8
GOSSEN METRAWATT GMBH
6
Temperature Simulation [
°
C]
Resistance temperature detectors (
RTD) and
Thermocouples
(
TC)
with specified external reference junction temperature
can be simulated.
➭
Select the
°
C calibration function with the rotary switch.
➭
Connect the DUT with the measurement cables as
shown.
➭
unit of measure
°
C or
°
F can be selected with the
ESC
key.
6.1
Temperature Simulation of Resistance Temperature
Detectors – Position
°
C
RTD
.
Resistance temperature detectors are simulated by means of
resistance values.
➭
Selecting sensor type:
Press the
ESC
key until you proceed to the sensor selec-
tion sub-menu.
Select either type Pt100, Pt1000, Ni100 or Ni1000 with
the
#"
keys for the simulation of an RTD. Press the
↵
key to return to the temperature simulation value main
menu.
➭
Setting the temperature simulation value:
The decade (i.e. the position of the digit to be changed) is
selected with the
$ !
keys, and the respective digit is
set with the
#"
keys. Alternatively, you can press the
#"
keys at any entry position until the higher ranking di-
gits are changed as well.
After applying the measuring current it takes a maximum of
30 ms for the calibrator output to adjust to the specified
resistance value.
Incorrect measured values may result in conjunction with
DUTs which do not have a steady measuring current (e.g.
scanned measuring inputs) if measurement has already been
started during setting time. The calibrator cannot be used for
such objects.
6.2
Temperature Simulation of Thermocouples – Position
°
C
TC
.
Thermocouples are simulated by means of voltage. Internal
or external temperature compensation is possible.
➭
Selecting sensor type:
Press the
ESC
key until you proceed to the sensor selec-
tion sub-menu.
Select either type B, E, J, K, L, N, R, S, T or U with the
#"
keys for the simulation of a thermocouple. Press the
↵
key to return to the temperature simulation value main
menu.
➭
Internal or external reference temperature:
Press the
↵
key until
Extern
appears.
Selection is made with the
#"
keys.
intern
: Press the
↵
key to return to the temperature si-
mulation value main menu. The measured internal refer-
nece temperature is indicated with an ’I’ for internal on
the right-hand side at the bottom of the auxiliary display.
extern
: Press the
↵
key to proceed to the temperature
value sub-menu.
➭
Setting the external temperature value:
The last entry position on the right-hand side blinks.
Enter the digits with the
#"
keys. Press the
ESC
key to
move the entry cursor one digit to the left. Alternatively,
you can press the
#"
keys at any entry position until the
higher ranking digits are changed as well.
By pressing the
↵
key to acknowledge the entry cursor at
the last entry position on the right-hand side, you store
the new value and return to the temperature simulation
value main menu. The external reference temperature is
indicated with an ’E’ for external on the right-hand side at
the bottom of the auxiliary display.
Function Description and Applications
10 different types of thermocouples can be selected, and can
be simulated within the temperature ranges specified
by IEC/DIN.
Selection can be made between an internally measured refer-
ence junction temperature, or numeric entry of an external
reference junction temperature within a range of –30 to
+40 °C.
Important Notes Regarding the Reference Temperature
The internal reference temperature is measured continuously
with the help of an integrated temperature sensor.
The reference temperature is generally measured at the ther-
mocouple connector jack for devices under test with a ther-
mocouple measuring input.
The two measurements may yield different results, and differ-
ences are registered as errors during thermocouple simula-
tion. The following methods help to reduce this error:
a)
The device under test is connected to the jacks at the
calibrator with equalizing leads for the thermocouple to
be simulated.
b)
The temperature of the thermocouple connector jack at
the device under test is measured with a precision tem-
perature measuring instrument, and the resulting value is
0123
.
2
NUM
ON
2l
°
C
sensor
pt1000 sele t
°
C
#"
Sensor
#"
$
!
Temperature
Selection
ESC
Simulation Value
Pt1000
↵
ESC
(... 4x)
°
C /
°
F
Pt100/1000
Ni100/1000