B&B Electronics TCDA Manual Download Page 3

Documentation Number TCDA0997 Manual 

B&B Electronics  --  PO Box 1040  --  Ottawa, IL  61350 

PH (815) 433-5100  --  FAX (815) 433-5104

 

Chapter 1: Introduction 

Features 

 

The TCDA is a thermocouple amplifier that can be used with B&B 

Electronics’ Data Acquisition modules to measure temperature using 
a PC. The two channels of the TCDA support K-type thermocouples.  
The amplifier has an output range of 0VDC to +5VDC. The standard 
TCDA can measure temperatures between -50

°

C and 200

°

C. The 

module can be modified at the factory so that a different temperature 
range can be measured. 
 

Packing List 

 

Examine the shipping carton and contents for physical damage. If 

there is any damage, contact B&B Electronics immediately. 
 
The following items should be in the shipping carton: 
 

1.   The TCDA module. 
2.   This instruction module 
3.   3.5” disk 

 
If any of these items are missing, contact B&B Electronics. 
 
 

 

 

Figure 1.1: TCDA module 

Summary of Contents for TCDA

Page 1: ...Designed and Manufactured In Ottawa Illinois USA of domestic and imported parts by B B Electronics Mfg Co Inc 707 Dayton Road P O Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5100 Internet htt...

Page 2: ...CATIONS 2 CHAPTER 2 THERMOCOUPLE OVERVIEW 3 CHAPTER 3 CONNECTIONS 5 OVERVIEW 5 THERMOCOUPLE CONNECTIONS 5 POWER SUPPLY CONNECTIONS 5 OUTPUT CONNECTIONS 5 CHAPTER 4 CALIBRATION 7 OVERVIEW 7 CALIBRATION...

Page 3: ...es The amplifier has an output range of 0VDC to 5VDC The standard TCDA can measure temperatures between 50 C and 200 C The module can be modified at the factory so that a different temperature range c...

Page 4: ...re in your PC 1 Place the disk in drive A 2 Type A and press the ENTER key 3 Type INSTALL and press the ENTER key 4 Follow the instructions given by the program Specifications Size 4 8 x 2 2 x 0 9 Cha...

Page 5: ...l DC voltage based on the temperature of this junction The TCDA amplifies this small voltage to a usable level for A D converters The output of a thermocouple does not have a linear relationship with...

Page 6: ...ilar metals This creates a second unwanted thermocouple at the terminal blocks This unwanted thermocouple is called the cold junction The temperature of this cold junction will affect the results of t...

Page 7: ...2 Make sure that both leads of the thermocouple are connected to the same channel Color coding is used to designate the thermocouple s polarity A K type thermocouple s negative lead is red and the po...

Page 8: ...0VDC to REF for the SDAXX and SPDA modules provide 5V to REF in the modules AGND to AGND Pin 17 and 18 are internally connected in the TCDA to XXXSDAXX and XXXSPDA A D ch A D ch in the ADIO12 module...

Page 9: ...ge is relatively small so it is ignored in the factory calibration process If you require more accurate readings you may want to consider using one of the techniques mentioned in Chapter 2 Calibration...

Page 10: ...e thermocouple in the water as it begins to boil Adjust P1 so that the voltage on DB 25 pin 8 is 3 00VDC adjust P4 so that the voltage on DB 25 pin 9 is 3 00VDC for channel 2 5c If you are using some...

Page 11: ...2 for channel 2 3 4 Plug power supply in 2 5mm power jack and plug supply into wall outlet 5 Adjust P2 so that there is Voff on pin 6 or 7 of U1 adjust P3 so there is Voff on pin 6 or 7 of U3 for chan...

Page 12: ...have a modified TCDA module The following values are used for standard TCDA modules 50 C Temperature 200 C 0VDC Vout 5VDC Vout is measured on DB 25 pin 8 pin 9 for channel 2 resolution 20mV C 0 02V C...

Page 13: ...the example files on your hard drive Place the disk in drive A Type A and press the ENTER key Type INSTALL and press the ENTER key Follow the instructions given by the program After the software inst...

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