1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the Red Lion DT800000 Adjustable Time Base Tachometer. Please read this manual thoroughly before attempting to install or operate the device to ensure safe and efficient performance. Retain this manual for future reference.
2. Safety Information
Observe the following safety precautions to prevent personal injury and damage to the equipment:
- Ensure all power is disconnected before installation or maintenance.
- Installation and servicing should only be performed by qualified personnel.
- Do not operate the device in environments exceeding its specified operating conditions.
- Protect the device from moisture, dust, and extreme temperatures.
- Verify all wiring connections are correct and secure before applying power.
3. Product Overview
The Red Lion DT800000 is an adjustable time base tachometer designed for precise measurement and display of rotational speed or frequency. Its robust design and adjustable features make it suitable for various industrial and automotive applications requiring accurate RPM monitoring.

Figure 1: Front view of the Red Lion DT800000 Adjustable Time Base Tachometer. The display shows a numerical value, indicating its function as a digital readout device for speed or frequency measurements.
4. Installation and Setup
4.1 Mounting
The DT800000 is designed for panel mounting. Ensure adequate space for ventilation and access to wiring terminals. Cut a panel opening according to the dimensions provided in the specifications section. Secure the tachometer using the supplied mounting hardware.
4.2 Wiring
Refer to the wiring diagram provided with your specific unit for detailed connection instructions. General wiring considerations include:
- Power Supply: Connect the appropriate DC or AC power supply to the designated terminals. Verify voltage and current requirements.
- Input Signal: Connect the speed or frequency input signal (e.g., from a proximity sensor, encoder, or ignition coil) to the input terminals. Ensure proper signal type and level.
- Output (Optional): If your model includes output functions (e.g., alarm, retransmission), connect these to the appropriate control systems.
- Grounding: Ensure proper grounding to prevent electrical noise and ensure safety.
Caution: Incorrect wiring can damage the device and connected equipment. Always double-check connections before applying power.
5. Operation
5.1 Power On
Once correctly installed and wired, apply power to the unit. The display should illuminate and show a reading. If the display remains blank or shows an error, refer to the Troubleshooting section.
5.2 Adjusting Time Base and Scaling
The DT800000 features an adjustable time base, allowing for precise scaling of the input signal to display the desired units (e.g., RPM, Hz). Configuration typically involves:
- Accessing Setup Menu: Use the front panel buttons (if present) or a dedicated configuration port to enter the setup menu.
- Setting Input Type: Select the type of input signal (e.g., NPN, PNP, voltage pulse).
- Configuring Time Base: Adjust the internal time base or gate time to match the expected input frequency range and desired display resolution.
- Scaling Factor: Enter a scaling factor to convert the raw input counts/frequency into the desired engineering units (e.g., pulses per revolution to RPM).
- Decimal Point Position: Set the position of the decimal point on the display.
Refer to the detailed programming guide (usually a separate document or included with the unit) for specific menu navigation and parameter settings.
5.3 Reading the Display
The digital display provides a real-time readout of the measured parameter. Ensure the displayed value is consistent with the expected operational range of your application.
6. Maintenance
The Red Lion DT800000 is designed for minimal maintenance. Follow these guidelines to ensure longevity:
- Cleaning: Clean the front panel and display with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Inspection: Periodically inspect wiring connections for looseness or corrosion.
- Environmental Control: Ensure the operating environment remains within specified temperature and humidity limits.
No user-serviceable parts are inside the enclosure. Do not attempt to open or repair the unit yourself.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power, incorrect wiring, faulty unit. | Check power supply connections. Verify voltage. Inspect wiring for shorts or breaks. |
| Incorrect reading | Incorrect scaling, wrong input type, faulty sensor, electrical noise. | Review scaling factor and time base settings. Check input sensor operation. Ensure proper shielding and grounding. |
| Display shows "Err" or similar | Input signal out of range, internal fault. | Verify input signal is within specified limits. Power cycle the unit. If error persists, contact technical support. |
If troubleshooting steps do not resolve the issue, contact Red Lion Controls technical support or your authorized distributor.
8. Specifications
| Parameter | Value |
|---|---|
| Model | DT800000 |
| Brand | Red Lion Controls |
| Item Weight | 0.96 ounces (27.22 g) |
| Manufacturer | COLE-PARMER |
| First Available | February 7, 2013 |
Note: Detailed electrical and environmental specifications are typically found in the product datasheet.
9. Warranty and Support
For warranty information, please refer to the documentation included with your purchase or visit the official Red Lion Controls website. Warranty terms and conditions may vary by region and product.
For technical assistance, product support, or to report issues, please contact Red Lion Controls customer service or your authorized distributor. Contact details can typically be found on the manufacturer's website.







