26
Programming the Instrument
5.2 Setting the Alarms
Relays S1 and S2 may be assigned as threshold alarms. Relay S3 can be
assigned as a threshold system alarm. Relay S4 can be assigned as a threshold
alarm or relay timer.
1.
From the Main screen, press the
RIGHT ARROW
key.
2.
Use the
LEFT ARROW
key to highlight PROGRAMMING. Press
ENTER
.
3.
Use the
LEFT ARROW
key to highlight ALARMS. Press
ENTER
.
4.
Use the
LEFT ARROW
key to highlight an alarm. Press
ENTER
.
5.
Set the alarm parameters using
and
5.2.1 Threshold Alarms
The alarm relays are activated if the measured value matches the programmed
limit and meets the high or low alarm condition.
5.2.2 System Alarms
The S3 relay can be used to indicate a malfunction detected by the analyzer. We
recommend connecting the S3 relay to an external alarm device to warn the
operator of an alarm condition.
When an alarm occurs, the S3 relay is activated. In the event of manual
acknowledgment to the external alarm device, the relay remains activated even if
the fault is resolved. Press
ENTER
to deactivate the relay and accompanying error
message. In the event of automatic acknowledgement, the relay and message are
deactivated once the alarm trigger disappears.
Table 3 Threshold Alarms
AFFECT
Conc. No °C/°F
Used to select a temperature or concentration threshold. Select
No
when the relay is not used.
LIM
xxxx
Used for entering the setpoint value.
DIRECTION
Up/Down
Select the up or down direction (high or low alarm).
DELAY
xxxs
Time delay in seconds prior to relay triggering
HYST.
XX%
Definition of threshold hysteresis in % (max. 10%). Hysteresis only functions on the set point. It is
located below the set point for the upper alarm and above the set point for the lower alarm.
RELAYS
NO/NC
Relay normally open (NO) or normally closed (NC).
Table 4 Alarm 3 (System Alarm)
MODE
No Threshold System
Choose a threshold function or a system alarm function.
ACCEPT
Auto/Manual
Choose manual (
ENTER
key) or automatic alarm acknowledgement.
RELAYS
NO/NC
Select normally open or normally closed.
