Campbell CR1000 User Manual

Section 8. Operation
Table 67. Voltage Range for Maximum Thermocouple Resolution
Reference temperature at 20°C
TC Type and
Temperature
Range (°C)
Temperature
Range (°C)
for ±2.5 mV
Input Range
Temperature
Range (°C)
for ±7.5 mV
Input Range
Temperature
Range (°C)
for ±25 mV
Input Range
Temperature
Range (°C)
for ±250 mV
Input Range
R: –50 to 1768 –50 to 320 –50 to 770 –50 to 1768 not used
S: –50 to 1768 –50 to 330 –50 to 820 –50 to 1768 not used
N: –270 to 1300 –80 to 105 –270 to 260 –270 to 725 >725
Figure 89. Input Error Calculation
Input Error Examples: Type T Thermocouple @ 45°C
These examples demonstrate that in the environmental temperature range, input-
offset error is much greater than input-gain error because a small input range is
used.
Conditions:
CR1000 module temperature, –25 to 50 °C
Temperature = 45 °C
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Campbell CR1000 Specifications

General

Power Requirements	9.6 to 16 VDC
Data Logger Operating System	CRBasic
Memory	4 MB
Analog Inputs	16 single-ended or 8 differential
Analog Input Resolution	13 bits
Analog Input Range	+/-2.5V
Digital I/O	8
Pulse Counters	2
Communication Ports	RS-232
Operating Temperature	-25°C to +50°C
Pulse Channels	4