User Manual

2.6 Connecting Logic Probes
37
Up to four logic probes can be connected to the LOGIC receptacles on the right
side of the instrument.
Each logic probe provides four logic input channels, so up to 16 logic waveforms
can be recorded.
The following logic probes are supported:
• Model 9327 Logic Probe
• Model 9321-01 Logic Probe
• Model 9320-01 Logic Probe
Refer to the instruction manual supplied with the logic probe for specific details.
Before connecting a logic probe to the measurement object
2.6 Connecting Logic Probes
Do not connect logic probes other than those supplied by Hioki to the logic
inputs.
For users of the following legacy models:
Models: 9306, 9307, 9320 and 9321
These can be used with this instrument by connecting the Model 9323 Conver-
sion Cable.
To avoid electric shock and short circuit accidents or damage to the instru-
ment, pay attention to the following:
• The ground pin in the LOGIC connector (plug) of the Model 9320-01 and
9327 Logic Probes (and legacy Models 9306 and 9320) is not isolated
from this instrument’s ground (common ground).
Use grounding-type polarized power cords for the measurement object
and this instrument, and obtain power from the same mains circuit.
Connecting to different mains circuits or using a non-grounding power
cord may cause damage to the measurement object or this instrument
because of current flow through the logic probes resulting from potential
difference between the grounds of the different wiring systems.
To avoid these problems, we recommend the following connection pro-
cedure:
Measurement
Object
Memory
HiCorder
Logic probe
Logic probe
Functional Earth Terminals
GND
Connect this instrument to the same
outlet as the measurement object us-
ing the (supplied) grounding polar-
ized power cord.
Connect the measurement object’s
ground to the GND terminal of this in-
strument. (Always obtain power from
the same mains circuit.)
About Functional Earth:
Memory
HiCorder
Measurement
Object
See "3.5 Grounding the Instrument’s Functional Earth" in the Quick Start Manual