Tektronix 213 DMM Instruction Manual page 71

Calibration-213 Service
A. POWER SUPPLY AND DISPLAY
Equipment Required
1. Digital Voltmeter
2. Screwdriver
For adjustments and test points (TP), see
ADJUSTMENT LOCATIONS
pullout page in the Diagrams section.
Control Settings
POWER
DMM
VOLTS
VOLTS-mA/DIV
SEC/DIV
INPUT COUPLING
TRIGGER
INTENSITY
LEVEL-SLOPE
VOL TS-mA/DIV VAR
HORIZ MGF VAR
ON
Button out
Button in
1 (black scale)
1
m
GND
INTL AC AUTO
Full ccw
Midrange of either slope
(do not set at midrange
of control)
CAL detent
CAL detent
1. CHECK/ADJUST LOW-VOLTAGE POWER SUPPLIES
a. Connect the Digital Voltmeter between TP545
(+15 V) and common.
b. CHECK-Reading is +15.00 V ± 0.15 V.
c. ADJUST -+15 V Adj, R467, for reading of +15.00 V.
d. Connect the Digital Voltmeter between each of
the test points shown in Table 6-2 and common.
e. CHECK-Readings are within tolerance shown.
REV. B, MAR. 1976
TABLE 6-1
Power Supply Voltage Tolerance
Test Point Reading Tolerance
TP550 (+6.5 V)
+6.5 V ± 0.3 V
TP555 (-6.5 V) -6.4 V ± 0.3 V
TP540 (+75 V) +75V±3V
2. CHECK/ADJUST HIGH-VOLTAGE POWER SUPPLY
a. Connect the Digital Voltmeter between TP530
(-1000 V) and common. -
b. CHECK-Reading is -1000 V ± 10 V.
c. ADJUST-HV Adj, R525, for reading of -1000 V.
3. CHECK BATTERY CHARGER OPERATION
a. Connect the Digital Voltmeter to the Battery Char-
ger Test Point.
b. Connect the instrument power plug to the power
line.
c. For SN 8030000 - up, CHECK - Reading of +0.020
to +0.024. ADJUST - R448 Charge Adjust, for +0.022.
For SN below 8030000, CHECK-Reading of +0.20 to
+0.030.
d. Disconnect the instrument power plug from the
power line.
e. CHECK-Reading of -0.035 to -0.075.
6-5