Gossen MetraWatt METRAHit 28C light - Page 9

GOSSEN METRAWATT GMBH 9
entered to t he calibrator as a reference temperature. The cali-
brator and the device under test are connected with copper
wire.
Otherwise, the external reference temperature is entered in all
cases where temperature measurement at the device under
test is accomplished by means of a thermostatic reference
junction (end of the thermocouple equalizing lead).
Attention!
!
In this operating mode interference voltages must not
be applied to the calibrator jacks.
In the event of operating errors, such as the short-
term application of a high interference voltage, the in-
strument/calibrator is protected by a replaceable
fuse F3, see chapter 12.3.
Example ad a) Internal Reference Junction
Example ad b) External Reference Junction
Selecting Sensor Type, Setting the Temperature Simulation Value
and Entering the External Reference Temperature
Device to be calibrated
Terminal Block
Equalizing Lead
CALIBRATOR
–
+
Output
Device to be calibrated
Terminal Block
Copper Wire
Temperature
measurement, e.g.
via multimeter with
temperature sensor
CALIBRATOR
–
+
Output
l:0120.2
ON
E. 030.0
°C
sens0r
lselet
°C
#"
°C / °F
ESC
B, E, J, K, L
N, R, S, T, U
TC
NUM
2L
TC
e=tern
temp
ref
E:000.0
temp
ref
#"
intern
extern
°C
#"
$ !
External
Temperature Value
↵
intern
↵
↵
ESC
↵
ESC
↵
ESC
(... 4x)
(... 4x)
(... 2x)
#"
$ !
Temperature
Simulation Value
Sensor
Selection