1To calibrate the dry well regulation, install a suitable reference probe in the dry well and connect it to the Reference Probe socket in the front panel.

2Follow the above procedure to insert the coefficients of the probe in use.

3Change from INTERNAL to SEL RTD, Direct mode. The display shows the temperature measured by the Reference Probe.

4Select the CALIBRATION menu and use the PIN to enter the menu. Record the values of SET1 ...SET4, and REF1 ... REF4.

5Set the dry well temperature at SET1 value; wait at least 30 minutes at this temperature. Record the true temperature value on display, identify this value as READ1.

6Set the dry well temperature at SET2 value; wait at least 30 minutes at this temperature. Record the true temperature value on display, identify this value as READ2. Repeat this procedure for SET3 and SET4 and record values READ3 and READ4.

7Enter the Calibration menu, select dry well CALIBRATION.

8Calculate the NEWREF1 ... NEWREF4 value as follow: NEWREFx= READx- SETx+REFx.

9Type in REF1 ...REF4 fields the values NEWREF1 ...NEWREF4.

10Press ENTER. DBC650 (150) automatically calculates the coefficients.

11The calibration of the dry well temperature regulator has been completed.

Calibration of the millivolt input ranges (DBC-TC only)

The DBC-TC series has four different millivolt input ranges to be calibrated, depending on the type of thermocouple measurements available, the calibration procedure is the same.

CALIBRATION

REF. RTD INPUT

REF. RTD

BLOCK CALIBRATION

mV (1)

mV (2)

From the CALIBRATION menu select one of the mV input range to be calibrated

using the and press ent.

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K400 Issue No. 1

Page 60
Image 60
GE K400 user manual Calibration of the millivolt input ranges DBC-TC only

K400 specifications

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