Chapter 3 Constant Current Test
RIGOL
DP1116A
Performance Verification Manual
3-9
CC Programming and Readback Accuracy
In the following section, the specifications at 16V/10A scale and 32V/5A scale are
tested.
Specification:
Annual Accuracy
[1]
(25
℃
±5
℃
) ±(Output PerOffset)
Programming
0.2% + 10 mA
Readback
0.15% + 5 mA
Note
[1]
: The accuracy parameters are acquired via calibration under 25
℃
after 1-hour
warm-up.
Test Procedures:
1.
Turn off DP1116A. Connect DP1116A, AC power supply, current sampling resistor
(0.01 Ω) and multimeter according to Figure 3-1 and use USB cable to connect
the power supply and PC.
2.
Turn on the AC power supply and set its voltage to 220 V.
Note: the value set in this step should be accordance with the value selected by
the voltage selector in the rear panel of DP1116A.
3.
Measure the programming and readback accuracy when the current is 0 A.
1)
Turn on DP1116A. Send commands via the remote interface to select the
scale to be tested, set the voltage and current of the scale to be tested
(refer to Table 3-4) as well as enable the output. Here, the 16V/10A scale is
taken as an example.
OUTPut:RANGe 16V (command 1)
APPLy 16.8,0 (command 2)
OUTPut:STATe ON (command 3)
2)
Turn on the digital multimeter and select the DC voltage measurement
function. Make sure that the power supply is in CC mode. Read and record
the current reading (U
1
) of the multimeter. Calculate the current I
1
=U
1
/R
M
.
3)
Send the MEASure:CURRent? command via the remote interface. Read and
record the returned current I
2
.
4)
Calculate the programming accuracy: |I
1
-0|;
Calculate the readback accuracy: |I
2
-0|.
4.
Measure the programming and readback accuracy when the current is the rated
output value.
1)
Turn on DP1116A. Send commands via the remote interface to set the
