Ideal for multi-sensor temperature acquisition, this USB data acquisition module provides eight differential channels at 24-bit resolution. It is software programmable for type J, K, T, E, R, S, B, N thermocouples, Pt100 RTDs, thermistors, or semiconductor sensors, with built-in CJC, open circuit detection, and 8 digital I/O. It draws USB power and measures up to 2 samples per second.
Ideal for multi-sensor temperature acquisition, this USB data acquisition module provides eight differential channels at 24-bit resolution. It is software programmable for type J, K, T, E, R, S, B, N thermocouples, Pt100 RTDs, thermistors, or semiconductor sensors, with built-in CJC, open circuit detection, and 8 digital I/O. It draws USB power and measures up to 2 samples per second.
The OM-USB-TEMP and OM-USB-5203 provide eight differential temperature input channels. The OM-USB-TEMP-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-TEMP, OM-USB-TEMP-AI and OM-USB-5203 are USB 2.0 full speed temperature input data acquisition modules (fully compatible with both USB 1.1 and USB 2.0 ports). These are plug-and-play modules which draw power from the USB cable–no external power supply is required (except for OM-USB-5203 which requires an ac adaptor). All configurable options are software programmable, and the modules are fully software calibrated.
Temperature inputs are software programmable for different sensor types including type J, K, T, E, R, S, B, N thermocouples, 2, 3 or 4-wire Pt100 RTDs, 2, 3 or 4-wire thermistors and semi-conductor sensors and are configured in blocks of two channels. A different type of sensor (thermocouple, RTD, thermistor, semiconductor) can be connected to each block of two channels (both channels must be the same type).
These modules have integrated cold junction compensation (CJC), linearization and open circuit detection for thermocouple measurements. 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 temperature inputs |
| Thermocouple input | Software programmable for type J, K, T, E, R, S, B, N |
| Pt100 RTD input | 2, 3 or 4-wire DIN 43760, a = 0.00385, SAMA, a = 0.003911, ITS-90/IEC751, a = 0.0038505 |
| Thermistor input | 2, 3 or 4-wire standard 2252 through 30,000 Ω |
| Semiconductor sensor | TMP36 or equivalent |
| Maximum input voltage | Temperature inputs; ±25 V (power on), ±40 V (power off) |
| Throughput rate | 2 samples/sec maximum for all active channels |
| Input impedance | Temperature inputs; 5 GΩ (power on), 1 MΩ (power off) |
| Open thermocouple detection | Automatically enabled when a channel is configured for a thermocouple sensor |
| Warm-up time | 30 minutes maximum |
| 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) |
| Semiconductor sensor accuracy | TMP36 or equivalent, -40 to 302°F (-40 to 150°C), maximum error ±0.50°C |
| Thermistor measurement accuracy | 2252 Ω, 3000 Ω: -40 to 248°F (-40 to 120°C) ±0.05°C; 5000 Ω: -31 to 248°F (-35 to 120°C) ±0.05°C; 10000 Ω: -13 to 248°F (-25 to 120°C) ±0.05°C; 30000 Ω: 14 to 248°F (-10 to 120°C) ±0.05°C |
| Number of digital I/O channels | 8 |
| Type | CMOS |
| Configuration | Each DI/O 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 |
| 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 temperature inputs |
| Thermocouple input | Software programmable for type J, K, T, E, R, S, B, N |
| Pt100 RTD input | 2, 3 or 4-wire DIN 43760, a = 0.00385, SAMA, a = 0.003911, ITS-90/IEC751, a = 0.0038505 |
| Thermistor input | 2, 3 or 4-wire standard 2252 through 30,000 Ω |
| Semiconductor sensor | TMP36 or equivalent |
| Maximum input voltage | Temperature inputs; ±25 V (power on), ±40 V (power off) |
| Throughput rate | 2 samples/sec maximum for all active channels |
| Input impedance | Temperature inputs; 5 GΩ (power on), 1 MΩ (power off) |
| Open thermocouple detection | Automatically enabled when a channel is configured for a thermocouple sensor |
| Warm-up time | 30 minutes maximum |
| 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) |
| Semiconductor sensor accuracy | TMP36 or equivalent, -40 to 302°F (-40 to 150°C), maximum error ±0.50°C |
| Thermistor measurement accuracy | 2252 Ω, 3000 Ω: -40 to 248°F (-40 to 120°C) ±0.05°C; 5000 Ω: -31 to 248°F (-35 to 120°C) ±0.05°C; 10000 Ω: -13 to 248°F (-25 to 120°C) ±0.05°C; 30000 Ω: 14 to 248°F (-10 to 120°C) ±0.05°C |
| Number of digital I/O channels | 8 |
| Type | CMOS |
| Configuration | Each DI/O 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 |
| 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) |
