External power is required for data logging via the included ac adaptor.
Data logging can only be done when the OM-USB-5201 is disconnected from the computer. Measurements can be logged to a standard CompactFlash memory card (a 512 MB CompactFlash memory card is included with the OM-USB-5201). The OM-USB-5201 also has data logging capability. When an alarm is activated, the associated digital I/O channel is driven to the output state. The temperature threshold condition to activate each alarm is user programmable. The output of each alarm is software configurable as active high or low. The input to each alarm is any one of the temperature input channels. Each alarm controls an associated digital I/O channel as an alarm output. The OM-USB-5201 features eight independent temperature alarms. The digital I/O channels are software programmable for input or output. Eight independent, TTL-compatible digital I/O channels are provided to monitor TTL-level inputs, communicate with external devices and to generate alarms. Voltage inputs (OM-USB-TC-AI only) are software programmable for ☑0V, ±5V, ☒.5V and ☑.25V ranges. An on-board microprocessor automatically linearizes the thermocouple measurement data. An open thermocouple detection feature lets you detect a broken thermocouple. Thermocouples inputs are software programmable for types J, K, T, E, R, S, B and N. The module has one cold junction compensation (CJC) sensors for the thermocouple measurements. The OM-USB-TC-AI provides eight analog input channels that are configured as four differential temperature inputs and four differential or single-ended voltage inputs.
The OM-USB-TC and OM-USB-5201 provide eight differential thermocouple input channels and have two integrated cold junction compensation (CJC) sensors for thermocouple measurements. All configurable options are software programmable, and the modules are fully software calibrated. No external power supply is required (except for OM-USB-5201 which requires an ac adaptor). These are stand-alone plug-andplay modules which draw power from the USB cable (included). The OM-USB-TC, OM-USB-TC-AI and OM-USB-5201 are USB 2.0 full-speed thermocouple input data acquisition modules (fully compatible with both USB 1.1 and USB 2.0 ports).
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