DHC BT400 User Manual

10
7.
When testing older model diesel engines, the
users need to run up the engine to 2500 rpm for
15 secs.
RUN ENGINE UP
TO 2500RPM 15
SEC
8. Press «ENTER» to read the ripple from the charging system to the battery.
One of the three testing results will be displayed along with the actual testing
measured.
RIPPLE DETECTED NORMAL
Diodes function well in the alternator / starter.
RIPPLE
DETECTED
xx.xx V
NORMAL
NO RIPPLE DETECT
Ripple is not detected.
NO RIPPLE DETECT
PRESS ENTER
EXCESS RIPPLE DETECTED
One or more diodes in t
he alternator are not
functioning or there is stator damage. Check to
ensure the alternator mounting is sturdy and
that the belts are in good shape and functioning
properly. If the mounting and belts are good,
replace the alternator.
RIPPLE
DETECTED
xx.xx V HIGH
9. Press the «ENTER» key to continue the charging system with accessory
loads. One of the three results will be displayed along with the actual testing
measured.
CHARGING SYSTEM HIGH WHEN
TEST WITH ACCESSORY LOADS
The voltage output from the alt
ernator to the
battery exceeds the normal limits of a
functioning regulator.
ALT. LOAD VOLTS
xx.xx V HIGH
Check to ensure there are no loose connections and that the ground
connection is normal. If there are no connection issues, replace the regulator.
Since most alternators have the regulator built-in, this will require you to
replace the alternator.
10
English

DHC BT400 Specifications

General

Brand	DHC
Model	BT400
Category	Measuring Instruments
Language	English