Isotech TTI 7 PLUS - Uncertainty of Measurement

Page 8 of 44
TTI-7 Iss.02 – 06/11
UNCERTAINTY OF MEASUREMENT
The Inputs are linearised for the following thermocouple Types B,E,J,K,L,N,R,S,T,U,Au/Pt and in accordance with the following
Standard, NIST 175, ITS 90. Types C & D to ASTM E988, types L and U to DIN 43710.
Reference Junction compensation may be selected for the following modes:-
Automatic: Internal Reference Junction range 0 to +40C
External: Via Pt100 sensor connected to channel A or B range 0 to +100C
OFF: Turns the Reference Junction OFF = 0C
* Apply to readings above 600C
The above figures apply to values with Reference Junction switched off.
Reference Junction uncertainty when used in automatic mode (INT) is better than 0.1C at + 20C with a deviation
of typically 0.01C/C over the range 0 to 100C.
CALIBRATION: Digital security code protected. Default number set 9252
BATTERIES: 1 x Sealed Lead Acid Battery 6V 2.8AH to power digital circuit and display
1 x Sealed Lead acid Battery 6V 1.2 AH to power analogue circuit
1 x Lithium Battery T068AA for data logging memory
Operating time after full charge 8 hours with backlight, 14 hours without
backlight
WORKING 0…50°C rel. humidity less than 90% non condensing
SENSOR
RANGE °C
RESISTANCE
CURRENT
RESOLUTION °C, °F,
K
UNCERTAINTY @
20°C ±5°C
Pt25
-200 to -100
2.5 to 15
1 mA
0.001
0.02 °C
Pt25
-100 to +500
15 to 75
1 mA
0.001
0.01 °C
Pt25
+500 to +670
75 to 115
1 mA
0.001
0.02 °C
Pt100
-200 to -100
10 to 60
0.5 mA
0.001
0.02 °C
Pt100
-100 to +500
60 to 280
0.5 mA
0.001
0.01 °C
Pt100
+500 to +670
280 to 460
0.5 mA
0.001
0.02 °C
TYPE
RANGE
C
RESOLUTION
C F or K
DISPLAY
RESOLUTION
V
UNCERTAINTY
@ 20C  5C 1 YEAR
UNCERTAINTY
@ 20%  5C 60 Days
TEMPERATURE
COEFFICIENT /C
B
+250 to +1820
0.01
1.0
 (0.025% Rdg + 0.006%FS) *
 (0.02% Rdg + 0.006% FS) *
7 ppm Rdg + 6 ppm FS
C
0 to +2315
0.01
1.0
 (0.075% Rdg + 0.005%FS)
 (0.05% Rdg + 0.005% FS)
7 ppm Rdg + 6 ppm FS
D
0 to +2315
0.01
1.0
 (0.075% Rdg + 0.005%FS)
 (0.05% Rdg + 0.005% FS)
7 ppm Rdg + 6 ppm FS
E
-200 to +1000
0.01
1.0
 (0.026% Rdg + 0.004%FS)
 (0.01% Rdg + 0.004% FS)
7 ppm Rdg + 6 ppm FS
J
-210 to +1200
0.01
1.0
 (0.03% Rdg + 0.005%FS)
 (0.008% Rdg + 0.005% FS)
7 ppm Rdg + 6 ppm FS
K
-200 to +1372
0.01
1.0
 (0.035% Rdg + 0.006%FS)
 (0.01% Rdg + 0.006% FS)
7 ppm Rdg + 6 ppm FS
L
-200 to +500
0.01
1.0
 (0.03% Rdg + 0.005%FS)
 (0.008% Rdg + 0.005% FS)
7 ppm Rdg + 6 ppm FS
N
-200 to +1300
0.01
1.0
 (0.035% Rdg + 0.005%FS)
 (0.01% Rdg + 0.005% FS)
7 ppm Rdg + 6 ppm FS
R
-50 to +1768
0.01
1.0
 (0.02% Rdg + 0.015%FS)
 (0.005% Rdg + 0.015% FS)
7 ppm Rdg + 6 ppm FS
S
-50 to +1768
0.01
1.0
 (0.02% Rdg + 0.015%FS)
 (0.005% Rdg + 0.015% FS)
7 ppm Rdg + 6 ppm FS
T
-200 to + 400
0.01
1.0
 (0.025% Rdg + 0.015%FS)
 (0.005% Rdg + 0.015% FS)
7 ppm Rdg + 6 ppm FS
U
-200 to +600
0.01
1.0
 (0.025% Rdg + 0.015%FS)
 (0.005% Rdg + 0.015% FS)
7 ppm Rdg + 6 ppm FS
Au/Pt
0 to +1000
0.01
1.0
 (0.02% Rdg + 0.015%FS)
 (0.005% Rdg + 0.015% FS)
7 ppm Rdg + 6 ppm FS