Made for multi-channel thermocouple temperature acquisition, this USB data acquisition module provides eight differential thermocouple channels at 24-bit resolution. It accepts type J, K, T, E, R, S, B, and N thermocouples with built-in cold junction compensation, open thermocouple detection, and 8 digital I/O. It draws power from the USB cable and measures up to 2 samples per second.
Made for multi-channel thermocouple temperature acquisition, this USB data acquisition module provides eight differential thermocouple channels at 24-bit resolution. It accepts type J, K, T, E, R, S, B, and N thermocouples with built-in cold junction compensation, open thermocouple detection, and 8 digital I/O. It draws power from the USB cable and measures up to 2 samples per second.
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.
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). These are stand-alone plug-and-play modules which draw power from the USB cable (included). No external power supply is required (except for OM-USB-5201 which requires an ac adaptor). All configurable options are software programmable, and the modules are fully software calibrated.
Thermocouples inputs are software programmable for types J, K, T, E, R, S, B and N. An open thermocouple detection feature lets you detect a broken thermocouple. An on-board microprocessor automatically linearizes the thermocouple measurement data.
Eight independent, TTL-compatible digital I/O channels are provided to monitor TTL-level inputs, communicate with external devices and to generate alarms. The digital I/O channels are software programmable for input or output.
Features
Applications
| A/D converter | Four dual 24-bit sigma delta A/D converters |
| Input isolation | 500 V DC minimum between field wiring and USB interface |
| Number of channels | 8 differential thermocouple inputs |
| Maximum input voltage | Thermocouple inputs; ±25 V (power on), ±40 V (power off) |
| Throughput rate | 2 samples/sec maximum for all active channels |
| Input impedance | Thermocouple inputs; 5 GΩ (power on), 1 MΩ (power off) |
| Input leakage current | Thermocouples inputs; 105 nA maximum (with open thermocouple detection enabled), 30 nA maximum (with open thermocouple detection disabled) |
| Common mode rejection | Thermocouple inputs, 110 dB minimum |
| Warm-up time | 30 minutes maximum |
| Open thermocouple detection | Automatically enabled when a channel is configured for a thermocouple sensor |
| CJC sensor accuracy | ±0.25°C typical, ±0.5°C maximum (15 to 35°C); -1.0 to 0.75°C maximum (0 to 70°C) |
| Type J accuracy, -210 to 1200°C | ±0.71 @ -210°C, ±0.28 @ 0°C, ±0.29 @ 1200°C (typical, °C) |
| Type K accuracy, -210 to 1372°C | ±0.76 @ -210°C, ±0.28 @ 0°C, ±0.39 @ 1372°C (typical, °C) |
| Type T accuracy, -200 to 400°C | ±0.74 @ -200°C, ±0.29 @ 0°C, ±0.21 @ 400°C (typical, °C) |
| Type E accuracy, -200 to 1000°C | ±0.68 @ -200°C, ±0.32 @ 0°C, ±0.24 @ 1000°C (typical, °C) |
| Type R accuracy, -50 to 1768°C | ±0.46 @ -50°C, ±0.19 @ 250°C, ±0.13 @ 1768°C (typical, °C) |
| Type S accuracy, -50 to 1768°C | ±0.44 @ -50°C, ±0.20 @ 250°C, ±0.16 @ 1768°C (typical, °C) |
| Type B accuracy, 250 to 1820°C | ±2.19 @ 250°C, ±0.82 @ 700°C, ±0.47 @ 1820°C (typical, °C) |
| Type N accuracy, -200 to 1300°C | ±0.76 @ -200°C, ±0.28 @ 0°C, ±0.25 @ 1300°C (typical, °C) |
| Number of digital I/O channels | 8 |
| Type | CMOS |
| Configuration | Each DIO bit can be independently configured for input or output; power on reset is input mode |
| Power supply voltage (supplied by USB port) | 4.75 V minimum to 5.25 V maximum |
| Power supply current (supplied by USB port) | <100 mA typical (USB enumeration); 270 mA typical for continuous input with all inputs configured for disabled mode |
| Isolation | 500 V DC minimum measurement system to PC |
| USB device type | USB 2.0 (full-speed) |
| Device compatibility | USB 1.1, USB 2.0 |
| USB cable length | 10' (3 m) maximum |
| Input connections | Screw terminal blocks (accept 16 to 30 AWG wire) |
| Operating temperature | 32 to 122°F (0 to 50°C), 0 to 90% RH non-condensing |
| Storage temperature | -40 to 185°F (-40 to 85°C) |
| Dimensions | 5.0 x 3.5 x 1.4" (127 x 89 x 36 mm) |
| Weight | Weight: 6.4 oz (182 g) |
| A/D converter | Four dual 24-bit sigma delta A/D converters |
| Input isolation | 500 V DC minimum between field wiring and USB interface |
| Number of channels | 8 differential thermocouple inputs |
| Maximum input voltage | Thermocouple inputs; ±25 V (power on), ±40 V (power off) |
| Throughput rate | 2 samples/sec maximum for all active channels |
| Input impedance | Thermocouple inputs; 5 GΩ (power on), 1 MΩ (power off) |
| Input leakage current | Thermocouples inputs; 105 nA maximum (with open thermocouple detection enabled), 30 nA maximum (with open thermocouple detection disabled) |
| Common mode rejection | Thermocouple inputs, 110 dB minimum |
| Warm-up time | 30 minutes maximum |
| Open thermocouple detection | Automatically enabled when a channel is configured for a thermocouple sensor |
| CJC sensor accuracy | ±0.25°C typical, ±0.5°C maximum (15 to 35°C); -1.0 to 0.75°C maximum (0 to 70°C) |
| Type J accuracy, -210 to 1200°C | ±0.71 @ -210°C, ±0.28 @ 0°C, ±0.29 @ 1200°C (typical, °C) |
| Type K accuracy, -210 to 1372°C | ±0.76 @ -210°C, ±0.28 @ 0°C, ±0.39 @ 1372°C (typical, °C) |
| Type T accuracy, -200 to 400°C | ±0.74 @ -200°C, ±0.29 @ 0°C, ±0.21 @ 400°C (typical, °C) |
| Type E accuracy, -200 to 1000°C | ±0.68 @ -200°C, ±0.32 @ 0°C, ±0.24 @ 1000°C (typical, °C) |
| Type R accuracy, -50 to 1768°C | ±0.46 @ -50°C, ±0.19 @ 250°C, ±0.13 @ 1768°C (typical, °C) |
| Type S accuracy, -50 to 1768°C | ±0.44 @ -50°C, ±0.20 @ 250°C, ±0.16 @ 1768°C (typical, °C) |
| Type B accuracy, 250 to 1820°C | ±2.19 @ 250°C, ±0.82 @ 700°C, ±0.47 @ 1820°C (typical, °C) |
| Type N accuracy, -200 to 1300°C | ±0.76 @ -200°C, ±0.28 @ 0°C, ±0.25 @ 1300°C (typical, °C) |
| Number of digital I/O channels | 8 |
| Type | CMOS |
| Configuration | Each DIO bit can be independently configured for input or output; power on reset is input mode |
| Power supply voltage (supplied by USB port) | 4.75 V minimum to 5.25 V maximum |
| Power supply current (supplied by USB port) | <100 mA typical (USB enumeration); 270 mA typical for continuous input with all inputs configured for disabled mode |
| Isolation | 500 V DC minimum measurement system to PC |
| USB device type | USB 2.0 (full-speed) |
| Device compatibility | USB 1.1, USB 2.0 |
| USB cable length | 10' (3 m) maximum |
| Input connections | Screw terminal blocks (accept 16 to 30 AWG wire) |
| Operating temperature | 32 to 122°F (0 to 50°C), 0 to 90% RH non-condensing |
| Storage temperature | -40 to 185°F (-40 to 85°C) |
| Dimensions | 5.0 x 3.5 x 1.4" (127 x 89 x 36 mm) |
| Weight | Weight: 6.4 oz (182 g) |
