
8.7 Command Message Description
169
8
Chapter 8
Contro
lling the
Instru
ment From
a Comp
uter
When network A, D, E or F is selected
Numerical value1
Note
• Use this command after executing the
:MODE
command to activate the mea-
surement mode.
• Depending on the equipment under test settings and measurement mode, the
settable power supply polarity and the status of equipment under test vary.
• Set unused bits (bit 7, bit 12 through bit 15 (numerical value 1), bit 6 through
bit 15 (numerical value 2)) to 0.
• For network A, C, D, E, F or G automatic measurement cannot be set for
internally powered equipment.
• Free current cannot be set.
Queries the type and setting of automatic measurement
Bit
Item
Explanation
Earth leakage current
Leakage current
between enclosure
and line
Enclosure - Earth
leakage current
Enclosure - Enclosure
leakage current
Free current
(only network A)
bit0
Normal condition
Set at least one of bits
0 and 1 to 1. Equip-
ment other than class I
equipment cannot be
set.
Set all bits to 0.
Set at least one of bits
0, 1 and 2 to 1. bit2
cannot be set for class II
equipment.
Devices with internal
power, bit1 and bit2
cannot be set.
bit1
Single-fault condition
:Disconnection of one wire
in power line
bit2
Single-fault condition
:Disconnection of earth
conductor in power line
Set all bits to 0.
bit3
Single-fault condition
:Application of 110% volt-
age(Positive phase)
Set all bits to 0.
bit4
Single-fault condition
:Application of 110%
voltage(Negative phase)
bit5
Positive phase
Set at least one of bits
5 and 6 to 1. Devices
with internal power
supplies cannot be set.
Set at least one of bits 5
and 6 to 1. Devices with
internal power supplies
cannot be set.
bit6
Negative phase
bit7
Not used
Set all bits to 0.
Set all bits to 0.
bit8
DC
bit9
AC
bit10
Application of line voltage L
Set at least one of
bits 10 and 11 to 1.
Devices with inter-
nal power supplies
cannot be set.
bit11
Application of
line voltage N
bit12
Not used
Set all bits to 0.
bit13
bit14
bit15
Summary of Contents for ST5540
Page 2: ......
Page 6: ...Contents iv Index i ...
Page 29: ...23 2 Chapter 2 Instrument Labels and Screens Instrument Labels and Screens Chapter 2 ...
Page 80: ...4 8 Changing the Measurement Method Auto Manual 74 ...
Page 121: ...115 8 9 7 Chapter 7 Instrument System Settings Instrument System Settings Chapter 7 ...
Page 144: ...7 14 Setting the Backlight 138 ...
Page 284: ...10 14 Measurement Networks 278 ...
Page 290: ...11 4 Instrument Disposal 284 ...
Page 320: ...Appendix4 External Dimensions A30 ...
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