Ceyear 4992A, User Manual

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Chapter II Operation Guide
13
In order to ensure the service life of 4992A and the effectiveness and accuracy of
measurement, tests should be done under the following conditions.

Temperature range:
Storage temperature range: -40
℃
to +70
℃
Operating temperature range: -10
℃
to +50
℃

Low air pressure:
Low air pressure (altitude): 0-4600m
2 Selection of power line
4992A Radio Test Set is provided with the three-core power cord that conforms to
international safety standards. The power cord should be inserted into the appropriate power
socket with the protective grounding wire, so that the casing of this instrument can be grounded. It
is recommended to use the accompanying power cord and replace it with the same type of
250V/10A power cord.
3. Power supply requirements
4992A can be powered up in three methods:

AC power supply and power supply with adapter
If the AC power supply is applied, use the accompanying AC-DC adapter. The input of the
adapter should be 100-240V and 50/60Hz AC power.
If the instrument is transported and carried in the bag, the AC-DC adapter must not be
connected to the instrument so as to prevent the instrument from overheating. The AC-DC adapter
has a broad range of voltage input. Ensure that the power supply voltage meets the requirements
of Table 2-1 during operation.
Table 2-1 Power Supply Requirements
Power supply parameter Applicable range
Input voltage
Rated input currency
Work frequency
100V ~ 240VAC
1.7A
50/60Hz
WARNING:
As the battery storage temperature range is -20
℃
to 60
℃
, the
battery must not work continuously in a long time at high
temperature, so as to avoid risks arising from high temperature. It is
recommended to use the adapter to supply power.
