B&K Precision 1747 - Manual - Manual (Page 27)

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4. Low current calibration
a) Select “I 0” for low current calibration and press the Output On-Off button.
When you initiate the low current calibration, the CV LED lights up and the
power supply will display:
Voltage display: I 0
Current display: ConA
b) Connect a digital ammeter (B&K Precision 5491B or similar instrument) to
the output terminals of the power supply to initiate the low current
calibration procedure. If a digital ammeter is not connected within 30
seconds, the power supply will abandon the current calibration procedure
and return to the Calibration menu.
The CV LED indicator will go off and the CC LED indicator will light on. The
power supply will then display:
Voltage display: I 0
Current display: hex number
A hexadecimal number between 0 and FFFFh is shown on the current
display.
c) Use the current coarse and fine knobs to adjust the value displayed by the
power supply until the ammeter indicates the closest value to 1mA.
d) Press the Output On-Off button to finish the calibration.
While performing the low current calibration, the current display will show
Adc. After the low current calibration, the message Done is shown on the
current display for 1 sec. Then the power supply returns to the Calibration
menu.