Yokogawa EJX210B Manual de usuario descargar pdf (Pagina 55)

100

101

<8. Setting Parameters>

8-20

IM 01C27C01-01EN

8.3.9 Unit for Displayed Temperature

When the instrument is shipped, the temperature

units are set to C (Centigrade). Follow the

procedure below to change this setting.

• Procedure to call up the Sensor Range.Units

Index display

AI3 block : Sensor Range.Units Index

Conrm that °C(deg C) is selected in the

Sensor Range.Units Index parameter for the

temperature

(AI3 block).

Note: When the unit is changed by Sensor Range.Units Index

parameter in temperature ( Al3 block) , units of capsule

temperature is also changed.

8.3.10 Unit for Displayed Static Pressure

Follow the procedure to change the static pressure

unit.

Changing this parameter also changes the unit for

the static pressure display.

• Procedure to call up the PV Range.Units Index

display

AI2 block : PV Range.Units Index

Conrm that KPa is selected in the PV Range.

Units Index parameter for the static pressure

(AI2 block).

Monitoring the high or low static pressure of the

capsule depends on the setting of parameter

‘SP Select.’

• Procedure to call up the SP Select display

AI2 block: SP Select

Select High or Low in the SP Select parameter

for the static pressure (AI2 block).

Type of static pressure is set Absolute pressure

(Abs) at shipment.

When changing monitoring type of static pressure,

Follow below procedure.

• Procedure to call up the Static Press Type

display

AI2 block: Static Press Type

Select gauge pressure (Gauge) or absolute

pressure (Abs) in the Static Press Type

parameter for the static pressure (AI2 block).

8.3.11 Zero Point Adjustment and Span

Adjustment

Each EJX-B Series Differential Pressure/Pressure

Transmitter is characterized by factory. But there

are some errors caused by environment and

installed posture.

There are Zero and Span Adjustments to ne-tune

those errors.

Zero Adjustment is adjustment for one point to

adjust the bottom value of the measurement range

as 0 % of output.

The Span Adjustment denes input and output

characteristic between two points that’s one side

assumed as standard.

This is used when there is doubt of span drift or

when it is impossible to make zero at absolute

pressure with adjustment for user’s pressure

standard.

(1) Zero Point Adjustment

a. To set 0% at current input, perform

following procedure.

This method is used only when the pressure at

bottom of measurement range is zero.

• Procedure to call up the low limit adjustment

parameter (Calibration Lowest Point).

AI1 block : Calibration Lowest Point

Set 0 to the Calibration Lowest Point

parameter of differential pressure (AI1 block).

• Procedure to call up the calibration

adjustment parameter (Cal Cmd).

AI1 block : Cal Cmd : CAL_LOW

Lower limit is changed by using Cal Cmd

parameter for differential pressure (Al1

block).

• Procedure to call up the calibration status

parameter (Cal Status).

AI1 block : Cal Status

Conrm the value of CAL_SUCCESS (1)

using the Cal Status parameter.

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Yokogawa EJX210B Manual de usuario Pagina 55

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