Lambda ESKI User manual

Brand: Lambda

Model: ESKI

Type: User manual

LAMBDA EMI

405 ESSEX ROAD, NEPTUNE, NJ 07753

TEL: (732) 922-9300

FAX: (732) 922-9334

INSTRUCTION MANUAL FOR





83-475-001 Revision D

MODEL

SERIAL NUMBER

186.1 RECOMMENDED SPARE PARTS LIST

6 RECOMMENDED SPARE PARTS

175.4 TROUBLESHOOTING

155.3 CALIBRATION

155.2 INSPECTION AND CLEANING

155.1 GENERAL

5 MAINTENANCE AND TROUBLESHOOTING

144.4 A200 BUCK CONVERTER

134.3 SIGNAL FLOW (SCHEMATIC 01-000-225)

134.2 POWER FLOW (SCHEMATIC 01-475-005)

134.1 GENERAL

4 PRINCIPLES OF OPERATION

73.2 MODES OF OPERATION

73.1 TURN-ON CHECK OUT PROCEDURE

3 OPERATING INSTRUCTIONS

52.5 MECHANICAL

52.4 COOLING

52.3 POWER REQUIREMENTS

52.2 MECHANICAL CHECK

52.1 INITIAL INSPECTION

2 INSTALLATION

21.2 SPECIFICATIONS

21.1 DESCRIPTION

1 GENERAL INFORMATION

TABLE OF CONTENTS

Description Page

MEMORANDUM TO USERS OF E/M POWER SUPPLIES IN RACK INSTALLATION

All E/M power supplies have been designed and tested to provide full rated current and voltage

throughout the specified line voltage range at the rated ambient air temperature. To achieve this

maximum rating, airflow as provided by the internal fans, proportioned and directed by chassis

openings and internal partitions, must not be impeded.

On the ESKI supplies, air enters the unit from the front, at the location of the fan, and is

transferred through the supply in a horizontal direction toward the rear. Airflow is reduced any

time there is a negative pressure at the air inlet or positive pressure at the air outlet. Each fan is

capable of providing 100 to 130 cubic feet per minute of air flow (CFM) at zero static pressure.

The supply itself produces some restrictions to this flow so that approximately 80% of the airflow is

available. As static pressure increases, caused by additional restriction of airflow external to the

power supply, the efficiency of the fans drops significantly and airflow is greatly reduced. This

reduction in airflow causes a substantial increase in internal temperatures of the supply, frequent

thermostat shut down and reduced power supply reliability.

Ideally, when power supplies are mounted in a rack, the rack should have no sides or rear covers.

Since this is usually not practical or safe, the installer must consider the effect of any enclosure on

power supply airflow. Since the power supplies must be supported by some sort of rail along the

sides of the supply, front to rear, this rail must be chosen for proper strength but must not be either

too close to or extend up too far along the side of the supply or airflow will be blocked. To

minimize vertical height use an angle iron of substantial cross section and unequal leg dimension.

Do not support the power supply from the front panel only, in an attempt to minimize this problem.

The rail does not need to be continuous from the front to back to support the supply, but for safety

and ease of installing and removing the supply it usually is.

Most commercial racks are available with louvered side panels and doors. Side panels are also

available with an extended depth which provides an additional plenum space on each side of the

rack for improved airflow.

The ambient air, especially in a tropical climate can also be very hot. Frequently, high humidity is

also present. This situation, while not ideal for power supply longevity, should in itself cause little

difficulty. When combined with insufficient airflow, however, it can significantly affect power

supply.

Page 1 of 18

83-475-001 Rev. D

1 GENERAL INFORMATION

1.1 DESCRIPTION

This manual contains operation and maintenance instructions covering the Electronic

Measurements, Inc. series of ESKI power supplies. These supplies are constant current

regulated sources of DC power, which also contain boost voltage and ignition pulse to

start Xenon Lamps.

1.2 SPECIFICATIONS

The following specifications describe the operational characteristics of this series of

power supplies. All units are shipped with an AC barrier strip located on the back of the

unit.

AC INPUT: THREE PHASE UNIT

208/220 VAC ± 10% three phase 3 wire delta. 47-63 Hz optional 208/220 VAC ± 10%

single phase 47-63 Hz.

AC INPUT : SINGLE PHASE UNIT

208/220 VAC ± 10% Single Phase 47-63 Hz.

AC INPUT CURRENT: THREE PHASE UNIT

22 Amps per phase for 3 phase power

AC INPUT CURRENT: SINGLE PHASE UNIT

45 Amps

REGULATION:

The current regulation for line variations of ± 10% is .1% over the range of input AC.

The load current regulation for a 25% load change is .1%.

STRIKE VOLTAGE: 25KV

BOOST VOLTAGE: 800 Volts

RIPPLE:

The output ripple measured with the circuit of Fig. 1 will be ≤ 0.8V

p-p

at 40 Amps current

output.

EFFICIENCY:

The AC input to the DC output is 92%.

RESPONSE TIME: The programming response time is approximately 1 millisecond for a

50% current change.

STABILITY:

The maximum deviation in output current for an 8 hour period is .05% under conditions of

constant line, load and temperature after a 2 hour warm-up.

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83-475-001 Rev. D

TEMPERATURE COEFFICIENT:

The output current is .02% /C of rated output current.

TEMPERATURE:

Operating continuous duty performance within specification in any ambient temperature

between 0°C and 60°C with appropriate derating above 50°C. Units may be safely stored

at temperatures of -55°C to 85°C.

COOLING:

Cooling air driven by a long life fan enters the enclosure at the front and exits at the sides

and rear.

ISOLATION:

Non-line isolated power supply circuitry is fully isolated from chassis.

LEAKAGE:

Per UL 1012 with standard RFI filter.

CONTROLS:

All ESKI power supplies are provided with a U/L listed circuit breaker which combines

primary circuit protection with on/off control. Current adjustment is via a single (10) turn

potentiometer located on the front panel. Indication of the output current is provided by

an ammeter mounted on the front panel. Indication of lamp voltage is provided by a

voltmeter mounted on the front panel.

PROTECTIVE CIRCUITS:

Adjustable over-current kill circuit drops output to zero in case the current regulation goes

out of control. Automatic reset over-temperature switch disables power output.

PROGRAMMING:

All ESKI power supplies may be remotely controlled via a connector for current, power

supply enable, current readback, ignition and interlock functions.

DIMENSIONS:

Three Phase P/S 5 1/4' H X 19" W X 15" D

Single Phase P/S 7" H X 19" W X 17" D

WEIGHT:

Three Phase P/S 45 Pounds

Single Phase P/S 55 Pounds

Page 3 of 18

83-475-001 Rev. D

Figure 1 Loss Pass Filter

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83-475-001 Rev. D

2 INSTALLATION

2.1 INITIAL INSPECTION

Before shipment, this instrument was inspected and found to be free of mechanical and

electrical defects. As soon as the unit is unpacked, inspect for any damage that may

have occurred in transit. Check for broken knobs or connectors, that the external surface

is not scratched or dented, meter faces are not damaged and that all controls move

freely. Any external damage may be an indication of an internal problem.

2.2 MECHANICAL CHECK

 Remove twelve 6-32 machine screws from the top cover.

 Cover can now be removed.

 Inspect for loose hardware, damaged components or broken wires.

 Check operation of controls.

NOTE: If any damage is found, follow the "Claim for Damage in Shipment" instruction in

the warranty section of this manual.

2.3 POWER REQUIREMENTS

A suitable source of AC power is required for this supply. The unit will operate on 50 or

60 Hz line frequency. The line impedance from the power source should be fairly low

since high peak currents are drawn. The three phase input is rated for 25 Amps and the

wire size should be at least 10 gauge. The current input for single phase is rated for 50

Amps and the wire size should be at least 8 gauge. The connecting wire size is larger

than service rating.

2.4 COOLING

Each power supply enclosure is cooled by a suitable sized blower fan exhausting warm

air to the rear. Fresh air intake is from the front. None of the surfaces of the supply

radiates heat to adjacent equipment. At least five inches of space should be allowed

behind the supply and one inch along each side for unimpeded air flow.

2.5 MECHANICAL

The supply is capable of being rack or bench mounted. Horizontal mounting is preferred.

However, mounting in any position is allowed. For rack mounting, additional support

other than that provided by the front panel is required. Angle iron slide mounting support

or cross beam member support is required for permanent mounting. The sides of each

supply are equipped with mounting holes for rack slide mounting.

The type of rack slide mountings are:

C300S18 (Chassis Trak Corporation, Telephone #317-897-7000)

This mount will work for both single and three phase units.

For bench mounting, four mounting feet are provided which are adhesive-mounted to the

base surface of the supply.

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83-475-001 Rev. D

3 OPERATING INSTRUCTIONS

Figure 2 Front Panels

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83-475-001 Rev. D

3.1 TURN-ON CHECK OUT PROCEDURE

The front panel surface contains all the controls and indicators necessary to operate the

supply in its normal mode. The following checkout procedure describes the use of the

front panel control and indicators (Fig. 2) and insures that the supply is operational. This

preliminary check of the power supply is done without a load connected.

DANGER:

Before conducting this test, the output terminal guard must be removed and at

least 6" of space around the output terminal must be maintained.

3.1.1 Check the jumpers in the connector P101 on the back of the set.Pin 1 should be

jumpered to Pin 9. Pin 3 to 10, Pin 7 to 8, and Pin 6 to Pin 12. This jumper

configuration will allow the supply to be operated via the front panel controls.

3.1.2 Set CURRENT CONTROL (5) to maximum CCW.

3.1.3 Connect the AC power to the terminal strip TB1 on the back of the power supply.

3.1.4 Turn the CIRCUIT BREAKER (1) on/off switch to "ON". the fans will start

immediately, but there is a 10 to 15 second delay before voltage or current output

will occur. This is caused by the soft start circuit.

3.1.5 The UNIT ON INDICATOR (2) should be on. Turn LAMP ON/OFF SWITCH (3)

on.

3.1.6 Advance CURRENT CONTROL (5) slowly. The DC VOLTMETER (7) will deflect

from zero to maximum rating of the supply as this control is advanced clockwise.

3.1.7 Push the IGNITION BUTTON (4) and hold for 10 seconds. The ignition spark gap

should be heard snapping approximately once per second. (If automatic ignition is

present the spark gap should be heard just after the output voltage is present in

Step 3.1.6).

3.1.8 Turn the current control maximum CCW and turn off the CIRCUIT BREAKER (1).

These tests indicate the power supply is operating and is ready to be connected to

a lamp.

3.2 MODES OF OPERATION

This supply is designed so that its mode of control is selected by the jumpers on P1. The

following chart details the function of each pin.

PIN # FUNCTION

1 & 9 External ON/OFF switch connection, ON when shorted.

3 & 10 External interlock connection shorted is normal.

4 & 2 Current monitor output (pin 4) & common (pin 2).

5 External modulation input.

6 or 7 & 11 External control (0-5 V) input (pin 6 or 7) com (pin 11).

8 One milliAmp current source output.

12 Front panel potentiometer connection.

Page 7 of 18

83-475-001 Rev. D

3.2.1 NORMAL OPERATION (FIG. 3 AND FIG. 3A)

Pins 1 & 9 jumpered, Pins 3 & 10 jumpered, Pins 7 & 8 jumpered and Pins 12 & 6

jumpered.

This is the normal mode of operation. All performance specifications, unless

otherwise stated, are defined in this configuration. Should any problems develop,

the supply should be returned to this normal mode of operation for

trouble-shooting.

3.2.2 CONNECTING LOAD

The lamp load must be connected to the two 1/4 - 20 screw terminals at the rear

of the unit.

WARNING:

This is a transformerless unit without an Isolation Transformer and the

output terminals are NOT isolated from the input line. All terminals and

external circuits must be insulated from ground to withstand a high pot

voltage of at least 30 kVdc.

The output terminals' polarity is silk-screened adjacent to the terminal.

3.2.3 REMOTE PROGRAMMING

This supply can be programmed by an external resistance (0 - 5k Ohms) or an

external voltage (0-5V). The wire connecting the programming terminals of the

supply to the remote programming device should be twisted, or if strong AC or RF

fields are present, shielded.

CAUTION:

If the remote programming function fails or is inadvertently adjusted, the

output current could go to 110% of maximum output. This will cause the

over-current circuit to shut down the supply until it is reset by turning off

the AC circuit breaker.

3.2.4 REMOTE PROGRAMMING BY EXTERNAL RESISTANCE

The current output is controlled by an external 0 to 5000 Ohm resistance.

Replace the jumper between Pins 6 & 12 of P1 with an external resistance

connected between Pins 6 & 11. At 5000 Ohms the supply will output full current.

At less than full output the programming resistance is determined from the

following formula:

Resistance = (5000 X Desired Current / Full Rated Current Output)

Page 8 of 18

83-475-001 Rev. D

Figure 3 1 Phase Front Panel Control Hookup

Page 9 of 18

83-475-001 Rev. D

Figure 3A 3 Phase Front Panel Hookup

3.2.5 REMOTE PROGRAMMING BY AN EXTERNAL VOLTAGE

The jumpers between Pins 7 & 8 and 6 & 12 are removed and an external voltage

is fed to Pins 6 & 11. The positive side to Pin 6 & the negative to Pin 11.

3.2.6 EXTERNAL INTERLOCK & ON/OFF SWITCH (FIG. 4 AND FIG. 4A)

The supply can be connected to an external interlock system, which will prevent

operation until the external interlock circuit is closed. The current and voltage is

less than 25 mA and 15 volts. The interlock should be connected between Pins 3

& 10 of P1. When these two Pins are open, the power supply will not ignite or

allow current to the lamp.

The supply can also be controlled, ON & OFF, by an external switch closure. The

switch contacts should be able to handle at least 25mA and 15 volts. To turn the

supply off, open the jumper between Pins 1 & 9 of P1 and likewise to turn it on,

short between Pins 1 & 9.

3.2.7 EXTERNAL CURRENT MONITOR

Page 10 of 18

83-475-001 Rev. D

The current from the supply can be monitored by reading the voltage between

Pins 4 & 2 of P1. This voltage is set for 1 volt = 10 Amps when received from the

factory and can be loaded with a resistance of 10k Ohms.

Figure 4 3 Phase External Control Hookup

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83-475-001 Rev. D

Figure 4A 1 Phase External Control Hookup

Page 12 of 18

83-475-001 Rev. D

4 PRINCIPLES OF OPERATION

4.1 GENERAL

This supply rectifies and filters the AC input voltages, then a 20kHz switching buck

regulator regulates the output DC. Also supplied is a 25kV ignition pulse and 800V boost

to start the lamp. The A100 PCB compares the output current to the input reference and

adjusts the duty cycle up or down to maintain regulation.

Figure 5 Duty Cycle Regulation

4.2 POWER FLOW (SCHEMATIC 01-475-005)

The 208/220 VAC 3 Phase or 208/220 VAC 1 Phase power is applied to TB1 then to CB1

and on to the line filter A300. From the line filter, the AC is rectified by CR4, (CR4a and

CR4b for 1 Phase), and is filtered by L1 and C1, (L1a, L1b, C1a, C1b and C1c for 1

Phase P/S). The resulting DC is then chopped by the buck converter A200 and again

filtered by L2 & C2. CR5 is a blocking diode, which allows the injection of a boost voltage

and T1 is the ignition transformer, which produces the 25kV start pulse.

4.3 SIGNAL FLOW (SCHEMATIC 01-000-225)

The 208 VAC is applied to T3 & T4, which reduces the voltage to 15 VAC, which is

rectified by CR45, CR49, CR47 and filtered by C33, C35 and C37. U12, U13 and U14

regulate the rectified DC to produce three independence DC voltages, which supply the

control circuit with operating potential.

The main PWM is U8 and its' output is via P4, Pins 4 & 5. The control amplifier (Pins 1 &

2) is connected to the shunt and provides for current regulation. The control amplifier

(Pins 4 & 5) is connected to the attenuated voltage output and provides for the maximum

unloaded voltage output.

Pin 9, the shutdown pin, is controlled by U7, which in turn is controlled from the protection

circuits U1, U3 and U4. U5A, U6, T2 & U10B isolate the control signal which is used to

unbalance the inputs to the PWM (Pins 1 & 2).

The shunt voltage is amplified by U10A and fed to the isolation circuits of U11, T1 and

U4B. This channel allows the output DC current to be monitored by an external monitor

isolated from the DC shunt.

Page 13 of 18

83-475-001 Rev. D

Q3, U5B and CR22 produce a 1mA current source at P1 (Pin 8). The supply requires a 0

to 5 volt signal to output, zero to full current out. To get this voltage on Pin 7 (P1), the

1mA current source is conducted through a 0 to 5k Ohm pot to produce the control

voltage.

The protection circuits consist of an ignitor "time out" timer, low voltage inhibit, soft start

timer, interlock and overcurrent detector. All the protection circuits either allow Q1 to be

turned on, which turns off U7 (thus disabling the PWM) or they keep Q1 off (enabling the

PWM).

The igniter "time out" timer consists of U1B, U1A and U2. When Q1 is turned on, the

output of U1B goes high. This in turn charges C1 through R1. If this is allowed for

sufficient time, C1 will charge to a voltage greater than the 5.1V (REF) and this will cause

U1A to latch on, thus turning on Q1 and disabling the PWM. During the time that C1 is

being charged, U2 can terminate the time out by shorting C1. U2 is turned on when a

current of greater than 4 Amps is flowing from the output.

The low voltage inhibit is made up of U3A. the unregulated +12 volt supply, which

represents line voltage, is attenuated and input to U3. this input is compared to the

5.1V(REF) and turns on Q1 when the line voltage is below 180 VAC, disabling the PWM.

The soft start circuit (Q2 and U3B) turns on the soft start relay K1. Q2, which turns on the

relay, is kept biased off until C5 charges to 5.1 volts. This takes about 10 seconds.

During these 10 seconds, the main filter capacitors' (C1) charging current is limited by the

400 Ohms of R1 for the 10 seconds, then K1 closes, shorting out the limiting resistor.

The interlock circuit is made up of CR12 & 13 and P1 (Pins 1, 9, 3 and 10). When these

pins are shorted, the input bias to Q1 is disabled, allowing the PWM to operate.

The over-current detector, U4A, monitors the voltage readback from the shunt. And, if

the voltage exceeds 5.1 volts, the output of U4A is latched high again turning on Q1,

which disables the PWM.

4.4 A200 BUCK CONVERTER

The A200 buck converter can be thought of as a switch connected between E2 and E3.

This switch, in the form of an IGBT transistor, (Q1, 2 and 3) is switched on and off at a 20

kHz rate. To get more lamp current, the switch is closed longer than normal. The choke

L2, on the main schematic, filters the chopped output, caused by the switch opening and

closing, to produce pure DC. For example, if the switch is turned on and off at a 50%

duty cycle, the output DC output voltage will be 1/2 the input DC at E1 and E2.

The switch control signal is fed to the A200 PCB from the A100 via P1. U1 is an optical

coupler to isolate the control signal. The output from U1 is amplified by U2 and fed to two

FET's which produce a bipolar drive to the transistor switches Q1, Q2 and Q3. U3

supplies the upward pull for the gate drive and U4 provides a pull down to quickly

discharge any input capacity. The output of U3 and U4 is isolated by R9 and R10 for

Q1.CR10 is a clamp diode to prevent excessive drive. Like-wise R11 and R12 are for Q2

and etc.

There are 3 switches in parallel and for this, only one will be explained. CR1 is the

flyback catch diode. CR4, CR5, C4 and R4 are snubbers to help shape the waveform

across the transistor switch for least power dissipation and voltage spikes. The chokes

L1A, B and C are for balancing the current between the switch transistors. C10, C1, C2

and C3 are filters for the 20 kHz switching signals.

Page 14 of 18

83-475-001 Rev. D

5 MAINTENANCE AND TROUBLESHOOTING

5.1 GENERAL

A regularly scheduled preventative maintenance consisting of a thorough cleaning of

interior and a visual inspection of the components on the circuit boards and heatsinks

mounted on the chassis floor. A relatively clean location would require at least one

inspection every six months.

5.2 INSPECTION AND CLEANING

CAUTION: Always disconnect AC power from the supply before removing the cover.

5.2.1 Remove the (12) 6-32 screws from the covers.

5.2.2 Remove the wrap-around cover by lifting upward.

5.2.3 Check for loose wire connections, burn marks etc...

5.2.4 Remove dust from in and around parts with a small brush or compressed air.

5.2.5 Check the fan to be sure it operates freely and turns when power is applied.

CAUTION:

Whenever power is applied and removed, all capacitors should be

discharged through a 10 Ohm resistor before any contact with the circuit.

5.3 CALIBRATION

This procedure applies to the adjustment and calibration of a properly functioning unit

only. Any malfunction must be corrected before proceeding with calibration. Remove the

top cover to make these calibrations.

CAUTION:

DANGER LETHAL VOLTAGES

This Power Supply contains very lethal voltage and no work should be attempted unless

the person doing the work is a highly trained electronic technician who has studied the

schematics and understands how the circuit operates and takes safety measures to

prevent injury.

(Note the location of parts: the 100 numbers are on the A100 PCB, the

300 numbers are on the A300 board, etc...)

Equipment required:

1. Oscilloscope - Dual trace, 60 MHz, isolated from ground,

Philips PM3267 or equivalent.

2. Shunt - 50 Amp 100 mV Empro HA50-100

3. Multimeter - Fluke 360 or equivalent.

4. Load - 6kW Resistive load 3.1 Ohm

Unless the power supply is found to be outside the normal tolerance, no adjustment

should be attempted.

5.3.1 CURRENT METER

Page 15 of 18

83-475-001 Rev. D

1. Connect the load in series with the shunt to the output terminals.

2. Plug in a jumpered plug for normal operation, see paragraph 3.3.

3. Connect the multimeter across the shunt.

4. Turn on the supply and adjust the output current for 80MV across the shunt.

5. Connect the multimeter between TP5 and TP15 and adjust R166 for a meter

reading of 4.00 volts.

6. Adjust R121 for a front panel meter reading of 40 Amps.

7. Turn off the supply and adjust the current control maximum CCW.

5.3.2 VOLTMETER

1. Repeat steps 1 and 2 as in paragraph 5.3.1.

2. Connect the voltmeter across the output terminals.

3. Turn on the supply and adjust the output for approximately 125Vdc.

4. Adjust R145 for a front panel meter reading of 125Vdc.

5.3.3 FULL SCALE CURRENT OUTPUT

1. Repeat steps 1, 2 and 3 as in paragraph 5.3.1.

2. Turn on the front panel current control full CCW.

3. The output current should be zero, if not, adjust R160 for zero current output.

4. Adjust the current control maximum CW.

5. Adjust R179 for the desired maximum current output. (40 Amps).

5.3.4 AUXILIARY CALIBRATION

This portion of the procedure normally does not need to be performed, unless

Paragraphs 5.3.1, 5.3.2 and 5.3.3 can not be performed.

1 mA Current Source Calibration:

1. Connect a current meter between Pins 8 and 11 of P1.

2. Adjust R137 for 1mA.

Program Limit:

1. Connect a voltmeter between TP107 and TP113.

2. Adjust R127 for a voltmeter reading of 5.1 volts.

Min. IO Detector:

1. Connect the voltmeter between E2-2 and E2-1.

2. Adjust the output current for 0 to 10 Amps. The voltmeter should switch from

13 volt to less than .6V at approximately 4 Amps.

Page 16 of 18

83-475-001 Rev. D

5.4 TROUBLESHOOTING

WARNING:

When servicing supply, dangerous voltage levels exist. Be especially careful of

personnel and equipment because this supply is not isolated from the AC line.

Almost all measurements will be made with one terminal connected to AC line

potential.

Most unit malfunctions will originate on the circuit card.

5.4.1 OVERALL TROUBLESHOOTING PROCEDURE

1. Check for obvious trouble such as input power failure, loose P1 or improper

jumpering.

2. Check the DC bias supplies.

a. 12 volts TP112-TP113

b. 15 volts TP114-TP115

c. 15 volts TP116-TP117

3. Check voltage between TP106 and TP113. This voltage should be adjustable

from 0 to 5 volts by the front panel control. If not, check P1 jumpering, Q103,

U105B and CR122.

4. Check voltage between TP111 and TP115. It should be proportional to

the 0 to 5 volts of step 3. If not, check U110B, T102, U106 and U105A.

5. Check voltage at the collector of Q104 (metal case) and TP115. It should be

above 12Vdc. If not, check the voltage at TP101, TP102, TP103, TP104,

anode CR112 and CR113 to TP113 to determine why Q104 is on.

6. Output not controllable. Check the following:

a. Pulses P104 (Pins 5 and 4) controllable by current control on front panel.

b. Pulses at U202 (Pin 7).

c. Pulses at junction of R209 & 210, R211 & 212 and R213 & 214.

d. Check Q201, Q202 and Q203.

7. IF Q201-Q203 have been changed, be careful to thoroughly clean the heatsink

and insulator. Then reapply a light coating of silicone heatsink compound.

Then evenly tighten the mounting screws.

Page 17 of 18

83-475-001 Rev. D

6 RECOMMENDED SPARE PARTS

6.1 RECOMMENDED SPARE PARTS LIST

This list covers the recommended spare parts for the ESKI supplies made by Electronic

Measurements, Inc.

60-044-002Rectifier 65ACR5

78-014-000BE0 & G10 RimInsulator

78-022-000Alum OxideInsulator

67-066-006NTC ResistorRT301

UC352464-006-003PW ModulatorU108

MC781264-010-001Regulator 12VU112

MC781564-010-002Regulator 15VU113, U114

T1L 11364-004-007Opto IsolatorU107, 103

LM35864-002-020Op-AmpU101, 3, 4, 5

U109, 10

UC390164-003-043ICU106, U111

MOC304164-008-007Opto IsolatorU301

2N634863-002-001TRIACQ301

20-395-000A100 PC BoardA100

53-002-012MOV 575 VACTH3

53-002-002MOV 250 VACTH1, TH2

51-002-002Fan 230 VACB1

5k Ohm67-055-007Current ControlR10

69-012-001800V Spark GapV1

66-105-002Ammeter/VoltmeterM1, M2

HCPC220064-002-014Opto IsolatorU210

TSC426CPA64-002-028DriverU2

IRF11063-009-008FETU204

IRFD912363-009-009FETU203

IX6M30N50A63-011-001Main Chopper XistorQ201, 2, 3

65-028-001Soft Start RelayK1

60-050-001Rect. 30A 600vCR4

MFR. NO.EM PART NO.DESCRIPTIONCIRCUIT REF.

Page 18 of 18

83-475-001 Rev. D

Lambda ESKI User manual

Brand: Lambda

Model: ESKI

Type: User manual

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Lambda ESKI User manual

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