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50 K400 Issue No. 1
1 To 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.
2 Follow the above procedure to insert the coefficients of the probe in use.
3 Change from INTERNAL to SEL RTD, Direct mode. The display shows the
temperature measured by the Reference Probe.
4 Select the CALIBRATION menu and use the PIN to enter the menu. Record
the values of SET1 ...SET4, and REF1 ... REF4.
5 Set 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.
6 Set 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.
7 Enter the Calibration menu, select dry well CALIBRATION.
8 Calculate the NEWREF1 ... NEWREF4 value as follow: NEWREFx= READx-
SETx+REFx.
9 Type in REF1 ...REF4 fields the values NEWREF1 ...NEWREF4.
10 Press ENTER. DBC650 (150) automatically calculates the coefficients.
11 The 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.
From the CALIBRATION menu select one of the mV input range to be calibrated
using the and press ent.
CALIBRATION
REF. RTD INPUT
CALIBRATION
mV (1)
mV (2)
REF. RTD
BLOCK