Alarms
29
Clean alarm levels are set in accordance with the instructions start-
ing on
page 22
. Alarm mode 1 is used in conjunction with the Con-
tinuous Sampling test type, enabling the Analyser to operate contin-
uously until the specified clean alarm level is achieved.
3 Alarm Mode: 2
Selecting option 2 arranges the relays to operate when the Clean
and Dirty alarm levels are reached/exceeded. Alarm mode 2 will
normally be used in conjunction with the Continuous test type (refer
to
page 20
), but can be used with all other test types as well.
Set the Clean and Dirty alarm levels by inputting the desired levels
in to both the Test options screen (
page 14
) and the Alarm options
screen, also setting the appropriate result format to ISO, NAS or
AS4059, as described on
page 12
.
Both relays are initially off and remain off until an alarm level has
been reached/exceeded.
The following illustrates the switching logic of the Relays :-
Relay 1 (Dirty)
NAS/AS4059E-1 single num- result > set limit
On
ber
result <= set limit
Off
ISO/AS4059E-2 multi-part
any result > corresponding set On
limit
all results <= corresponding set Off
limit
Содержание LPA2
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Страница 70: ...Appendix L 70 Fault Finding ...