• Part Number: 3-9950-1
  
• Power Supply: 12 to 24 VDC
• One instrument for multiple sensor types
  
• Two diff erent sensor types can be combined in one unit
• Configurable display
• Derived measurements
• Advanced boolean logic
• Optional modules can be added for additionalcapabilities
• USB Port for Field Upgrades using standard
• USB Flash Drive

• General:
• Input Channels: Two frequency or S3L inputs
• Enclosure and Display:
• Case Material: PBT
• Window: Shatter-resistant glass
• Keypad:4 buttons, injection-molded silicone rubber seal
• Display: Dot matrix, LCD
• Indicators: Two horizontal digital bar graphs, four LED relay status indicators
• Update Rate: 1 s
• LCD: Contrast 5 settings
• Size: ¼ DIN
• Mounting:
• Panel: ¼ DIN, ribbed on four sides for panel mounting clip inside panel, silicon gasket included
• Wall: Large enclosure (sold as an accessory
• Terminal Blocks:
  
• Pluggable Screw Type: Use minimum 105 °C rated wire
• Torque Ratings:
  
• Power/Loop: 0.49 Nm (4.4 lb-in.)
• Freq/S3L: 0.49 Nm (4.4 lb-in.)
• Relay Module: 0.49 Nm (4.4 lb-in.)
• Connector Wire Gauge:
  
• Power, Loop: 12 to 28 AWG
• Freq/S3L: 16 to 28 AWG
• Relay Module Connector Wire Gauge:
  
• Relay 12 to 28 AWG
• Ambient Operating Temperature:
  
• DC Power: -10 °C to 70 °C (14 °F to 158 °F)
• AC Power: -10 °C to 60 °C (14 °F to 140 °F)
• Storage Temp -15 °C to 70 °C 5 °F to 158 °F
• Relative Humidity: 0 to 100% condensing for (front only); 0 to 95% non-condensing (rear panel)
• Maximum Altitude: 4,000 m (13,123 ft)
• Enclosure Rating; NEMA 4X/IP65 (front face only)
• Performance Specifications:
  
• System Accuracy: Primarily dependent upon the sensor
• System Response: Primarily dependent upon the sensor. Controller adds a maximum of 150 ms processing delay to the sensor electronics. Minimum update period is 100 ms. System response is tempered by the display rate, output averaging and sensitivity feature
• Electrical Requirements:
  
• Power to Sensors: Voltage +4.9 to 5.5 VDC @ 25 °C, regulated; Current 30 mA Maximum
• Short Circuit: Protected
• Isolation: Low voltage (< 48 V AC/DC)
• Power Requirements:
  
• DC (3-9950-1, 3-9950-2): 24 VDC nominal (10.8 to 35.2 VDC regulated)
  
• AC (3-9950-2): 100 to 240 VAC, 50 to 60 Hz, 24 VA
• Maximum current: 200 mA (without optional relay module)*; 500 mA (with optional relay module)*
• *The current draw of the other modules and the sensors are minimal
• Current Loop: 10.8 to 35.2 VDC 4 to 20 mA (30 mA max.)
• Overvoltage protection: 48 Volt Transient Protection Device (for DC ONLY)
• Current limiting for circuit protection
• Reverse-Voltage protection
• Input Types:
  
• Digital (S3L) or AC frequency
• 4 to 20 mA input via the 8058
• Open collector
• pH/ORP input via the Digital (S3L) output from the 2750 pH/ORP Sensor Electronics
• Conductivity/Resistivity via the Digital (S3L) output from the 2850 Conductivity/Resistivity Sensor Electronics
• Sensor Types: Flow, pH/ORP, Conductivity/Resistivity, Pressure, Temperature, Level/Volume, Salinity, Dissolved Oxygen, Other (4 to 20 mA)
  
• Sensor Input Specifications:
  
• Digital (S3L): Serial ASCII, TTL level, 9600 bps
• Frequency Flow Sensors: 0.5 to 1500 Hz
• Sensitivity(for coil type sensors): 80 mV @ 5 Hz, gradually increasing with frequency to 2.5 V
• Freq. Range (for square wave type sensors): 0.5 Hz to 1500 Hz @ TTL level input or open collector
• K-Factor Range: 0.0001 to 9999999
• Accuracy: ± 0.5% of reading max error @ 25 °C
• Resolution: 1 µs
• Repeatability: ± 0.2% of reading
• Power Supply:
• Rejection: No Effect ± 1 µA per volt
• Short Circuit: Protected
• Reverse Polarity: Protected
• Update Rate: (1/frequency) + 100 ms

• (1) GF Signet 9900 [3-9950-1] Dual Channel Transmitter, 12 to 24 VDC
• (1) Instruction manual

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Instruction Manual

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