Instruction/ maintenance manual of the product DT9805 Murphy
Go to page of 4
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.
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 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.
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.
An important point after buying a device Murphy DT9805 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Murphy DT9805 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Murphy DT9805 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Murphy DT9805 you will learn all the available features of the product, as well as information on its operation. The information that you get Murphy DT9805 will certainly help you make a decision on the purchase.
If you already are a holder of Murphy DT9805, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Murphy DT9805.
However, one of the most important roles played by the user manual is to help in solving problems with Murphy DT9805. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Murphy DT9805 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
