K-TCSpecification

K-TC: overview and specifications

Updated

Find out what K-TC does, choose how you will run it and check the full specification before you wire it up.

The K-TC series has five parts:

  • This overview and specification
  • The connector pinouts
  • Configuring channels in K-CAL
  • Standalone logging with K-Log
  • Calibration and firmware

To connect and power any K-Series module, see K-Series: connecting and powering modules.

What K-TC is

K-TC is a stackable thermocouple data logger from the Influx Technology K-Series instrumentation range. It measures type K, J and T thermocouples with cold junction compensation, in 8, 16 and 32-channel versions.

It works with every Influx Technology data logger and with any device that reads CAN through a DBC file, including third-party loggers. Its CAN settings, calibration and sampling rates are stored in the module and kept when the power is off.

The K-TC8, K-TC16 and K-TC32 modules side by side; each front panel carries rows of eight green miniature thermocouple sockets labelled TC0 upwards
K-TC8, K-TC16 and K-TC32. The channel count sets the height of the enclosure.

Three ways to run it

The K-TC gets its data out in three ways. The first two run at the same time.

Thermocouples in, three routes out K-TC · DATA ROUTES Thermocouples in, three routes out Thermocouplestype K, J or TK-TC8, 16 or 32These two run at the same timeLog standaloneK-LogInternal storage8 GB eMMCTransmit on CANDBC from K-CALData loggerREBEL, REXGEN, othersView liveUSB Micro-BK-CALoscilloscopeFor set-up at the deskStandalone logging to the eMMC and CAN transmission run at the same time. Over CAN, the DBC file exported from K-CAL lets REBEL, REXGEN or a third-party logger decode the readings.
Standalone logging and CAN transmission run at the same time. The live view is for setup at the desk.

Specifications

These figures are for the current K-TC (K-TC 2.0). Thermocouples are not included. K-TC accepts standard miniature type K, J and T connectors, so existing probes work.

K-TC technical specifications
Parameter Value
Thermocouple types K, J and T, miniature connectors
Channels 8 (K-TC8), 16 (K-TC16) or 32 (K-TC32), in groups of 8. The groups are isolated from each other. The channels within a group are galvanically connected.
Measurement range −200 °C to +1200 °C, cold junction compensated
Accuracy ±1 °C across the range
Resolution 0.001 °C
Sampling rate Up to 20 Hz per channel
Maximum applied voltage ±3.3 V on a thermocouple input
Storage 8 GB eMMC, written by K-Log for standalone logging
CAN CAN 2.0, up to 1 Mbit/s, isolated
PC interface USB 2.0 Micro-B, isolated
Configuration K-CAL over CAN or USB for channels, CAN output and calibration. K-Log over USB for standalone logging. Settings are stored in the module.
Supply voltage 4.5 to 31 V DC, isolated
Current, running 120 mA (K-TC8), 140 mA (K-TC16), 200 mA (K-TC32), at 12 V
Current, standby 24 mA (K-TC8), 25 mA (K-TC16), 30 mA (K-TC32), at 12 V, in power-down standby
Sleep WakeOnCAN. The module goes into deep sleep and wakes on CAN
Peak isolation, CAN 780 V, three-wire CAN bus, from all other modules and power supplies
Peak isolation, USB 840 V, four-wire USB bus, from all other modules and power supplies
Peak isolation, power 560 V, two-wire power module, from all other modules and power supplies
Enclosure ABS, stackable and daisy-chainable
Ingress protection IP65 with all thermocouples connected, IP40 open
Dimensions 115 × 105 mm footprint. Height 56 mm (K-TC8), 79 mm (K-TC16), 149 mm (K-TC32)
Weight 450 g (K-TC8), 570 g (K-TC16), 900 g (K-TC32)
Operating temperature −40 °C to +85 °C
Humidity Up to 90%
Part numbers INF2204.02P (8 channel), INF2205P (16 channel), INF2206P (32 channel)

Download the K-TC spec sheet (PDF)

Isolation

Functional galvanic isolation separates the USB, CAN, power and thermocouple boards, to keep ground loops on the rig out of the measurement. Each group of 8 thermocouple channels is isolated from the other groups. The channels inside one group share a connection. The specification table gives the peak figure for each barrier.

Isolation inside a K-TC32 K-TC · ISOLATION Isolation inside a K-TC32 K-TC32Thermocouple inputsGroup 1TC 0 to 7channels connectedGroup 2TC 8 to 15channels connectedGroup 3TC 16 to 23channels connectedGroup 4TC 24 to 31channels connectedCANCAN in and CAN outUSBUSB 2.0 Micro-BPowersupply, pins 9 and 5Galvanic isolation barrierThermocouple inputK-TC8 has one group of 8 channels and K-TC16 two; K-TC32, drawn here, has four. Each group is isolated from the other groups and from the CAN, USB and power boards; the peak isolation figures are in the specification table.
Isolation barriers between the thermocouple groups, CAN, USB and power.

Power and USB

Power the module through pin 9 (supply) and pin 5 (power ground) of either 9-way D-Sub CAN connector. For the pins, see K-TC: connector pinouts.

For the ways to power a module from a REBEL, from a bench supply or in a daisy chain, see K-Series: connecting and powering modules.

Software

Two free Windows applications work with K-TC:

K-CAL
Sets the CAN bit rate, CAN IDs, sampling rates and thermocouple types, shows live data on its oscilloscope, calibrates the channels, updates the firmware and exports the DBC file. It can configure up to five K-Series modules at once. See K-CAL.
K-Log
Sets up standalone logging over USB and downloads and exports the logs. Earlier releases called it TC Logger.

For installers and drivers, see Software downloads: installers, drivers and firmware.

Earlier K-TC modules

The first-generation K-TC (INF2204, INF2205, INF2206) had no internal storage and was configured over CAN only, in K-CAL. If you still use one, these figures differ from the current module:

First-generation K-TC: figures that differ
Parameter First-generation K-TC
Supply voltage 4.5 to 36 V DC
Current, running 150 to 350 mA at 12 V
Current, standby About 3 mA at 12 V in power-down standby
Storage None, so no standalone logging
Configuration Over CAN with K-CAL only

Measurement range, accuracy, sampling rate, dimensions, weight and operating temperature are the same as the current module.

Support

If you have a problem you cannot solve, contact technical support. Calibration and certification are available on demand. Ask through the contact page.

Next: K-TC: connector pinouts.

Products in this guide

K-TC

Thermocouple data logger

View K-TC Ask an engineer

Still stuck?

Our engineers answer support questions on every Influx Technology product.