> ## Documentation Index
> Fetch the complete documentation index at: https://docs.supplyline.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Operation

> Touchscreen interface navigation, sensor calibration, and daily operation of the Walchem Intuition-6 controller

# Operation

<sub>Source: [Intuition-6 Instruction Manual Rev. H](https://supplyline.com/assets/wal/WAL-IOM_Intuition-6-Instruction-Manual-RevH.pdf), Pages: 36–64</sub>

The Intuition-6 features a 5" color touchscreen for all configuration and monitoring functions.

## Front Panel

<Frame caption="Front panel with home screen showing inputs and outputs">
  <img src="https://mintcdn.com/supplyline/iflbDbrEUDCOz-QA/images/wal/i6/front-panel-home-screen.jpg?fit=max&auto=format&n=iflbDbrEUDCOz-QA&q=85&s=95ddb7e0c0e2ba418ce4589f091d9904" alt="Intuition-6 front panel showing touchscreen home screen, status LEDs, USB port, and padlock loop" width="906" height="547" data-path="images/wal/i6/front-panel-home-screen.jpg" />
</Frame>

| Component               | Function                                             |
| ----------------------- | ---------------------------------------------------- |
| **Power Switch**        | On/Off rocker switch (circuits remain live when off) |
| **Touchscreen Display** | 800 x 480 pixel capacitive touchscreen               |
| **System Status LED**   | Green = running normally                             |
| **Alarm LED**           | Red = active alarm                                   |
| **USB Port**            | Firmware upgrades, config backup, datalog export     |
| **Padlock Loop**        | Security lockout for enclosure door                  |

## Startup

<Steps>
  <Step title="Apply power">
    Turn on the power switch. The display will show the Walchem logo during initialization.
  </Step>

  <Step title="Initial configuration">
    On first startup, configure:

    * Date and time
    * Language preference
    * Input and output assignments
  </Step>

  <Step title="Verify sensors">
    Check that all connected sensors display valid readings on the home screen.
  </Step>

  <Step title="Program outputs">
    Configure each relay for the desired control mode before placing in Auto.
  </Step>
</Steps>

## Shutdown

For planned shutdowns:

<Steps>
  <Step title="Disable outputs">
    Place all relay outputs in Off mode via the HOA menu
  </Step>

  <Step title="Wait for processes">
    Wait for any active processes to complete (biocide timers, bleed cycles)
  </Step>

  <Step title="Power off">
    Turn off the power switch on the front panel
  </Step>

  <Step title="Disconnect power">
    Disconnect power at the source if servicing the controller
  </Step>
</Steps>

<Warning>
  The power switch does not disconnect all internal circuits. Always disconnect external power before opening the enclosure.
</Warning>

## Home Screen

The home screen displays a customizable summary of inputs and outputs. Touch any displayed value to access its detail screen.

### Customizing the Home Screen

1. Press and hold anywhere on the home screen for 3 seconds
2. Use the Edit icons to:
   * **Split** cells to show more items
   * **Merge** cells to show fewer, larger items
   * **Move** items up or down
   * **Delete** items from display
3. Touch the checkmark to save changes

## Screen Icons

| Icon                     | Function                       |
| ------------------------ | ------------------------------ |
| Calibration (target)     | Access sensor calibration      |
| Graph (line chart)       | View sensor trend graph        |
| Edit (pencil)            | Modify settings                |
| Info (i in circle)       | Return to view mode            |
| Close (X)                | Close menu, return to previous |
| Confirm (checkmark)      | Save changes                   |
| Filter (funnel)          | Limit displayed choices        |
| Delete (backspace arrow) | Erase character entry          |

## Menu Structure

<Tabs>
  <Tab title="Alarms">
    Displays all active and recent alarms. Touch any alarm for details.

    **Alarm Types:**

    * Sensor alarms (Hi/Hi, Hi, Lo, Lo/Lo)
    * Output timeout alarms
    * Flow verify alarms
    * Communication errors
    * Calibration reminders
  </Tab>

  <Tab title="Inputs">
    Lists all configured sensor inputs. Touch any input to:

    * View current value and status
    * Access calibration
    * View trend graph
    * Edit settings
  </Tab>

  <Tab title="Outputs">
    Lists all relay and analog outputs. Touch any output to:

    * View current state (On/Off, % output)
    * View accumulated on-time
    * Change HOA (Hand-Off-Auto) state
    * Edit control parameters
  </Tab>

  <Tab title="Config">
    Access system-wide settings:

    * **Global Settings** — Date/time, language, display format
    * **Security Settings** — Passwords and access levels
    * **Ethernet Settings** — Network configuration
    * **Remote Communications** — Modbus/BACnet setup
    * **Email Reports** — Alert and datalog recipients
    * **Display Settings** — Brightness, auto-dim, screen timeout
    * **File Utilities** — USB backup and restore
  </Tab>

  <Tab title="HOA">
    Quick access to Hand-Off-Auto settings for all outputs:

    * **Hand** — Test outputs manually
    * **Off** — Disable outputs
    * **Auto** — Return to automatic control
  </Tab>

  <Tab title="Graphs">
    View trend graphs for any sensor input:

    * Configure time range and Y-axis scale
    * Display multiple inputs on one graph
    * Pinch to zoom, drag to pan
  </Tab>
</Tabs>

## Hand-Off-Auto (HOA) Control

Each output can be set to one of three states:

| State    | Description                                  |
| -------- | -------------------------------------------- |
| **Hand** | Output forced ON regardless of control mode  |
| **Off**  | Output forced OFF regardless of control mode |
| **Auto** | Output controlled by programmed algorithm    |

<Note>
  Hand Time Limit can be configured to automatically return an output from Hand to its previous state after a set time—prevents forgetting a pump in manual mode.
</Note>

## Sensor Calibration

Calibration maintains measurement accuracy. Access calibration from the Input menu by touching the calibration icon.

<Tabs>
  <Tab title="Conductivity">
    **One-Point Process Calibration:**

    <Steps>
      <Step title="Take grab sample">Take a grab sample while viewing the live reading</Step>
      <Step title="Measure in lab">Measure sample conductivity with a lab meter</Step>
      <Step title="Enter value">Enter the lab value in the controller</Step>
      <Step title="Confirm">Touch Confirm to save calibration</Step>
    </Steps>

    **One-Point Buffer Calibration:**

    <Steps>
      <Step title="Prepare standard">Place sensor in known conductivity solution</Step>
      <Step title="Enter value">Enter solution value</Step>
      <Step title="Stabilize">Wait for reading to stabilize</Step>
      <Step title="Confirm">Touch Confirm to save calibration</Step>
    </Steps>
  </Tab>

  <Tab title="pH">
    **Two-Point Buffer Calibration (Recommended):**

    <Steps>
      <Step title="First buffer">Rinse sensor and place in first buffer (e.g., pH 7)</Step>
      <Step title="Confirm first point">Wait for stabilization, then touch Confirm</Step>
      <Step title="Second buffer">Rinse sensor and place in second buffer (e.g., pH 4 or 10)</Step>
      <Step title="Confirm second point">Wait for stabilization</Step>
      <Step title="Review and save">Review slope and offset values, then Confirm to save</Step>
    </Steps>

    **Acceptable pH Sensor Values:**

    | Parameter | Good        | Marginal    | Replace    |
    | --------- | ----------- | ----------- | ---------- |
    | Slope     | 54-62 mV/pH | 48-54 mV/pH | \<48 mV/pH |
    | Offset    | ±30 mV      | ±50 mV      | >±50 mV    |

    <Tip>Ideal slope is 59.16 mV/pH at 25°C. Declining slope indicates aging electrode.</Tip>
  </Tab>

  <Tab title="ORP">
    **One-Point Calibration:**

    <Steps>
      <Step title="Prepare standard">Place sensor in ORP reference solution (e.g., 225 mV)</Step>
      <Step title="Enter value">Enter solution value</Step>
      <Step title="Stabilize">Wait for stabilization</Step>
      <Step title="Confirm">Touch Confirm to save</Step>
    </Steps>

    <Note>
      ORP calibration is typically only needed to verify sensor function. Many applications use uncalibrated ORP readings since relative changes matter more than absolute values.
    </Note>
  </Tab>

  <Tab title="Disinfection">
    **Process Calibration:**

    <Steps>
      <Step title="Take sample">Take grab sample during stable conditions</Step>
      <Step title="Lab test">Measure free chlorine with DPD test kit</Step>
      <Step title="Enter value">Enter measured value in controller</Step>
      <Step title="Confirm">Touch Confirm to save</Step>
    </Steps>

    **Zero Calibration:**

    <Steps>
      <Step title="Prepare zero solution">Place sensor in chlorine-free water</Step>
      <Step title="Set zero">Set value to 0</Step>
      <Step title="Confirm">Touch Confirm to save</Step>
    </Steps>
  </Tab>

  <Tab title="Analog 4-20mA">
    **Two-Point Calibration (Recommended):**

    <Steps>
      <Step title="Set low point">Set transmitter to low point (e.g., 4 mA)</Step>
      <Step title="Confirm low">Enter value and touch Confirm</Step>
      <Step title="Set high point">Set transmitter to high point (e.g., 20 mA)</Step>
      <Step title="Confirm high">Enter value and touch Confirm</Step>
    </Steps>

    **One-Point Calibration:**
    For minor offset corrections, set transmitter to any known mA value and enter that value in the controller.
  </Tab>
</Tabs>

## Sensor Settings

Each sensor type has configurable parameters:

### Common Settings

| Setting            | Description                                |
| ------------------ | ------------------------------------------ |
| Alarms             | Lo/Lo, Lo, Hi, Hi/Hi thresholds            |
| Deadband           | Difference between alarm on and off points |
| Smoothing Factor   | 0-90%, damping for noisy signals           |
| Cal Required Alarm | Days between calibration reminders         |
| Name               | Custom identifier for the input            |

### Conductivity-Specific

| Setting           | Description                            |
| ----------------- | -------------------------------------- |
| Cell Constant     | Match to sensor (0.01, 0.1, 1.0, 10.0) |
| Temp Compensation | NaCl standard or Linear %/°C           |
| Temp Comp Factor  | Linear coefficient (typically 2%/°C)   |
| Default Temp      | Temperature used if sensor fails       |
| Cable Length      | For compensation of long cable runs    |
| Units             | µS/cm, mS/cm, mS/m, S/m, or ppm        |

### pH-Specific

| Setting      | Description                                |
| ------------ | ------------------------------------------ |
| Buffers      | Manual, JIS/NIST, DIN, or Traceable 4/7/10 |
| Electrode    | Glass (standard) or Antimony               |
| Default Temp | Temperature if sensor fails                |

### 4-20 mA Transmitter

| Setting          | Description                                 |
| ---------------- | ------------------------------------------- |
| Transmitter Type | 2-wire loop, 2-wire powered, 3-wire, 4-wire |
| 4 mA Value       | Engineering units at 4 mA                   |
| 20 mA Value      | Engineering units at 20 mA                  |
| Units            | Custom units text                           |

## Digital Input Configuration

Configure each digital input type using the settings below.

### DI State (Flow Switch/Interlock)

| Setting        | Description                              |
| -------------- | ---------------------------------------- |
| Open Message   | Text shown when switch open              |
| Closed Message | Text shown when switch closed            |
| Interlock      | Which state triggers interlock           |
| Alarm          | Generate alarm on Open, Closed, or Never |

### Flow Meter (Contactor)

| Setting         | Description                        |
| --------------- | ---------------------------------- |
| Volume/Contact  | Volume per switch closure          |
| Flow Units      | Gallons, Liters, m³, MG            |
| Totalizer Alarm | Alarm when total exceeds value     |
| Scheduled Reset | Daily, Monthly, Annually, or Never |

### Flow Meter (Paddlewheel)

| Setting         | Description                   |
| --------------- | ----------------------------- |
| K Factor        | Pulses per unit volume        |
| Flow/Rate Units | Volume and time base          |
| Alarms          | Low and High flow rate limits |

### Feed Monitor

| Setting          | Description                        |
| ---------------- | ---------------------------------- |
| Volume/Contact   | Volume per pulse (from pump specs) |
| Totalizer Alarm  | Maximum allowed total              |
| Flow Alarm Delay | Time before loss-of-flow alarm     |
| Flow Alarm Clear | Pulses required to clear alarm     |
| Reprime Time     | Pump on-time when loss detected    |
| Linked Output    | Which relay controls this pump     |

## Ethernet Configuration

Use these settings to connect the controller to the network and enable web/email features.

### Network Setup

1. Go to Configuration → Ethernet Settings
2. Select DHCP or enter fixed IP address
3. Configure subnet mask and gateway
4. Test connection

### Web Interface Access

1. Connect controller to network
2. Enter IP address in web browser
3. Log in with controller password
4. Access all configuration via web pages

### Email Configuration

Configure up to 8 email addresses for:

* Alarm notifications
* Periodic datalog reports
* Calibration reminders

<Note>
  Email requires SMTP server configuration. Contact your IT department for the correct settings.
</Note>

## USB Functions

Insert a USB flash drive to access:

### Software Upgrade

1. Download latest firmware from Walchem website
2. Copy to USB drive root directory
3. Insert drive, navigate to File Utilities
4. Select Software Upgrade

### Config File Backup/Restore

1. Export configuration to USB
2. Import to another controller for quick setup
3. Useful for multi-controller installations

### Datalog Export

1. Select date range
2. Export to CSV format
3. Open in Excel or similar spreadsheet

## Sources

<Card title="Intuition-6 Instruction Manual Rev. H" icon="file-pdf" href="https://supplyline.com/assets/wal/WAL-IOM_Intuition-6-Instruction-Manual-RevH.pdf" horizontal>
  Pages 36–64 • February 2024
</Card>