TB 9-6625-1957-24
(6) Reduce calibrator output to minimum.
Figure 1. Tektronix, Type DM 501 - left side view.
b. Adjustments. Adjust R155 INTEGRATOR ZERO (fig. 1) until TI indicates all zeros.
9. Ac Voltage
a. Performance Check
(1) Set RANGE/FUNCTION switch to 2 AC VOLTS.
(2) Set calibrator for an output amplitude of 1.8 V at an output frequency of 1 kHz.
If TI does not indicate within limits specified in first row of table 4, perform corresponding
adjustment as listed in table 4.
(3) Repeat technique of (1) and (2) above using the remaining TI settings and
calibrator outputs listed in table 4 below. If TI does not indicate within limits specified in
Table 4. Ac Voltage
Calibrator
Test instrument
RANGE/FUNCTION
output
indications
Adjustments
Amplitude
setting
Min
Max
1.8 V
1.0 kHz
2 AC VOLTS
1.7872 V
1.8128 V
R70 AC CAL
18 V
8.0 kHz
20 AC VOLTS
17.872 V
18.128 V
C42 20 V AC COMP
180 V
8.0 kHz
200 AC VOLTS
178.72 V
181.28 V
C45 200 V AC COMP
450 V
8.0 kHz
500 AC VOLTS
446.7
V
453.4
V
C48500 V COMP
450 V
20.0 kHz
500 AC VOLTS
444.4
V
455.6
V