Red Lion ITMS - Manual (Page 9)

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STEP 9 SCRATCH PAD MEMORY
STEP 10 VIEW REGISTERS
STEP 11 CALIBRATION
The ITMS is fully calibrated from the factory. Recalibration is recommended every two years. Each
range has its own internal references that are recalled when the range is selected. This allows
independent calibration for each range. All calibration settings are stored in the E
2 PROM. Calibration
may be performed by using SFIMS software or MODBUS commands.
RTD and CJ calibrations are dependent on the millivolt calibration and, therefore, must be performed
after a millivolt calibration has been completed. RTD or CJ calibration may be performed independently
of the millivolt calibration.
Calibration Type: This specifies the type of calibration to be performed.
Cold Junction Calibration:
TC Type: This selects the type of TC that is being used to calibrate the cold junction.
Scale: This selects the scale in which the Thermometer temperature is entered and the Module
temperature is displayed.
Thermometer: Enter the reference thermometer temperature here.
Module: This displays the ITMS process temperature value after a cold junction calibration is
completed to verify the accuracy.
Calibrate: The Calibrate button initiates the calibration process after the appropriate settings are
selected.
Note: Millivolt calibration requires a precision voltage source with an accuracy of 0.025% or better.
Allow the ITMS to warm up for 30 minutes minimum and follow the manufacturer’s warm-up
recommendations for the calibration source. RTD calibration requires a 0.1% precision 300 ohm
resistor. CJ calibration should be performed with a TC of known accuracy of types T, E, J, K, C or N
only. When using SFIMS for calibration, select the type of calibration to be performed, and press the
Calibrate button. Follow the calibration procedures in the software.
The Scratch Pad category can be used to read or write to the Scratch Pad memory locations (41101-
41116). The Scratch Pad locations can be used to store user information.
Data Format: Allows registers to be viewed in decimal or hexadecimal format.
Upload: The Upload button causes SFIMS software to read the Scratch Pad registers from the module.
Download: The Download button causes SFIMS software to write to the Scratch Pad registers in the
module.
Note: Downloading new values to the module Scratch Pad locations overwrites the information that is
currently stored in those registers.
The View Registers category can be used as a method of diagnostics. Use the ITMS Register Table
as a reference of register assignments and data.
First Register: This specifies the first, or only, register to be read in a block.
# of Registers: This is the length of the block to be read. The module supports block read and write
commands up to 16 registers in length.
Data Format: Allows registers to be viewed in decimal or hexadecimal format.
Read: Clicking the Read button causes SFIMS software to read the selected register from the module.
Write: Clicking the Write button causes SFIMS software to write the selected registers to the module.
Note: The Write button overwrites the existing register values, and may change the module setup and
operation.