Instruction manual

Instruction manual αlpha DO 2000
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(c) P/PI Control only
Proportional Range 10 to 500 %
Integral Action Time (IAT) 0.0 to 999.9 minutes
(c) (1) Pulse Length Control (PLC)
Pulse Length 0.5 to 20.0 seconds
(c) (2) Pulse Frequency Control (PFC)
Pulse Frequency 60 to 120 pulses / minutes
Contact Outputs Two SPST relays
Switching Voltage / Current / Power Max 250VAC / Max 3A / Max 600VA
8.3 Wash Function – Wash Relay
Relay contact selection for active mode Energise (EN) or
De-energise (DEEN)
Wash Cycle Interval 0.1 to 200.0 hours
Wash Duration 1 to 2000 seconds
Contact Outputs One SPST relay
Switching Voltage / Current / Power Max 250VAC / Max 3A / Max 600VA
8.4 Alarm Function – Alarm Relay
Alarm Delay 0 to 2000 seconds
Alarm control Steady or fleet (pulse)
Contact Outputs One SPDT relay
Switching Voltage / Current / Power Max 250VAC / Max 3A / Max 600VA
8.5 Transmitter Function
(a) Current Output 1 - DO Proportional to Dissolved Oxygen measured
Current output selection 4 – 20mA or 0 – 20mA
DO value for 0 or 4mA current 0 to 25 mg/l or 0 to 300 %
DO value for 20mA current 0 to 25 mg/l or 0 to 300 %
CU22 function On
- 22mA current output for over range or under range or if
outside zoom setting
Off
- 0 or 4 mA current output for under range or below lower
zoom setting
- 20mA current output for over range or above upper
zoom setting
(b) Current Output 2 - Temperature Proportional to Temperature measured
Current output selection 4 – 20mA or 0 – 20mA
Temperature value for 0 or 4mA
current
-10.0 to +125.0
o
C or +14.0 to +257.0
o
F
Temperature value for 20mA current -10.0 to +125.0
o
C or +14.0 to +257.0
o
F