over 3 seconds to enter alarm setting mode.
Hour of Alarm starts to flash.

Press 1 [▲/ LIGHT] and 3 [▼/CO2 AL /CAL] button to set required alarm hours.
Press and hold 1 [▲/ LIGHT] and 3 [▼/CO2 AL /CAL] button to adjust alarm hours quickly.
Press [SET] button to select minute of Alarm.
When minute of Alarm flashes,

Press 1 [▲/ LIGHT] and 3 [▼/CO2 AL /CAL] button to set required alarm minutes.
Press and hold 1 [▲/ LIGHT] and 3 [▼/CO2 AL /CAL] button to adjust alarm minutes quickly.
Press [SET] to save all setting and exit to Normal time mode.
Note : If there is no valid operation within 10 seconds, it will automatically return to the Normal display mode from the setting mode.

DEACTIVATE/ ACTIVATE ALARM FUNCTION

In Alarm time mode display, press and release 3 [▼/CO2 AL /CAL] button to select the Alarm on or off.
If the alarm is on, its corresponding alarm icon will be shown on the display.

LFF-LAQ961-Monitor-Carbon-Dioxide-Tester-fig-19

Note : When the alarm is set ON, the alarm function will be normal when the monitor is OFF mode.

SWITCHING OFF THE ALARM SIGNAL

When the alarm time reaches, alarm is ringing and alarm icon is flashing, press any key except 2 [SET] to stop the alarm signal. It is not necessary to reactivate the alarm. It will ring again this time next day.

SNOOZE FUNCTION

When the alarm time reaches, alarm is ringing and alarm icon is flashing, press [SET] button to pause the alarm. The snooze indicator icon keep flashing.
The alarm will resume after 5 minutes.

CO2 DISPLAY

CO2 STATUS INDICATION

There are 3 stages indication: Normal, Warning and Dangerous.

LFF-LAQ961-Monitor-Carbon-Dioxide-Tester-fig-21

CO2 LOW and HIGH ALERT

• When the measured CO2 reaches the set high/low alert level, the related and its measured CO2 will be flashing to remind you.

TO USE ACOUSTIC CO2 ALARM (FOR HIGH ALERT)

Press 3 [▼/CO2 AL /CAL] button to turn on the CO2 alarm. When the alarm is on, the CO2 sound alarm icon appears on the display.
When the measured CO2 reaches the set high alert level, the measured CO2, and CO2 sound alarm icon flash and an audible beep sound will be given continuously.
The beep sound will accelerate when the measured CO2 level exceeds more over the set alert level.
If this happens, please open the windows, adjust the air ventilation and avoid too many people gathering together to improve the air quality of your environment.
Press 3 [▼/CO2 AL /CAL] button to disable the CO2 sound alarm. The measured CO2 and remain flashing if CO2 exceeds the set high alert.

TO CALIBRATE THE CO2 SENSOR

AUTOMATIC BASELINE CALIBRATION

The monitor is establishes a baseline calibration to eliminate the zero drift of the infrared sensor. The Automatic Baseline Calibration function is always “ON” when the monitor is turned on. The Automatic Baseline Calibration is designed to calibrate the monitor at the minimum CO2 reading detected during 7 days of continuous monitoring (power on). It assumes that the area being tested receives fresh air with a CO2 level of approximately 400ppm at some period of time during seven days. It is not suitable to use a desktop CO2 monitor in closed area with consistently high CO2 levels, 24 hours a day.

MANUAL CALIBRATION OF THE CO2 SENSOR

Place the CO2 monitor in a 400ppm calibration surrounding. Turn the CO2
monitor on and wait until the first CO2 reading displayed.
Press and hold 11 [ON/OFF] and 3 [▼/CO2 AL /CAL] buttons together over 3 seconds to enter CO2 Manual Calibration mode.
When “CAL SET” appears and flashes, press 2 [SET] to confirm CO2 manual calibration operation. Press other buttons except 2 [SET] to exit CO2 manual calibration operation.
The calibration time is around 15 minutes, the calibration time is counting down on the display. After count down is finished, the initial calibration is completed. The CO2 monitor will return to the normal display mode and will continue the calibration in the background. It takes 24 hours to let your monitor run and display the correct CO2 level.
Note: Please wait for your CO2 monitor to complete the calibration process by itself. DO NOT press any buttons during the calibration process.

ADJUST DISPLAY BACKLIGH BRIGHTNESS

Press 1 [▲/ LIGHT] button to adjust the brightness of the display from low to high.

BATTERY INDICATION AND BATTERY CHARGING

The monitor will show its battery level indication.
When the battery level is low (display empty battery level), please charge the CO2 monitor by connection it with USB cable and power supply.
During the charging, the battery indication display is scrolling representing battery is under charging.
When the charging is completed, the battery indication will be stop scrolling and changed to solid (full battery level).

RESET THE CO2 MONITOR

If there is malfunction, press 13 [RESET] button to reset the monitor.

CARE AND MAINTENANCE

Place the CO2 monitor on a stable surface, away from the sources of direct sunlight or excessive heat or moisture.
Clean the CO2 monitor with a soft cloth moistened only with mild soap and water. Stronger agents such as Benzine, thinner or similar materials can damage the surface of the item. Make sure the CO2 monitor is unplugged before cleaning.
Do not open the back case or tamper with any components of this monitor.
Do not plug in any other AC/AC or AC/DC adaptor with incorrect specifications or voltage.

PRECAUTIONS

The item is intended to be used only indoors.
Do not subject the item to excessive force or shock.
Do not expose the item to extreme temperatures, direct sunlight, dust or humidity.
Do not immerse in water.
Avoid contact with any corrosive materials.
Do not dispose this item in a fire as it may explode.
Do not open the inner back case or tamper with any components of this item.