5

STEP 3 PROGRAMMING - Getting Started

Run RLCPro by double-clicking the icon, or use the start menu.

Use the FILE pull-down menu

to select a NEW file.

You will be prompted to

select the proper device,

and then the model.

STEP 4 PROGRAMMING THE INPUT

The ITMS receives a temperature sensor input, converts it to a raw digital value, and stores this number in the ADC Value (register 40001). This number

is scaled into degrees, and a programmable Offset Value (register 40012), that can be used for sensor correction, is applied. The result is stored as the

Temperature Value (register 40002). It is also stored in the IEEE 754 Standard 32-bit floating decimal format (register 40003 and 40004). The non-scaled

ADC, the scaled Process Temperature Value, or the Floating Point Value may be accessed for the purpose of monitoring the input level.

INPUT

SIGNAL

Register 40001

ADC READING

INTERNAL

MATH

OFFSET

PROCESS

TEMPERATURE

VALUE

LO Order Byte

HI Order Byte

IEEE STANDARD 754

FLOATING DECIMAL POINT

Register 40003

Register 40004

Register

40012

Register 40002

Input Type: Select the proper input type from the pull down menu.

Scale: Select Fahrenheit or Celsius. In linear millivolt or resistance modes, this has no

effect.

Resolution: For thermocouple, RTD, or linear resistance modes, low resolution selects

whole degrees or ohms. In these same modes, high resolution selects tenth of degrees

or ohms. In linear mV mode, low selects hundredths of mV, and high selects

thousandths of mV.

Offset: The Offset value can be used as a sensor correction value.

Filter Response: The Filter Response is a time constant, in tenth of second increments,

that is used to stabilize an erratic input. The Process Value stabilizes to 99% of the final

value within approximately 5 time constants. A value of ‘0’ disables digital filtering.

Filter Band: Filter Band is a value expressed in Temperature (degrees or tenths) units.

When a fluctuating signal remains within the band value, the Digital Filter is active,

and therefore stabilizes the Process Temperature Value. When a fluctuating signal

exceeds the Filter Band value, the Digital Filter is momentarily disabled to allow for

quick response to valid process changes. Once the signal variation is less than the Filter

Band value, the Digital Filter is reactivated.