Yokogawa EJX930A - Manual (Page 37)

<3. Parameter Setting>
3-26
IM 01C25R02-01E
Example of Pulse Output
F0307.ai
T = 1sec
The number of pulses (PPS)
(*1) Example of scaled pulse
Pulse Rate =10kg
(*2) Example of freqency output
Configuration: Freq at 100% =10000Hz
Flow Rate: URL =100% 10000(PPS)
 Scaled pulse
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Signal condition → Total Flow →
DTM (HART 5) Configuration → Total Flow →
→ Total Flow Unit Select the unit of total flow
→ Pulse rate
Set the volumetric flow rate or
mass flow rate per one pulse.
<Example>
Scaled pulse 10 kg Set
1) Enter “kg” to Total Flow Unit
2) Enter “10” to Pulse rate
 Frequency output
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Signal condition → Total Flow →
DTM (HART 5) Configuration → Total Flow →
→ Freq at 100% Set the number of output pulse per
second at 100% flow rate.
Max. frequency: 10kHz
Duty cycle: Approx 50%
<Example>
Freq at 100% is 10000 Hz Set
1) Enter “10000” to Freq at 100%
3.3.13 Test Output, Simulation, and Squawk
NOTE
Fixed current output, DO Test, Flow Simulation
Mode, and Device Variable Simulation Function
continue for a given holding time, then is
released automatically. Even if the HART
configuration tool power supply is turned off or
the communication cable is disconnected, the
test output will continue for that time.
The holding time can be selected from 10 min*,
30 min, 60 min, 3 hour, 6 hour or 12 hour.
*: Default value.
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Diag/Service
→ Test Auto Release Time
DTM (HART 5) Diag and Service → Service
→ Test Auto Release Time
(1) Fixed current output
This feature can be used to output a fixed current
for loop checks. The available range for test output
depend on the settings for the AO lower limit and
AO upper limit parameters, whose limit is from
3.8mA (-1.25%) to 21.6mA (110%).
Refer to the subsection 3.3.1 about the setting of
AO lower limit and AO upper limit.
While this function works, “TEST” is displayed on
the integral indicator.
 In the case of using DD (HART 5/HART 7)
and DTM (HART 7)
Call up the test output parameter (Loop test) and
select the output signal.
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Diag/Service →
Test → Loop test →
Display Item Contents
4mA Output a 4mA DC signal
20mA Output a 20mA DC signal
Other Set a desired output signal value
End Exit
 In the case of using DTM (HART 5)
Call up the test output parameter (Loop test) and
select either manual test or auto test, and set the
current value.