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

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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.

50

K400 Issue No. 1

Page 59 Page 61
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Page 59 Page 61
Contents Druck DBC 150/650 Series General Electric Company. All rights reserved Safety Power isolationMaintenance Technical AdviceSymbols Traceability and Calibration ReportSafety Instructions AbbreviationsTable of Contents CAL Electrical Input Specification DBC-TC models Standard Accessories DBC-TC series Optional Accessories DBC-TC seriesStandard Accessories DBC-TS series Optional Accessories DBC-TS seriesTS Temperature Source TC Temperature CalibratorIntroduction Automatic Calibration Parts IdentificationDBC-TS Installation Power SupplyTemperature Probes Important Note Use of screw connections for T/C wires Electrical Connections Connection of a Thermocouple sensorConnection of a 3-wire RTD Connection of a 4-wire RTDOperating procedure GeneralCalibration with external reference probe External probe connections OPERATI0N +/- key KeyNumeric keys Arrow keysMenu selection screen System Set-up ScreenWorking screen Help/Info screen Self-test screenFunction Modes Reading of the generated temperature Dual display generated temperature and an input test optionTemperature Reference Selection Internal reference probeExternal reference probe SEL RTD System Set-up Language setting Temperature unit settingDigital interface settings Key-padaudio signalPrinter settings CalibrationProtection code Testing Modes Direct mode 150.00 CStep mode Fixed step selection19.00 C Ramp mode 50.00 CPreset values mode Switch Test Measuring an InputThermocouple Testing 148.00 CSetting Cold Junction Compensation InternalCAL Mode DirectAbsolute SpanReading RTD Measurements Pt-100 Using the keys, select the required method and press ent Reading Current Measurements CAL Voltage Measurements high level CAL Volt Voltage Measurements low level Resistance Measurement DBC Series Serial Commands Protocol Serial CommunicationTS/ TC Read AaOM 1? Preset mode French German Italian Portuguese Spanish Write Par = floating point Calibration Important NoteCalibration of the standard Reference Probe Input REF RTD Calibration of the millivolt input ranges DBC-TC only Calibration of the Volt input range DBC-TC only Calibration of the mA input range DBC-TC onlyCalibration of the resistance Ohm input ranges DBC-TC only Fault Finding Maintenance Cleaning InstructionsTechnical Specification Standard SpecificationCommon specification Electrical Input Specifications DBC-TC models Input Range Resolution Accuracy Days Year

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