Advantech PCI-1720U Manuale Utente Scaricare il pdf (Pagina 38)

PCI-1720U User Manual 32

A.4 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.

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Advantech PCI-1720U Manuale Utente Pagina 38