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2635A
Users Manual
B-2
AC Signal Cross Talk into an AC Voltage Channel
ACV Error Ratio =
VACrms error
VACrms crosstalk Frequency crosstalk
()
() ()×
Range Ratio (worst case) Ratio (typical)
300.00 m 4.8 × 10
-8
v
vHz×
1.4 × 10
-8
v
vHz×
3.0000 V 1.1 × 10
-7
v
vHz×
3.0 × 10
-8
v
vHz×
30.000 V 1.2 × 10
-6
v
vHz×
2.6 × 10
-7
v
vHz×
150.00/300.00 1.2 × 10
-5
v
vHz×
3.4 × 10
-6
v
vHz×
For example, the typical effect on a channel measuring ac volts (300 mV range) by a
220V ac signal at 60 Hz on another channel would be: 220 X 60 X 1.4 X 10
-8
= 0.18 mV.
AC Signal Cross Talk into an Ohms Channel
AC Frequency = 50, 60 Hz, ±0.1%
OHMS Error Ratio
1
=
Ohms error
VACrms crosstalk
()
()
Range Ratio (worst case) Ratio (typical)
300.00 e 3.3 × 10
-5
Ohms
Vrms
NoEffect
3.0000 ke 2.4
× 10
-6
kOhms
Vrms
6.7 × 10
-7
kOhms
Vrms
30.000ke 3.1 × 10
-4
kOhms
Vrms
8.4 × 10
-5
kOhms
Vrms
300.00 ke 5.6 × 10
-3
kOhms
Vrms
3.7 × 10
-3
kOhms
Vrms
3.0000 Me 3.8 × 10
-4
MOhms
Vrms
3.8 × 10
-5
MOhms
Vrms