Yokogawa EJA440E Manual de usuario descargar pdf (Pagina 27)

<3. Operation>

3-19

IM 01C25T03-01E

• Example: Set the status output to output an

off signal when the input pressure

exceeds 75 kPa with its alert mode

of HI. AL DETECT.

ESC

SET

E50:DO SELECT

PRES

FEED NO OK

SET

E50:DO SELECT

INHIBIT

< INHIBIT >

< PRES >

< SP >

< TEMP >

Use the or key

to select PRES.

Press the key twice to

enter the setting.

Press the (OK) key.

F0350.ai

ESC

SET

E51:DO SIG.TYPE

OFF WHEN ALARM

FEED NO OK

SET

E51:DO SIG.TYPE

ON WHEN ALARM

< ON WHEN ALARM >

< OFF WHEN ALARM >

Use the or key

to select OFF WHEN ALARM.

Press the key twice to

enter the setting.

Press the (OK) key.

● Status output for higher alert value

● Status output for lower alert value

F0351.ai

Output

(%)

Status output

Time (t)

Setting

value

Setting

value

5%* of hysteresis

(5°C for heat)

Output

(%)

5%* of hysteresis

(5°C for heat)

On Off

Example: Status output operation of ON WHEN AL. DETECT

Off

*5% of the setting span of differential pressure / pressure.

(20) Capillary Fill Fluid Density

Compensation

(E10: T.ZERO CMP, E11: TEMP ZERO)

For transmitters with diaphragm seals, this function

is used to compensate the zero shift caused by the

ambient temperature effect on the capillary tubes.

The following equation indicates the relationship

between the calculated output value and the

compensating constant K (%/°C) with the measured

ambient temperature at the capsule module.

Compensated output = output + K × Tamb

(1) Temperature Compensation Mode Setup

(E10: T. ZERO CMP)

When using this function, set T. ZERO CMP to

ON to enable or OFF to disable. To set to ON,

follow the procedure below.

ESC

SET

E10:T.ZERO CMP

OFF

< OFF >

< ON >

OKFEED NO

SET

E10:T.ZERO CMP

• Example: Set the temperature compensation

mode to ON.

Use the or key

to select ON.

Press the key twice to

enter the setting.

Press the (OK) key.

F0352.ai

(2) Zero Shift Compensation Setup

(E11: TEMP ZERO)

Obtain the K compensating value from the

equation(1) below.

K = − ×100 ……… (a)

h×B

span

where,

B: Constant value of ll uid (See Table A.)

span: |URV–LRV|

h: Distance from high pressure side to low

pressure side (m)

EJX118A/EJA118E: Distance from high

side of diaphragm seal to low side of

diaphragm seal.

EJX438A/EJA438E: Distance from

diaphragm seal (high side) to position of

transmitter (low side).

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Yokogawa EJA440E Manual de usuario Pagina 27

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