Major tech MT941 Bedienungsanleitung

MT941

Professional Multifunction

Enviroment Meter

1. Introduction …………………………………………………………………… 4

2. Features ………………………………………………………………………… 4

3. General Specifications …………………………………………………….. 5

4. Manometer Specification ….………………………..………………….… 5

5. Button Specifications …………………………………………………….… 6

6. Display Icon Description ………………………………………………….. 7

7. Changing Setup Options ……………………………………………….…. 8

7.1. Setup Options …………………………….……….............……. 8

7.2. Entering or exiting Setup …........…………………………….. 8

7.3. Changing a Setup Option …........…………………………….. 8

7.4. Temperature Unit …………........……………………….…….... 8

7.5. Light Unit ……………………........……………..……….……….. 9

7.6. Sound Unit ……………………........……………….....…………. 9

7.7. Offset ……………………………........…...........………..………. 9

7.8. Velocity Unit ……………….….........……………………….……. 10

7.9. Flow Unit …………………………........……..………….…….….. 10

7.10. Area Unit ………………………........……………….….……….. 11

7.11. Area Size ………………………........………….…….….….…… 11

7.12. Auto Power Off Mode ……………........………….……..…… 12

7.13. Measuring RH% &Temperature ……........…………….…. 12

7.14. Measuring K-Type Temperature ……….........….…………. 13

7.15. Measuring Sound ……………….…………........…………..... 13

7.16. Measuring Light ………………………………........…………… 13

7.17. Measuring Air Velocity & Air Flow ………........………….. 13

7.18. Holding the Displayed Reading ……………........………… 14

7.19. Viewing the MIN, MAX, and AVG Reading ….........…… 14

8. Replacing the Batteries ……………………………………………….…… 14

Contents Page

1. Introduction

ŸThe 5 in 1 digital Multifunction Environment Meter has been

designed to combine the functions of a Sound Level Meter, Light

Meter, Humidity Meter, Temperature Meter and CFM/CMM Thermo-

Anemometer. It is an ideal Multifunction Environment Meter with

scores of practical applications for professional and home use.

ŸThe Sound level function can be used to measure noise in factories,

schools, offices, home, etc, checking acoustics of studios,

auditoriums and hi-fi installations.

ŸThe Light function is used to measure luminance in the field. It is

fully cosine corrected for the angular incidence of light. The light

sensitive component used in the meter is a very stable, long life,

silicon diode.

ŸThe Humidity/Temperature uses a humidity/semiconductor sensor

and K-type thermocouple.

ŸCFM/CMM Thermo-Anemometer is suitable for use in a wide variety

of applications, including plant maintenance operations,

environmental analysis, fume hood testing, and HVAC system

assessments.

2. Features

Congratulations on your purchase of the MT941 Professional Multifunction

Enviroment Meter

ŸLarge LCD display with backlight.

ŸMAX, MIN and AVG measurements.

ŸDisplay shows Sound, Light, K-Type Temperature, Humidity &

Temperature as well as Air Velocity & Air Flow simultaneously.

ŸElectronic Offset function allows compensation of thermocouple

errors to maximize overall accuracy.

ŸThe device measures air velocity, it features 5 selectable units of

velocity measure: m/s, ft/min, km/h, MPH, knots, and it features 2

selectable units of flow measure: CFM, CMM.

ŸEasy to set Area dimension (up to 6 points) for air flow

measurement.

ŸUSB interface, USB to UART Bridge Controller.

ŸLow battery indication, Auto Power Off (Sleep mode) adjustable.

Operating Conditions

Storage Conditions

Power Supply

Low Battery Indicator

Accessories

0 to 50 °C

-10 to 60 °C

1 x 9V Battery

Yes

9V Battery and K-Type temperature, humidity probe,

light probe, sound probe, anemo probe and carrying

case.

3. General Speciﬁcations

Function Range Resolution

Accuracy

Sound Level

Light

Humidity and

Temperature

K type

Temperature

Air Velocity

Air Flow

30dB-130dB

20000Lux

5%-98%RH

10~30°C

(50~86°F)

-30~9.99°C

(-22~50°F)

31~60°C

(88~140°F)

-99.9~99.9°C

(-148~212°F)

-100~-200°C

(-148~-328°F)

100~1372°C

(212~2502°F)

(0.40~30)m/s

(196~5900)ft/min

(3.6~108.0)km/h

(2.2~67.0)MPH

(1.9~58.0)Knots

(0~999900)CFM

(0~999900)CMM

0.1

0.1,1,10

0.1

0.01

0.1

0.001~100

0.1,1

±3.5dB at 94dB Sound level 1KHz sine wave

±(5+10d)

±3.5%RH

±1°C/±1.8°F

±3%±0.20m/s

±3%±40 ft/min

±3%±0.8 km/h

±3%±0.4 MPH

±3%±0.4 Knots

accuracy is function of velocity and area

±2°C /±3.6°F

± [1.5%rdg +2°C(3.6°F)]

± [1.5%rdg + 1°C (1.8°F)]

4. Manometer Speciﬁcation

1. Press the button to turn the meter ON/OFF.

2. Press the button to step through the maximum, minimum, and

average readings. To exit the MAN/MIX/AVG mode, press the button

for 2 seconds to return to normal operation.

3. Press the button to switch between the temperature (humidity

Probe) and the K-Type temperature settings in the primary.

4. Press the button to freeze or unfreeze the displayed readings. The

meter is in area setup option, press the button to change the station

of flashing digit.

5. Press the button to switch between the Light, Sound, Air Flow and

Humidity settings in the secondary display.

6. Press the button to turn on the backlight. Press it again to turn

off the backlight. Press the button for 2 seconds to start or exit

Setup. (See "Changing Setup Options.")

7. When secondary readings show the Sound, press the button to

switch between FAST and SLOW mode. When secondary readings show

the Light, press the button for 2 seconds to zero the Light. When the

meter is in Setup mode, press the button to enter a setup option and

press the button again to store the displayed setting in memory.

8. Press the button to change the units of the primary display. In Setup

mode, press the button to scroll to the Setup option you want to

change or press the button to increase the displayed setting.

9. Press the button to change the units of the secondary display. In

Setup mode, press the button to scroll to the Setup option you want

to change or press the button to decrease the displayed setting.

5. Button Speciﬁcations

HOLD

1. Temperature (Humidity Probe), K-Type Temperature and Air Velocity

modes are active in primary display

2. Area Indication

3. Light, Sound, Air Flow and Humidity Modes are active in Secondary

Display

4. The Secondary Display

5. Sound of Fast or Slow Mode

6. Data Hold Indicator

7. REC, MAX, MIN and AVG Indicators.

8. Units of Sound (dBA/ dBC) in Secondary Display

9. Units of Light (LUX/ FC) in Secondary Display

10. K-Type Temperature Offset Option, OFFSET Display.

11. Entering or Exiting Setup Mode

12. Multiplier (x 10 orx 100)

13. Units of Flow (CFM/CMM) in Secondary Display

14. Units of Humidity in Secondary Display

15. The Indication of Meter Communicating to PC

16. Units of Area

17. Units of velocity

18. Multiplier (x10)

19. Units of Temperature

20. Low Battery Indicator

21. Auto Power OFF Mode Indicators

22. The Primary Display

6. Display icons Description

Use Setup to choose Temperature, Light, Sound, Air Velocity, Air Flow,

Area, K-Type offset and sleep mode setting. The meter stores the settings

in its memory.

Function

Temperature Unit

Function Function

TEMP Unit Set Temperature Unit (°C or °F)

Light Unit LIGHT Unit Set Light Unit (LUX or FC)

Sound Unit SOUND Unit Set Sound Unit (dBA or dBC)

Offset K-Type OFFSET K-type Temperature offset

Units of velocity VEL Unit Set Velocity Unit(five unit)

Units of Flow FLOW Unit Set Flow Unit (CFM or CMM)

Units of Area AREA Unit Set Area Of Unit (in² or cm² or ft²)

Size of Area AREA Size Set Area Of Measuring Air Flow

Sleep Mode SLP Yes or No

7.2. Entering or Exiting Setup

7. Changing Setup Options

7.1. Setup Options

When the meter is in Setup mode, the display shows SETUP

Press the button for 2 seconds to start or exit Setup.

7.3. Changing a Setup Option

7.4. Temperature Unit

To change the temperature unit, enter TEMP Unit setup

operation. Press the or button until the display show °C or °F.

Press the button, to store the new setting in the memory.

1. Press the or button to scroll to the setup option you want to

change.

2. Press the button to change the setting.

3. Press the or button until the setting you want to use appears on

the display. Press to store the new setting in the memory.

Note: Setup is disabled in MIN MAX/AVG mode.

To change the Light unit, enter LIGHT Unit setup operation.

Press the or button until the display shows LUX or FC,

Press the button, to store the new setting in the memory.

7.5. Light Unit

To change the sound unit, enter SOUND Unit setup operation.

Press the or button until the display shows dBA or dBC.

Press the button, to store the new setting in the memory.

7.6. Sound Unit

The secondary display shows the temperature and the offset.

The primary display shows the offset. You can store individual offsets for

K-Type temperature. Press the or button to increase or decrease offsets.

Press the button, to store the new setting in the memory.

7.7. Offset

To change the velocity unit, enter VELOCITY Unit setup operation.

Press the or button until the display shows the unit you want to change.

Press the button, to store the new setting in the memory.

7.8. Velocity Unit

To change the flow unit, enter the FLOW Unit setup operation.

Press the or button until the display shows CFM or CMM.

Press the button, to store the new setting in the memory.

7.9. Flow Unit

Note: ● m/s — meters per second ● km/h — kilometers per hour

● ft/min — feet per minute ● MPH — miles per hour

● knots — nautical miles per hour

Note: ● CFM (ft3/min) = Air Velocity(ft/min) x Area(ft2)

● CMM (m3/min) = Air Velocity(m/s) x Area(m2) x 60

● CFM: cubic feet per minute

● CMM: cubic meters per minute

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