Specifica ons
All specifica ons are subject to change without no ce.
Typical for 0 °C to 50 °C unless otherwise specified.
Thermocouple input
Table 1. Thermocouple input specifica ons
Parameter
Condi on
Specifica on
Number of
channels
16 thermocouple channels
1 internal auto zero channel
1 internal cold-junc on compensa on channel
ADC resolu on
24 bits
Type of ADC
Delta-Sigma
Sampling mode
Scanned
Voltage
measurement
range
±78.125 mV
Temperature
measurement
ranges
Works over temperature ranges defined by NIST
(J, K, T, E, N, B, R, S thermocouple types)
Timing mode
Automa cally set
for either high-
resolu on or high-
speed mode based
on the requested
scan rate,
regardless of the
number of
channels.
High resolu on: requested scan rate is ≤1 Hz
High-speed: requested scan rate is >1 Hz
Timing mode
High-resolu on
Conversion Time (per channel): 55 ms
Sample Rate (all channels): 1 S/s
High-speed
Conversion Time (per channel): 740 µs
Sample Rate: 75 S/s/ch
Common-mode
voltage range
Channel-to-COM: ±1.2 V min
COM-to-earth ground: ±250 V
Common-mode
rejec on ra o
(CMMR)
High-resolu on
mode at DC
and 50 to 60 Hz
Channel-to-COM: 100 dB
COM-to-earth ground: >170 dB
High-speed mode
at 0 to 60 Hz
Channel-to-COM: 70 dB
COM-to-earth ground: >150 dB
Input bandwidth
High-resolu on
mode
14.4 Hz
High-speed mode
78 Hz
High-resolu on
noise rejec on
50 Hz and 60 Hz
60 dB
Overvoltage
protec on
±30 V between any two inputs
WebDAQ 316 User's Guide
page 19
