Need to measure, control, or sync events? Then you need to understand timing units. They’re essential tools and systems used in a whole host of applications.
From engine performance to scientific research, from telecommunications to industrial automation, accurate timing is key.
This article will explore two main types of timing units: automotive timing lights and portable timing units (PTUs). We’ll look at their features, applications, and why they matter.
Automotive Timing Lights
If you’re a gearhead or shade-tree mechanic, you probably already know that automotive timing lights are used to check and adjust the ignition timing in gasoline-powered engines. Correct ignition timing helps ensure your engine is running efficiently, delivering the power you expect, and keeping emissions low.
Diesel engines, of course, use diesel timing units, which are specialized tools for setting the fuel injection timing.
Engine timing lights are used to visually inspect the position of the crankshaft relative to the piston.
Features and Specifications
When you’re shopping for an engine timing light, you’ll want to pay attention to the maximum RPM rating. Many lights are rated to 8000 RPM.
You can buy complete timing kits or individual components, such as strobe lights, mag probes, and transducers.
As an example, the Model 3300S complete kit retails for around $469.00.
Portable Timing Units (PTUs)
Portable timing units, or PTUs, are battery-operated systems that you can transport to wherever you need precise time synchronization. These units get their timing cues from GPS, IRIG B, or Have Quick.
Key Features and Functionality
The accuracy and battery life of a PTU depend on the type of oscillator it uses: rubidium, OCXO, or TCXO. Battery life can range from about 3 hours with a rubidium oscillator to 24 hours with a TCXO oscillator.
PTUs also feature a range of output signals, including NTP, IRIG A, IRIG B, IRIG G, Have Quick, and 1PPS.
To ensure uninterrupted operation, PTUs come with an internal battery backup. They also have ethernet connectivity for monitoring and configuration. And because PTUs are often used outdoors, they’re designed to be rugged and weatherproof.
Applications and Use Cases
PTUs are typically used in situations that require precise timing and synchronization, especially in tough outdoor environments.
Here’s an example of a typical PTU specification:
- GPS timing accuracy: +/- 50 ns absolute UTC (OCXO)
In Conclusion
From automotive timing lights to precision timing units (PTUs), there’s a wide range of timing units available for different needs.
Choosing the right one depends on how accurate you need to be, how portable the unit needs to be, and what kind of environment you’ll be using it in. An automotive mechanic has very different needs than a telecommunications company.
Thanks to advances in GPS technology and miniaturization, timing units are becoming more and more accurate, affordable, and accessible all the time.