Dostmann TA 888 User manual

TA 888 Hot Wire Anemometer

Max

Min

Flow

Temp

Your purchase of this HOT WIRE ANEMOMETER makes a step forward

for you into the field of precision measurement.

Although this ANEMOMETER is a complex and delicate instrument, its

durable structure will allow many years of use if proper operating

techniques are developed. Please read the following instructions carefully

and always keep this manual within easy reach..

Features

1. Thermal anemometer, available for very low air velocity measurement.

2. Slim probe, ideal for grilles & diffusers.

3. Combination of hot wire and standard thermistor, deliver rapid and

precise measurements even at low air velocity.

4. Records Maximum and Minimum readings with recall.

5. Microprocessor circuit assures maximum possible accuracy, provides

special functions and features.

6. Super large LCD with dual function meter’s display, read the air

velocity & temp. at the same time.

7. Records Maximum and Minimum readings with recall.

8. Data Hold.

9. Power supply by 9V battery.

10. The portable anemometer provides fast, accurate readings, with digital

readability and the convenience of a remote probe separately.

11. Multi-functions for air flow measurement: m/s, km/h, ft/min, MPH,

Knots.

12. Build in temperature , measurement.

13. Thermistor sensor for Temp. measurement, fast response time.

14. Used the durable, long-lasting components, including a strong, light

weight ABS-plastic housing case.

15. Deluxe hard carry case.

16. Applications: Environmental testing, Air conveyors, Flow hoods, Clean

rooms, Air velocity, Air balancing, Fans/motors/blowers, Furnace

velocity, Refrigerated case, Paint spray booths.

Specifications

General Specifications

Display 46.7mm × 60 mm larger LCD display.

Dual function meter’s display.

measurement

m/s ( meters per second )

km/h (kilometers per hour )

ft/min (feet per minute)

MPH (miles per hour)

knots ( nautical miles per hour )

Temp. ---, 

Data hold.

Memory Maximum and Minimum with recall

Sampling Approx.0.8 sec

Operating Temperature 0 to 50 (32to 122)

Operating Humidity Less than 80% RH

Power Supply 9V battery

Power Current Approx. DC 60~90mA

weight 280g

Dimension 210mm×75mm×50mm

Accessories included Hot wire sensor 9V battery

Electrical Specifications

Air Velocity

Measurement Range Resolution Accuracy

m/s 0.1~25.0m/s 0.01m/s

(5%+1d)FS

(full scale = 25m/s)

km/h 0.3~90.0km/h 0.1km/h

ft/min 20~4925/min 1ft/min

MPH 0.2~ 55.8 MPH 0.1MPH

knots 0.2~48.5knots 0.1knots

Notes:

m/s －meters per second km/h －kilometers per hour

ft/min －feet per minute MPH －miles per hour

knots－nautical miles per hour

Temperature

Measuring Range 0 to 50 (32to 122)

Resolution 0.1/0.1

Accuracy

1/1.8

Button

1, Press .The thermal sensor is heated up (5s). Measurement view is

opened: The current reading is displayed, or “――――”lights up if no

reading is available. Press again, turn off the instrument.

2, Press to freeze or unfreeze the displayed readings or air velocity

Zero Adjust.

3, Press to enter a Setup option. Press again to store

the displayed setting in memory.

4, Press to turn on the backlight. Press it again to turn off the

backlight. Press button for 3 seconds to start or exit Setup. (See

"Changing Setup Options.")

5, Press to scroll to the Setup option you want to change.

Press to increase the displayed setting.

6, Press to start recording and press again to stop recording .if enter

a Setup option .scroll to the Setup option you want to change. Press

to decrease the displayed setting.

7, performing a multi-point mean calculation or performing a mean

calculation in time.

8, Press

Max

Min

to step through the maximum and minimum readings. To

exit the MAN/MIX mode, press the

Max

Min

button for 2 seconds to return

to normal operation.

9, To change between displaying the temperature, flow velocity, and

calculated volumetric flow rate: Press

Flow

Temp

Display Elements

1. Low Power.

2. Primary Display: air velocity, recording data or time.

3. Air velocity units.

4. Secondly display data.

5. Secondly display: air flow, temperature, or air velocity data.

6. Record MAX, MIN display.

7. Sign of multi-point mean calculation.

8. Mean calculation

9. Sign of mean calculation in time.

10. The multiple of Secondly display data.

11. Flow units.

12. Temperature units.

13. Flow area units.

14. The multiple of Primary display data.

15. The Sign of Auto Power Off.

16. The sign of time.

17. Freezing the data.

18. Entering or Exiting Setup.

7 8 9

18 17 16

Changing Setup Options

Use Setup to change area unit, flow area, sleep mode settings. The

thermometer stores the settings in its memory.

Setup Options

Entering or Exiting Setup

When the thermometer is in Setup mode, the display shows SETUP.

Press button for 3 seconds start or exit Setup.

Changing a Setup Option

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

2. Press to indicate that you want to change this setting.

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

display.

2. Press to store the new setting in memory.

Notes: Setup is disabled in MIN MAX, Mean mode.

Area unit Setting

When the thermometer is in Setup mode,

press or to scroll to the area unit

setup option (refer Fig.2).

Press button., The string “AREA”

and area unit shows in the screen.

Press or to scroll to unit that you

want to change((refer Fig.3).

4. Press to store the new area in

memory.

Option Menu item

Settings

Chose area unit

Unit set area unit

Change the flow

area

set area of measuring air

flow

Auto Power Off mode SLP auto off or on

Fig 1

Fig.2

Area Setting

Changing the number digits of area and Change the

number value of area. Press or to scroll

to the area value setup option when the thermometer

is in the setup mode. Press button, the area

number flashes. Press or to scroll to digit

that you want to change (refer Fig.3). Press t,

the screen indicate that area number with a flashing digit. Press or

to change the flashing digit from 0 to 9. Press to change the

station of flashing digit and press or to change the number,

the adjust order is from right to left. Press to store the new area

in memory.

Auto Power Off Mode

The thermometer enters sleep mode

(default). That is to say, the meter will

automatically shut off after 20 minutes if no

button press occurs for 20 minutes. When the

thermometer is in Setup mode, the display

shows SETUP. Press or to scroll to

the “ SLP ” page . Press to indicate

“

” or “OFF”. Press or until the setting you want to use

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

On (sleep mode on)or 0FF (sleep mode off).

Fig.3

Measuring Procedure

1. Connect the “Probe’s Plug” to the “Probe Input Socket”.

2. Power on the meter by push the “Power On/Off Button”.

3. Select the desire air velocity units and temperature units.

4. Zero setting:

a. On the “Sensing Head”, slide the sensor cover to the up position

to let the air velocity sensor isolated from the environment.

b. Push the “Zero Button” to let reading value of air velocity shows

zero value.

Slide the sensor cover to the down position, let the air velocity sensor

to contact

the air, refer Fig.2. Extent the telescope probe to the convenient

length, refer Fig.4.

Probe Handle

“Sensor cover” slide to the up position

Air velocity sensor

6. Direction of the sensor head:

There is mark on the top of the “Sensor Head”, When make the

measurement, then this mark should against the measured wind, refer

Fig. 4, Fig5.When sensor head face against the measurement air, then

sensor head face against the measurement air, then the upper display

will show the air velocity value. The lower display will show the

temperature value.

Performing a multi-point mean calculation

1. Press .

is lit. The number of readings recorded is displayed in the

upper line, while the current reading is displayed in the lower line.

2. To change between displaying the temperature, flow velocity and

calculated volumetric flow rate: Press

Flow

Temp

3. If we want to change the units of the current reading, press .

4. To include readings (in the desired quantity): Press (several

times).

Flow

Air velocity sensor

Fig.4 Fig.5

Sensor head (top view)

Probe Handle

Direction mark should face

the measured wind.

5. To end measurement and calculate the mean value:Press .

flashes. The calculated spot mean value is displayed.

4 To return to measurement view: Press .

Performing a mean calculation in time

1. Press for 2 seconds.

is lit. The elapsed measuring time (mm:ss) is displayed in

the upper line, while the current reading is displayed in the lower line.

2. To change between displaying the temperature, flow velocity and

calculated volumetric flow rate: Press

Flow

Temp

3. If we want to change the units of the current reading, press .

4. To interrupt/continue measurement: Press each time.

5. To end measurement and calculate the mean value: Press .

Mean flashes. The calculated mean value in time is

displayed.

7. To return to measurement view: Press .

Holding the Displayed Readings

1. Press to freeze the readings on the display .The display shows

HOLD.

2. To change between displaying the temperature, flow velocity and

calculated volumetric flow rate: Press

Flow

Temp

3. Press again to turn off the HOLD function.

Viewing the MIN, MAX Readings

1. Press

Max

Min

to step through the maximum (MAX), minimum (MIN), or

the average (AVG) readings. The elapsed time since entering MAX/ MIN

mode, or the time at which the minimum or maximum occurred appears on

the display.

2. Press

Max

Min

button for 2 seconds to exit MAX/MIN mode.

Replacing the Batteries

1. Turn off the thermometer if necessary.

2. Loosen the screw and remove the battery door.

3. Replace 9V batteries.

4. Replace the battery door and tighten the screw.

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