Yokogawa EJX115A - Manual (Page 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
Status output
Time (t)
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
On
On
On
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 >
OK FEED NO
SET
E10:T.ZERO CMP
ON
• 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 fill fluid (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).