PCI-1720 & 1720U User Manual
38
A.3 Unipolar Output Calibration
1.
Select an appropriate output range for the channel to be calibrated.
2.
Set all digital input codes to 0. Then adjust VRn (n = 5, 6, 7, 8
depending on what channel is to be calibrated, see prior page) until
your voltmeter’s reading is 0.000 volts.
3.
Set all digital input codes to 1 (see Unipolar Binary Code Table in
Section 4.3). Now, adjust VRn (n = 1, 2, 3, 4 depending on what
channel is to be calibrated, see prior page) until your voltmeter
shows a reading equal to the output voltage shown in the Unipolar
Binary Code Table in Section 4.3.
4.
Repeat steps 2 and 3 until both of them are satisfied.
A.4 Bipolar Output Calibration
1.
Select an appropriate output range for the channel to be calibrated.
2.
Set all digital input codes to 100000000000. Adjust VRn (n = 5, 6,
7, 8 depending on what channel is to be calibrated, see prior page)
until your voltmeter’s reading is 0.000 volts.
3.
Set all digital input codes to 1 (see Bipolar Binary Code Table in
Section 4.3). Now, adjust VRn (n = 1, 2, 3, 4 depending on what
channel is to be calibrated, see prior page) until your voltmeter
shows a reading equal to the output voltage shown in the Bipolar
Binary Code Table in Section 4.3.
4.
Repeat steps 2 and 3 until both of them are satisfied.
A.5 Current Sink Calibration
1.
Select the 0 ~ +5 V (unipolar) output range for the channel to be
calibrated.
2.
Set all digital input codes to 0. Then adjust VRn (n = 5, 6, 7, 8
depending on what channel is to be calibrated, see prior page) until
your ammeter’s reading is 0.00 mA or 4.00 mA (Depending on
jumper setting JP1 to JP4, see Section 3.1.1).
3.
Set all digital input codes to 1. Now, adjust VRn (n = 1, 2, 3, 4
depending on what channel is to be calibrated, see prior page) until
your ammeter shows a reading equal to 20.00 mA.
4.
Repeat steps 2 and 3 until both of them are satisfied.
