Yokogawa EJA440E User Manual download pdf (Page 33)

<3. Parameter Setting>

3-20

IM 01C25T01-06EN

• Procedure to call up the display for pressure

DD and DTM

(excluding EJX_

HART 5[1.2])

[Root Menu] → Diag/Service →

Calibration → Pres sensor trim →

Pres trim info. → Clear P snsr trim

EJX_HART 5[1.2]

DTM

Calibration → Clear P snsr trim

• Procedure to call up the display for static

pressure

DD and DTM

(excluding EJX_

HART 5[1.2])

[Root Menu] → Diag/Service →

Calibration → SP sensor trim →

SP trim info. → Clear SP snsr trim

EJX_HART 5[1.2]

DTM

Calibration → Clear SP snsr trim

3.3.7 Trim Analog Output

Fine current output adjustment is carried out with

D/A trim or Scaled D/A trim.

(1) D/A Trim

D/A trim is to be carried out if the calibration digital

ammeter does not exactly read 4.000 mA and

20.000 mA with an output signal of 0% and 100%.

• Procedure to call up the D/A trim display

DD and DTM

(excluding EJX_

HART 5[1.2])

[Root Menu] → Diag/Service →

Calibration

→ Analog output trim → D/A trim

EJX_HART 5[1.2]

DTM

Calibration → D/A trim

(2) Scaled D/A Trim

Scaled D/A trim is to be carried out if the output is

adjusted using a voltmeter or a meter whose scale

is 0 to 100%.

• Procedure to call up the Scaled D/A trim

display

DD and DTM

(excluding EJX_

HART 5[1.2])

[Root Menu] → Diag/Service →

Calibration

→ Analog output trim →Scaled

D/A trim

EJX_HART 5[1.2]

DTM

Calibration → Scaled D/A trim

Adjustment using a volt meter. (4mA → 1V, 20mA

→ 5V)

1) Select “Change”.

2) Enter the value read on the voltmeter when the out-

put signal is 4mA.

In this case, enter the value of the voltage across a

250Ω resistor (1V).

3) Enter the value read on the meter when the output

signal is 20mA (5V).

4) Select “Proceed”.

5) Connect the voltmeter.

6) Output the 0% output signal and read the output

value.

7) Enter the reading of the voltmeter to the conguration

tool. (The output of the transmitter changes).

8) Conrm the voltmeter reading is 1.000.

9) If the reading on the voltmeter is 1.000, select “Yes”.

If the reading is not 1.000, select “No” and repeat

steps 6 and 7 until the voltmeter reads 1.000V.

10) Output the 100% output signal and read the output

value.

11) Enter the reading of the voltmeter.

12) Conrm the voltmeter reading is 5.000.

13) If the reading of the voltmeter is 5.000, select “Yes”.

If the reading on the voltmeter is not 5.000, select

“No” and repeat steps 10 and 11 until the voltmeter

reads 5.000V.

3.3.8 External Switch Mode

Follow the procedure below to enable or inhibit zero

point adjustment by means of the zero-adjustment

screw on the transmitter.

This is set to “Enabled” when the instrument is

shipped.

To change the mode, follow the procedure below.

• Procedure to call up the display

DD and DTM

(excluding EJX_

HART 5[1.2])

[Root Menu] → Detailed setup →

Device information → Field device

info → Ext SW

EJX_HART 5[1.2]

DTM

Conguration → Device

information1 → Ext SW

Enabled Enable the external zero point

adjustment

Disabled Disable the external zero point

adjustment

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Yokogawa EJA440E User Manual Page 33

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