Yokogawa EJX930A - Manual (Page 38)

<3. Parameter Setting>
3-27
IM 01C25R02-01E
• Procedure to call up the display
DTM (HART 5) Diag and Service → Service →
Loop test →
Display Item Contents
Manual Test Set the current value or % value at
Test output value, then click the
Start button.
Auto Test Set the interval and rate of change
of current output at Auto Test
Setting, then click the Start button.
(2) DO Test
This function performs the contact and pulse output
test.
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Output condition → Process Alerts →
DO config → DO Test →
DTM (HART 5) Diag and Service → Service → DO
test →
Display Item Contents
Status High Contact output: OFF
Status Low Contact output: ON
Frequency Frequency range 0 to 10,000Hz
Exit Output test is canceled
(3) Flow Simulation Mode
The flow value can be calculated by using pseudo
values instead of using actual measurements of
differential pressure, static pressure, and external
temperature.
This is called “flow simulation mode.”
The output current value becomes the simulation
value and the LCD continuously displays the
simulation value and alarm (AL.90 SIM) in
alternating sequence.
F0308.ai
Select the desired simulation mode from the list
below, and set the unit and value.
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Simulation/Flow Simulation* →
DTM (HART 5) Configuration → Simulation →
→ Simulation
Mode
(Select the
combination
of pseudo
variables)
Off: –
ON: DP Differential pressure only
ON: SP Static pressure only
ON: DP
SP
Differential pressure and
static pressure
ON: ET External temperature only
ON: DP
ET
Differential pressure and
external temperature
ON: SP
ET
Static pressure and external
temperature
ON: DP
SP
ET
Differential pressure, static
pressure and external
temperature
Check
Flow
Calc
Differential pressure, static
pressure, and external
temperature without
damping
→ Sim Pres
Unit
Select the unit for the differential
pressure
→ Sim Pres Set the differential pressure value for
simulation
It is similar about SP and ET.
*: “Simulation” is for HART 5, “Flow Simulation” is for HART 7