Gossen MetraWatt METRAHIT ENERGY TRMS System Multimeter Operating Instructions Manual page 67

tEMP intErn/ExtErn – Select Internal or External Reference Junction
External Reference Junction: Specified Temperature
MEASURE
1nFo   SET
...
SETUP
FUNC
tEMP set: tEMP intern / tempextern
ENTER
FUNC
extern set: 000 .. 0 °C 
ENTER
(internal reference = default setting)
GMC-I Messtechnik GmbH
FUNC
system   tEMP intern
...
ENTER
FUNC

ENTER
Device and Measuring Parameters
67