User manual
2638A 
Users Manual 
 ii 
RTD ...............................................................................................................   1-19 
RTD Temperature Accuracy .....................................................................   1-20 
RTD Measurement Characteristics ...........................................................   1-20 
Thermistor .....................................................................................................   1-20 
Thermistor Temperature Accuracy ...........................................................   1-20 
Thermistor Measurement Characteristics ..................................................   1-21 
Thermocouple ................................................................................................   1-21 
Thermocouple Temperature Accuracy ......................................................   1-21 
Thermocouple Measurement Characteristics ............................................   1-22 
Digital I/O ......................................................................................................   1-22 
Totalizer .........................................................................................................  1-22 
Trigger ...........................................................................................................   1-23 
Alarm Output .................................................................................................   1-23 
2638A-100 Universal Input Module ..................................................................   1-23 
General ..........................................................................................................   1-23 
2  Initial Setup and Configuration ..........................................................  2-1 
Introduction ........................................................................................................  2-1 
Set the Regional Voltage ...................................................................................   2-1 
Connect to Mains Power ....................................................................................   2-3 
Set the Handle Position ......................................................................................   2-4 
Power On and Standby ......................................................................................   2-5 
Warm-Up the Product ........................................................................................   2-6 
Configure the Product ........................................................................................   2-6 
Input Module and Relay Card Installation .........................................................   2-7 
Set Up Security ..................................................................................................   2-10 
3  Input and Channel Configuration .......................................................  3-1 
Introduction ........................................................................................................  3-1 
Input Wiring .......................................................................................................   3-1 
The Universal Input Module..........................................................................   3-1 
Wiring Safety and Considerations .................................................................   3-2 
3-Wire and 4-Wire Sense Input  Configuration ..............................................  3-3 
Input Types and Wiring Diagrams ................................................................   3-5 
Input Wiring Instructions ..............................................................................   3-6 
Channel Configuration .......................................................................................   3-7 
About Channel Numbers ...............................................................................   3-7 
Basic Channel Operations .............................................................................   3-10 
Open the Channel Setup Menu .................................................................   3-10 
Set Channels to ON or OFF ......................................................................   3-11 
Verify a Channel .......................................................................................   3-12 
Zero a Channel ..........................................................................................   3-12 
Copy a Channel .........................................................................................   3-13 
Save or Load a Channel Configuration (Setup File) .................................   3-14 
Reset the Channel and Test Configuration ................................................   3-16 
Analog Channel Configuration (Ch001, Ch101 to Ch322) ...........................   3-16 
Current and Voltage Channels ..................................................................   3-17 
Resistance Channels ..................................................................................   3-18 
Thermocouple Channels ............................................................................   3-19 
Frequency Channels ..................................................................................   3-20 
Thermistor Channels .................................................................................   3-21 
PRT Channels............................................................................................   3-22 
Digital I/O (DIO) Channel Configuration (Ch401) .......................................   3-23 
Totalizer Channel Configuration (Ch402) .....................................................   3-24 










