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222 UDC 3300 Process Controller Product Manual 4/00
Equipment needed
Table 7-2 lists the equipment you will need to calibrate the specific types
of inputs that are listed in the table. You will need a screwdriver to
connect these devices to your controller.
Table 7-2 Equipment Needed
Type of Input Equipment Needed
Thermocouple Inputs
(Ice Bath)
• A calibrating device with ± 0.02 % accuracy for use
as a signal source such as a millivolt source.
• Thermocouple extension wire that corresponds with
the type of thermocouple that will be used with the
controller input.
• Two insulated copper leads for connecting the
thermocouple extension wire from the ice baths to
the precision calibrator.
• Two containers of crushed ice.
Thermocouple Inputs
(Precision Resistor)
• A calibrating device with ± 0.02 % accuracy for use
as a signal source such as a millivolt source.
• Two insulated copper leads for connecting the
calibrator to the controller.
• A precision 500 ohm resistor ± 0.1 % connected
across input #1 terminals 25 (R) and 27 (–) or input
#2 terminals 22 (R) and 24 (–).
RTD (Resistance Thermometer
Device)
• A decade box, with ± 0.02 % accuracy, capable of
providing stepped resistance values over a
minimum range of 0 to 1400 ohms with a resolution
of 0.1 ohm.
• Three insulated copper leads for connecting the
decade box to the controller.
Milliampere, Millivolt, Volts, and
Radiamatic
• A calibrating device with ± 0.02 % accuracy for use
as a signal source.
• Two insulated copper leads for connecting the
calibrator to the controller.
• Place current source at zero before switching ON.
• Do not switch current sources OFF/ON while
connected to the UDC 3300 input.