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Summary of programmable alarm functions
Display Description of function
'EnbL'
Alarm enable
Enables or disables the alarm function
without changing the alarm parameters.
See section 9.2.4
'tYPE'
Type of alarm
Defines whether the alarm operates on
the rate or total display.
See section 9.2.5
'SPr1'
Alarm setpoint 1
or
Adjusts the alarm setpoint. The
‘SPt1’
alarm is activated when the rate or
total display equals the setpoint.
See section 9.2.6
'HI.LO'
Alarm function
Defines whether the alarm has a high
or low function
See section 9.2.7
'no.nc'
Normally open or normally closed
output
Determines whether the single pole
alarm output is open or closed in the
non alarm condition.
See section 9.2.8
'HStr'
Hysteresis
Adjusts the alarm hysteresis. Only
available on rate alarms.
See section 9.2.9
'dELA'
Alarm delay
time
Adjusts the delay between the display
equalling the setpoint and the alarm
output being activated.
See section 9.2.10
'SIL'
Alarm silence time
Defines the time that the alarm output
remains in the non-alarm condition
following acceptance of an alarm.
See section 9.2.11
'AcSP'
Access setpoint
Sub-menu which enables direct access
to the alarm setpoints from the display
mode and defines a separate security
code.
See section 9.2.12
9.2.4 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 menu and press
P
which will reveal the current setting. The function
can be changed by pressing the
Up
or
Down
button followed by the
E
button to return to the
alarm menu.
9.2.5 Type of alarm: tYPE
This function conditions the alarm to operate on
the rate or total display. Alarm 1 and Alarm 2 may
both be rate or total alarms, or one may be
conditioned for rate and the other for total.
To check or change the type of alarm, select 'tYPE'
from the alarm menu and press
P
which will reveal
the current setting. The function can be changed
by pressing the
Up
or
Down
button followed by the
E
button to return to the alarm menu.
Note:
To prevent accidental conditioning the
alarm must be re-enabled after the alarm function
has been changed – see 9.2.4.
9.2.6 Setpoint adjustment: SPx1 and SPx2
The rate alarm setpoints SPx1 and SPx2 may be
positioned anywhere between 0 and 20000
providing this corresponds to an input current
between 3.8 and 20.2mA. The total alarm
setpoint SPt1 and SPt2 may be positioned
anywhere between 00000000 and 99999999
To adjust the setpoint select 'SPr1' or ‘SPt1’ from
the alarm menu. Note: ‘SPr1’ is displayed when a
rate alarm has be selected and ‘SPt1’ a total
alarm has been selected. Press
P
which will
reveal the existing alarm setpoint. Each digit of the
setpoint can be adjusted using the
Up
and
Down
push-buttons, and the
P
button to move to the next
digit. The position of the decimal point is
determined by the d.P. function. When the
required setpoint has been entered press
E
to
return to the alarm menu.
9.2.7 Alarm function: HI.LO
Each alarm can be conditioned as a high or low
alarm. To check or change the alarm function
select 'HI.LO' from the alarm menu and press
P
to
reveal the current setting. The function can be
changed by pressing the
Up
or
Down
buttons
followed by the
E
button to return to the alarm
menu.
