Ferret 86 Manual.indd

Ferret 86 Manual.indd
This instrument puts the four most used ignition meters into
one compact package. The bright digital display shows RPM
or Degrees Advance while the strobe light is flashing, and Dwell
Percent or Volts when the strobe is off. Timing Advance Control
Buttons are conveniently located on the handle, allowing easy,
one-handed operation. A 2/4 stroke switch scales readings for
double ended coil or distributor ignitions.
FERRET BRAND LIMITED PRODUCT WARRANTY
GxT, Inc. of Cheboygan Michigan, warrants to the original purchaser that
FERRET brand products are free from defects in materials and workmanship for a period of two years from date of purchase. Our sole obligation
for a product within the above warranties will be to repair or replace,
at our option, any defective parts and return the product to the sender
within the U.S.A., shipping prepaid, if it is sent to our Repair Department
shipping prepaid and accompanied by proof of purchase.
OPERATING SPECIFICATIONS
This Warranty does not apply to products which have been altered
outside the factory; or repaired by anyone other than the factory or its
authorized service centers; or which have been damaged from accidents,
negligence, or abuse; or have been used differently than described in
the printed instructions. Please note that wear and tear on leads and
replacement of consumable items such as: NOx Sensors, Oxygen Sensors, and paper, is not covered by warranty.
DISPLAY
RANGES:
Resolution
Accuracy
ADVANCE .......... to 90 degrees, 4 S .........0.1 degree .......... 1 degree
............................ to 45 degrees, 2 S .........0.1 degree ....... ± 1 degree
TACHOMETER... 400 to 10,000+ rpm .............10 rpm ............... ± 1 %
DWELL ............... 0 to 100 percent .....................0.1 % ............... ± 1 %
VOLTS DC .......... 0 to 19 volts ........................ 0.1 volt ...... ± 1 %, .05v
XENON STROBE LIGHT ............................ works beyond 10,000 rpm
POWER .............. 10 to 16 Volts DC, 1.5 Amp ...............12 volt battery
TEMPERATURE. Operating .................. 0° to 122° F ... -18° to 50° C
............................ Storage .....................-40° to 180° F ... -40° to 80° C
LEADS ............................................................ 5 feet ......... 1.5 meter
WEIGHT .................................................... 1.7 pound ......... 770 gram
SIZE.................... 12 inches tip to tip, 2.8 wide .....................30 x 7 cm
TECHNICAL HELP & SERVICE
Questions or inquiries about service can be answered by
contacting GxT, Inc., at: Toll Free (800) 627-5655. Fax: (231)
627-2727, Toll Free (231) 782-0616, or repair@gxtauto.com.
When sending an item to the factory address it to: GxT, Inc., 520
MM Riggs Drive., Cheboygan, MI 49721-1061 Include a note
describing the problem.
GxT Inc.ʼs sole liability and buyerʼs exclusive remedy is limited to repair
or replacement of the product as stated in the Limited Product Warranty.
THERE ARE NO OTHER WARRANTIES EXPRESSED OR IMPLIED
INCLUDING THOSE OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE AND GxT, INC. SHALL NOT BE LIABLE FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING FROM THE
SALE OR USE OF THE PRODUCT.
Some states do not allow limitations on the length of implied warranties
nor exclusion or limitations of incidental or consequential damages, so
that the above limitations and/or exclusion may not apply to you.
This warranty gives you specific legal rights and you may also have
other rights which may vary from state to state.
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Always wear eye protection when testing vehicles. Be extra careful
near batteries and moving parts. Do not lay tools on a battery.
Battery gas is highly explosive.
a. If a battery explodes flush the acid away from persons skin
with generous amounts of water. Follow up with a neutralizing
solution of baking soda and then more water.
Treat clothing, vehicle parts, and equipment similarly. Any acid
traces inside equipment must be removed by generous rinsing.
Dry equipment and place in a warm 50°C (120°F) oven until
thoroughly dry.
b. Never use a wrench on the ungrounded battery terminal until
the grounded one has been disconnected. Contact between
the vehicle body metal and the hot terminal can cause sparks
to ignite gas or even weld tools into a battery short circuit.
c. Keep the space around a battery well ventilated.
d. Do not make sparks or allow flames near batteries.
Before working on a vehicle set the brakes and block the wheels.
Beware of automatic parking brake releases.
Keep your work area well ventilated and free of exhaust. Engine
exhaust contains deadly poisons. Treat Gas Detector exhaust
and drain hoses the same as the vehicle tailpipe. Both give off
deadly exhaust fumes.
Avoid electrical shocks caused by getting close to live ignition wires
or touching the coil TACH terminal. A personʼs reaction near a live
engine can be more damaging than the shock.
Keep spark producing devices at least 0.5m (18”) above the floor
to reduce the hazard of igniting gasoline vapor.
Do not let test leads fall in a moving fan or pulley. Route leads
away.
Remove finger rings and metal wrist bands. They can short terminals
and become very hot from electric current.
—Read All Instructions Before Using The Meter—
SAFETY PRECAUTIONS
Digital Tach-Advance-Dwell-Volts Timing Light
86
OPERATORʼS MANUAL
TIMING-ADVANCE TEST PROCEDURE
VOLTS & DWELL MEASUREMENTS
This light measures advance by delaying the flash so that it
appears to align the crank shaft TDC mark to its pointer, and
then displaying the degrees delayed. Note that on engines
with ignition contact points, dwell affects timing and must be in
calibration before timing is adjusted.
Connect Power Leads to the engineʼs 12 volt battery. Have
the middle switch pushed down. Use the YELLOW clip lead to
sense dwell and voltage on ignition coils, control solenoids, and
sensors. This clip does not affect
RPM or Advance readings.
1. C o n n e c t t h e p o w e r
leads: RED - positive,
BLACK - negative. Push
the middle switch up for
strobe. Select the RPM x 10 display. Set the 2/4 stroke switch.
Place the Inductive Pickup around the #1 spark plug wire.
IGNITION DWELL
This reading gives the percent of time that a coil minus terminal
is switched to ground. To use, push the left switch toward the
right, by the cam angle symbol. The display will show a decimal
point one place from the right. With the test clip disconnected
or grounded, the display will read 100.0 ±1. It will read 0.00 if
connected to battery voltage. Connect the YELLOW clip to the
coil minus (TACH) terminal. Then run the engine.
2. Prepare the engine for timing tests, such as: warming-up,
disabling electric and vacuum control lines, and cleaning the
wheel timing marks. Then run the engine. The light should
begin flashing.
3. Read RPM x 10, and set the engine speed to the test
specification. Then slide the display switch toward the crank
angle symbol to read degrees of advance. The display will
show a decimal point one place from the right.
4. Point the light beam onto the degree marks at the engine
damper wheel or flywheel, and move the apparent mark to
the TDC position using the Timing Advance Control Buttons.
Then read the timing advance on the display.
5. Compare the measurement with the specification. Timing
adjustments are made by turning the distributor slightly or
by moving the ignition timing sensor.
6. Restore all engine parts to their normal arrangement.
NOTE: Align your eye squarely with the timing marks when
viewing, to avoid parallax error. The strobe light may be aimed
from the side, but marks must be
YELLOW CLIP IS
NOT USED FOR
TACH OR
TIMING.
INDUCTIVE PICKUP AROUND
SPARK WIRE
RED
BLACK
TIMING
MARKS
12 V
BATTERY
TIMING ADVANCE
CONTROL BUTTONS
If dwell specification is only provided in degrees, use the following
formula:
DEGREES X CYLINDERS / 3.6 = DWELL PERCENT
For example:
54 deg.X 4 cyln/ 3.6 =60 %
36 deg.X 6 cyln/ 3.6 =60 %
27 deg.X 8 cyln/ 3.6 =60 %
YELLOW
TACH
12 VOLT
BATTERY
INDUCTIVE PICKUP IS NOT USED FOR
DWELL OR VOLTS MEASUREMENTS.
DUTY CYCLE DWELL
Have the left switch toward the cam angle symbol on the right
side. Connect YELLOW clip to the signal terminal and run engine.
The dwell reading is the percent of time that the signal is switched
below this meterʼs 3 volt input threshold.
Most of these applications read the percent of time that fuel
metering solenoids are turned on. This includes Bosch K &
KE-Lambda Jetronic and GM mixture control carburetors. Most
systems are designed to operate around 50% duty. Follow testing
procedures specified for each engine.
VOLTAGE MEASUREMENT
Push the left switch toward the left
side. A decimal point will be on the
display two places from the right.
Touch the YELLOW clip to a voltage
test terminal. The display shows the DC voltage from the
YELLOW clip to the battery minus clip. The usable range is from
0.00 through 19 volts DC.
Input impedance is 175 kilohms, so it is generally suitable for
circuits under 5 kilohm source impedance. This includes virtually
all signals within an automotive harness, with the exception of
O2 sensors. O2 lambda sensors usually have a high source
impedance (unless good and hot), so connection to them may
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