232dtt1795 manual cover page b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 b&b electronics mfg. Co. Inc. P.O. Box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 internet: http://www.Bb-elec.Com sales@bb-elec.Com techsupt@bb.Elec.Com b&b ...
232dtt1795 manual table of contents b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 table of contents chapter 1. General information .................................. 1 i ntroduction ............................................................................
232dtt1795 manual chapter 1 1 b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 chapter 1. General information introduction the 232dtt is a digital thermometer and thermostat which operates through an rs-232 interface. Non-volatile registers hold programmable...
2 chapter 1 232dtt1795 manual b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 thermometer resolution 0.5 ° c (0.9 ° f) temperature conversion time 1 second open collector thermostat outputs low (on) voltages: 1.2vdc @ 100 ma max. High (off) voltages: 40vdc ...
232dtt1795 manual chapter 2 3 b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 chapter 2. 232dtt functions digital thermometer the 232dtt continuously measures temperature, with a new measurement completed once per second. When a read temperature command is ...
4 chapter 2 232dtt1795 manual b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 figure 1. Relay output connection when connecting a mechanical relay coil, or any inductive load to the dtt outputs, a reverse bias diode must be connected across the load to prot...
232dtt1795 manual chapter 3 5 b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 chapter 3. 232dtt data format the dtt uses 9-bit, two’s complement format to represent temperature data. The ninth bit is the sign bit. If this bit is a 0, the temperature is abov...
6 chapter 3 232dtt1795 manual b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 6. To convert to celsius, divide by two. 7. To convert to fahrenheit, multiply the celsius value by 9; divide the result by 5; then add 32. In the basic language, these steps look...
232dtt1795 manual chapter 4 7 b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 chapter 4. 232dtt commands the dtt commands can be issued from a program, or even typed in from a simple terminal program. Two files are included on the 232dtt disk to help learn ...
8 chapter 4 232dtt1795 manual b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 read high command: !0rh arguments: none response: contents of th register in 9 bit two’s complement format (shown in boldface) dec. Example: !0rh ascii example: !0rh2 description:...
232dtt1795 manual chapter 4 9 b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 again. After sending the set high thermostat command, delay for at least 10 ms to allow the dtt to program the register. Set low thermostat command: !0sl arguments: 9 bit, two’s c...
10 chapter 5 232dtt1795 manual b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 chapter 5. Software there is both a dos program (dtt_dos.Exe) and a windows program (232dtt_w.Exe) which allow you to read the current temperature in either fahrenheit or celsius...
232dtt1795 manual appendix a a-1 b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 appendix a. Using simpterm b&b electronics shareware terminal program, simpterm, is included on the dtt floppy disk. Simpterm is a powerful troubleshooting tool which will allo...
232dtt 1795 manual appendix b b-1 b&b electronics -- po box 1040 -- ottawa, il 61350 ph (815) 433-5100 -- fax (815) 434-7094 appendix b. Decimal/ascii table decimal to hex to ascii conversion table dec hex ascii key dec hex ascii dec hex ascii dec hex ascii 0 nul ctrl @ 32 20 sp 64 40 @ 96 60 ' 1 1 ...
