Agilent Technologies E3633A, E3634A manual Connecting the Load, Output Isolation, Multiple Loads

W a r n i n g

Chapter 7 Tutorial

Connecting the Load

Connecting the Load

Output Isolation

The output of the power supply is isolated from chassis ground. Any output terminal may be grounded, or an external voltage source may be connected between any terminal output and ground. However, output terminals must be kept within ±60 Vdc when metal shorting bars without insulation are used to connect the (+) output to the (+) sense and the (-) output and the (-) sense terminals or ±240 Vdc of ground when metal shorting bars without insulation are either replaced with insulated conductors or they are removed from the terminals so there is no operator access to the output conductors without insulation. A chassis ground terminal is provided on the front panel for convenience.

Multiple Loads

When connecting multiple loads to the power supply, each load should be connected to the output terminals using separate connecting wires. This minimizes mutual coupling effects between loads and takes full advantage of the low output impedance of the power supply. Each pair of wires should be as short as possible and twisted or shielded to reduce lead inductance and noise pick-up. If a shield is used, connect one end to the power supply ground terminal and leave the other end disconnected.

If cabling considerations require the use of distribution terminals that are located remotely from the power supply, connect output terminals to the distribution terminals by a pair of twisted or shielded wires. Connect each load to the distribution terminals separately.

Table 7-1 Wire Rating

AWG	10	12	14	16	18	20	22	24	26	28
Suggested	40	25	20	13	10	7	5	3.5	2.5	1.7
maximum
Current(amps)*
m9/ft	1.00	1.59	2.53	4.02	6.39	10.2	16.1	25.7	40.8	64.9
m9/m	3.3	5.2	8.3	13.2	21.0	33.5	52.8	84.3	133.9	212.9
*Single conductor in free air at 30 °C with insulation
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To satisfy safety requirements, load wires must be heavy enough not to overheat while carrying the short-circuit output current of the power supply.

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