Scientific 5000 Series, Manual

Page: 248 / 360

APPENDIX B
13-8
Version 1.23
MODEL 5000 SERIES MANUAL
VIN = 10V
LOAD = 1K
Ω (internal) or program electronic load = 5mA
Step 3: Input Current Test - I
IN
Input regulator current (IIN) can be measured to assure it does not exceed limits.
The following test, the current is tested against a maximum entry:
Test 3:
I
IN
< 10mA
V
IN
= 10V
LOAD = 1K
Ω (internal) or program electronic load = 5mA
Note: The IMAX entry will include the regulator load current. The quiescent (no load)
current can be tested by programming the load to open circuit.
Step 4: Load Regulation
Test 4: V
OUT
< 5.1V
I
MAX
= 800mA
V
IN
= 10V
LOAD = 500mA (electronic load)
Test 5:
Reg < 5% (Load Regulation calculation)
Reg = 100(S4-S2)/S2
Note: S4 (Test 4) is V
OUT
@ 500mA and S2 (Test 2) is V
OUT
@ 5mA.
Step 5: Select Proper Test Fixture (See Figure 12-2)
Use a TO-220 inline fixture with KGA pinout for the LM317 regulator.