YOKOGAWA Dpharp vigilantplant EJA Series, User Manual

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