Major tech MT91 Manual de usuario

MT91

MINI HYGROMETER

INSTRUCTION MANUAL

2. Features

1. Range: 0.0 ~ 100.0%RH, -20.0°C ~ 60.0°C (-4.0°F ~ 140.0°F);

2. Range Resolution: 0.1%RH, 0.1°C/0.1°F

3. Dual Display Temperature & Humidity.

4. Bluetooth 4.0

5. MAX/MIN

6. HOLD lock and backlight

7. Measurable Dry bulb temperature, Wet bulb temperature, Dew point Temperature

8. Temperature unit switch

9. Auto power off, Disable auto-power off.

1. Meter Description

1- Temperature/Humidity Sensor

2- LCD Display

3- Data Hold/Backlight button

4- MAX/MIN button

5- Power on/off button

6- Temperature button

7- Bluetooth button

3. Speciﬁcations

Function Range Resolution Accuracy

Humidity 0 - 100%RH 0.1%RH ±3.5%RH (20 - 80%)

±5%RH (0 - 20&80 - 100%)

Dry bulb temperature -20 - 60°C 0.1 °C/°F ±0.5°C/0.9°F (0 - 40°C)

-4 - 140°F ±1°C/1 .8°F (-20 - 0&40 - 60 °C)

Wet bulb temperature 0 - 60°C 0.1 °C/°F ±0.5°C/0.9°F (0 - 40 °C)

32 -140°F ±1°C/1 .8°F (40 - 60 °C)

Dew point temperature -20.0 - 60°C 0.1 °C/°F ±0.5°C/0.9°F (0 40 °C)

-4 - 140°F ±1°C/1.8°F (-20 - 0&40 - 60°C)

Display

Sensor Type

Low battery indication

Dual digital LCD display with backlight

Humidity: Accurate capacitance sensor

Temperature: Thermistor

The low battery signal “ ” ﬂash when battery voltage

drops below 7 .2V; The backlight and low battery signal

“” ﬂash twice when battery voltage drops below 6.5V, then

auto power off.

Operating condition

Storage condition

Power

Dimension

Weight.

0 50°C(32 122°F) < 80%RH non-condensing

~ ~

-20 60°C(-4 140°F) <80%RH non-condensing

~ ~

1 x 9V battery.

204 (L) X 54 (W) X 36 (H) mm

172g

4. Operation instructions

Power on:

Press button to power on, system default auto power off. Hold down the button to power on

and disable auto power off function. Hold Down the button again to enable the auto power off

function

Power off:

Press button to power off.

Auto-power off:

If the meter is not active for 10 minutes, it will Auto-power off. The auto-power off sign " "

displays in the left corner of the LCD. If the button is held down for over 1 minute, it will be

recognised as a faulty operation and the instrument will auto power off.

Temperature:

Press to switch the measure temperature type: NULL (dry bulb temperature) WB (wet bulb

temperature) DP (Dew point temperature) NULL (dry bulb temperature), cycle in this

order. Default measure dry bulb temperature; hold down the temperature button to switch

temperature unit, and cycle in turn °C °F °C , default unit is the last unit before power

oﬀ.

Free software for Bluetooth application:

Download Meterbox Pro on iOS and Android devices and select Environmental Meter

Bluetooth:

Hold down to enable/disable the Bluetooth communication function

MAX/MIN:

Press MAX/MIN button and "MAX" appears on the display. The LCD is now displaying the

maximum reading of the selected parameter. The display reading will not change until a higher

reading is registered. Press the MIN/MAX button and "MIN" appears on the display. The LCD is

now displaying the minimum reading of the selected parameter. The display reading will not

change until a lower reading is registered. Press the MIN/MAX button to exit the mode.

Cycle in order: NULL MAX MIN NULL.

HOLD/Backlight:

Press Hold/backlight Button to enter hold function, the LCD displays "HOLD". On hold mode,

only the power button and Hold/backlight button is enabled. Press the button again to disable

the hold function (Hold is no longer on LCD). Hold down the button to enable/disable the

backlight. (Note: button 2, 3, 4, 5 can be enabled only when the instrument is powered on.)

Maintenance:

The instrument should be cleaned with a damp cloth and non-corrosive cleanser when

necessary. The instrument must be kept at a proper temperature and humidity environment. If

the instrument will not be used for an extended period of time, please remove the battery.

Battery Replacement:

If the low battery signal appears on the LCD display, it indicates that the battery should be

replaced. Open the battery cover with screwdriver, then replace the used battery with a new

battery.

www.major-tech.com www.majortech.com.au

[email protected] [email protected]

MAJOR TECH (PTY) LTD

South Africa Australia

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