Constant duty operation

Stable temperature, clean medium, continuous operation on a fixed duty point.

Matching criteria

• Range chosen at 1.5x the working value.
• Output matched to the control input.
• IP rating matched to indoor installation.
• Record the duty point on the drawing so a later replacement is sized the same way.

Recommended models

• A1 — Model A1
• A2 — Model A2
• A3 — Model A3

Cautions

• Do not size the range at the working value exactly.
• Recheck accuracy after a medium change.
• A range that fits today can be too tight after a process change; leave margin.