eXact 240 - 3.1 Power Supply Calibration

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240-0664
SECTION I I 1 ------------------------------------------------- CALIBRATION
CALIBRATION PROCEDURE
THE FOLLOWING TEST EQUIPMENT OR SUITABLE EQUIVALENTS OF KNOWN
ACCURACY ARE REQUIRED FOR COMPLETE CALIBRATION OF THE TYPE 240
FUNCTION GENERATOR.
1. MULTIMETER
2. OSCILLOSCOPE
3. DISTORTION NALYZER
4. AUTO TRANSFORMER
TRIPLETT MODEL 630
TEKTRONIX 503
HEWLETT PACKARD 3308
GENERAL RADIO TYPE M5
3.1 POWER SUPPLY
3.1.1 PRELI MINARY SETTINGS AN D A DJUSTMENT S
(A) PLACE A STRAP BETWEEN THE CHAS GRD AND CKT GRD.
(B) SET THE MUL T IPLIER sw1TCH To . 001 AND THE CYCLES/SEC
DIAL TO X1.
3.1.2 PO WER S UPPLY RE S I STA NCE CHECKS
3 .1. 3
USING THE MULTIMETER, VERIFY THAT THE POWER SUPPLY RESISTANCES
ARE AS SPECIFIED BELOW:
-210
VOLT SUPPLY
APPROXIMATELY
8,000
OHMS
+250
VOLT SUPPLY
APPROXIMATELY
60,000
OHMS
MINIMUM
+100 VOLT SUPPLY APPROXIMATELY
22,000
OHMS
PO WER
S
UPPLY VOLT AGE
CHECKS
(A) CONNECT THE FUNCTION GENERATOR THROUGH THE VARIAC TO 117V,
60 CPS .
(s) USING THE MULTIMETER, VERIFY THAT THE POWER SUPPLY VOLTAGES
ARE AS SPECIFIED BELOW:
-210 VOLT SUPPLY
+100 VOLT SUPPLY
+250 VOLT SUPPLY
- 11 VOLT SUPPLY
-210V0C (ADJUSTABLE)
+100 ±5VDC
+250 ±13VDC
- 11 ±1.1VDC
3.1.4 POWER S UPPLY REGUL A TION
VERIFY THAT ALL SUPPLIES REGULATE AS THE INPUT VOLTAGE JS
VARIED FROM 105 TO 125 VAC.
3.1.5 PO WER SUPPLY RIPPLE CHECK
(A) SET THE OSCILLOSCOPE CONTROLS AS FOLLOWS:
VERTIC AL SENSITIVITY
INPUT COUPLING
SWEEP TIMING
TRIGGER
MAX.
AC
10 MSEc/cM
CONTINUOUSLY RUNNING