11.2 Summary of programmable
functions.
Display
Summary of function
'EnbL'
Alarm enable
Enables or disables the alarm function
without changing the alarm parameters.
See section 11.3.1
'SP1'
Alarm setpoint 1
Adjusts the alarm setpoint. The alarm
is activated when the indicator display
equals the setpoint.
The setpoint can also be adjusted
directly from the operating mode.
See section 11.3.2
'HI.LO'
Alarm function
Defines whether the alarm has a high or
low function
See section 11.3.3
'no.nc'
Normally open or normally closed
output
Determines whether the single pole
alarm output is open or closed in the
alarm condition.
See section 11.3.4
'HStr'
Hysteresis
Adjusts the alarm hysteresis.
See section 11.3.5
'dELA'
Alarm delay
time
Adjusts the delay between the display
equalling the setpoint and the alarm
output being activated.
See section 11.3.6
'SIL'
Alarm silence time
Defines the time that the alarm output
remains in the non-alarm condition
following acceptance of an alarm.
See section 11.3.7
'AcSP'
Access setpoint
Sub-menu which enables the function
allowing direct access to the alarm
setpoints from the transmitter display
mode, and defines a separate security
code.
See section 11.3.8
11.3 Description of programmable functions
The following sections contain detailed descriptions
of each programmable function. They should be
read in conjunction with the alarm programme
structure shown in Fig 13.
11.3.1 Alarm enable: EnbL
This function allows the alarm to be enabled or
disabled without altering any of the alarm
parameters. To check or change the function
select 'EnbL' from the alarm sub-menu and press
P
which will reveal the current setting. The function
may be changed by pressing the
Up
or
Down
button followed by the
E
button to return the 'EnbL'
prompt.
11.3.2 Setpoint adjustment: SP1 and SP2
The setpoint of each alarm relates to the
transmitter display, and each may be independently
positioned anywhere in the transmitter display
range. When positioned close to the display limits,
care should be taken to ensure that hysteresis
does not place the alarm beyond the display limits.
To adjust the setpoint select 'SP1' or 'SP2' from the
alarm sub-menu and press
P
which will reveal the
existing alarm setpoint. Each digit of the setpoint
may be adjusted using the
Up
and
Down
push-buttons, and the
P
button to move to the next
digit. When the required setpoint has been entered
press
E
to return the setpoint prompt 'SP1' or
'SP2'.
11.3.3 Alarm function: HI.LO
Each alarm may be conditioned as a high or low
alarm. To check or change the alarm function
select 'HI.LO' from the alarm sub-menu and press
P
to reveal the current setting. The function may
be changed by pressing the
Up
or
Down
buttons
followed by the
E
button to return the 'HI.LO'
prompt.
11.3.4 Alarm output status: no.nc
This function allows the alarm output to be open or
to be closed in the alarm condition. When deciding
which is required, care must be taken to ensure
that the alarm output is fail safe.
WARNING!
When the transmitter power supply
is removed both alarm outputs will
open irrespective of conditioning.
Therefore for fail safe operation both
alarm outputs should be
programmed to be open in the alarm
condition.
24
