Tenmars TM-741 Bedienungsanleitung

Air Velocity Meter

TM-741

TM-740

User’s manual

HB2TM7410000

Contents

1. Description....................................... 4

2. Safety Precaution............................ 4

3. features............................................ 5

4. Specifications .................................. 5

5. Accessories : ................................... 6

6. Air Velocity Measures...................... 7

7. Operation......................................... 8

7.1Velocity Unit Button: ................................ 8

7.2CAL / ℃/℉Button:................................. 8

7.3℃/℉Button :.......................................... 8

7.4MAX/MIN/AVG Button : ........................... 8

7.5Data Hold button:..................................... 9

7.6Power Button:.......................................... 9

7.7Auto Power:............................................. 9

7.8Enable/disable auto power off................. 9

8. Instrument Description................... 10

9. Battery Replacement......................11

10. End of life...................................11

TM-741/TM-740

1. DESCRIPTION

The meter measures air speed and temperature.

It is ideal for spot measurements.

at air outlets on account of its 30mm vane. In

addition to air speed and temperature.

2. SAFETY PRECAUTION

CAUTION

Be extremely careful for the following

conditions while measuring.

Do not operate the meter under the

environment with explosive gas (material),

combustible gas (material) steam or filled with

dust.

In order to avoid reading incorrect data, please

replace the battery immediately when the

symbol " " appears on the LCD.

In order to avoid the damage caused by

contamination or static electricity, do not touch

the circuit board before you take any adequate

action.

Operating Environment : Indoors use. This

instrument has been designed for being used

in an environment of pollution degree 2.

Operation Altitude : Up to 2000M.

EMC : EN61326-1(2006), IEC 61000-4-2(2008,

IEC 61000-4-3(2006) + (2007).

TM-741/TM-740

3. FEATURES

30mm 6 plastics vane.

Light air response 0.4m/s.

Max/Min/Avg and data hold.

Auto power off with disable function.

4. SPECIFICATIONS

General Specifications

Display : Dual LCD display. The maximum

value on the primary display is 9999. The

maximum value on secondary display is 999.

Low Battery Indicator : When the LCD displays

" " symbol, please replace the battery.

Sampling Rate : 1 sample per second.

Power Supply : 2 batteries 1.5V AAA MN2400

LR03 AM4.

Battery Life : 50 hours during consecutive use.

Dimensions : 135 × 48 × 23 mm (L × W × H).

Weight : 80g (excluding the battery).

Operating Temperature and Humidity :

5°C ~ +50°C, <95% RH.

Storage Temperature and Humidity :

-10 to 60°C, <70% RH.

TM-741/TM-740

Electrical Specification:

Velocity:

Unit Range Resolution Accuracy

m/s 0.4~25 0.1 ±2﹪+0.2

Km/hr(kph) 1.5~90 0.1 ±2﹪+0.8

mph 0.9~55 0.1 ±2﹪+0.4

Knots(kts) 0.8~48 0.1 ±2﹪+0.4

ft/min(fpm) 79~4921 1±2﹪+40

Temperature:

Unit Range Resolution Accuracy

℃

-20~50 0.1

±1

℃

℉

-4~122 0.1

±1.8

℉

5. ACCESSORIES :

User manual.

1.5V battery (AAA MN2400 LR03 AM4)*2.

Carrying case.

TM-741/TM-740

6. AIR VELOCITY MEASURES

Fallow the arrows to measure velocity. As

shown in figures.

WARNING

Please don’t touch the vanes by fingers

or foreign body to avoid damage to the

vanes.

TM-741/TM-740

7. OPERATION

7.1 Velocity Unit Button:

Select the m/s Knots(kts) ft/min(fpm)

Km/hr(kph) mph.

7.2 CAL / ℃/℉Button:

Calibration of 10 m/s

1. Prepare the 10m/s velocity.

2. Press CAL button and POWER button

more than 2 second the LCD will

display CAL.

3. Unlocks buttons.

4. Press CAL button again more than 2

second the meter will shut down.

5. Correct succeed.

7.3 ℃/℉Button :

Select ℃/℉.

7.4 MAX/MIN/AVG Button :

Press “MAX/MIN” button simultaneously

Lockup data maximum and average and

minimum value of measure data. Press

the “MAX/MIN” button for more than 1

second to disable this feature.

TM-741/TM-740

7.5 Data Hold button:

Freezes the reading present on the LCD

screen at the moment the button is

pressed.

7.6 Power Button:

Press the ” ” button more than 2

second to power on the meter.

7.7 Auto Power:

To save battery life, the meter powers

down automatically after approximately

12 minutes of inactivity.

7.8 Enable/disable auto power off

Power Off by pressing the ” ” button

more than 2 second the LCD “ ” symbol

will disappear or enable.

TM-741/TM-740

8. INSTRUMENT DESCRIPTION

1. Vane.

2. Display (LCD).

3. Velocity unit select button.

4. Calibration and ℃/℉ button.

5. Data hold button.

6. Maximun/Average/minimum button.

7. Power Button : ON/OFF.

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