25
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 9.3.4
'tYPE'
Type of alarm
Defines whether the alarm
operates on the rate or total
display.
See section 9.3.5
'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 9.3.6
'HI.LO'
Alarm function
Defines whether the alarm has a
high or low function
See section 9.3.7
'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 9.3.8
'HStr'
Hysteresis
Adjusts the alarm hysteresis. Only
available on rate alarms.
See section 9.3.9
'dELA'
Alarm delay time
Adjusts the delay between the
display equalling the setpoint and
the alarm output being activated.
See section 9.3.10
'SIL'
Alarm silence time
Defines the time that the alarm
output remains in the non-alarm
condition following acceptance of
an alarm.
See section 9.3.11
'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 9.3.12
9.3.4 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.
9.3.5 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 conditioned as 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 setting, the
alarm must be re-enabled after the alarm
type has been changed – see 9.2.4
9.3.6 Setpoint adjustment:
SPx1 and SPx2
The rate alarm setpoints SPr1 and SPr2
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
'AL1' or ‘AL2’ from the alarm menu and
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 transfer control
between digits. When the required setpoint
has been entered press E to return to the
alarm menu.
9.3.7 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.
