B&K 1794 instruction manual Section Operating Instructions

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SECTION - 4

OPERATING INSTRUCTIONS

4.1TURN ON SETTING PROCEDURE :

The following procedure describes the use of controls and indicators for Constant Voltage and Constant Current Mode of Operation.

CONSTANT VOLTAGE (CV) MODE :

a.Set ‘POWER ON’ Switch & keep the OUTPUT ON/OFF switch to OFF

position ( ).

b.Press LIMIT switch and adjust the VOLTAGE controls till the desired voltage is

indicated on Voltmeter ( ).

c.Press OUTPUT switch to ON position and observe that CV LED lights ( )

CONSTANT CURRENT VOLTAGE (CC) MODE :

 

 

a. Turn off the suppy. Short circuit the output terminals

of the power supply

& turn on the supply.

 

 

b. Keep the OUTPUT ON/OFF switch in the OFF position

(

).

c.Press LIMIT switch and adjust the CURRENT controls till the desired current is

indicated on Ammeter ( ).

d.Press OUTPUT switch ON position and observe that CC LED lights ( ).

e.Remove the short circuit.

4.2SET LIMIT CONTROL (VOLTAGE AND CURRENT) :

To preset the output Voltage and Current, proceed as follows :

a.Set the OUTPUT switch to OFF position ( ) ( Release Position ).

b.Press the LIMIT switch and adjust the desired output voltage with the

VOLTAGE control potentiometers ( ).

c.Release the LIMIT switch, set the OUTPUT switch to ON position and check

the output voltage on the voltmeter ( ).

d.Set the OUTPUT switch to OFF position ( ).

e.Press the LIMIT switch and adjust the desired output current limit with the

CURRENT control potentiometers ( ).

f.Release the LIMIT switch, set the OUTPUT switch to ON position and check

the output current on the ammeter ( ).

g.Set the OUTPUT switch to OFF position ( ).

h.Connect the load to the Output terminals and set the OUTPUT switch to ON

position ( ).

4.3LOAD CONNECTIONS :

The load should be connected to the power supply output terminals using separate pairs of connecting wires. This will minimize mutual coupling effects between loads and will retain full advantage of the low output impedance of the power supply. Each pair of connecting wires should be as short as possible and twisted or shielded to reduce noise pick up. (If a shielded pair is used, connect one end of the shield to ground and leave the other end unconnected).

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Contents BK Precision Limited Two Year Warranty Table of Contents Output ON/OFF Switch Limit SettingSection General Information Description Remote Programming With External 5K PotSection Specifications Section Installation Input TAP Selection for 230V Operation Repackaging for ShipmentSection Operating Instructions Readjust the current limit in the remote sensing mode Reverse Current Loading Output CapacitanceReverse Voltage Loading Terms in this Manual Terms AS Marked on Equipment Operators Safety SummaryUSE the Proper Power Cord Servicing Safety Summary For Qualified Service Personnel onlyDo not Service Alone USE Care When Servicing with Power onServicing shall be done only by Qualified personnel Section Service Instruction GeneralTrouble Shooting Techniques Repairs & Maintenance Page REF. PCB no PIN no Parts Ordering & ReplacingPage Page Fuse Blows Fault Finding ProcedureFuse Blows Unregulated O/P Voltage Unregulated O/P VoltageNo Output Voltage No O/P VoltageNo DPM Indication No DPM IndicationDPM not Read Unit not Take Current Unit not Take CurrentUnit Directly Goes to CC Unit Directly Goes To CCNo Current Control Poor Line RegulationNo Current Control Poor Line RegulationPoor Load Regulation Poor Load RegulationCV, CC, LED not Glow External Programming Not OK External Programming not OKRemote Sense not OK Section Part List & Schematics L1791-FP-CNT-0603 PCB Assy1KPF/100V, Disc 2P2W SW Push ButtonSW1 Grey Colour CAP for Push Switch SW2 SW3 PS-PREG-1791-0503 PCB AsslyDPM/01 REV 01 X PS-AUX-DC-L1791-0503 PCB Assly PS-PWR-L1791-0703A PCB AsslyBack Trough Assly Front Panel AsslyMain Chassis Assly Front Panel Layout Back Panel Layout TOP View Bottom View of Model 1790 Front Panel Control PCB of 1790 Power Module PCB of 1790 PRE Regulator / AUX. P/S PCBs 1790 Service Information Precision CorpPrecision Corp