Figure 98: input error calculation – Campbell Scientific CR3000 Micrologger User Manual

Page 313

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Section 8. Operation

313

Figure 98: 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:

CR3000 module temperature,‐25 to 50°C

Temperature = 45°C

Reference temperature = 25°C

Delta T (temperature difference) = 20°C

Thermocouple output multiplier at 45°C = 42.4 µV °C

‐1

Thermocouple output = 20°C * 42.4 µV °C

‐1

= 830.7 µV

Input range = ±20 mV