Omega OM-USB-5203, User Manual

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Page 3: ...itation output terminals I1 to I4 10 Four wire two sensor common terminals 4W01 to 4W67 10 Two sensor common terminals IC01 to IC67 10 Digital terminals DIO0 to DIO7 10 Power output terminals 5V 10 Gr...

Page 4: ...Specifications 21 Analog input 21 Channel configurations 21 Compatible sensors 22 Accuracy 22 Thermocouple measurement accuracy 22 Semiconductor sensor measurement accuracy 23 RTD measurement accuracy...

Page 5: ...ts present information to help you avoid injuring yourself and others damaging your hardware or losing your data bold text Bold text is used for the names of objects on a screen such as buttons text b...

Page 6: ...d microprocessor automatically linearizes the measurement data according to the sensor category The OM USB 5203 features eight independent temperature alarms Each alarm controls an associated digital...

Page 7: ...and time Data is stored on the memory card in binary files After logging measurements you can transfer the files to your computer You can use InstaCal to convert the files to csv format for use in Mi...

Page 8: ...red A green Status LED turns on when power is applied When you connect the device for the first time a Found New Hardware dialog opens when the operating system detects the device The dialog closes af...

Page 9: ...e bottom edge Each row has 26 connections Between each bank of screw terminals are two integrated CJC sensors used for thermocouple measurements Signals are identified in Figure 2 Figure 2 OM USB 5203...

Page 10: ...channel 2 and channel 3 I3 is the current excitation source for channel 4 and channel 5 I4 is the current excitation source for channel 6 and channel 7 Four wire two sensor common terminals 4W01 to 4W...

Page 11: ...und is maintained When thermocouples are attached to conductive surfaces the voltage differential between multiple thermocouples must remain within 1 4 V For best results use insulated or ungrounded t...

Page 12: ...ons to the sensor With this method the two wires that provide the RTD sensor with its excitation current also measure the voltage across the sensor Since RTDs exhibit a low nominal resistance measurem...

Page 13: ...ensation For accurate three wire compensation the individual lead resistances connected to the I pins must be of equal resistance value Four wire configuration With a four wire configuration connect t...

Page 14: ...semiconductor sensor is small when compared to thermocouples and RTDs However semiconductor sensors can be accurate inexpensive and easy to interface with other electronics for display and control The...

Page 15: ...igital I O and conductive thermocouples the thermocouples are no longer isolated In this case thermocouples must not be connected to any conductive surfaces that may be referenced to earth ground For...

Page 16: ...ware algorithm automatically corrects for the additional thermocouples created at the terminal blocks by subtracting the calculated cold junction voltage from the analog input s thermocouple voltage m...

Page 17: ...age by the current excitation level Ix source The value of the Ix source is stored in local memory Once the resistance value is calculated the value is linearized in order to convert it to a temperatu...

Page 18: ...b Blinks continuously Data is being transferred Upon connection the LED blinks a few times and then remain on indicates a successful installation Blinks several times Initial communication is establis...

Page 19: ...JC enabled 512 000 000 1 1 1 6 4 8 512 000 000 1 8 1 6 4 8 Data logging button Use the data logging button to end a data logging session The data logging button is also used to start recording data wh...

Page 20: ...the files to your computer by reconnecting the OM USB 5203 to a USB port on your computer or by removing the CompactFlash card from the OM USB 5203 and using a card reader connected to your computer...

Page 21: ...bits No missing codes 24 bits Input coupling DC Warm up time 30 minutes min Open thermocouple detect Automatically enabled when the channel pair is configured for thermocouple sensor The maximum open...

Page 22: ...RTD 100 PT DIN 43760 0 00385 ohms ohm C 100 PT SAMA 0 003911 ohms ohm C 100 PT ITS 90 IEC751 0 0038505 ohms ohm C Thermistor Standard 2 252 through 30 000 Semiconductor IC LM35 TMP35 or equivalent Acc...

Page 23: ...Accuracy Error C LM35 TMP35 or equivalent 40 to 150 0 50 RTD measurement accuracy The error shown in Table 6 below does not include errors of the sensor itself The sensor linearization is performed u...

Page 24: ...0 05 5000 35 to120 0 05 10000 25 to120 0 05 30000 10 to120 0 05 Typical resistance values at various temperatures for supported thermistors are shown in Table 8 below The device cannot measure resist...

Page 25: ...ter Specification Digital type CMOS Number of I O 8 DIO0 through DIO7 Configuration Independently configured for input or output Power on reset is input mode unless bit is configured for alarm Pull up...

Page 26: ...1 Alarm when input temperature T1 reset alarm when input temperature goes below T2 Alarm when input temperature T1 Alarm when input temperature T1 reset alarm when input temperature goes above T2 Alar...

Page 27: ...p methods Stop on button press To stop logging press and hold the button until the LED turns off The device caches logged data in volatile memory prior to writing to memory card When logging always us...

Page 28: ...e device which includes up to 10 mA for the status LED Note 4 Self powered hub refers to a USB hub with an external power supply Self powered hubs allow a connected USB device to draw up to 500 mA Thi...

Page 29: ...Specification Configuration 4 dedicated pairs Current excitation output AI channel I1 I1 CH0 CH1 I2 I2 CH2 CH3 I3 I3 CH4 CH5 I4 I4 CH6 CH7 Current excitation output ranges Thermistor 10 A typ RTD 210...

Page 30: ...d 35 NC No connection 10 I1 CH0 CH1 current excitation return 36 I4 CH6 CH7 current excitation source CJC sensor CJC sensor 11 I2 CH2 CH3 current excitation source 37 I3 CH4 CH5 current excitation ret...

Page 31: ...y OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limite...

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