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CR1000 Manual - Campbell Scientific

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Section 8. Operation<br />

Figure 95: Input error calculation<br />

Input Error Examples: Type T Thermocouple @ 45°C<br />

These examples demonstrate that in the environmental temperature range, inputoffset<br />

error is much greater than input-gain error because a small input range is<br />

used.<br />

Conditions:<br />

<strong>CR1000</strong> module temperature,‐25 to 50°C<br />

Temperature = 45°C<br />

Reference temperature = 25°C<br />

Delta T (temperature difference) = 20°C<br />

Thermocouple output multiplier at 45°C = 42.4 µV °C ‐1<br />

Thermocouple output = 20°C * 42.4 µV °C ‐1 = 830.7 µV<br />

Input range = ±2.5 mV<br />

307

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