Measurement Computing DaqBook 2000 Series - Manual (Page 81)

Specifications are subject to change without notice.
DaqBook/2000 and DaqOEM/2000 Series 898695 Specifications 11-3
Thermocouple Input Specifications for DaqBook/2020 Mini-TC Connectors
TC/mV Connectors: 14 Mini-TC connectors, oriented in 2 rows of 7
Inputs: 14 differential TC/mV inputs, open TC detection per channel
TC Types: J, K, T, E, S, R, B, N28, N14; x100 voltage
Input Impedance: 40 M Ω (differential); 20 MΩ (single-ended)
Input Voltage Range: ± 100 mV
Input Bandwidth: 4 kHz
Input Bias Current: 10 nA (typ)
CMRR: -100 db (typ)
Maximum Working Voltage (Signal + Common Mode): ±10V
Over-Voltage Protection: ±40V
Voltage Accuracy: ±(0.2% of the reading + 50 µV)
Temperature Coefficient for Voltage Accuracy: 10ppm for every ˚C outside the range of 0° to 50°C
TC Accuracy: Valid for one year, 18° to 28°C, see the following table.
Temperature Coefficient for Type T: ±0.03°C per °C ambient outside the range of 18 to 28˚C
Minimum Resolution: 0.1˚C for all TC types
TC Accuracy at Measurement Temperature in °C (±°C)
Type Min Max -100 0 100 300 500 700 900 1100 1400
J -200 760 0.8 0.7 0.7 0.8 0.9 0.9 — — —
K -200 1200 0.9 0.8 0.8 0.9 1.1 1.1 1.2 1.3 —
T -200 400 0.9 0.8 0.8 0.8 — — — — —
E -270 650 0.8 0.7 0.7 0.7 0.8 — — — —
S -50 1768 — 3.1 2.4 2.0 2.0 1.9 2.0 2.1 2.1
R -50 1768 — 3.1 2.1 2.0 1.9 1.9 1.7 1.9 2.0
B 50 1780 — — — 4.9 3.2 2.8 2.4 2.3 2.0
N28 -270 400 1.2 0.9 0.9 0.9 — — — — —
N14 0 1300 — 0.9 0.9 0.9 1.1 1.1 1.2 1.3 —
Accuracy conditions:
•
Exclusive of thermocouple errors
•
Exclusive of noise
• VCM = 0