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NI 9144 User Guide and Specifications
NI 9213 Conversion Speed Control
The NI 9213 can convert at two pre-defined rates, as controlled by the speed control field.
Note
The conversion rate assumes that 18 channels are in the scan list.
NI 9213 Common Mode Error/Status
The error/status field is defined as listed in Table 31 and Table 32.
NI 9213 Scan List
The scan list is a simple list of channels to convert, in order. The NI 9213 has eighteen total
channels that can be measured:
•
<0..15>: sixteen thermocouple channels (always measured in a ±78.125 mV range)
•
16: one cold junction channel (always measured in a ±2.5 V range)
•
17: one auto zero channel (always measured in a ±78.125 mV range)
Table 30.
NI 9213 Conversion Speed Control
Speed Control
Meaning
Conversion Rate
2 (0x02)
High-Accuracy
55 ms/channel (.99 s total)
15 (0x0F)
High-Speed
740 µs/channel (12.32 ms total)
Table 31.
NI 9213 Open Thermocouple Status Code
Bits
Field
31..16
Reserved
15..0
The latest detected open thermocouple status. Each
channel takes one bit.
Table 32.
NI 9213 Common Mode Voltage Error Code
Bits
Field
31..16
Reserved
15..0
The latest detected common mode voltage error. Each
channel takes one bit.
