Yokogawa EJA115 - Manual (Page 16)

IM 01C22T01-01E 2-9
2. HART COMMUNICATOR OPERATION
(5) Damping Time Constants
The damping constant is set to 2.0 seconds at the
factory. When changing the damping constant, proceed
as follows:
1
F0215.EPS
Call up the Damp display.
EJA:
Damping
2.00 s
2.00
HELP DEL ESC ENTER Enter 0.2 and press ENTER (F4).
(ENTER)
‘0 . 2’
2
EJA:
Basic Setup
1 Unit kPa
2 Re-range
3 Device information
4 Xfer fncfn Linear
5 Damp 0.20s
HELP SEND HOME ENTER
Press SEND (F2) to send the data
to the transmitter.
3
EJA:
Set to nearest
possible value
occurred writing Pres
damping
Press OK...
DEL SET ESC OK
A confirmation display appears.
Press OK (F4), then check to
confirm that disappears.
(OK)
1. Device setup
3. Basic setup
6. Damp
SEND
Example: To change from 2.0 seconds to 0.2 seconds
NOTE
1. Only the damping constants listed in Table 2
are available. When a value not listed in
Table 2 is entered, the value in Table 2
nearest the entered value is set.
2. The damping constant set with the procedure
here is of the damping constant in the trans-
mission part (electric circuit). The damping
constant of the capsule assembly shall be
added to obtain the overall damping constant
of the transmitter.
Table 2
0.2 Sec
0.5 Sec
1.0 Sec
2.0 Sec
4.0 Sec
8.0 Sec
16.0 Sec
32.0 Sec
64.0 Sec
T0203.EPS
(6) Output Signal Low Cut Mode Setup
Low cut can be used on the output signal to stabilize
the output near the zero point.
The low cut point can be set in a range from 0 to 20%
of output. (Hysteresis of cut point: ±1%)
Either LINEAR or ZERO can be selected as the low
cut mode.
Unless otherwise specified, the cut mode is set to
LINEAR at the factory.
(%)
50
(%)
50
0
50
(%)
50
(%)
Output Output
For low cut in linear mode
Input
20 20
0
For low cut in zero mode
Input
F0216.EPS
Example: To set the low cut range to 20% and the cut mode
to ZERO, proceed as follows:
Figure 2.2.2 Low Cut Mode
F0217.EPS
EJA:
Low cut
10.00%
10.00
HELP DEL ESC ENTER Call up the Low cut, and set to
20%.
(ENTER)
(ENTER)
‘2 0’
EJA:
Cut mode
Linear
Linear
Zero
HELP SEND ESC ENTER
Select the Cut mode, and set to
Zero.
EJA:
Basic Setup
4 Device information
5 Xfer fnctn Linear
6 Damp 0.50s
7 Low cut 20.00 %
8 Cut mode Zero
DEL SEND HOME OK
Press SEND (F2) to send the date,
then check to confirm that
disappears.
(SEND)
1. Device setup
3. Basic setup
7. Low Cut, 8. Cut mode
SEND