AMALGAMATED INSTRUMENT LD5-TMR, Operation And Instruction Manual, Page: 32 / 57

5.6 Relay selection
Section:
AL 1
to
AL 8
Display:
RLYS
Range:
On
or
OFF
Default Value:
OFF
Default Access Level
4
Function number
4330
to
4337
Allows a relay to be allocated to an alarm. For example if a high alarm value has been selected at the
AL1 High
function this alarm could be allocated to relay 3 by selecting
RLY 3 On
at this function. Press the
F
button to
enter this function then use the
^
or
v
pushbuttons to choose the required relay then press the
F
button to toggle
to
On
or
OFF
as required. When relay PI control is used alarm 1 is dedicated to relay 1 and alarm 2 is dedicated to
relay 2 so no selection choice will appear when set for PI control.
5.7 Alarm input channel selection
Section:
AL 1
to
AL 8
Display:
Ch
Range:
tMR
Default Value:
tMR
Default Access Level
4
Function number
4070
to
4077
In this instrument the only choice is to allocate the alarm to the timer operation i.e.
tMR
.
5.8 Alarm relay latching operation
Section:
AL 1
to
AL 8
Display:
Ltch
Range:
Auto
,
Ltch
,
A.b
,
L.b
Default Value:
Auto
Default Access Level
4
Function number
4170
to
4177
Allows selection of alarm latching operation. If set to
Auto
the alarm relays will not latch i.e. they will automati-
cally reset when the display moves out of alarm condition. If set to
LAtch
the relay will latch and will not reset
until the display value is out of alarm condition and either the
F
button is pressed to clear the latch condition or if
power is removed. The relay hysteresis, trip time and reset time settings still apply to latching relays.
In latching mode the alarm annunciator (if annunciators are fitted) will flash when the display goes into alarm
condition. If the display goes out of alarm condition without being acknowledged the flashing period will change to
give a longer “off” time. If the alarm is acknowledged by pressing the
F
button then the annunciator will change
from flashing to solidly lit. Once the alarm has been acknowledged the relay will be free to reset once the display
value moves out of alarm condition.
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