ABB 600T/621 Differential Pressure Transmitter

Type Data source
621D Product Data Sheet SS 621DGA 1998

Reference Accuracy U(ac)

Low Turndown High Turndown
For spans less than 15:1
± 0.1% of span
For spans from 15:1 to 60:1

Drift (stability) U(d)

± 0.05% of URL for 1 year

Power supply effect U(ps)

± 0.005% of calibrated span per volt change.

Ambient temperature effect U(ac)

For turndown up to 15:1 per 30K

Zero Error Span Error
± 0.13% of reading