Tektronix 47E5A

VOLTS
The maximum safe input voltage is ±1200 V (dc +
peak ac) between the + and COM inputs or between
the + input , and chassis .
The
maximum COM floating voltage is ±500 V (dc +
peak ac) to chassis .
The
meter may be damaged by attempting to
measure voltage if the meter is in the resistance
mode of operation and the applied voltage is in
excess of 120 V rms.
If the reading exceeds 1200 Vor the readout blinks
(indicating overrange) disconnect the + lead at once
to prevent possible meter damage.
1. Push in the VOLTS FUNCTION button and the
1.2 kV RANGE
button. See Fig. 9.
2. Connect the COMMON lead to the reference point
(usually a ground or test point) and the HIGH lead to the
unknown voltage to be measured and observe the reading.
3. Reduce the range, using Table 3, until a proper
readout is obtained .
NOTE
When no voltage is applied in the 20 V to 1.2 kV
ranges, the readout is 0000 and individual readout
elements may blink . Also, noise picked up by the
meter leads may increase the readout in the .2 Vand
2 V ranges.
A blinking readout on any range indicates an
overrange condition and a need to select a higher
range.
TABLE 3
Volts Ranges
RANGE
READOUT MEASUREMENT
1.2 kV
1 . 200-0.200
1.2 kV-200 V
200 V 200. 0-020.0 200 V-20 V
20 V
20. 000-02 .00 20 V-2 V
2V
2.000-0 .200 2 V-.2 V
200 mV 0. 200-0.000
.2 V-O V
22
475A/DM44 Operators
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