TEMP-U2
TEMP-U2 is a member of the extension board family available for the Zahner potentiostats. Generally, the extension boards support data acquisition and process control in parallel to the electrochemical experiments. For details, please refer to the Signal Acquisition manual.
TEMP-U2 enables the acquisition of electrical signals from two thermocouples and two high-impedance voltage input channels. The typical applications of TEMP-U2 are temperature measurements by direct connection of thermocouples and electrochemical potential measurements from connected auxiliary electrodes.
Unless otherwise noted, the TEMP-U2 is delivered pre-configured for two NiCrNi (type K) thermocouples with a temperature range of -200 °C to +1020 °C and two voltage inputs in the range of ±8 V. Both temperature channels are cold junction compensated. All channels are bandwidth-limited using anti-aliasing filters.
Packing List
TEMP-U2 extension card
Installation
If the TEMP-U2 card is purchased together with a basic device, it is already installed in the IM7/x system. Upgrading an IM7/x with TEMP-U2 cards is very easy, as the cards only need to be inserted into the expansion slots provided. See IM7 Chapter for further information.
Note
The TEMP-U2 plug-in card requires an expansion slot with a width of 4TE (corresponds to approx. 20 mm). When upgrading, a new, smaller cover panel may be required for the remaining slots. This can be ordered as an accessory.
Specifications
Thermocouple Inputs |
|
Channels |
2 |
Sockets |
2x miniature, IEC, type K |
Isolation |
non-isolated (insulated thermocouple required) |
Temperature Range |
depending on the thermocouple type standard type K (NiCrNi): -200 °C to +1020 °C |
Cold Junction Compensation |
automatic (internal) range -20 °C to +85 °C (tolerance ±0.7 °C) |
Voltage Inputs |
|
Channels |
2 |
Sockets |
2x BNC |
Input Resistance |
100 kΩ / 1 TΩ, switchable |
Input Range |
±250 mV, ±500 mV, ±1 V, ±2 V, ±4 V, ±8 V (standard), ±16 V switchable |
Offset Voltage |
±0.5 mV, ±0.1% of full scale |
Input Current |
±50 pA max. |
Bandwidth |
300 Hz |
Max. Isolation Voltage |
±12 V |
Configuration
Supported Thermocouples
Type |
Wires |
Temperature Range |
Info |
|---|---|---|---|
K |
NiCr-Ni |
-200 °C to +1020 °C |
standard configuration for TEMP-U2 add-on card |
J |
Fe-CuNi |
-210 °C to +1200 °C |
other configurations on request (reconfiguration only by manufacturer) |
N |
NiCrSi-NiSi |
-200 °C to +1300 °C |
|
E |
NiCr-CuNi |
-200 °C to +1000 °C |
|
T |
Cu-CuNi |
-200 °C to +400 °C |
|
R |
Pt13Rh-Pt |
-50 °C to +1768 °C |
|
S |
Pt10Rh-Pt |
-50 °C to +1768 °C |
|
B |
Pt30Rh-Pt6Rh |
+250 °C to +1820 °C |
Voltage Input Resistance
Many sensors provide a buffered output voltage as a measurement signal. These sensors can be measured with a relatively low input resistance of 100 kΩ. One advantage of this configuration is a low-noise measurement with good mains hum suppression.
In some sensor applications, it may be necessary to configure the voltage inputs with a very high impedance so that the sensor voltage is not affected. The input resistance can be set to >1 TΩ for this purpose.
The input resistance is configured using the first slide switch of the respective dipswitch.
DIP#1 |
Input Resistance |
Information |
|---|---|---|
ON |
100 kΩ |
BNC shield is grounded via 100 kΩ resistor |
OFF |
>1 TΩ |
BNC inner and shield are floating |
Voltage Input Ranges
The voltage for each channel is measured between the central pin and the BNC shielding of the respective channel. The input voltage range of both voltage channels can be configured independently with the corresponding DIP switches (#2, #3, #4):
Input Voltage Range |
DIP#2 |
DIP#3 |
DIP#4 |
|---|---|---|---|
±250 mV |
OFF |
OFF |
OFF |
±500 mV |
OFF |
OFF |
ON |
±1 V |
OFF |
ON |
OFF |
±2 V |
OFF |
ON |
ON |
±4 V |
ON |
OFF |
OFF |
±8 V |
ON |
OFF |
ON |
±16 V |
ON |
ON |
OFF |
disabled |
ON |
ON |
ON |
Example: The picture shows the following DIP switch configuration for a ±1 V input range with a 100 kΩ input resistance:
#1 = ON
#2 = OFF
#3 = ON
#4 = OFF
Control of the TEMP-U2
API
The TEMP-U2 card is supported by the Zahner Link API. The API provides functions for reading the temperature and voltage channels.
The TempuRmuxMio.ipynb example notebook shows how to read temperature and analog inputs, configure asynchronous channels, and record TEMP-U2 data alongside an OCV measurement.