Emerson Liqui-tect MC68HC16Z1 - Manual (Page 32)

System and Control Options
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6.3.6 Set Up Sensitivity for Contamination Detection
Each zone may be set up with a sensitivity level at which contamina-
tion on the cable is detected. Examples are construction debris and
dust.
• The most sensitive setting is 20 µA—light contamination will trig-
ger an alarm.
• The least sensitive setting is 300 µA. This setting requires heavy
contamination to activate an alarm.
Increase the setting if nuisance alarms occur.
• From the Setup Zone 1 Menu, choose Contaminated, as shown above right, and press Enter ↵ .
• The Contaminated Detection Sensitivity screen displays the value for detection of contamination
(in the example at right,
50 UA
, where UA represents µA or microAmps):
• To change the value, press and hold one of the arrow keys ↑↓ to scroll through the numbers
20-300.
• Press Enter ↵ .
NOTE
Do not set this setting greater than the sensitivity for water
detection setting—for example, if the water detection setting is
50 µA, do NOT set the contamination sensitivity level at 60 µA,
or any value greater than 50 µA. If the contamination setting is
greater than the water detection setting, contamination alarms
will never occur.
Setup Zone 1 Menu
SETUP ZN1 ZONE 1
CONNECTED: Y
LABEL: ZONE 1
↑↓
=NEXT
↵
=SELECT
UNITS: FT
AUTO CALIBRATE
WATER DETECT:150 UA
> CONTAMINATED:050 UA
Contamination Detection
Sensitivity
CHANGE SENSITIVITY
FOR CONTAMINATED
50 UA
↑↓
=SELECT
↵
=END