Tektronix 570, Manual

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CALIBRATION
8. RANGE DC VOLTS, +DC
a. RANGE DC VOLTS. +DC error: ±2%. max
Check RANGE DC VOLTS accuracy as indicated on
570 meter. Check +DC accuracy on test meter at
DC+ test jack.
RANGE +DC
DC operating
VOLTS voltage
700 300; ±2%. max
350 300; ±2%. max
350
200; ±2% . max
350 100; ±.5%. max
140
100; ±.5% . max
140 100
570 meter
indication
error: ±2%. max
300
300
200
100
100
Adjust VAdc for 70v test meter reading.
70
100
70 50
70
Adjust VAdc for 35
v
test meter reading.
35 50
35 20
35
Adjust VAdc for 14
v
test meter reading.
14 20 14
Adjust VARIABLE +dc for 7 v test meter reading.
7
20
Set VAdc to CALIBRATED
140 50; ±2%. max
140 20; ±2%. max
9.
-DC
a . -DC range
7
o
to -100v
Set INDICATION to -DC. Vary -DC thru it's range
and note indication from 0 v to at least -100 v on
test meter and 570 meter.
TEK 570 FCP
2-5-64
NOTES
Sa.
570 meter indicates more than ±2% error
(1) Trouble may be either a bad meter or meter
series resistor
Sa. 7 v can't be made when VARIABLE
.
: jc
full
ccw
(1) Pick V525 6ANS.
(2) Change V540 12AT7
(3) Recheck DC+ for exactly +lOOv.
(4) Recheck -150v.
570
CALIBRATION
13