Honeywell DR4500A - Table 7-4 Equipment Needed

Input Calibration - Preliminary Information
Release M DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual 181
April 2017
Equipment needed
Table 7-4 lists the equipment required to calibrate the specific types of inputs listed in the table. You will
need a medium size bladed screwdriver for general use and a small size bladed screwdriver for use with the
screws on the connector plugs.
Table 7-4 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 recorder
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
(Ambient Temperature)
 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 recorder.
Thermocouple Inputs
(Compensated Calibrator)
 A calibrating device with temperature compensation and
±0.02% accuracy for use as a signal source.
 Thermocouple extension wire that corresponds with the
type of thermocouple that will be used with the recorder
input.
RTD (Resistance Thermometer
Device)
 A resistance 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 0.01 ohm.
 Three insulated copper leads for connecting the decade
box to the controller.
Radiamatic, Milliampere, Millivolt, and
Volts Inputs
 A calibrating device with ±0.02% accuracy for use as a
signal source.
 Two insulated copper leads for connecting the calibrator to
the controller.