Calibration and Verification Sorensen SGI Series
4-4 M550221-01 Rev U
8. Verify that the unit produces 10% ±0.25% of rated output voltage. If
necessary adjust R90 for 10% of rated output voltage.
9. Repeat the steps above as required to obtain the required accuracy.
10. Remove all connections to the remote analog control connector (J1),
except the jumper between Pins J1-5 and J1-6; ensure that they are
jumpered to enable the output, and allow front panel control.
4.2.3 Resistive-Control Programming Current Sources
(Standard, Non-Isolated Analog Interface Control)
1. Disconnect the AC mains power to the unit.
2. Connect a precision current shunt across the output of the power supply,
and attach a precision meter across the shunt Kelvin terminals. (see
Section 4.1.2).
3. Setup the SGI series unit to operate in remote current programming mode
using resistance by connecting a 5 kΩ (0.1% or better tolerance) resistor,
as shown in Figure 3-14 in Section 3.10. Ensure that Pins J1-5 and J1-6
are jumpered to enable the output.
4. Attach a precision meter across the shunt Kelvin terminals.
5. Apply AC power, turn the unit on, and press “Output On” button to enable
the output (see Section 3.1.1).
6. Adjust R35 so that the measured output current equals 100% rated output
current.
7. Disable AC power to the unit.
8. Setup the SGI series unit to operate in remote voltage programming
mode using resistance by connecting a 5 kΩ (0.1% or better tolerance)
resistor, as shown in Figure 3-16 in Section 3.11. Ensure that Pins J1-5
and J1-6 are jumpered to enable the output.
9. Apply AC power, turn the unit on, and press “Output On” button to enable
the output (see Section 3.1.1).
10. Adjust R33 so that the measured output voltage equals 100% rated
output voltage.
11. Turn off AC power, and remove all connections to the remote analog
control connector (J1), except the jumper between Pins J1-5 and J1-6;
ensure that they are jumpered to enable the output, and allow front panel
control.
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