Chromalox 2110 Instrukcja Użytkownika Pobierz pdf (Strona 24)

Chromalox 2110

Factory Calibration

Recovery

This procedure allows you to return the controller to its factory

calibration settings in the event it is severely out of calibration

due to poor technique or unauthorized calibration.

1. Disconnect load power.

2. Cycle the sensor selection switch twice from its original posi-

tion (TC or RTD) to the opposite position (RTD or TC) and

back to its original position. This brings back the factory cali-

bration and deletes the manual calibration settings.

Section 7–Calibration

When calibrating the 2110

1. You must have a sensor simulator to calibrate the 2110 controller.

Substitute a precision sensor simulator (Thermocouple simulator

or resistance simulator box) for sensor inputs.

2. Disconnect load power to prevent damage to the process or load.

3. Calibrate RTD inputs using copper (Cu) wire. Calibrate thermo-

couple inputs using thermocouple extension wire of the same

type as the thermocouple you are calibrating.

4. Allow the controller to warm up with the appropriate sensor simu-

lator connected for at least one hour prior to calibration.

5. To access the calibration menu, you need level C (736) security.

Sensor Calibration:

1. Set the 2110 selection switch to RTD or TC. If TC is selected,

then set the selection switch to J or K.

2. Connect the sensor simulator to the sensor input terminals.

3. Set the simulator to the low value of the sensor selected J TC

(-100°F), K TC (-100°F), RTD (-200°F or 48.46W).

4. Go to the CALS parameter on the 2110. The display will toggle

between CALS and inLo.

5. Wait 30 seconds for the electronics to fully stabilize. Press .

Dashes will appear in the display while the controller calibrates

the low end of span.

6. When the controller prompts inHi in the display, adjust the sensor

simulator to the high end of the selected sensor span.

J TC (1400°F), K TC (2400°F), RTD (1000°F or 293.49W).

7. Wait 30 seconds for the electronics to fully stabilize. Press .

Dashes will appear in the display while the controller calibrates

the high end of span. When ﬁnished, the controller will display

donE.

8. Calibration is complete.

Calibration

continued

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