Intra Automation digiflow 515, Инструкция по установке и эксплуатации

Страница: 7 / 47

Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual
7
Analog Input 4 – 20 mA:
Inputs: 2 for flow (split range), 1 for pressure, and 1 for temperature, for flow correction, or
2 for flow (split range) and 2 for pressure for energy–balance.
Input Impedance:
120
Ω
.
Circuit: All inputs are isolated, no common ground.
RTD Input:
Range: -310 to +1472°F.
RTD Type: Pt100 according to DIN 43760.
Non–Linear Correction: The non–linearity of the RTD is internally compensated.
Pressure Input:
Type: Absolute or gauge.
Span: The pressure at 4mA and 20mA are programmable. Linear interpolation for all other points.
Atmospheric pressure: If a gauge pressure sensor is used, the atmospheric pressure must be entered.
Pulse Output:
Pulse Width: Adjustable between 10 ms and 90 ms.
Duty Cycle:
≥
1 : 1.
Logic: Open Collector, Active Low.
Current sinking: max. 100 mA.
Pulse generation: The pulse count is proportional to the counter difference in selectable units of 10 (1, 10, 100,
....100000).
External Keyboard:
Function: One input controls the display and one input resets the total-counters.
Circuit: An input voltage higher than +18 V is detected.
Communication Port:
Type: An RS232 interface is provided. Optionally there is a RS485 multipoint communication interface
for up to 32 instruments connected to a common bus.
Baud Rate: 300 – 9600 Baud.
Data Bits: 7 or 8 selectable.
Parity: None, even or odd.
Stop Bits: 1 or 2 selectable.
Data logging: Output in intervals up to 9999 min or by key stroke.
Relay Output:
Function: High– and Low–flow rate alarms based on the flow rate, mass, corrected volume, or energy.
Form: Normally open. (SPST)
Max. Voltage 250 V AC
Max. Current 6 A AC