Omega DPF20 Series User Manual

15
DPF20 Frequency, rate, total or period counter Instruction Manual
1.19 Conguraon menu (cont.)
The ‘Alarms’ (‘ALr’) menu congures the independent acvaon of
up to 3 relay outputs (or transistor or SSR drive control), installed
with the R1 oponal modules (or T1 or SSR) (see secon 2.1). For
outputs up to 4 and 6 relays, see special modules R2, R4 and R6 at
secon 2.6. The alarm states are indicated in the front display with
leds marked as ‘1’, ‘2’ and ‘3’.
To congure an alarm, enter into the alarm menu (‘ALr1’, ‘ ALr2’ or
‘ALr3’) and congure the following parameters :
• select ‘Acve’ (‘Act’) to ‘on’
• at ‘Alarm type’ (‘TypE’) select the alarm to act as a maximum type
alarm (‘MAX’) or a minimum type alarm (‘MIn’). The maximum type
alarm (or minimum type alarm) acvates when the display value is
higher (or lower) than the setpoint value.
• at ‘Setpoint’ (‘SEt’) enter the value for the alarm acvaon point.
This parameter is eligible for conguraon through the ‘Fast access’
menu (see secon 1.19.12).
• congure the hysteresis value at ‘Hysteresis’ (‘hySt’). The hyster-
esis applies to the deacvaon process of the alarm. The alarm de-
acvates when the reading has passed the setpoint value plus the
hysteresis value. Hysteresis helps to avoid repeve switching of the
alarm relays, due to uctuang input signals around the setpoint.
• at ‘Acvaon delay’ (‘dEL.0’) congure the delay to apply before
alarm acvaon. The acvaon delay starts counng when the set-
point value is passed. Value from 0.0 to 99.9 seconds.
• at ‘Deacvaon delay’ (‘dEL.1’) congure the delay to apply
before alarm deacvaon. The deacvaon delay starts counng
when the setpoint value plus the hysteresis value, is passed. Value
from 0.0 to 99.9 seconds.
• to work with ‘windowed alarms’ (see graphical example below)
acvate ‘Setpoint 2’ (‘SEt2’) to ‘on’ and then congure the desired
second setpoint value. Second setpoint must always be higher in
value than the rst setpoint.
• the ‘Relay inverted’ (‘r.Inv’) parameter inverts the normal relay
connecons. When set to ‘on’ the relay will be acve when alarm is
inacve. For security applicaons where an inacve relay controls
the shutdown of the system.
• the ‘Locked alarm’ (‘A.Lck’) parameter disables the automac
deacvaon of the alarm. Alarm deacvaon must be performed
manually, by pressing the ‘LE’ front buon (see secon 1.19.14)
• the ‘On alarm’ (‘on.AL’) parameter assigns a predened behav-
iour when alarm is acvated. Select ‘cont’ to connue counng.
Select ‘to_0’ to load ‘0’ on displays. Select ‘to_p’ to load preset
value on display. Parameter ‘dEL.1’ is set to 1 second when ‘to_0’
or ‘to_p’ are selected.
1.19.11 Alarms
On alarm
Connue
To zero
To preset
Alarm 1
Setpoint
Hysteresis
Setpoint 2
Acve
Alarm type
Alarms
Acvaon delay
Deacvaon delay
Relay inverted
Locked alarm
Reading
Time
setpoint
hysteresis
Alarm as maximum,
no hysteresis, no delays
on
o
Time
acvaon
delay
on
o
deacvaon
delay
Time
Alarm as maximum,
with hysteresis and delays
on
o
Time
Alarm as minimum,
no hysteresis, no delays
Reading
Time
Setpoint 2
Setpoint 1
Alarm as minimum,
with double setpoint,
no hysteresis, no delays
on
o
Time

Omega DPF20 Series Specifications

General

Brand	Omega
Model	DPF20 Series
Category	Measuring Instruments
Language	English