Input Calibration 
4/07  UDC2500 Universal Digital Controller Product Manual  141 
Thermocouple Inputs Using a Thermocouple Source 
Refer to Figure 5-3 and wire the controller according to the procedure given in Table 
5-5.. 
Table 5-5  Set Up Wiring Procedure for Thermocouple Inputs using 
Thermocouple Source 
Step  Action 
1 
Connect the thermocouple extension wires to the terminals for Input #1 as shown in 
Figure 5-3. 
 
Thermocouple
Source
Thermocouple
Extension Wire
+
_
26
27
+
_
Thermocouple
Source
Thermocouple
Extension Wire
+
_
26
27
+
_
 
Figure 5-3  Wiring Connections for Thermocouple Inputs Using 
Thermocouple Source 
 
RTD Inputs 
Refer to Figure 5-4 and wire the controller according to the procedure given in Table 5-6.  
Table 5-6  Set Up Wiring Procedure for RTD Inputs 
Step  Action 
1 
Connect the copper leads from the calibrator to the Input #1 terminals as shown in 
Figure 5-4. 
 
Decade
Resistance
Box
25R
26+
27-
Copper Leads
Equal Length
Decade
Resistance
Box
25R
26+
27-
Copper Leads
Equal Length
 
Figure 5-4  Wiring Connections for RTD (Resistance Thermometer Device)