Series K Manual: Horstmann Radio Telemeter

If you’ve found yourself staring at this box in a dark cupboard, here is the "story" told by its operation manual: The Dual Display:

. This device acts as a precise radio-controlled switch that listens for a specific long-wave signal (often broadcast via BBC Radio 4 transmitters) to tell your electricity meter exactly when to switch between daytime and nighttime tariffs, such as Understanding the "Series K" Manual horstmann radio telemeter series k manual

Unlike older mechanical time switches that could drift and get out of sync (causing your "night" rate to start at 2 AM instead of midnight), the "Radio" part of the Series K ensures it is always perfectly synced with the National Grid’s clock. Troubleshooting Tales If you’ve found yourself staring at this box