KEP ES749 - Page 80

ES749 Flow Computer
76
Dene the ow quantity per output pulse if the relay is congured
for "RELAY PULSE OUTPUT".. This is expressed in units per pulse
(i.e. ft
3
/ pulse).
Note:
Ensure that the max. owrate (full scale value) and the
pulse value entered here agree with one another. The max.
possible output frequency is 5Hz. The appropriate pulse
value can be determined as follows:
Pulse value > estimated max. owrate (full scale)/sec
required max. output frequency
Input:
Number with oating decimal point: 0.001...1000.0
Display: 1.000 ft3/P
PULSE VALUE
Enter the pulse width. Two cases are possible:
Case A: Relay set for "MALFUNCTION" or limit value
The response of the relay during alarm status is determined by
selecting the pulse width.
• Pulse width = 0.0 s (Normal setting)
Relay is latched during alarm conditions.
• Pulse width = 0.1...9.9 s (special setting)
Relay will energize for selected duration, independent of
the cause of the alarm. This setting is only used in special
cases (i.e. for activating signal horns).
Case B: Relay set for "RELAY PULSE OUTPUT"
Set the pulse width required for the external device. The value
entered here can be made to agree with the actual ow amount and
pulse value by using the following:
Pulse width < 1 .
2 • max. output frequency (Hz)
Input:
Number with oating decimal point:
0.01...9.99 s (pulse output)
0.00...9.99 s (all other congurations)
Display: .01 s
PULSE WIDTH
PULSE VALUE
PULSE WIDTH
6.12
RELAYS
(Continued)
RELAYS