GxT Ferret 63 DIAGNOSTIC ENGINE ANALYZER - Manual (Page 25)

BASIC TEST
Display the results and data using START and MES-
SAGE.
The seconds of cranking data have the following display
form:
Pressing MESSAGE repeatedly will show the following
measurements taken during cranking.
Leave the messages by pressing START or any test
key.
Use CHARGING STARTING next if any of the test results
suggest battery, starter, or alternator problems.
TEST VARIATIONS
If the battery charging current had excessive ripple, indi-
cating an alternator with bad diodes or stator, a message
will show:
If a battery has a slow recovery or will not accept charg-
ing, the CCA performance will not be measured and a
message will show:
The message display readings are taken from different
times in the test sequence. The Cranking volts, Amps,
and RPM are the 15th second cranking measurements.
During the 1500 RPM period alternator amps are read
before the battery is recharged. The estimate of battery
CCA (Cold Cranking Amps) is taken from the cranking
amps and volts and should correspond to the SAE rating
label on the battery. Multiply DIN and BS ratings by 1.5
to approximate SAE. A CCA reading 20% below the bat-
tery rating shows weakness.
When PRINT REPORT
is used the Cranking His-
tory data is printed and
graphed.
STEP SIX
CCA not CALCULATED
RECOVERY too SLOW
AMPS RIPPLE ?Alternator?
-23-
(CRANKING HISTORY)
306 RPM Bat 11.57
122 AMPS 3 Sec
Cranking Volts 10.66
Cranking AMPS 111
Cranking RPM 288
Alternator AMPS 38
BATTERY CCA est. 487
RECOVERY SECONDS 23
------------------------
ENGINE DATA REPORT
------------------------
====CRANKING HISTORY====
SEC RPM BATT AMPS
1 13.33 151
2 326 11.88 129
3 306 11.57 122
4 301 11.35 116
5 300 11.17 114
7 292 11.03 113
9 291 10.85 112
11 289 10.76 112
13 288 10.70 112
15 288 10.66 111
------------------------
CRANKING VOLTS 10.66
CRANKING AMPS 111
------------------------
CRANKING RPM 288
ALTERNATOR AMPS 38
------------------------
BATTERY CCA EST. 487
RECOVERY SECONDS 23
------------------------
==SPARK BURN ANALYSIS==
RPM IGEGY BATTERY
772 43 14.13
IN FIRING ORDER
MIN AVE MAX SLOPE
0.9 2.0 2.1 10
1.1 2.0 2.2 10
1.0 2.0 2.1 15
0.9 2.0 2.1 17
0 1 2 3 4 MS
BURN TIME RANGE
====IGNITION PRIMARY====
850 RPM BAT 14.01
OSC 2 IGEGY 43 DRVR 0.8V
847 RPM DWL 3.6MSEC
DWL 0.3 VARIES TMG 4.8
==== POWER BALANCE ====
ORDER START END %DROP
1 852 767 10
2
849 764 10
3 858 764 11
4 848 763 10
- 0% 10 20 30 +
% RPM DROP
=ELECTRONIC COMPRESSION=
ORDER AMPS %MAX %LOW
1 120 99 1
2 120 99 1
3 119 98 2
4 121 100 0
80 90 100%MAX
% OF PEAK AMPS CRANKING