Instrument Calibration
RTD Electronics
The instrument must compensate for any offsets occurred in the internal
electronic circuitry. A known high precision resistor is inserted, through
software, into the RTD conversion electronic circuitry and a converted
temperature is displayed. If the temperature deviates from the expected value an
offset is computed. Accepting the offset applies it to all future temperature
conversions
The RTD electronics are calibrated at Dynisco Polymer Test prior to shipment
and really should not be changed.
RTD Sensor
Calibration of the RTD Sensors requires one or two thermometers or
equivalent.
The RTD sensor is calibrated at Dynisco Polymer Test prior to shipment.
There should be no need to re calibrate the RTD sensor. However, if there is a
need, please follow the following procedures.
Calibration Steps:
SINGLE
NOTE:
You must have one (SINGLE CAL) or two thermometers or
equivalent to perform this calibration.
1. Press SYS Key and CAL Smart key to enter calibration mode. Select
RTD Sensor in the Calibrate Select mode.
2. The instrument prompts you to select a SINGLE or DOUBLE
procedure. Each procedure requires a thermometer, or two, rated at the
desired calibration temperature. SINGLE uses one temperature
reference to perform a calibration accurate to one temperature setting.
DOUBLE uses two temperature standards to create a linear curve
between the two temperatures. Temperatures falling between the two
standards will be accurate.
1. In the EDIT mode set the temperature on the instrument to the rated
temperature of your thermometer and wait for it to lock in. Enter the
SYS, CALIB mode and select RTD Sensor SINGLE. Insert the
thermometer into the thermometer well. Let the RTD and the
thermometer stabilize in the barrel for 15 minutes. Once the
temperature has stabilized, press STABLE to proceed.
2. Enter the thermometers temperature reading accurate to 1/10 degree
Celsius.
Series 4000 Melt Indexer Operation Manual
Instrument Calibration
60
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