ISSPRO R85115 - Manual

ISSPRO, INC. 2515 N.E. Riverside Way, Portland OR 97211
Telephone: (503) 288-4488 Š Toll Free: (800) 888-8065
FAX: (503) 249-2999
Form No. IS076 (1/91) Page 1 of 1
ISSPRO 3 3/8” Dia. Ignition Tachometer
Aircore Series
General Information:
Operating
Voltage: 11-30 VDC: NOTE – Instrument comes equipped with a 12V lamp.
Replace with one of proper voltage when installing instrument on 24V systems.
24 Volt Lamp is P/N 656
Input Signal: Negative terminal of ignition coil
Transient Protection: +100 V, -400 V
Reverse Voltage Protected
Calibration:
Remove the hole plug (if already installed) by pressing above the center enough to allow a small coin, screwdriver,
etc., to be inserted in the slot behind the upper edge. Twist coin or screwdriver to remove. Take care not to drop
jumper into the can. Move jumper to the appropriate position corresponding to 4, 6, or 8 cylinder engines. Install
lamp & socket. Replace hole plug.
Installation:
Mount the tachometer in the dash panel and connect the wires as described below:
Make all your connections to the wires on the Black plug supplied and then plug it into the tachometer’s white connector.
RED – Connect to ignition switched power source.
BLACK – Connect to ground.
WHITE – Connect to negative ( “-” ) terminal of ignition coil.
GREEN – Connect to dash lamp power.
Installation Hints:
1.) When power is applied, the needle
should go to the zero position. If it does
not, there may be a bad connection in the
“hot” (red wire) or ground (black wire)
circuit. Check power to the meter by
measuring with a voltmeter at the plug
(Attach meter leads on the pins that
attach to the red and black wires). If
there is power at the plug, the problem is
in the gauge.
2.) Low voltage (below 10.5 volts) will
cause inaccurate reading. If inaccuracy
is suspected, measure voltage with
vehicle operating and meter connected.
This can be done by connecting a
voltmeter to power source (i.e. fuse
block, etc.) and/or to the pins of the red
and black wires at the point where they
enter the back of the connector plug.
4
6
8
Move Jumper to proper position
for engine cylinders.
(4 cylinder s
Slot
Lamp & Socket
(Remove CCW)
Number of cylinders
Rear view of tachometer