4B Digimatic DML4W Manual de instrucciones - Página 12

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The Digimatic can be calibrated automatically, manually or by a combination of the two methods.

Usually, automatic calibration is the simplest method, particularly when the vessel can be filled to cover

the probe.

Manual calibration is useful when a number of probes in similar applications need to be set. Once the

correct calibration has been determined and noted, on one system, the remainder can be set to the

same setting.

AUTOMATIC CALIBRATION (MATERIAL AVAILABLE) -

1. Set Park/Cal switch (A - Image D) to Cal and Auto/Man switch (C - Image D) to Auto. The Cal

LED will flash.

2. Ensure that the probe is uncovered and press and hold the "Probe Un-Covered / Lower"

button (F - Image D) button. The display will show UXXX followed by RXXX.

3. Fill the vessel sufficiently to cover the probe and then press the "Probe Covered / Raise"

button (E - Image D) button. Display will show CXXX followed by RXXX.

4. Return the Park/Cal switch (A - Image D) to park. The unit is now calibrated. UXXX and

CXXX values can be viewed but not altered by pressing the "Probe Un-Covered / Lower" and

"Probe Covered / Raise" buttons.

SEMI-AUTOMATIC CALIBRATION (MATERIAL NOT AVAILABLE) -

5. Follow steps 1 & 2 above.

6. Set Cal/Park switch (A - Image D) to Park and press the "Probe Un-Covered / Lower" button

(F - Image D) button. Note the UXXX reading but ignore the RXXX reading. Return the Cal/

Park switch (A - Image D) to Cal and set the Auto/Man switch (C - Image D) to Man.

7. From Table A below, select the nearest material type to be detected for your application and

add the value to the UXXX reading determined in step 6.

8. Press the "Probe Covered / Raise" button (E - Image D) button to raise the reading and

the "Probe Un-Covered / Lower" button (F - Image D) to lower the reading to achieve the

calculated setting from step 7.

9. Return the Cal/Park switch (A - Image D) to Park and press and hold the "Probe Covered /

Raise" button (E - Image D) to confirm that the relay operating point RXXX is correctly set.

The UXXX and CXXX settings will be one below and one above the readings.

SENSOR CALIBRATION

Table A - Typical Settings

Material Type

Light

Medium

Heavy

+60 or Greater

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Increment

+15

+30