Serial commands that are related to calibration are described in this section. For the actual calibration procedures, see Calibration and Adjustment on page 58. |
Syntax | Description |
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crh<cr> |
Use the crh command to perform a 1-point or 2-point humidity (RH) calibration. When performing a 1-point calibration, you need to place the probe in a single humidity reference with RH < 50%. Run the command and enter the exact RH of the reference after the measurement has stabilized. Exit the command by pressing the ESC key before proceeding to the second point (see example 3). To update the value, press ENTER without inputting a value. For 2-point calibration, the first point requires a RH < 35% humidity reference, the second point must be RH > 50%. |
Example 1: 1-point
calibration
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Example 2: 2-point
calibration
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Example 3: No calibration, only updating the
value
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Syntax | Description |
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crhclr<cr> |
Use the crhclr command to restore the probe RH factory calibration. |
Example:
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Syntax | Description |
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ct<cr> |
Use the ct command to perform a 1-point or 2-point temperature calibration. When performing a 1-point calibration, you need to place the probe in a single temperature reference. Run the command and enter the exact temperature of the reference after the measurement has stabilized. Exit the command by pressing the ESC key before proceeding to the second point. To update the value, press ENTER without inputting a value. For 2-point calibration, the second reference point must be at least 30 °C (86 °F) warmer than the first. The measurement reading for the second point will appear when this requirement is met. |
Example 1: 1-point
calibration
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Example 2: 2-point
calibration
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Example 3: No calibration, only updating the
value
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Syntax | Description |
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ctclr<cr> |
Use the ctclr command to restore the probe temperature factory calibration. |
Example:
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Syntax | Description | ||
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acal<cr> |
Use the acal command to calibrate the analog current loop outputs. After you give this command, the CH1 analog output of the transmitter is set to the low limit (4 mA). Measure the output and enter the measured value. After entering the low limit, you must measure and enter the high limit (20 mA) also. The same procedure is then repeated with CH2. Calculated coefficients are printed after the measured values are given. |
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Example:
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