Equus 3340 - Automotive DMM (10 MegOhm / UL) - Manual (Page 10)

13. COP RPM Function: Measures RPM on vehicles with “Coil
On Plug” ignition systems. One range: 0 to 10,000 rpm.
14. RPM (Tach) Function: Measures RPM. One range: 0 to
10,000 rpm.
15. Dwell Angle Function : Measures dwell angle of break-
er points.
16. OFF Function: Turns unit “off” when function is selected.
17. Function/Range Selector Switch: Selects desired function
or range.
18. Data HOLD Button: Turns the Data Hold function “on” and
“off” (see “Auxiliary Functions” on page 16 for details).
19. MAX/MIN Record Function: Turns the Maximum
Value/Minimum Value Record Mode “on” and “off” (see
“Auxiliary Functions” on page 16 for details).
20. SEL (Select) Button: Selects the desired function when the
Function/Range Selector Switch (item 17) is set to the
Resistance/Continuity/Diode position (item 3), ACmA/DCmA
position (item 9) or Clamp Current Position (item 11).
21. CYL (Cylinder) Button: Selects the number of cylinders for
the vehicle under test when the Function/Range Selector
Switch (item 17) is set to the RPM (Tach) function (item 14)
or Dwell Angle function (item 15).
22. Volts, OHMS, DIODE, CONTINUITY and FREQUENCY
Input Jack.
23. COM Input Jack: Common Input Jack.
24. 15A Input Jack. For red test lead probe connection when
measuring high DC current (up to 15 amps only).
25. DWELL ANGLE, MS °C, °F, BAT, ACmA/DCmA, CLAMP
CURRENT, RPM and COP Input Jack.
26. Liquid Crystal Display (LCD): Displays results of tests or
measurements.
Preparation and Caution Before Use
•
Inspect the Digital Automotive Tester for damage to the case.
Do not use if cracked, distorted, excessively dirty or any
abnormal condition exists.
• Inspect the test leads for damage. Check for cracked insula-
tion, broken or damaged probes, loose or bent probe pins. Do
not use if any abnormal condition exists.
• Set the Function/Range Selector Switch to the proper range
BEFORE taking measurements. If the range/function must
be switched during a test, ALWAYS remove the test leads
from the circuit being measured before switching settings.
9
E