Gossen MetraWatt METRAHit 28C light, Operating Instructions Manual, Page: 21 / 26

GOSSEN METRAWATT GMBH 21
Thermocouple Simulation Error in [
°
C]
Thermocouple error is specified in the technical data as ther-
movoltage error:
∆
U.
∆
T error is dependent upon characteris-
tic thermocouple slope.
In consideration of characteristic thermocouple non-linearity,
which also applies to slope (1
st
dT/dU derivation), mathemat-
ically calculated
∆
T error is shown in the following table for all
thermocouple types in the 100
°
C sub-range. The values
shown in the table represent maximum possible error for the
respective sub-range.
All specified error values are increased by 2 K if an internal ref-
erence temperature is used.
If an external reference temperature other than 0
°
C is used,
the sub-range values in the table are adjusted by the amount
of the reference temperature.
Example
Ref. temp. external = 50
°
C
Sub-range 100
…
200
°
C becomes 150
…
250
°
C
For display in
°
F : numeric values in
°
F are increased by a factor
of 1.8.
The
°
F sub-ranges are calculated as follows:
°
F = 32 +
°
C x 1.8
Additional Error for Thermocouple Simulation
Thermocouple
Type
T Error in K for Thermocouple Types at Ref. Temp. 0
°
C
Sub-Range
°
C J L T U K E S R B N
– 200 ...– 100
1.17 0.83 1.52 1.2 1.59 1.03 2.38
– 100 ... 0
0.55 0.56 0.78 0.77 0.73 0.51
≥
-50
°
4.79
≥
-50
°
5.29
1.03
0 ... 100 0.42 0.41 0.52 0.51 0.53 0.35 3.77 3.92 0.77
100 ... 200
0.46 0.45 0.47 0.49 0.6 0.36 2.78 2.75 0.73
200 ... 300 0.51 0.51 0.47 0.46 0.63 0.39 2.47 2.36 0.7
300 ... 400
0.56 0.56 0.49 0.49 0.67 0.43 2.31 2.19 0.71
400 ... 500 0.6 0.6 0.51 0.71 0.48 2.28 2.09 0.74
500 ... 600
0.63 0.62 0.76 0.53 2.24 2.06 4.12 0.78
600 ... 700 0.64 0.63 0.82 0.58 2.23 2.02 3.54 0.82
700 ... 800
0.66 0.64 0.89 0.64 2.21 1.99 3.12 0.87
800 ... 900 0.73 0.66 0.96 0.71 2.18 1.95 2.84 0.93
900 ... 1000
0.83 1.04 0.77 2.16 1.93 2.62 0.99
1000 ... 1100 0.9 1.12 2.16 1.91 2.46 1.05
1100 ... 1200
0.96 1.22 2.17 1.92 2.34 1.13
1200 ... 1300 1.32 2.2 1.94 2.27 1.21
1300 ... 1400
≤
1370
°C:
1.39
2.24 1.99 2.22
1400 ... 1500
2.31 2.04 2.19
1500 ... 1600 2.39 2.12 2.2
1600 ... 1700
2.52 2.23 2.24
1700 ... 1800
≤
1760
°C:
2.76
≤
1760
°C:
2.42
2.33