Honeywell UDC2800 Product Manual page 231

Chapter 6 - Input Calibration
Table 6-2: Equipment Needed
Type of Input
Thermocouple
Inputs (Millivolt
Source)
RTD
(Resistance
Thermometer
Device)
Milliampere,
Millivolt and
Volts
231
Equipment Needed
Table below 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.
Equipment Needed
A calibrating device with at least ± 0.02 % accuracy for use as
l
a signal source such as a millivolt source.
Two insulated copper leads for connecting the thermocouple
l
inputs to the millivolt source.
A decade box, with at least ± 0.02 % accuracy, capable of
l
providing stepped resistance values over a minimum range of
0 to 1650 ohms with a resolution of 0.001 ohm.
Three insulated copper leads of equal length for connecting
l
the decade box to the controller.
A calibrating device with at least ± 0.02 % accuracy for use as
l
a signal source.
Two insulated copper leads for connecting the calibrator to
l
the controller.
Place current source at zero before switching ON.
l
Do not switch current sources OFF/ON while connected to the
l
UDC2800 input.