Thermo Fisher Scientific Alpha pH 2000D - Manual (Page 36)

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 – 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 +100.0
o
C or +14.0 to +212.0
o
F for NTC300
Temperature value for 20mA current 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
8.7 Display
LCD UV coat, backlit 14 segments display with symbols for status
information
Back light On/Off selectable with four levels of brightness control
8.8 Power Supply
Input 80 to 250VAC/DC, 50/60Hz, Approximately 10VA
Main Fuse 315mA Time Delay, 250V, Bussmann BK/GDC-315mA
Pollution Degree 2
Transient Voltage Category II
Connector 5-pin screw terminal
8.9 Electrical data and Connections
pH/mV Input 8-pin Screw Terminal (3.5mm pitch)
Temperature Input 8-pin Screw Terminal (3.5mm pitch)
Relay 1, Relay 2, Wash Relay & Alarm Relay 9-pin Screw Terminal (7.62mm pitch)
Current Output 1, Current Output 2, 12V output &
Hold function switch 13-pin Screw Terminal (3.5mm pitch)
Connection terminal 5-pin, 8-pin, 9-pin & 13-pin terminal connectors
8.10 Mechanical Specifications
Dimensions (W x H x D) - Wall Mount 144 x 144 x 111.5 mm
Weight - Wall Mount 950g (unit) / 1100g (Packed)
Environmental Rating - Wall Mount NEMA 4X, IP65
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