Features
- 10 channels
- Ideal for 4-wire resistance measurements
- RS232 serial interface
- Reduces internal self heating to almost zero
- Minimizes thermal generated EMF voltages
- Neat and simple cabling
The Transmille 8500 10-channel low thermal scanner expands capabilities of the Transmille 8000 series precision
multimeter to provide up to 10 channels for multiple PRT and thermocouple measurements which greatly increase
the versatility of the meter while allowing it to reach its full potential as a complete measurement system.
Each channel of the Transmille 8500 provides very low thermal 4-terminal switching making it ideal for 4-wire
resistance measurements in resistance thermometry and for resistance comparisons.
The use of 4mm terminals make connecting the scanner to UUT's easy, allowing the measurement system to be quickly
re-configured. With the output from the scanner located on the rear panel connections can be routed efficiently
to the rear panel terminals of the 8000 series DMM providing a
neat and simple cabling solution.
Applications of the Transmille 8500 include scanning of both electronic and standard reference cells, standard
resistance comparisons measurements and PRT probe measurements. Special care has been taken in the scanner design
to minimize thermal generated EMF voltages. Thermal voltages have been reduced to less than 150nV by reducing
internal self-heating to almost zero by using a very low power circuit (even the power supply is external), using
latching relays which only need a single pulse of power to set, and using gold plated de-oxygenated copper terminals.
Control for the 8500 scanner is from the Serial RS232 interface or via the front panel control buttons. An LED
indicator shows the selected channel. The internal firmware ensures that two channels can never be selected at
the same and that the switching is break before make.
Specifications for the Transmille 8500 10-Channel Low Thermal Scanner
Number of channels
10
Switching
4 Contact Kelvin switching : 2 Voltage : 2 Current
Maximum Voltage
200 V
Maximum Current
1 A
Connection
Front panel inputs 4mm terminal low thermal gold on copper
Thermal EMF
Typically less than 80nV
Switch Resistance
Less than 0.2 ohms
Relay Type
Latching
Interface
Serial RS232 or LAN (Ethernet)
Internal Temperature
5°C to 35°C (Accuracy ± 0.1°C)
Humidity
10 to 90%RH (Accuracy 5%)
Mains Voltage
200V to 260V AC 50Hz
