CALlBRA TION
24.
HEATER
a.
Setup
HORIZONTAL
HORIZONTAL VOLTS/DIY
INDICATION
PLATE
1
HTR
6.3
HEATER
b.
R350
Connect P jack to K jack on test panel. Position
the spot to the left hand graticule line.
Connect the P jack to a HTR jack and observe a
horizontal deflection.
Adjust VARIABLE heater for exactly 8.9 major div
deflection.
Adjust R350 (INDICATION switch) for
a
reading of
100% on the meter.
c.
HEATER
error: ±5%. max
Check HEATER ranges (keep VARIABLE heater at
100%. ±5%) as follows:
HORIZONTAL
deflection; approx
HEATER
VOLTS/DIY
max error
1.25
.2
8.8; ±2.2 minor div
1.4
.2
9.9; ±2.5 minor div
2.0
.5
5.6; ±1A minor div
2.35
.5
6.6; ±1.7 minor div
2.5
.5
7.0; ±1.8 minor div
3.15
.5
8.9; ±2.2 minor div
4.2
1
5.9; ±3.0 minor div
4.7
1
6. 6; ±1.7 minor div
5.0
1
7.0; ±1.8 minor div
6.3
1
8.9; ±2.2 minor div
7.5
2
5.3; ±1.3 minor div
12.6
2
8.9; ±2.2 minor div
18.9
5
5.3; ±1.3 minor div
25
5
7.0;
±
1.
9
minor div
35
5
9.9; ±2.5 minor div
50
10
7.0; ±1.9 minor div
117
20
8.3; ±2.0 minor div
Return HEATER to 6.3 and set VARIABLE heater
to 100%. Remove jumper between P and HTR jacks.
20
570 CALIBRATION
NOTES
2-5-64
TEK 570 FCP
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