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Flow Meters ◇ Flow Switches ◇ Flow Transmitters ◇ Digital Displays
Digital Display
RW3
2-wire loop powered transmitter
A loop powered (4-20mA DC) two wire indicator displays 4 1/2 digits for flow rate and 8 digits for totalization. Includes scaled, open collector output for remote totalizer. Numeric password protection prevents unauthorized access to menu. The easy to read menu prompts make the RW3 so easy to program. An isolated scaled pulse output is available for hook up to a remote totalizer.
A solid state strain gauge senses the differential pressure directly which provides a 4-20mA signal Output is proportional to flow rate squared. Square root extraction is required in the receiving device, the digital display requires a 24Vdc power supply can be purchased separately (PS-24 Power Supply) .
Digital Display (Rate and Total)
Power Input:
100mA, 24Vdc power supply (Not Included)
Internal Battery (Setup & totalizer memory storage only)
3 V 250mA -H Lithium (2 yr. Standby life)
Display:
Rate Display: (selectable decimal)
3.5 or 4.5 Digits (selectable), 0.35" High, Display updates
once every two seconds.
Rate Descriptor: /SEC, /MIN, /HR, or Blank
Totalizer Display: (selectable decimal)
8 Digit (99999999), 0.2" High
Totalizer Descriptors: GAL, LIT, FT3, M3 or "blank"
Low Battery Error Detection: "BAT" descriptor
Under / Over range Indication: Flashing display
Environmental:
Operating Temperature
-4ºF (-20ºC) to +158ºF (70ºC)
Humidity
0-90% Noncondensing
Accuracy:
0.1% Full Scale Resolution, ± 1 Count
Temperature Drift:
50 ppm/ºC Typical
200 ppm/ºC Worst Case
Listing: CE Compliant
Inputs:
Signal Inputs:
Full Scale Range: 4 to 20 mA DC
Loop Voltage Drop: 6 Volts Maximum
Reverse Polarity Protection
Over Current Protection to 60 mA
16 Bit resolution; 1 sample every 2 seconds
Low cutoff supplied to inhibit indications at low flow rates
Reset Inputs:
Internal Pullup Resistor: 100 kΩ to ± 3 VDC
High (logic 1): Open or 3-30 VDC
Low (logic 0): Less than .5 VDC
Minimum On: 25 msec
Pulse Ouput:
The pulse output advances with the least significant digit of the totalizer
Type: Opto-isolated open collector transistor
Max. voltage (off state): 30 VDC
Current (on state): 5 mA @ .9 V drop, .1 mA @ .7 drop
Pulse Duration: 15 msec
Pulse Output Rate: 25 CPS max.
Pulse output divider: User selectable. ÷ 1, ÷ 10, ÷ 100 or off
Calibration & Operation:
Input Scaling: Via front keypad
Decimal Point: Via front keypad
Reset Input: Via front keypad or remote dry contact closure
Keypad: 4 tactile feedback keys
Correction Factor
2 Wire Transmitter
Call Toll Free: 800-356-4243 Email: sales@flo-gage.com
RCM Industries, Inc..
Product Links
Password: Unauthorized menu changes can be prevented by entering a user selectable password (5 digit number).
Jumper: An internal jumper shunt is provided for applications requiring a sealed menu and totalizer lockout. Install the jumper to enable the lock. (see Typical Wiring, Pg. 2)