Chapter 5 Specifications; Analog Input; Channel Configuration - Measurement Computing USB-5200 Series User Manual

Specifications
All specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Analog input

Parameter
A/D converters
Number of channels
Input isolation

Channel configuration

Differential input voltage
range
Absolute maximum input
voltage
Input impedance
Input leakage current
Normal mode rejection ratio
Common mode rejection ratio
Resolution
No missing codes
Input coupling
Warm-up time
Open thermocouple detect
CJC sensor accuracy
Channel configuration
Channel configuration information is stored in the EEPROM of the isolated microcontroller by the firmware
whenever any item is modified. Modification is performed by commands issued over USB from an external
application, and the configuration is made non-volatile through the use of the EEPROM.
Sensor Category
Thermocouple
Note 1: The factory default configuration is Type J.
Table 1. Generic analog input specifications
Conditions
Thermocouple
±C0x through ±C7x relative
to GND
Open thermocouple detect
enabled
f = 60 Hz
IN
f = 50 Hz/60 Hz
IN
15 °C to 35 °C
0 °C to 70 °C
Table 2. Channel configuration specifications
Conditions
J, K, S, R, B, E, T, or N
(Note 1)
18
Specification
Four dual 24-bit, Sigma-Delta type
8 differential
500 VDC minimum between field wiring and USB
interface
Thermocouple sensor type
±0.080 V
±25 V power on, ±40 V power off.
5 GΩ, min
105 nA max
90 dB min
100 dB min
24 bits
24 bits
DC
30 minutes min
Automatically enabled when the channel pair is
configured for thermocouple sensors.
The maximum open detection time is 3 seconds.
±0.25 °C typ,
±0.5 °C max
–1.0 to +0.5 °C max
Specification
8 differential channels
Chapter 5