Copper and Nickel Sensors
Optoelectronic devices that are used in conjunction with Walchem’s on-line analyzers in a variety of applications including electroless copper or nickel baths, microetch baths and a number of other chemistries that contain more than 0.10 grams/liter (g/L) of copper or nickel ions. Flow-through sensors are available for out-of-tank monitoring of solutions, and immersible sensors (copper only) are available for direct in-tank monitoring.
Benefits:
- Concentration Read in Units
Selectable between grams per liter (g/L) or ounces per gallon (oz/gal). Backlit digital display also acts as a bar graph for a continuous “visual summary” of measurement versus set point. - Operator Adjustable Concentration set point, alarm set points (high and low), dead band and pump on time are all easily adjustable. An interlock feature allows external devices (such as a flow switch ) to interlock control relays.
- Simple, Integrated Data Collection
Download stored data from the controller to a USB stick. Use the data to simply and easily validate system performance. The data and event logs show copper or nickel values, as well as accumulated chemical feed and relay activation times. - Four Separate Control Relays & Outputs (WCU) May be used to add copper, caustic, formaldehyde or chelator/stabilizer chemistries. Each output has a replenishment totalizer which may be set in units of time or volume.
- Optional pH Input Board (WNI) May be used to add pH adjustment chemistry. Output has a replenishment totalizer which may be set in units of time or volume.
Specifications:
Inputs
Power: 100-240 VAC, 50 or 60 Hz, 7A max Fuse: 6.3 Amp
Sensor Input Signals (0, 1 or 2 depending on model code)
Walchem Copper or Nickel, or
Contacting Conductivity: 0.01, 0.1, 1.0, or 10.0 cell constant, or
Electrodeless Conductivity (not available on the combination sensor/analog input card) or
Disinfection or
Amplified pH, ORP, or Ion Selective Electrode which requires a preamplified signal. ±5VDC power available for external
preamps. Walchem WEL or WDS series pH/ORP sensors recommended.
Each sensor input card contains a temperature input.
Temperature: 100 or 1000 ohm RTD, 10K or 100K Thermistor
Analog (4-20 mA) Sensor Input (0, 1, 2 or 4 depending on model code) 2-wire loop powered and self-powered transmitters supported 3-wire and 4-wire transmitters supported Each dual sensor input board has two channels: Channel 1, 130 ohm input resistance and Channel 2, 280 ohm input resistance. The combination input board has one channel, 280 ohm input resistance. Available Power: One independent isolated 24 VDC ±15% supply per channel. 1.5 W maximum for each channel. 2W (83 mA at 24 VDC) total power consumption for all channels (four total channels possible if two dual boards are installed.
Digital Input Signals (6): State-Type Digital Inputs Electrical: Optically isolated and providing an electrically isolated 9V power with a nominal 2.3mA current when the digital input switch is closed. Typical response time: < 2 seconds. Devices supported: Any isolated dry contact (i.e. relay, reed switch). Types: Interlock
Low Speed Counter-Type Digital Inputs Electrical: Optically isolated and providing an electrically isolated 9V power with a nominal 2.3mA current when the digital input switch is closed, 0-10 Hz, 50 msec minimum width. Devices supported: Any device with isolated open drain, open collector, transistor or reed switch. Types: Contacting Flowmeter
High Speed Counter-Type Digital Inputs Electrical: Optically isolated and providing an electrically isolated 9V power with a nominal 2.3mA current when the digital input switch is closed, 0-500 Hz, 1.00 msec minimum width. Devices supported: Any device with isolated open drain, open collector, transistor or reed switch. Types: Paddlewheel Flowmeter
Outputs
Powered Mechanical Relays (0 or 6 model code dependent) Pre-powered on circuit board switching line voltage All relays are fused together as one group, total current must not exceed 6A (resistive), 1/8 HP (93W)
Dry Contact Mechanical Relays (0, 2 or 4 model code dependent) 6 A (resistive), 1/8 HP (93W) Dry contact relays are not fuse protected.
Pulse Outputs (0, 2 or 4 model code dependent) Opto-isolated, solid-state relay, 200mA, 40V DC VLOWMAX = 0.05V @ 18mA
4 - 20 mA (0 or 2 model code dependent) Internally powered, Fully isolated 600 Ohm max resistive load, Resolution 0.0015% of span Accuracy ± 0.5% of reading
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