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SECTION 3: OPERATION
3.1 Control Capability
The capabilities available in a specific unit are dependent upon the hardware options
specified when the instrument is ordered. Refer to Appendix E for the decoding of the
instrument model number. Current proportioning control cannot be implemented if a
current output was not ordered. The available output types and quantity of each are as
follows:
Type of Output Quantity Available
• SPDT mechanical relay output Up to three
• SSR Driver Up to three
• mADC current output Up to two
3.2 Control Responses
Each instrument may be configured to provide three mode proportional control.
Proportional control is provided with Proportional Band, Integration, and Derivative
responses. The PID parameters are defined as follows:
Out 1 Out2
P (Proportional) Proportional Band Pb1 Pb2
I (integration) Automatic Reset ArSt ArSt
D (Derivative) Rate rAtE rAtE
Manual Reset is provided for use in lieu of, or in conjunction with automatic reset. A
cycle time adjustment parameter is provided for use with each time proportioning
control output.
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