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EUTECH INSTRUMENTS alpha-pH 2000D Manual de Instruções Página 40

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Instruction Manual αlpha-pH2000D
- 34 -
(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 leet (pulse)
Contact Outputs One SPDT relay
Switching Voltage / Current / Power Max 250VAC / Max 3A / Max 600VA
8.5 Transmitter Function
(a) Current Output 1 – pH/mV Proportional to pH/mV measured
Current output selection 4 – 20mA or 0 – 20mA
pH/mV value for 0 or 4mA current -2.00 to 16.00 pH or 0 to 100% or -1000 to 1000mV
pH/mV value for 20mA current -2.00 to 16.00 pH or 0 to 100% or -1000 to 1000mV
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 +115.0
o
C or +14.0 to +237.0
o
F for pt100/pt1000
-10.0 to +100.0
o
C or +14.0 to +212.0
o
F for NTC300
Temperature value for 20mA current 0.0 to +125.0
o
C or +32.0 to +257.0
o
F for pt100/pt1000
0.0 to +110.0
o
C or +32.0 to +230.0
o
F for NTC300
8.6 Voltage Output & Hold Function Switch
+12 V Output 11.5 to 12.5 V Output - Max 50 mA
Hold Function Switch Hold function to freeze output current (0/4...20mA) and
release control relays
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