Murphy DT9805 Automobile Parts User Manual


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3
DT9806
Before wiring the DT9806, determine the output voltage and ground
polarity of the ignition. Table 1 lists the Peak Output Voltage 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 lead to the 90-150 input terminal on the DT9806; if it
is 150-400 volts, then connect the lead to the 150-400 terminal.
If connecting to a Murphy LCDT annunciator refer to Figure 5. See
General Catalog for more information on the LCDT.
NOTE: When installing the DT9806 in a Murphy panel, always connect
the DT9806 to the ignition/input side of the power adapter. If the DT9806
input is connected to the output of the adapter, its display will read zero
RPM, since the adapter filters out the ignition pulses.
1. Locate the calibration switches on back of the unit (see page 1).
2. If calibrating the DT9804 and DT9806 advance to step 3. If calibrating
the DT9803 and DT9805, find the number of teeth for your gear in
Table 2. Close the series of calibration switches listed next to the
number of gear teeth.
3. To set the calibration code on the DT9804 and DT9806, refer to Table 3.
Find the line that matches your engine's cylinders and cycles and set the
DT9804/DT9806 according to the switches marked “ON”.
NOTE: if the ignition system has two energy storage capacitors, count only
half the actual number of engine cylinders for the calibration code.
123456789101112
OPEN
Pushed
“ON”
(closed)
Side View
Calibration
Switches
DO NOT USE A PENCIL TO PUSH SWITCHES
CALIBRATING THE DT9800 SERIES TO YOUR ENGINE
150 2-4-5-8-9
149 3-4-5-8-9
148 1-2-3-4-5-8-9
147 2-6-8-9
146 1-3-6-8-9
145 4-6-8-9
144 1-2-4-6-8-9
143 2-3-4-6-8-9
142 1-5-6-8-9
141 3-5-6-8-9
140 1-2-3-5-6-8-9
139 2-4-5-6-8-9
138 1-3-4-5-6-8-9
137 7-8-9
136 3-7-8-9
135 1-2-3-7-8-9
134 1-2-4-7-8-9
133 2-3-4-7-8-9
132 1-5-7-8-9
131 1-3-5-7-8-9
130 1-4-5-7-8-9
129 3-4-5-7-8-9
128 6-7-8-9
127 3-6-7-8-9
126 4-6-7-8-9
125 3-4-6-7-8-9
124 1-2-3-4-6-7-8-9
123 3-5-6-7-8-9
122 4-5-6-7-8-9
121 3-4-5-6-7-8-9
120 10
119 3-10
118 1-4-10
117 1-3-4-10
116 1-5-10
115 2-3-5-10
114 1-2-4-5-10
113 6-10
112 1-3-6-10
111 2-4-6-10
110 1-2-3-4-6-10
109 3-5-6-10
108 1-4-5-6-10
107 2-3-4-5-6-10
106 3-7-10
105 1-4-7-10
104 1-2-3-4-7-10
103 1-3-5-7-10
102 2-4-5-7-10
101 6-7-10
100 2-3-6-7-10
99 1-3-4-6-7-10
98 1-2-5-6-7-10
97 4-5-6-7-10
96 8-10
95 1-2-3-8-10
94 2-3-4-8-10
93 1-3-5-8-10
92 3-4-5-8-10
91 1-2-6-8-10
90 1-2-4-6-8-10
89 2-5-6-8-10
88 2-4-5-6-8-10
87 2-7-8-10
86 2-4-7-8-10
85 1-2-5-7-8-10
84 1-2-4-5-7-8-10
83 3-6-7-8-10
82 3-4-6-7-8-10
81 1-2-3-5-6-7-8-10
80 9-10
79 2-4-9-10
78 3-5-9-10
77 2-3-4-5-9-10
76 4-6-9-10
75 1-2-5-6-9-10
74 2-3-4-5-6-9-10
73 2-4-7-9-10
72 1-3-5-7-9-10
71 1-6-7-9-10
70 2-3-4-6-7-9-10
69 2-4-5-6-7-9-10
68 4-8-9-10
67 1-3-5-8-9-10
66 1-2-6-8-9-10
65 1-5-6-8-9-10
64 7-8-9-10
63 1-2-3-4-7-8-9-10
62 1-2-3-4-5-7-8-9-10
61 1-2-3-4-6-7-8-9-10
60 11
59 1-5-11
58 1-2-6-11
57 2-3-5-6-11
56 1-4-7-11
55 1-3-4-5-7-11
54 2-5-6-7-11
53 1-2-3-8-11
52 2-3-4-5-8-11
51 1-3-5-6-8-11
50 1-3-4-7-8-11
49 2-3-6-7-8-11
48 9-11
47 1-2-4-5-9-11
46 4-5-6-9-11
45 1-3-5-7-9-11
44 3-5-6-7-9-11
43 1-3-5-8-9-11
42 1-2-3-5-6-8-9-11
41 1-2-4-5-7-8-9-11
40 10-11
39 1-2-3-6-10-11
38 1-5-7-10-11
37 1-3-4-5-6-7-10-11
36 1-2-4-6-8-10-11
35 1-2-4-5-7-8-10-11
34 1-2-3-4-9-10-11
33 2-3-7-9-10-11
32 8-9-10-11
250 2-3-5-6-7-8
249 1-2-3-5-6-7-8
248 4-5-6-7-8
247 1-4-5-6-7-8
246 2-4-5-6-7-8
245 1-2-4-5-6-7-8
244 3-4-5-6-7-8
243 1-3-4-5-6-7-8
242 2-3-4-5-6-7-8
241 1-2-3-4-5-6-7-8
240 9
239 1-9
238 2-9
237 1-2-9
236 3-9
235 1-3-9
234 1-2-3-9
233 4-9
232 1-4-9
231 2-4-9
230 1-2-4-9
229 3-4-9
228 1-3-4-9
227 1-2-3-4-9
226 5-9
225 1-5-9
224 2-5-9
223 3-5-9
222 1-3-5-9
221 2-3-5-9
220 2-3-5-9
219 1-4-5-9
218 2-4-5-9
217 1-2-4-5-9
216 3-4-5-9
215 2-3-4-5-9
214 1-2-3-4-5-9
213 6-9
212 2-6-9
211 1-2-6-9
210 1-3-6-9
209 2-3-6-9
208 1-2-3-6-9
207 1-4-6-9
206 2-4-6-9
205 3-4-6-9
204 1-3-4-6-9
203 1-2-3-4-6-9
202 5-6-9
201 2-5-6-9
200 1-2-5-6-9
199 1-3-5-6-9
198 2-3-5-6-9
197 4-5-6-9
196 1-4-5-6-9
195 1-2-4-5-6-9
194 1-3-4-5-6-9
193 2-3-4-5-6-9
192 7-9
191 2-7-9
190 1-2-7-9
189 1-3-7-9
188 1-2-3-7-9
187 1-4-7-9
186 2-4-7-9
185 3-4-7-9
184 2-3-4-7-9
183 5-7-9
182 2-5-7-9
181 1-2-5-7-9
180 1-3-5-7-9
179 1-2-3-5-7-9
178 1-4-5-7-9
177 1-2-4-5-7-9
176 1-3-4-5-7-9
175 1-2-3-4-5-7-9
174 1-6-7-9
173 1-2-6-7-9
172 1-3-6-7-9
171 1-2-3-6-7-9
170 1-4-6-7-9
169 3-4-6-7-9
168 2-3-4-6-7-9
167 5-6-7-9
166 2-5-6-7-9
165 3-5-6-7-9
164 1-2-3-5-6-7-9
163 1-4-5-6-7-9
162 1-2-4-5-6-7-9
161 2-3-4-5-6-7-9
160 8-9
159 2-8-9
158 1-3-8-9
157 1-2-3-8-9
156 2-4-8-9
155 3-4-8-9
154 1-2-3-4-8-9
153 1-5-8-9
152 3-5-8-9
151 1-2-3-5-8-9
Close Switch
Number(s)
Number
of Gear
Teeth
Close Switch
Number(s)
Number
of Gear
Teeth
Close Switch
Number(s)
Number
of Gear
Teeth
Close Switch
Number(s)
Number
of Gear
Teeth
Table 2:
DT9803 and DT9805 Calibration Chart
Number of
Cylinders
Calibration Switch Code
123456 891011127
ONON
12
ON ON
22
ONON
24
ONON
42
ONON
44
ON
52
ON
54
ON
62
ON
64
ONON
82
ON ON
84
ONON
10 4
ON
12 4
ONON
16 4
ON ON
ONONON
ONONON
Number of
Cycles
ON
32
Table 3:
Calibration Code for DT9804 and DT9806
Consult Murphy for Cylinder and Cycle combinations not listed on this table
Figure 6:
DT9806 typical wiring for negative ground ignition
Figure 7:
DT9806 typical wiring for positive ground ignition
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