Digital Display(Rate and Total)
 
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).
 

• 3 1/2 or 4 1/2 Digit Rate Display (Selectable)
• 8 Digit Totalizer Display
• 16 Bit A/D Resolution
• Isolated Scaled Pulse Output
• Password Protection of Menu and Totalizer 

• 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 Descript-xor: /SEC, /MIN, /HR, or Blank
• Totalizer Display: (selectable decimal)
•     8 Digit (99999999), 0.2" High
•     Totalizer Descript-xors: GAL, LIT, FT3, M3 or "blank"
• Low Battery Error Detection: "BAT" descript-xor
• 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

• Lockout:
• 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)
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