AMETEK SLH Series RevC - Manual (Page 28)

Installation Sorensen SLH-Series DC High Power Electronic Load
2.2.2 Input Binding Post and Wire Considerations
The output of the device under test (DUT) is connected to the load by bus bars located at
the rear of the load. A major consideration in making input connection is the wire size. The
minimum wire size is required to prevent overheating and to maintain good regulation. It is
recommended that the wires be large enough to limit the voltage drop to less than 0.5V per
lead.
Note: When using Constant Resistance mode, Vsense inputs should be used
to avoid affecting measurements and regulation by cable resistance.
Low Current Testing, below 60A input.
The positive (+) and negative (-) binding posts can be connected to the wires/cables
according to the following guidelines:
Bus Bars
The connection is through the bus bars at the rear of the SLH series load. This is the
same connection as high current testing.
Plug Connectors
This is the most popular way to connect the input of electronic load to the device under
test. It is recommended the load current be less than 20A in this connection since the
current rating of the plug is rated to 20A. The maximum wire gauge should be limited to
AWG14.
Hook Terminals
The hook terminal provides a good contact to the binding post and can be used anytime.
The maximum wire gauge should be limited to AWG10.
Direct Insertion into Binding Posts
This is the most convenient way to connect the load input to the DUT. The maximum wire
gauge AWG14 can be used in this application.
Plug Connectors and Hook Terminals
This method is recommended when input current is greater than 20A.
Plug Connectors and Direct Insertion
This method is also recommended when input current is greater than 20A.
2.2.3 The Power Line Frequency 50/60 Hz Setting
The high accuracy 4-1/2 digit voltage and current meters use dual slope integrated theory to
measure the analog voltage and current signal. The accuracy of the meter is the best when
the integration cycle is synchronized with the power line frequency. (The input line voltage
and line frequency of SLH-series high power load.) There are two power line frequencies
that can be selected, 50Hz or 60Hz.
2-4 M540074-01 Rev C