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National Instruments Corp.
23
NI 9214 Operating Instructions and Specifications
Common-mode rejection ratio
High-resol
u
tion mode (at DC and 50–60 Hz)
Channel-to-COM ................. 100 dB
COM-to-earth gro
u
nd .......... 170 dB
High-speed mode (at 0–60 Hz)
Channel-to-COM ................. 70 dB
COM-to-earth gro
u
nd .......... 120 dB
Thermoco
u
ple signal inp
u
t bandwidth
High-resol
u
tion mode................. 14.4 Hz
High-speed mode........................ 80 Hz
Open thermoco
u
ple settling time
when switching OTD on/off ............. 6 s
High-resol
u
tion noise rejection
(at 50 and 60 Hz) .............................. 65 dB
Overvoltage protection ..................... ±30 V between any
two inp
u
ts
Differential inp
u
t impedance ............ 20 M
NI_9214.fm Page 23 Monday, November 1, 2010 9:52 AM