Honeywell UDC2500 manual Preliminary Information, Disconnect the Field Wiring

Input Calibration

Table 5-2 Voltage and Milliamp Equivalents for Input 2 Range Values

Sensor Type	PV Input Range
Linear
Milliamps	4 to 20 mA
	0 to 20 mA
Volts	1 to	5 Volts
	0 to	5 Volts
	0 to	2 Volts

Range Values

0 %	100 %
4.00 mA	20.00 mA
0.00 mA	20.00 mA
1.00 Volts	5.00 Volts
0.00 Volts	5.00 Volts
0.00 Volts	2.00 Volts

5.3 Preliminary Information

Disconnect the Field Wiring

Tag and disconnect any field wiring connected to the input (#1 or #2) terminals on the rear of the controller.

Input 1

Connections

R	25 R
+
	26 +
_
	27 –

Input 1

Input 2

Connections

mA+	22 mA+
Volt+
	23 V+
_
	24 –

Input 2

XXXX

Figure 5-1 Input 1 and Input 2 Wiring Terminals

Equipment Needed

Table 5-3lists 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 5-3 Equipment Needed

Type of Input

Equipment Needed

Thermocouple Inputs (Ice Bath)

•A calibrating device with at least ± 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 mV source.

•Two containers of crushed ice.

Thermocouple Inputs (T/C Source)

•A calibrating device with at least ± 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 controller input.

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