Tempco TEC-2500, Инструкция по эксплуатации

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The 5520A calibrator is configured for K type thermocouple output with internal compensation. Send a 0.00°C signal to
the unit under calibration. The unit under calibration is powered in a still-air room with a temperature of 25±3°C. Allow at
least 20 minutes to warm up. The DIP switch is located at the TC input. Perform step 1 as stated above, then press the
scroll key until the display shows . Press the up and down keys until a value of 0.00 is obtained. Press the scroll
key at least 3 seconds. The display will blink for a moment until a new value is obtained. If the display didn't blink or if
the obtained value is equal to -5.00 or 40.00, then calibration failed.
Step 10.
Set up the equipment the same as in step 9. The unit under calibration is powered in a still-air room with a temperature
of 50±3°C. Allow at least 20 minutes to warm up. The calibrator source is set at 0.00°C with internal compensation
mode.
Perform step 1 as stated above, then press the scroll key until the display shows . Press the up and down keys
until a value of 0.0 is obtained. Press the scroll key for at least 3 seconds. The display will blink for a moment until a
new value is obtained. If the display didn't blink or if the obtained value is equal to -199.9 or 199.9, then calibration
failed. This setup is performed in a high temperature chamber, therefore it is recommended to use a computer to
perform the procedures.
Step 10N.
Perform step 1 as stated above, then press the scroll key until the display shows . Press the up and down keys
until a value of 0.1 is obtained. Press the scroll key for at least 3 seconds. The display will blink for a moment until the
new value 0.0 is obtained. Otherwise, calibration failed.
Caution: It is not recommended to use step 10N, since the cold junction gain is not able to achieve the rated accuracy
using this step.
• Final step
Step 11.
Set the DIP switch to your desired position (refer to section 1-3).
calibration mode. Output 1 and output 2 use their failure transfer values to control.
• Perform step 2 to calibrate zero for the A to D converter and step 3 to calibrate the gain for the A to D converter. The DIP switch should be set for T/C
input.
Automatic calibration procedures
The programming port (see section 2-18) of the TEC-2500 can be used for automatic calibration.
The equipment required for automatic calibration is available upon request.
Step 9.
Set up the equipment according to the following diagram to calibrate the cold junction compensation. Note that a K type
thermocouple must be used.