Murphy DT9804 manual

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Table of contents for the manual

  • Page 1

    DT -8605N Revised 07-97 Section 20 (00-02-0180) Description The Digital SELECTRONIC ® DT9800 series features a tachometer-only and tachometer with built-in overspeed switch. These tachometers are highly accurate and dependable due to digital solid-state electronics and a quartz crystal time base. The surface-mount enclosure makes it easy to instal[...]

  • Page 2

    DT9805 1. Connect the magnetic pickup as shown in Figure 3 . 2. Connect the overspeed switch wiring as shown Figures 3 and 4 . Observe the polarity of the overspeed switch. The positive terminal must be connected to the positive side of the circuit as shown. 3. If connecting to a Murphy LCDT annunciator refer to Figure 5 . See General Catalog for m[...]

  • Page 3

    3 DT9806 Before wiring the DT9806, determine the output voltage and ground polarity of the ignition. T able 1 lists the Peak Output V oltage and Ground Polarity of some common ignitions. Figure 6 displays wiring to a negative ground ignition and Figure 7 for positive ground units. If the ignition output voltage is 90-150 volts, connect the ignition[...]

  • Page 4

    The overspeed set point switches are available on the DT9805 and DT9806 only . The overspeed set point can be set within ± 5 RPM, over a range of 0010 to 9990 RPM. Setting of the overspeed set points is made by properly adjusting of three rotary switches. Each switch can be adjusted in increments of ten. T o set the switches perform the following:[...]