HTA 77596 Manuale utente

OPERATION MANUAL

PORTABLE IAQ METER

Model:

77597, 4 in 1

77596, 3 in 1

INTRODUCTION

Thank you for purchasing this portable

IAQ meter. The meter measures CO

level,CO level, air temp., dew point, wet

bulb temp. and humidity(DP, WB, RH are

for models 77597 only) and is an ideal

instrument for indoor air quality (IAQ)

diagnosis.

Poor indoor air quality is considered

unhealthy because it causes tiredness,

loss of ability to concentrate, and even

illness(ex. Sick Building Syndrome). IAQ

monitoring and survey, especially on CO

level and air ventilation become widely

applied in public areas such as offices,

classrooms, factories, hospitals and

hotels. It is also suggested in regulations

of industrial hygiene in some countries.

(Appendix)

The portable CO meter uses NDIR (non-

dispersive infrared) technology to ensure

the reliability and long term stability. It’s

useful in verifying HVAC system perform-

ance and air ventilation control.

CO is a colorless, odorless, and tasteless

gas which is slightly lighter than air. It is

highly toxic to humans and animals.

Maximum indoor air quality level per

ASHRAE Residential standards 62-1989

for living area is under 9ppm. Besides, it is

also necessary to remove employees from

enclosed space if the CO concentration

exceeds100ppm per OSHA exposure limit.

Please refer to Appendix for the details.

Features:

Big LCD display with blue backlight

to use in dark area

One touch to display CO2/Dew point

temperature/Wet bulb temperature/

Air temperature/Humidity/CO in turns.

Designed with NDIR (non-dispersive

infrared) Waveguide technology CO2

sensor

Programmable warning CO level

Long time drift compensation on CO2

sensor

Audible alarm (~80db)threshold setting

Max, Min, TWA, STEL functions included

Mini USB to PC download function for

analysis

99 points manually recording

32000/24000 points auto recording

Review 99 points manual record

Hold function freezes current readings

Housing design surrounds with rails to

help Air ventilation for quick & accurate

response

Easy to manually calibrate CO2 at

fresh air around 380-420ppm

MATERIAL SUPPLIED

Meter

4pcs AA batteries

Mini USB cable and software CD

Operation manual

Hard carrying case

This package contains:

Optional accessory:

33% calibration salt (VZ0033AZ1)

75% calibration salt (VZ0075AZ1)

Adaptor (9V/100~240Vac)

POWER SUPPLY

The meter is powered by either 4 AA

batteries or a DC adaptor(9V/1A output).

Install the batteries into the battery

compartment on the rear and make sure

they are in correct polarity and good

contact.

will

appear on the LCD .

atter

When an adaptor is used, it will

cut off the power supply from batteries.

The adaptor can’t be used as a battery

charger.

When battery voltage gets low,

(Fig.1)

The CO sensor can’t work normally

under low voltage, please replace with

fresh b ies or connect with an

adaptor.

CO2

PM B

Fig.1

HOLDHOLD

CO2

%rhrh

TADPWBT

REC

Recall

CAL

MINMIN

MAXMAX

AVGAVG

LCD DISPLAY

UpperLCD

MIN/MAX Minimum/Maximun readings

STEL Short-term exposure limit (15

minutes weighted average)

TWA Time weighted average(8 hours)

Low battery indicator

DP Dew point

TA Air temperature

WBT Wet bulb

%rh Unit of relative humidity (77597)

oC/ F Celsius/Fahrenheit of temp.

CAL In calibration status

REC In manual/automatic logging

RECALL In manual records recall mode

CO2/CO/Temp....reading

LowerLCD Real time display

CO2Carbon dioxide reading

CO Carbon monoxide reading

HOLD Readings are freezed unchanged

temperature(77597)

Symbols

Turns on and off the meter.

Enters setup mode while meter is off.

Sets as non-sleep mode with .

SET

START

ESC Exits setup/recall page.

Start automatic logging.

KEYPAD

ON/OFF

MODE

RECALL

HOLD

Press to switch displayed mode.

Long press to enter memory recall mode.

TWATWA

STELSTEL

Freezes the current readings.

Selects unit or increases value in setup.

Cancels data hold function.

Press to manually record the reading.

Selects unit or decreases value in setup.

Activates MIN, MAX, TWA, STEL

function. Saves and finishes settings.

OPERATION

Press to turn the meter on and off.

At power up, it emits a short beep and

performs 30 seconds countdown(Fig.2)

for meter warm up, then enters normal

mode with current CO and real time

displayed (Fig.3). The real time display

date and time in turns.

Suggest to wait for 30 seconds warm up

time. For quick start, you may press

for 2 seconds to end the warm up

and entering normal display.

POWER ON/OFF

SET

ON/OFF

Fig.2 Fig.3

CO2

TAKING MEASUREMENT

The meter starts measurement when

power on and update readings every

second. In the condition of operating

environment change (ex. from high to

low temp.), it takes 30 sec to respond

for CO sensor and 30 minutes for RH.

NOTE: Do not hold the meter close to

faces in case exhalation affects CO

levels.

M /AVG

HOLD

MEM

M /AVG

Press to switch to temperatures

display.(Fig.6). In 77597 model, dew

point temp. and wet bulb temp. are also

available.(Fig.7). The lower display

shows the real time clock.

AIR(all models),DP,WBT(77597)

Press to switch the mode to CO2.

User can get the CO2 reading in ppm

unit on main display.(Fig.4). The lower

display shows the real time clock.

CO2 (Carbon Dioxide)

MODE

RECALL

CO2

Fig.4

Press to switch the mode to CO.

User can get the CO reading in ppm

unit on main display.(Fig.5). The lower

display shows the real time clock.

CO (Carbon Monoxide)

MODE

RECALL

Fig.5

MODE

RECALL

WBT

Fig.6 Fig.7

Press to switch to humidity display.

(Fig.8).The lower display shows the real

time clock.

Humidity (77597)

MODE

RECALL

%rhrh

Fig.8

DATA HOLD

In normal display mode, press to

freeze the readings, "HOLD” icon is

flashed on the left top of LCD(Fig.9). All

current readings are kept unchanged.

Press again to cancel the hold

function.

Fig.9

BACKLIGHT

The backlight will be activated for 10

seconds by pressing any key.

MIN,MAX,STEL,TWA, CURRENT REVIEW

This meter allows you to check the

minimun, maximun, STEL,TWA and

current value from the moment you press

the key. Under normal mode, press

to see the minimum, maximum,

STEL, TWA and current value in turns.

Each press of ,it displays MIN, MAX,

STEL,TWA, current value in sequence.

(Fig.10~12). To return to normal mode,

press key to escape(Fig.13)

If the meter is turned on for shorter than

15 mins, the STEL value will be the

weighted average of readings take since

power on. Same for TWA values appear

before 8 hours.

It takes at least 5 mins to calculate STEL

and TWA. The display shows “----” during

the first 5 mins from power on.

HOLD

HOLDHOLD

%rhrh

NOTE:

THE HOLD FUNCTION IS DISABLE IN MIN/MAX/

AVG MODE.

M /AVG

START

ESC

In this max/min/STEL/TWA/current

modes, it shows the corresponding

readings on main display and the

accumulated time of how long you are

in this mode.(Fig10~12).

NOTE:

“HOLD” & “MANUALLY

RECORD” & “RECALL”

FUNCTION ARE DISABLE

IN MIN/MAX/AVG MODE.

MODE

RECALL

MAXMAX

Fig.14

START

ESC

While in “HOLD” mode, STEL and TWA

will remain updating every 5 mins.

CO2

MINMIN

CO2

CO2CO2

Fig.10 Fig.11

Fig.12 Fig.13

TWATWA

In this mode, press to switch the

displayed parameters. Fig 14.

The dispalyed sequence in this mode is

min max STEL TWA current min

max.....Press key can immediately

leave this mode and return to normal.

Distinguishing the normal display and

current review by checking the time

display format. In normal display, the

date & time displayed in turns. In current

review, the time display is the accumu-

lated time of how long you are in

max/min mode.

NOTE:

TWA &STEL ARE FOR CO2

ONLY.

MIN/MAX ARE FOR ALL

PARAMETERS.

parameter you choose to see on main

display. TA

REC AM

Fig.15

If the reading changes

quickly, you can press

to freeze the

reading before

manually recording

the data.

HOLD

99 MEMORIES RECALL

The meter features 99 point memories

review function.

In normal or hold mode, press key

for more than 2 seconds until the

icon flashes.

Press or to scroll the memories.

The memory serial number displays on

main LCD fist and reading comes after.

(Fig.16&17)

MODE

RECALL

Recall

CO2

Recall

HOLD MEM

Fig.16 Fig.17

MANUALLY RECORDING

The meter features 99 point memories.

In normal or hold mode, Press key

to record, icon and main display

flash for about 3 seconds. The main

display shows the memory serial number

, at most 99 points.(Fig. 15)

Each memory contains all parameters

(CO2, CO, TA.....%rh), not only the

MEM

REC

The manually recording function is

disabled in min/max mode.

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