Dynalco MTH-103D Tachometer / Hourmeter / Overspeed Trip - Manual (Page 6)

6 MTH-103D Installation and Operation Manual
1.4.1 Configuration Method
Figure 1–2, MTH-103D Setup Flow Chart
Reapply power as explained in 1.3.1.
Press and hold the select push button (for more than ten (10) seconds).