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Input Calibration - Calibration Set Up and Wiring for PV Inputs

Release M DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual 183

April 2017

Thermocouple input calibration methods

You can calibrate for a thermocouple input using one of three methods:

 using an ice bath,

 using a compensated calibrator, or

 by measuring the ambient temperature at the input terminals and subtracting the voltage contribution

of the input terminal junction.

General set up procedure

Table 7-5 lists the general set up procedure for all methods of calibration. Do this procedure and then refer

to the set up procedure and diagram for your specific input.

Table 7-5 General set up procedure

Step

Action

Set up and connect the calibrator to the input plug for the applicable input circuit board in your

recorder according to the particular input sensor being used. Refer to the following figures for

corresponding set-up diagrams:

 Figure 7-3 Thermocouple inputs using an ice bath

 Figure 7-4 Thermocouple inputs using a compensated calibrator

 Figure 7-5 Thermocouple inputs using the ambient temperature method

 Figure 7-6 RTD (Resistance Thermometer Device) inputs

 Figure 7-7 Radiamatic, mV and Volts (except 0–10 Volts) inputs

 Figure 7-8 0-10 Volts input

 Figure 7-9 4–20 mA inputs

Route leads (for example: copper leads or thermocouple extension wires) through a conduit

hole in the recorder case so that you will be able to close the chart plate.

Close the chart plate after you have completed the applicable calibration set up.

Honeywell DR4500A User Manual

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