7.
METER
a.
Meter zero
CALIBRATION
Set TEST power to off and INDICATION to HTR. Ad
just meter zero adjustment for an indicated zero.
Reset INDICATION to .+DC.
b.
Meter accuracy
error: ±2%. max
Connect voltmeter between test panel DC+ jack and
gnd. Check 570 meter for proper dc voltage reading
( ±2%) by comparing against test meter as follows:
(1)
Set VADC fully ccw.
(2)
Set +DC to 200
(3)
Set TEST power to ON.
( 4)
Adjust VARIABLE +DC for +140:, as read on
test meter.
(5)
Read 570 meter: 14 0v, ±2%. max.
(6)
Set +DC to 100 and VARIABLE +DC to CALI-
BRATED.
,
(7)
Read. 570 meter: 100 v. ±2%. max .
12
570 CALIBRATION
NOTES
2-5 -64
TEK 570
FC'.D
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