FAQs

Q: How do I shut off my Flash Alert service alarm from flashing (CHG OIL, LUBE, etc.)?

A: Global Digital Instruments Flash Alerts are service alarms that remind the user to perform specific engine maintenance. The alerts turn on and off automatically at preset intervals of engine run time. After automatic shutoff, the Flash Alert service interval is reset and will show again when service is due. (For all non-button meters)

Q: Why does my tachometer read double the RPM’s?

A: Some ignition systems fire twice per RPM causing the meter to pick up this extra RPM of the engine. This is the exception and not the rule. If your engine does fire more than once per RPM, we have a solution for that condition. Check your owners manual or with your dealer to determine the firing pattern of your engine.

Q: I want to extend the four-foot wire that is supplied with the meter. Will the meter work if I use a longer wire?

A: The wire can usually be extended to eight feet without affecting performance. Ignition systems vary in signal strength. Also, more wraps around the spark plug wire can increase the signal strength possibly allowing a wire longer than eight feet.

Q: I have an engine with a stick coil (coil over plug). When I wrap the wire around the spark plug wire, the meter won’t count RPM’s.

A: This type of ignition requires that you wrap the wire around the top of the coil as illustrated below.

How to install on a stick coil. Click to enlarge

Q: I have a Global Digital Instruments tach and hour meter. I notice that the tach reads double. I am not concerned about this because I am most interested in the hours. If the tach reads double does that mean the hour meter is reading double?

A: The answer is no! The hour meter and the tachometer function separately. The hour meter will always display the correct run time, regardless of the operation of the tach.

Q: The display on my meter is flashing CHG OIL. I changed the oil but the meter is still flashing.

A: The flash Alert system is a reminder to perform a specific service only. The meter will reset itself at the pre-programmed interval.

Q: I purchased a Global Digital Instruments rotating shaft meter for my diesel engine. I want to cut in to the wire that leads to the sensor and extend it. What is the maximum length I can extend the wire?

A: We recommend that the wire not be extended longer than 16 feet. It should be noted that even at sixteen feet you must take in to consideration the routing of the wire. If it is routed near other wires (in a harness) or near metal, there can be loss of signal strength.

Q: Can I mount the meter somewhere on the engine?

A: The meter can be mounted anywhere as long as it is at least 8 inches away from the source of the signal (coil, plug wire, etc.) Do not mount the meter on a surface that is too hot to touch, or over sparkplug wires or ignition coils.

Q: I purchased a Global Digital Instruments vibration activated hour meter. I attached it my stationary piece of equipment but it doesn’t count time. Why doesn’t it work?

A: There is a wire loop on the back of the meter. You must cut it to activate the internal sensor. The meter will now count time.

Q: When I installed my Global Digital Instruments hour meter to the engine. I stripped the wire and wrapped it around the SPARK PLUG. I started the engine and when I touched the meter I received an electrical shock.

A: Never attach the wire directly to the spark plug. Only wrap it around the spark plug wire or around the stick coil (coil over plug). The wire supplied with your meter does not need to be stripped.