Omega FC-21 User Manual Download

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FC-21 Flow Computer

1.3 Specifications:

Specifications:
Environmental

Indoor Use
Altitude up to 2000m
Operating Temperature: 0

C to +50

(-20

C to 55

C optional)

Storage Temperature: -40

C to +85 C

Maximum Relative Humidity : 80% for temperatures

up to 31

C decreasing linearly to 50% RH at

Mains supply voltage fluctuations not to exceed

10%

of the nominal voltage

Transient overvoltage according to INSTALLATION

CATEGORY II (see UL 3101-1 Annex J)

POLLUTION DEGREE 2 in accordance with

IEC 664 (see 3.7.3)

Materials: UL, CSA, VDE approved

Approvals:

CE Approved Light Industrial,
UL File #: E192404
CSA Pending

Display

Type: 2 lines of 20 characters
Types: Backlit LCD or VFD ordering options
Character Size: 0.3" nominal
User selectable label descriptors and units of
measure

Keypad

Keypad Type: Membrane Keypad
Keypad Rating: Sealed to Nema 4
Number of keys: 16

Enclosure

Size: See Dimensions
Depth behind panel: 6.5" including mating connector
Type: DIN
Materials: Plastic, UL94V-0, Flame retardant
Bezel: Textured per matt finish
Equipment Labels: Model, safety, and user wiring

Power Input

The factory equipped power option is internally fused.
An internal line to line filter capacitor is provided for
added transient suppression.
Order Option 1: 110VAC: 85 to 127 Vrms, 50/60 Hz
Order Option 2: 220VAC: 170 to 276 Vrms, 50/60 Hz
Order Option 3: 12VDC: 10.5 to 14 VDC
Order Option 4: 24VDC: 18 to 24 VDC

Flow Inputs:

Analog Input:

Ranges

Voltage: 0-10 VDC, 0-5 VDC, 1-5 VDC
Current: 4-20 mA, 0-20 mA

Basic Measurement Resolution: 16 bit
Update Rate: 5 updates/sec minimum
Automatic Fault detection: Signal over/under-range,

Current Loop Broken

Calibration: Self Calibration and Auto-zero

Continuously

Extended calibration: Learns Zero and Full Scale

of each range using special test mode.

Fault Protection:

Fast Transient: 500 V Protection

(Capacitive Clamp)

Reverse Polarity: No ill effects
Over-Voltage Limit: 50 VDC Over voltage

protection

Over-Current Protection: Internally current

limited Protected to 24 VDC.

Pulse Inputs:

Number of Flow Inputs: one
Configurations supported: single input with or

without quadrature (menu selectable)

Input Impedance: 10 K

Ω

nominal

Pullup Resistance: 10 K

Ω

to 5 VDC (menu

selectable)

Pull Down Resistance: 10 K

Ω

to common

Trigger Level: (menu selectable)

High Level Input
Logic On:

3 to 30 VDC

Logic Off:

0 to 1 VDC

Low Level Input (mag pickup)

Selectable sensitivity: 10 mV & 100 mV

Minimum Count Speed: User selectable
Maximum Count Speed: Selectable: 0 to 20kHz
Overvoltage Protection: 50 VDC
Fast Transient: Protected to 500 VDC

(Capacitive Clamp)

Compensation Input

The compensation input is menu selectable for
temperature, density or not used.

Operation: Ratiometric
Accuracy: 0.01% FS
Thermal Drift: Less than 100 ppm/C
Basic Measurement Resolution: 16 bit
Update Rate: 1 update/sec minimum
Automatic Fault detection:

Signal Over-range/under-range
Current Loop Broken
RTD short
RTD open
Fault mode to user defined default settings

Transient Protection: 500 V (Capacitive Clamp)
Reverse Polarity: No ill effects
Over-Voltage Limit (Voltage Input): 50 VDC

Available Input Ranges

Voltage: 0-10 VDC, 0-5 VDC, 1-5 VDC
Current: 4-20 mA, 0-20 mA
Resistance: 100 Ohms DIN RTD

100 Ohm DIN RTD (DIN 42-760, BS 1904):

Three Wire Lead Compensation
Internal RTD linearization learns ice point

resistance

1 mA Excitation current with reverse polarity

protection

Temperature Resolution: 0.01 C

Control Inputs

Switch Inputs are menu selectable for Start, Stop,
Reset, Lock, Inhibit, Alarm Acknowledge, Print
or Not Used.
Control Input Specifications