3-18
IM 701210-05E
Precautions to Be Taken When Connecting Probes
• When connecting a probe to the instrument for the first time, perform phase correction
of the probe as described in section 3.7, “Compensating the Probe (Phase
Correction).” Failure to do so will cause unstable gain across different frequencies,
thereby preventing correct measurement. Make the phase correction on each
channel to which the probe is to be connected.
• You cannot perform phase correction of the probe on the frequency module
(701280(FREQ)). Perform phase correction of the probe on another module before
connecting the probe to the 701280(FREQ).
• If the object to be measured is connected to the instrument directly, without using a
probe, a correct measurement cannot be performed due to the input impedance.
• Precautions to Be Taken When Using Voltage Probes Other Than Isolated Probes
(700929)
• Correct measured values cannot be displayed if the probe’s attenuation is not 1:1,
10:1, 100:1, or 1000:1.
• Follow the instructions given in section 5.6, “Setting the Probe Type” to set the probe
attenuation (type) to match the actual value using the soft key menu. If they do not
match, measured values cannot be read correctly.
Connecting Current Probes
When using current probes made by YOKOGAWA*, use the probe power supply
(optional) on the right side panel of the DL750/DL750P.
* Current probes made by YOKOGAWA: 700937, 701930, 701931, and 701933
For details on the connection procedure, see the manual that came with the current
probe.
CAUTION
Do not use the probe power supply terminals (optional) on the right side panel of
the DL750/DL750P for purposes other than supplying power to the current
probes. Also, be sure to use only the number of probes allowed. Otherwise, the
DL750/DL750P or the devices connected to them may get damaged.
3.6 Connecting Probes
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