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- OM-USB-TEMP
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OM-USB-TEMP User's Guide Installing the OM-USB-TEMP
Installing the software
Refer to the OMB-DAQ-2416 Series and OM-USB Series Software User’s Guide for instructions on installing the software on the OMB-DAQ-2416 Series and OM-USB Series Data Acquisition Software CD. This booklet is available in PDF at http://omega.com/manuals .
We recommend that you download the latest Windows Update onto your computer before installing and operating the OM-USB-TEMP.
Installing the OM-USB-TEMP
To connect the OM-USB-TEMP to your system, turn your computer on, and connect the USB cable to a USB port on your computer or to an external USB hub that is connected to your computer. The USB cable provides power and communication to the OM-USB-TEMP.
When you connect the OM-USB-TEMP for the first time, a
Found New Hardware
popup balloon (Windows
XP) or dialog (other Windows versions) opens as the OM-USB-TEMP is detected. When this balloon or dialog closes, the installation is complete. The
USB LED
should flash and then remain lit. This indicates that communication is established between the OM-USB-TEMP and your computer.
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
OM-USB-TEMP, or you may lose data and/or your ability to communicate with the OM-USB-
TEMP.
If the LED turns off
If the LED is lit but then turns off, the computer has lost communication with the OM-USB-TEMP. To restore communication, disconnect the USB cable from the computer, and then reconnect it. This should restore communication, and the LED should turn back on.
Configuring the OM-USB-TEMP
All hardware configuration options on the OM-USB-TEMP are programmable with software. Use InstaCal to set the sensor type for each channel. The configurable options dynamically update according to the selected sensor category. Configuration options are stored on the OM-USB-TEMP 's isolated microcontroller in EEPROM, which is non-volatile memory on the OM-USB-TEMP module. Configuration options are loaded on power up.
Default configuration
The factory default configuration is Disabled. The Disabled mode disconnects the analog inputs from the terminal blocks and internally grounds all of the A/D inputs. This mode also disables each of the current excitation sources.
Warm up
Allow the OM-USB-TEMP to warm up for 30 minutes before taking measurements. This warm up time minimizes thermal drift and achieves the specified rated accuracy of measurements.
For RTD or thermistor measurements, this warm-up time is also required to stabilize the internal current reference.
Calibrating the OM-USB-TEMP
The OM-USB-TEMP is fully calibrated via software. InstaCal prompts you to run its calibration utility when you change from one sensor category to another.
Allow the OM-USB-TEMP to operate for at least 30 minutes before calibrating. This warm up time minimizes thermal drift and achieves the specified rated accuracy of measurements.
10
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Table of contents
- 5 About this User’s Guide
- 5 What you will learn from this user’s guide
- 5 Conventions in this user’s guide
- 5 Where to find more information
- 6 Introducing the OM-USB-Temp
- 6 Overview: OM-USB-TEMP features
- 7 OM-USB-TEMP block diagram
- 7 Software features
- 8 Connecting a OM-USB-TEMP to your computer is easy
- 9 Installing the OM-USB-TEMP
- 9 What comes with your OM-USB-TEMP shipment?
- 9 Hardware
- 9 Additional documentation
- 9 Unpacking the OM-USB-TEMP
- 10 Installing the software
- 10 Installing the OM-USB-TEMP
- 10 Configuring the OM-USB-TEMP
- 10 Calibrating the OM-USB-TEMP
- 11 Sensor Connections
- 11 Screw terminal pin out
- 12 Sensor input terminals (C0H/C0L to C7H/C7L)
- 12 Current excitation output terminals (±I1 to ±I4)
- 13 Four-wire, two sensor common terminals (4W01 to 4W67)
- 13 Two sensor common terminals (IC01 to IC67)
- 13 Ground terminals (GND)
- 13 Power terminals (+5V)
- 13 Digital terminals (DIO0 to DIO7)
- 13 CJC sensors
- 13 Thermocouple connections
- 13 Wiring configuration
- 14 RTD and thermistor connections
- 14 Two-wire configuration
- 15 Three-wire configuration
- 16 Four-wire configuration
- 17 Semiconductor sensor measurements
- 17 Wiring configuration
- 17 Digital I/O connections
- 19 Functional Details
- 19 Thermocouple measurements
- 19 Cold junction compensation (CJC)
- 19 Data linearization
- 19 Open-thermocouple detection (OTD)
- 20 RTD and thermistor measurements
- 20 Data linearization
- 20 USB connector
- 20 Power
- 21 Specifications
- 21 Analog input
- 22 Channel configurations
- 22 Compatible sensors
- 23 Accuracy
- 23 Thermocouple measurement accuracy
- 23 Semiconductor sensor measurement accuracy
- 24 RTD measurement accuracy
- 24 Thermistor measurement accuracy
- 25 Throughput rate
- 25 Digital input/output
- 25 Memory
- 26 Microcontroller
- 26 USB +5V voltage
- 26 Power
- 26 USB specifications
- 27 Current excitation outputs (Ix+)
- 27 Environmental
- 27 Mechanical
- 28 Screw terminal connector type and pin out
- 28 Screw terminal pin out