XT2640 Operating Manual
13 July 2016
Page 106 of 187
20
MEASURING
ELECTRICAL
POWER
TO
AVIONICS
REQUIREMENTS
It is assumed in this section that you are conversant with the general operating methods used in the XT2640 as described in section
12.
Throughout this section, “requirement” is used to describe the avionics industry document defining the testing being performed (see
the list below for those specifically referred to in this document), “equipment” is used to describe the equipment being tested to one
of these requirements, and “supply” is used to describe the power supply (or supplies) being used to provide the power to that
equipment.
The XT2640 may be able to be used for testing equipment to other avionics requirements by using the general methods described in
this section, but this section is specifically tailored for testing performed to the following requirements ‐
RTCA DO‐160E/F/G (Section 16 – Power Input)
Boeing 787B3‐0147
Airbus ABD0100.1.8 (A380) – requires W type channels and option H500.
Airbus ABD0100.1.8.1 (A350) – requires W type channels and option H500.
Note:
It is your responsibility to ensure that any testing you perform to a requirement fully meets that requirement.
Requirement Airbus ABD0100.1.8.1 (A350) specifically requires spectrum analysis rather than harmonic analysis. You
should use the XT2640 spectrum analysis as described in section 12.13
instead of harmonic analysis
for testing ‘harmonics’,
‘inter‐harmonics’ and ‘sub‐harmonics’ to that requirement.
This section describes using the XT2640 during several tests defined by the requirements. If this section does not list a
specific test then this does not indicate that the XT2640 is incapable of assisting you in the execution of that test, it only
indicates that it may be of limited use or that XiTRON has not evaluated the use of the XT2640 to that requirement. For
example, the SCOPE or HISTORY capabilities may be of use in many test steps.
20.1
CONNECTING
THE
XT2640
For all tests carried out to these requirements the XT2640 should be connected using one of the methods described in section 9.
Generally either the 1‐phase or 3‐phase 4‐wire methods will be used for these applications, corresponding to the supply being used
by the equipment.
In some cases you may be providing the equipment with more than one supply. The XT2640 can be configured to use multiple VPAs,
one per supply, with the channels of each VPA connected accordingly. The XT2640 will then monitor each supply independently and
it not required that each supply have the same frequency. This section has been written assuming that only single supply is being
tested.
20.2
CONFIGURING
THE
MEASUREMENTS
MADE
BY
THE
XT2640
The measurement configuration of the XT2640 varies slightly between requirements, and varies with whether an AC or a DC supply
is being used by the equipment.
For certain specific tests the configuration may require to be altered from that shown in this sub‐section; where that is necessary it is
detailed in the specific sub‐section for that test.
The sub‐sections below indicate the settings for the MEAS CONFIG screen for 3‐phase, 1‐phase and DC supplies.
The channels shown below are examples, in practice select the actual channels being used for the supply.
If testing multiple supplies, then configure the MEAS MODE to MULTI‐VPA and configure each VPA for each supply type.
20.2.1
AC
3
‐
PHASE
SUPPLIES
For the A RANGE setting for each channel –
For SD, AD or WD channels it will be as shown above. This will not be shown if using SH, AH or WH channels as no setting is
required.
