5.2.3 Emergency Stop
Press to Stop. The measurement will cease and halt Voltage to the test leads immediately.
Turn clockwise to release. The device will remain in a safe state.
5.2.4 High Voltage Side Connector
The connection for the High side lead (H) to the test object.
5.2.5 Low Voltage Side Connector
The connection for the Low side lead (x) to the test object.
5.2.6 3 Phase Extension (T-REX)
The TR-MARK III provides this separate plug to connect and control the 3 Phase Voltage
Extension T-REX.
5.2.7 External
This port is used for an external connection to a tap changer dry contact. This port can also
be connected to the optional external control switch TRO-203 (Part No. 30047) for a remote
start of the test sequence. Please see chapter ‘10.1 Hardware’ for details.
Note: If the device is supplied with the option “extended safety circuit”, for instance an
external safety interlock can be connected here. If not, a dummy plug as a jumper is needed.
For details pleas see chapter ‘C Extended Safety Interlock Option (70049-A)’.
5.2.8 Interface
RS232 and USB 2.0. Please see chapter ‘10.1 Hardware’ for Details.
5.2.9 Safety Indicator
Green Light on:
No voltage applied to test leads. System in safe standby mode.
Red Light on:
Indicates there is test voltage on test leads. System is testing.
5.2.10 Display and Touch Panel
The TR-MARK III can be easily manipulated and fully controlled by the touch screen panel. If
preferred, an external mouse can be connected to the USB Port to control the system.
5.2.11 Thermal Printer
Allows you to quickly get your results on paper by using the built-in thermal printer.
90100-2.20 Instruction Manual TR-MARK III 250V
Page 16 of 68
