GE K400 user manual Fault Finding

Page 63

6

FAULT FINDING

 

 

 

 

 

 

 

Fault description

Possible problem

Solution

 

 

 

 

1.

The instrument does not

- faulty protection fuse

-Replace the fuse

 

work even if the power

- faulty power cable

-Replace the power cable

 

cord is correctly fitted and

- faulty power switch

-Contact your service representative

 

the mains switch is in the

 

 

 

correct position.

 

 

2.

When the instrument is

- short circuit on power supply card

-Contact your service representative

 

turned on the fuse blows

- faulty power switch

 

3.

The heating and cooling

- faulty power supply card

-Contact your service representative

 

function of the dry well is

- faulty controller card

 

 

not working

- damage to one or more Peltier cells

 

4.

The controller is not

- faulty controller card

-Contact your service representative

 

disabled when the set-

 

 

 

point is reached

 

 

5.

The heating and cooling

-damage to one or more Peltier cells or

-Contact your service representative

 

times out of specification.

damage to the heating system

 

6.

Fan system not working.

-faulty power supply card

-Contact your service representative

 

 

-faulty controller card

 

 

 

-faulty fan

 

7

At high temperatures the

-incorrect step or preset values

-Change the step or preset values

 

instrument cannot

-faulty reference probe

-Contact your service representative

 

stabilize.

 

 

Note:

Fuses are designed to give maximum protection in case of fault. Make sure that voltage selector and fuses are selected for the nominal working value.

K400 Issue No. 1

53

Image 63
Contents Druck DBC 150/650 Series General Electric Company. All rights reserved Technical Advice SafetyPower isolation MaintenanceTraceability and Calibration Report SymbolsAbbreviations Safety InstructionsTable of Contents CAL Electrical Input Specification DBC-TC models Optional Accessories DBC-TC series Standard Accessories DBC-TC seriesOptional Accessories DBC-TS series Standard Accessories DBC-TS seriesTS Temperature Source TC Temperature CalibratorIntroduction Parts Identification Automatic CalibrationDBC-TS Installation Power SupplyTemperature Probes Important Note Electrical Connections Connection of a Thermocouple sensor Use of screw connections for T/C wiresConnection of a 4-wire RTD Connection of a 3-wire RTDGeneral Operating procedureCalibration with external reference probe External probe connections OPERATI0N Arrow keys +/- keyKey Numeric keysMenu selection screen System Set-up ScreenWorking screen Self-test screen Help/Info screenDual display generated temperature and an input test option Function Modes Reading of the generated temperatureTemperature Reference Selection Internal reference probeExternal reference probe SEL RTD Temperature unit setting System Set-up Language settingKey-padaudio signal Digital interface settingsCalibration Printer settingsProtection code 150.00 C Testing Modes Direct modeFixed step selection Step mode19.00 C 50.00 C Ramp modePreset values mode Measuring an Input Switch Test148.00 C Thermocouple TestingInternal Setting Cold Junction CompensationDirect CAL ModeSpan AbsoluteReading 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 Serial Communication DBC Series Serial Commands ProtocolTS/ 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 mA input range DBC-TC only Calibration of the Volt input range DBC-TC onlyCalibration of the resistance Ohm input ranges DBC-TC only Fault Finding Cleaning Instructions MaintenanceTechnical Specification Standard SpecificationCommon specification Input Range Resolution Accuracy Days Year Electrical Input Specifications DBC-TC models

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