What does "repeat accuracy" mean in the Application Data section of your time delay relays?
Repeat accuracy is the percent variance of time within consecutive timing cycles once a time delay relay is set to the required time delay. For example, our TR-6 Series programmable & TR-5 Series non-programmable units have a repeat accuracy of +0.1%. If you set this unit for a 15 second delay, you will always see a delay between 14.985 and 15.015 seconds each time under normal operating conditions (constant voltage & temperature).
See the article on Linear Dial Settings for a discussion on the linear setting of adjustment potentiometers.