C.E. Niehoff & Co. N3012-N3210/N3107-N3121/N3237-N3211 Reg Test Procedures - Manual (Page 4)

Page 4
TG66B
If you have questions about your alternator or any of these test procedures, or if you need to locate a Factory Authorized Service Dealer, please contact us at:
C. E. Niehoff & Co.• 2021 Lee Street • Evanston, IL 60202 USA
TEL: 800.643.4633 USA and Canada • TEL: 847.866.6030 outside USA and Canada • FAX: 847.492.1242
E-mail us: [email protected]
Visit our Web site: www.CENiehoff.com
A
B
C
D
A
B
C
D
F-
AC
GND
B+
+
-
+28VDC
IGN
N3237 REGULATOR
LAMP
30V
1W MIN.
FUNCTION GENERATOR
10V PK SQUARE WAVE
200Hz MIN.
*AMPHENOL MS3106E16-9S OR EQUIVALENT
1. SET UP AS DEMONSTRATED IN SCHEMATIC DIAGRAM.
2. MAKE SURE IGN SWITCH IS OFF.
3. TURN ON ADJUSTABLE DC POWER SUPPLY.
4. SET POWER SUPPLY TO 24.0 VDC.
LAMP SHOULD BE OFF. IF LAMP IS ON, REGULATOR IS DEFECTIVE.
5. TURN ON FUNCTION GENERATOR. SET TO 10V PEAK SQUARE WAVE, 200Hz MIN.
LAMP SHOULD BE OFF. IF LAMP IS ON, REGULATOR IS DEFECTIVE.
6. TURN ON IGN SWITCH.
LAMP SHOULD NOW BE ON. IF LAMP IS NOW OFF, REGULATOR IS DEFECTIVE.
7. RAISE VOLTAGE ON ADJUSTABLE POWER SUPPLY .
LAMP SHOULD TURN OFF WHEN POWER SUPPLY VOLTAGE IS RAISED HIGHER
THAN REGULATOR SET POINT (27.0-29.0 VDC). IF NOT, REGULATOR IS DEFECTIVE.
8. REDUCE VOLTAGE ON POWER SUPPLY UNTIL LAMP IS ON. REDUCE SIGNAL GENERATOR
FREQUENCY TO 100Hz OR LESS.
LAMP SHOULD HAVE ONLY VERY WEAK ILLUMINATION BELOW 110Hz. IF NOT,
REGULATOR IS DEFECTIVE.
30 VDC
ADJUSTABLE
POWER SUPPLY
IGN
SWITCH
N3237 REGULATOR TEST SETUP DIAGRAM
N3237/N3211 Regulators
General Test Procedures