Dynalco MTH-103D Tachometer / Hourmeter / Overspeed Trip - Manual (Page 5)

MTH-103D Installation and Operation Manual 5
1.3.1 Power Up – Signal or dc-powered
Apply power from either:
a. A signal frequency generator or a pickup (minimum 4.0 Vrms; maximum 15
Vrms) connected to terminals (A) and (B) (no polarity).
or...
b. A 9–30 Vdc source connected to terminals (1)(+) and (4)(–). (1.5 Vrms
nominal signal required).
The software revision number will display for one second when power is initially
applied.
Note
If flashing colons appear on the display,
there is insufficient power being applied to the unit.
1.3.2 Run Mode
The unit will always power up in the RUN mode and with the speed display. In the
RUN mode, parameters can only be displayed; they cannot be changed. Momen-
tarily pressing and releasing within ½ second, the push button will display the name
of the next parameter available in the RUN mode. Momentarily pressing and
releasing the push button again will display the value of that parameter.
The parameters, in order of their availability in the RUN mode, are as follows (bold
items in the following list are specific fixed displays ): Refer to Figure 1–2, page 5.
Actual speed value (RPM)
HOUrS
Actual number of hours
triP
Actual setpoint value of trip (may be hours or speed)
SPEEd
Display returns to speed value
If the push button is not pressed within 20 seconds, the unit will return to the
speed value (RPM) display.
1.4 Configuration Mode
As a safety consideration, The CONFIGURATION mode is entered from the
RUN mode by pressing and holding the push button for at least ten (10) sec-
onds:
a. When the MTH-103D is pickup powered, during the initial 30 seconds of
power up condition,
or...
b. When the MTH-103D is dc powered, the speed signal must be zero (0).