HACH SL250 (01) PDF Document

The specifications for the HACH SL250 are as follows:

Safety information for the HACH SL250 is categorized into four levels:

DANGER: Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING: Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION: Indicates a potentially hazardous situation that may result in minor or moderate injury.

NOTICE: Indicates a situation which, if not avoided, may cause damage to the instrument. This information requires special emphasis.

To ensure safety when using the HACH SL250 lithium battery, follow these guidelines:

Do not use the battery if there is visible damage.

Do not use the battery after strong shock or vibration occurs.

Do not expose the battery to fire.

Keep the battery at temperatures less than 60 degrees Celsius (140 degrees Fahrenheit).

Keep the battery dry and away from water.

Prevent contact between the positive and negative battery terminals.

Do not let unauthorized persons touch the battery.

Discard the battery in accordance with local, regional and national regulations.

Do not use or store the instrument in direct sunlight, near a heat source or in high temperature environments such as a closed vehicle in direct sunlight.

To maintain the safety provided by the instrument enclosure, the instrument enclosure covers must be installed and secured with the supplied hardware.

To charge the HACH SL250 battery, follow these steps:

1. Connect the specified external power supply to an AC mains outlet socket.

2. Connect the external power supply to the power access port on the HACH SL250 meter.

The instrument can be operated while the battery charges.

Do not charge the battery for more than 24 hours.

Use only the external power supply that is specified for this instrument.

To change the display language on the HACH SL250:

1. Push Settings then select Language.

2. Select the applicable language from the list.

To update the date and time settings on the HACH SL250:

1. Select Settings, then Meter, then Date and Time.

2. Use the arrow keys to select the desired format for the date and time.

3. Enter the current time and date information.

The current date and time will be shown on the display and on all logged measurement data.

Operator IDs associate measurements with specific individuals using the HACH SL250. Configuration options include:

Mode: Set the Operator ID function to on or off (the default is off).

Select: Choose an ID from a list. The selected ID will be associated with all sample data until a different ID is chosen. Use the UP and DOWN arrows on the home screen to select an operator ID.

Create: Enter a name for a new operator ID.

Delete: Erase an existing operator ID.

To use Site IDs on the HACH SL250 for associating measurements with locations or samples, navigate to Main Menu then Site ID and choose from these options:

Mode: Set the function to manual, auto, off, or routes. Manual allows manual selection. Auto numbers samples in sequence. Off is the default. Routes provides an ordered subset of the site ID list.

Select: Pick an ID from the list. To show the ID on the measurement screen, set Site ID > Show to Yes and use the RIGHT or LEFT arrow keys.

Create: Add a new site ID to the system.

Delete: Erase existing site IDs. Ensure the meter is in Manual mode to perform a deletion.

Show: Toggle the display of the Site ID on the measurement screen on or off.

Follow these steps to perform a measurement using Chemkeys on the HACH SL250:

1. Set the meter power to on.

2. Enter a site ID and operator ID if traceability is required.

3. Push the applicable Chemkey fully into the slot in one movement. Always use a new Chemkey for each measurement. Do not move or touch the Chemkey once it is in the slot.

4. Rinse the sample cup with the sample water, then fill it to the fill-line.

5. Put the HACH SL250 meter into the sample cup.

6. Wait for the sound alert or the meter removal animation (typically within 1 to 2 seconds), then immediately remove the meter from the cup.

7. Place the meter back into the case and wait for the measurement to complete. A progress bar will show the remaining time.

8. Read the measurement values on the display. If an error occurs, push Details for more information.

9. Rinse the sample cup with deionized water and shake it dry after use.

To connect and perform measurements with probes on the HACH SL250:

1. Ensure the meter shows the correct date and time before attaching the probe.

2. Remove the probe connector port caps. Do not discard these caps as they must be reinstalled when no probe is connected.

3. Plug the probe into the meter.

4. Calibrate the probe before initial use (daily calibration is recommended for best accuracy).

5. Rinse the sample flask with sample water and fill it so the sensor is fully submerged.

6. Place the probe into the flask. If the meter is in Press to Read mode, push Read. If in Continuous mode, the values will display automatically.

To calibrate an attached probe on the HACH SL250:

1. Connect the probe to the meter.

2. Push Main Menu and select Calibrate.

3. If more than one probe is connected, select the applicable probe.

4. Follow the instructions shown on the display. For an ISE probe, use the RIGHT arrow to advance to the next calibration standard, measuring from low to high concentration.

The meter displays a question mark icon if calibration is incorrect and a green checkmark icon when calibration is successful.

To transfer the data log from the HACH SL250 to a computer:

1. Power on the meter and connect it to the computer using a USB cable. It will appear as a drive named Hach Portable Parallel Analysis.

2. Open the DataTemplate folder on the drive and open the LogTemplate.xltx file.

3. Right-click on cell A2 and select XML, then Import.

4. Select all log files from the Data folder on the Hach Portable Parallel Analysis drive.

5. Click Import to display the data in the spreadsheet.

6. Safely remove the meter by clicking the Safely Remove Hardware icon in the task bar before disconnecting the USB cable.

For general maintenance of the HACH SL250:

Clean Spills: Obey all facility safety protocols and discard waste according to regulations.

Instrument Exterior: Wipe with a moist cloth and a mild soap solution, then wipe dry.

Internal Parts: If cleaning is required for the Chemkey slot, optical windows, barcode window, or sample detector, use isopropyl alcohol on a cotton-tipped applicator. Move the applicator in one direction only. For the light shield, use water and a mild detergent.

The diagnostic menu provides information about the HACH SL250 and options for memory management:

1. Push Main Menu and select Diagnostics.

2. Select Disk Space to see available user and internal memory.

3. Select Config Versions or Method Versions to see current software and setting versions.

4. Select Format Memory to erase all data. Note that this will permanently delete all configurations, site IDs, operator IDs, routes, and notes.

When preparing the HACH SL250 for shipping or storage:

Drain all water from the unit to prevent damage from freezing temperatures.

Clean and decontaminate the instrument before shipping.

The battery may remain installed in the meter during shipping, but it must be disconnected from the internal connector.

Disconnect all probes and remove any Chemkeys from the slots before shipping.

Use the original packaging or alternative safe packaging for transport.