Dwyer 641 Manuale Utente Scaricare il pdf (Pagina 3)

Two buttons and a potentiometer control the setup process.

The SELECT button is used to scroll between the setup

parameters.

The ENTER button allows access to each parameter for

adjustment.

The ADJUST potentiometer is used to change the value of

the parameters.

Holding the ENTER button for 2.5 seconds saves the new

parameter value.

Making Adjustments

The adjustment process has three steps: select the para-

meter, adjust the parameter, save the new value. These are

described in the following steps.

1. Select the parameter: Each time the SELECT but-

ton is pressed the LED indicator will advance to the next

parameter. When the last parameter, SPAN, is selected,

the next time the SELECT is pressed the unit will return

to RUN mode. Press the SELECT button until the LED

indicator illuminates the desired parameter. Press

ENTER. The selected indicator will begin to blink, show-

ing the parameter may now be adjusted. If the unit is left

in the setup mode, after several minutes it will reset to

the operate mode.

2. Adjust the parameter: Turn the ADJUST poten-

tiometer until the desired setting is made. This may be

adjusted using a small screwdriver or similar tool. Be

careful not to force the control past its stops or damage

will result.

3. Save the Parameter: To save the new parameter

press and hold the ENTER button. The LED indicator will

begin to flash at a faster rate. After about 2.5 seconds

all of the LED indicators will flash when the parameter is

saved. If you do not want to save the parameter press

the SELECT button without entering the parameter. The

adjusted value will be discarded and next LED indicator

will be illuminated.

Adjusting the Output Filter

The output filter may be adjusted to smooth the readings

when measuring turbulent flow. The time constant may be

adjusted from 0.5 seconds to 15 seconds. To adjust the fil-

ter time constant, select the FILTER indicator. Press ENTER

to enable adjustment. Turn the ADJUST until the desired

amount of damping is achieved. To save the value press and

hold the ENTER button until the LED indicators all flash, indi-

cating the value was saved. To discard the adjustment press

SELECT before pressing the ENTER button.

Range Selection

The range selection allows you to select one of eight ranges

in either feet per minute (FPM) or meters per second (MPS).

Ranges:

FPM: 250, 500, 1000, 2000, 3000, 5000, 10000, 15000

MPS: 1.25, 2.5, 5, 10, 15, 25, 50, 75

Select the RANGE indicator by pressing ENTER when the

RANGE LED indicator is illuminated. The A,B,C LED indi-

cators will display which range setting is currently active.

Press ENTER to enable adjustment. Turn the ADJUST until

the desired range indication is achieved. If you want to dis-

card the adjustment press SELECT. If you want to save the

range press and hold ENTER. The RANGE LED will blink at

a faster rate for about 2.5 seconds then all of the LEDs will

flash indicating the value was saved.

The range setting is displayed with the LED indicators. The

function of these indicators is summarized on the control

label inside the unit. The following table summarizes the

indicator status for each range setting

1: Indicator on

0: Indicator off

% of Full Velocity

63%

90%

95%

99%

Min.

0.5

1.1

1.5

2.3

Mid.

7.5

17.3

22.5

34.5

Max.

34.5

44.9

69.0

Range/Units

250 FPM

500 FPM

1000 FPM

2000 FPM

3000 FPM

5000 FPM

10000 FPM

15000 FPM

1.25 MPS

2.5 MPS

5 MPS

10 MPS

15 MPS

25 MPS

50 MPS

75 MPS

Run

Filter

Range

Span

4 mA

20 mA

OUTPUT FILTER RESPONSE (values in seconds)

Page 3

Filter Setting on Adjust Dial

641-CE bulletin 11/9/04 3:49 PM Page 3

1 2 3 4

DWYER INSTRUMENTS, INC 1

Commenti su questo manuale

Nessun commento

Dwyer 641 Manuale Utente Pagina 3

Commenti su questo manuale

Prodotti e manuali riguardandi Accessori per l'aria Dwyer 641