Service and Maintenance 8
Constant Current (CC) Verifications
E364xA User’s and Service Guide 205
3 Program the output voltage to the full- scale rated voltage
(8.0 V)
[1]
and output current to 0 A by sending the
following commands:
VOLT 8 (E3646A model)
CURR 0
4 Divide the voltage drop (DVM reading) across the current
monitoring resistor (R
M
) by its resistance to convert to
amperes and record this value (I
0
). This value should be
within the limit of (0 A ±10 mA). Also, note that the CC,
Adrs, Limit, 8V, OVP1, OVP2, OUT1, and Rmt annunciators are
turned on.
5 Read back the output current over the remote interface by
sending the MEAS:CURR? command:
6 Record the value displayed on the controller. This value
should be within the limit of I
0
±5 mA for output1 or
I
0
±10 mA for output2.
7 Program the output current to the full- scale rated value
(3 A)
[1]
by sending the following command:
CURR 3.0 (E3646A model)
8 Divide the voltage drop (DVM reading) across the current
monitoring resistor (R
M
) by its resistance to convert to
amperes and record this value (I
O
). This value should be
within the limit of:
9 Read back the output current over the remote interface by
sending the MEAS:CURR? command:
[1] For the E3646A model. For other models, refer to Tabl e 8 -5 .
E3646A E3647A E3648A E3649A
3 A ±16 mA 0.8 A ±11.6 mA 5 A ±20 mA 1.4 A ±12.8 mA
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