A
LAMBDA
LAMBDA ELECTRONICS
MELVILLE, L. I., N. Y.
INSTRUCTION MANUAL
FOR
REGULATED POWER SUPPLIES
LDS-Y-SERIES
This manual provides instructions intended for the operation of Ltunbda pKJwer supplies, and is not to be
reproduced without the written consent of Lambda Electronics. All information contained herein applies
to all LDS-Y models unless otherwise specified.
LAMBDA ELECTRONICS MELVILLE, L.I., N.Y.
» IM-LDS-Y
MAIN PLANT TELEPHONE: 516-694-4200
TABLE OF CONTENTS
Section Page
SPECIFICATIONS AND FEATURES 1
OPERATING INSTRUCTIONS 4
Basic Mode of Operation 4
Connections for Operation 4
Supply Load Connections 4
Mounting of L-6-OV Overvoltage Protector Accessory 5
Mounting of LH OV Overvoltage Protector Accessory 6
Operation After Protective Device Shutdown 6
MAINTENANCE 6
General 6
Trouble Analysis 6
Checking Transistors £md Capacitors 6
Printed Circuit Board Maintenance Techniques 7
Performance Checks 7
Adjustment of Calibration Control R105 8
SERVICE 8
PARTS ORDERING 8
IM-LDS-Y
SPECIFICATIONS AND FEATURES
D.
C. OUTPUT — Voltage regulated for line and load. See table I for voltage and current ratings.
TABLE I
MAXIMUM CURRENT (AMPS)*
AT AMBIENT TEMPERATURE
VOLTAGE
MODEL
RANGE
40°C
50° C
60° C
INPUT
POWER
(WATTS)**
LDS-Y-5-0V
LDS-Y-12
LDS-Y-15
LDS-Y-20
LDS-Y-24
LDS-Y-28
LDS-Y-48
LDS-Y-01
LDS-Y-02
LDS-Y-03
LDS-Y-100
LDS-Y-120
LDS-Y-150
Current range must be chosen to suit the appropriate maximum eunbient temperature. Ciurent ratings
apply for entire voltage range.
*Ratings apply for use with cover removed. Use ratings in parentheses when unit is used with cover.
Refer to figure 12 for cover removal.
**With output loaded to full current rating and input voltage 127 volts AC, 60 Hz.
tWith or without cover.
5 ±5%
12 ± 5%
15 ±5%
20 ± 5%
24 ± 5%
28 ± 5%
48 ± 5%
0-7
0-18
0-32
100 ± 5%
120 ± 5%
150 ± 5%
5.4 (5.0)
3.7 (3.4)
3.25 (3.00)
2.5 (2.25)
2.1 (1.9)
1.9 (1.65)
1.3 (1.2)
3.4 (3.4)
1.8 (1.8)
1.1 (1.1)
0.55t
0.45t
0.35t
4.4 (4.0)
2.9 (2.55)
2.50 (2.25)
2.0 (1.80)
1.70(1.55)
1.5 (1.35)
1.05(0.95)
2.9 (2.85)
1.60(1.60)
1.0 (0.95)
0.45t
0.35t
0.25t
3.3 (3.0)
2.0 (1.75)
1.7 (1.55)
1.5 (1.35)
1.3 (1.15)
1.10(1.00)
.75 (0.70)
2.4 (1.80)
1.4 (0.90)
0.80 (0.60)
0.35t
0.25t
0.15t
110
120
120
125
125
130
155
100
110
110
110
110
110
REGULATED VOLTAGE OUTPUT
Regulation (Line) 0.005%+0.5 mV for input variations from 105-127,127-105,
210-254, or 254-210 volts AC.
Regulation (load) 0.005% +0.5 mV for load variations from no load to full load
or full load to no load.
150
MV
Ripple and Noise
Temperature Coefficient
IM-LDS-Y
Y-48 and LDS-Y-01, 02, 03; 250
for LDS-Y-100, 120, 150 with either positive or negative
terminal pounded.
Output change in voltage ±(0.005% +10 MV)/°C on 01, 02, 03
with extemal programming resistors.
01,
150 V units.
rms, 1 mV peak to peak for LDS-Y-5-OV thru - LDS-
MV
rms, 1 mV peak to peak
±(0.01%
02, 03 with intemal programming resistors and on 5V thru
+10 tiV)/°C on
Remote Programming
Extemal Resistor Nominal 1000 ohms/volt output. Downward programming to
voltages less than 1.0 volt must be accomplished in two steps;
first, from original voltage value to 1.0 volt, and then from 1.0
volt to final desired value.
Programming Voltage One-to-one voltage change.
Remote Sensing Provision is made for remote sensing to eliminate effect of
power output lead resistance on DC regulation.
OVERSHOOT — No overshoot under conditions of power tum-on,
AC INPUT — 105-127 or 210-254 volts AC at 47-440 Hz, Standard LDS-Y power supplies are factory
wired for 105-127 volt input, but can be rewired for 210-254 volt input. See figure 8 and schematic
diagram for rewiring of AC input. For input power see table I. Ratings apply for 57-63 Hz input. For
47-53 Hz or 63-440 Hz input consult factory. Where applicable, regulatory agency approval applies only
for input voltages up to 250VAC.
OVERLOAD PROTECTION
Thermal Thermostat, resets automatically when over temperature con-
dition is eliminated.
Electrical Automatic electronic ciurent limiting circuit, limits output
current to a safe value. Automatic current limiting protects
the load and power supply when extemal overloads and direct
shorts occur.
OVERVOLTAGE PROTECTION - Model LDS-Y-5-OV includes a fixed buUt-in overvoltage protection
circuit which prevents damage to the load caused by excessive power supply output voltage. Overvoltage
protection range varies between 6.4 and 6.8 volts D.C.
INPUT AND OUTPUT CONNECTIONS - Refer to figure 12 for location.
AC input Screw terminals on printed circuit board
turn-off,
or power failure.
Ground 6-32 stud on printed circuit board
DC output Screw terminals on printed circuit board
Sensing Screw terminals on printed circuit board
OPERATING AMBIENT TEMPERATURE RANGE AND DUTY CYCLE - Continuous duty from 0°C to
60° C ambient with conesponding load current rating for all modes of operation.
STORAGE TEMPERATURE (non operating) - -55° C to
TRANSFORMER - MIL-T-27C, Grade 6; electrostatic shield; 4,000 VAC input/output isolation.
FUNGUS — All LDS-Y power supplies are fungus inert.
+85° C
IM-LDS-Y
SPECIFICATIONS AND FEATURES
D.
C. OUTPUT — Voltage regulated for line and load. See table I for voltage and current ratings.
TABLE I
MAXIMUM CURRENT (AMPS)*
AT AMBIENT TEMPERATURE
VOLTAGE
MODEL
RANGE
40°C
50°C
60°C
INPUT
POWER
(WATTS)**
LDS-Y-5-0 V
LDS-Y-12
LDS-Y-15
LDS-Y-20
LDS-Y-24
LDS-Y-28
LDS-Y-48
LDS-Y-01
LDS-Y-02
LDS-Y-03
LDS-Y-100
LDS-Y-120
LDS-Y-150
CXurent range must be chosen to suit the appropriate maximum Eimbient temperature. Current ratings
apply for entire voltage range.
*Ratings apply for use with cover removed. Use ratings in parentheses when unit is used with cover.
Refer to figure 12 for cover removal.
**With output loaded to full cunent rating and input voltage 127 volts AC, 60 Hz.
tWith or without cover.
5± 5%
12 ± 5%
15 ± 5%
20 ± 5%
24 ± 5%
28 ± 5%
48 ± 5%
0-7
0-18
0-32
100 ± 5%
120 ± 5%
150 ± 5%
5.4 (5.0)
3.7 (3.4)
3.25 (3.00)
2.5 (2.25)
2.1 (1.9)
1.9 (1.65)
1.3 (1.2)
3.4 (3.4)
1.8 (1.8)
1.1 (1.1)
0.55t
0.45t
0.35t
4.4 (4.0)
2.9 (2.55)
2.50 (2.25)
2.0 (1.80)
1.70(1.55)
1.5 (1.35)
1.05(0.95)
2.9 (2.85)
1.60(1.60)
1.0 (0.95)
0.45t
0.35t
0.25t
3.3 (3.0)
2.0 (1.75)
1.7 (1.55)
1.5 (1.35)
1.3 (1.15)
1.10(1.00)
.75 (0.70)
2.4 (1.80)
1.4 (0.90)
0.80 (0.60)
0.35t
0.25t
0.15t
110
120
120
125
125
130
155
100
110
110
110
110
110
REGULATED VOLTAGE OUTPUT
Regulation (Line) 0.005%+0.5 mV for input variations from 105-127,127-105,
210-254, or 254-210 volts AC.
Regulation (load) 0.005% +0.5 mV for load variations from no load to full load
or full load to no load.
150
MV
Ripple and Noise
Temperature Coefficient
IM-LDS-Y
Y-48 and LDS-Y-01, 02, 03; 250
for LDS-Y-100, 120, 150 with either positive or negative
terminal grounded.
Output change in voltage ±(0.005% +10 MV)/°C on 01, 02, 03
with extemal programming resistors.
01,
150 V units.
rms, 1 mV peak to peak for LDS-Y-5-0V thru - LDS-
MV
rms, 1 mV peak to peak
±(0.01%
02, 03 with intemal programming resistors and on 5V thru
+10 MV)/°C on
Remote Programming
Extemal Resistor Nominal 1000 ohms/volt output. Downward programming to
voltages less than 1.0 volt must be accomplished in two steps;
first, from original voltage value to 1.0 volt, and then from 1.0
volt to final desired value.
Programming Voltage One-to-one voltage change.
Remote Sensing Provision is made for remote sensing to eliminate effect of
power output lead resistance on DC regulation.
OVERSHOOT — No overshoot under conditions of power tum-on,
AC INPUT — 105-127 or 210-254 volts AC at 47-440 Hz. Standard LDS-Y power supplies are factory
wired for 105-127 volt input, but can be rewired for 210-254 volt input. See figure 8 and schematic
diagram for rewiring of AC input. For input power see table I. Ratings apply for 57-63 Hz input. For
47-53 Hz or 63-440 Hz input consult factory. Where applicable, regulatory agency approval applies only
for input voltages up to 250VAC.
OVERLOAD PROTECTJON
Thermal Thermostat, resets automatically when over temperature con-
dition is eliminated.
Electrical Automatic electronic current limiting circuit, limits output
current to a safe value. Automatic current limiting protects
the load and power supply when extemal overloads and direct
shorts occur.
OVERVOLTAGE PROTECTION - Model LDS-Y-5-OV includes a fixed built-in overvoltage protection
circuit which prevents damage to the load caused by excessive power supply output voltage. Overvoltage
protection range varies between 6.4 and 6.8 volts D.C.
INPUT AND OUTPUT CONNECTIONS - Refer to figure 12 for location.
AC input Screw terminals on printed circuit board
turn-off,
or power failure.
Ground 6-32 stud on printed circuit board
DC output Screw terminals on printed circuit board
Sensing Screw terminals on printed circuit board
OPERATING AMBIENT TEMPERATURE RANGE AND DUTY CYCLE - Continuous duty from 0°C to
60° C ambient with conesponding load current rating for all modes of operation.
STORAGE TEMPERATURE (non operating) -
TRANSFORMER — MIL-T-27C, Grade 6; electrostatic shield; 4,000 VAC input/output isolation.
FUNGUS — All LDS-Y power supplies are fungus inert.
-55° C
to +85°C
IM-LDS-Y
DC OUTPUT CONTROL — Screwdriver voltage adjust control permits adjustment of DC output voltage.
Refer to figure 12 for location of control. On vdde range models, an adjustable range of 1%
VQ
max is provided by the intemal programming potentiometer; programming over the full 0 to V^ max
range can be accomplished by remote programming.
PHYSICAL DATA
Size 5-5/8" x 4-7/8" x 2-5/8" with cover in place
5-5/8" X 4-7/8" X 2-1/2" with cover removed
Weight 5-1/2 lbs. net; 6 lbs. shipping
Finish Gray, FED. STD. 595 No. 26081
MOUNTING — Three surfaces, two with tapped mounting holes and one with clearance mounting holes,
can be utilized for mounting this unit. Two mounting surfaces on LDS-Y-01 thru 03 and LDS-Y-48
when used with optional LH OV series overvoltage protectors. Air circulation is required when unit is
mounted in confined areas. Refer to figure 12 for mounting details.
ACCESSORIES
Overvoltage Protector Intemally mounted L-6 OV series Overvoltage Protectors for
LDS-Y-5 thru LDS-Y-28 and LH OV series adjustable overvoltage protectors for LDS-Y-01 through LDS-Y-03 and
LDS-Y-48 are available.
VQ
max to
Use a S.OA, 250V Norm-Blo fuse (not supplied in unit) in AC input line for 110 VAC input.
Use a 1.5A, 250V Norm-Blo fuse in AC input line for 220 VAC input.
IM-LDS-Y
OPERATING INSTRUCTIONS
BASIC MODE OF OPERATION
This power supply operates as a constant voltage source provided the load cunent does not exceed the
rated value at 40°C. For continuous operation, load cunent must not exceed the rating for each ambient
temperature. When load exceeds 105% of 40°C rating, both voltage and cunent decrease until voltage
reaches zero and the cunent at short circuit equals approximately 40 percent or less of the rated current.
(For wide range models 01, 02, and 03, short circuit current equals the rated current)
CONNECTIONS FOR OPERATION
NOTE: Make all connections to the unit before applying AC input power.
Ground Connections. The Lambda power supply can be operated either with negative or positive output
terminal grounded. Both positive and negative ground coimections are shown for all suggested output
cormections illustrated in this manual.
Connection Terminals. Make aU connections to the supply at the terminals provided. Apply input power
to AC terminals; always coimect the ungrounded (hot) lead to terminal indicated in figures 3 through 9.
The supply positive terminal is brought out to terminal +V. The supply negative terminal is brought
out to terminal -V. Recommended wiring of the power supply to the load and selection of wiring is shown
in figures 1 through 9. Selection of proper wiring is made on the basis of load requirements. Make all performance checks as shown in figure 11. Connect measuring devices directly to terminals or use the shortest
leads possible.
SUPPLY LOAD CONNECTIONS
Connections for Operation as a Constant Voltage Source
The output impedance and regulation of the power supply at the load may change when using the sup-
ply as a constant voltage source and connecting leads of practical length are used. To minimize the effect
of the output leads on these characteristics, remote sensing is used. Recommended types of supply-load
connections with local or remote sensing are described in the following paragraphs.
Refer to figure 1 to detennine voltage drop for particular cable length, wire size and current condi-
tions.
Lead lengths must be measured from supply terminals to load terminals as shown in figure 2.
Local Sensing Connection, Figure 3. Local sensing is the connection suitable for application with relatively constant load or for applications with short power output leads.
Remote Sensing Connection, Figure 4. Remote sensing provides complete compensation for the DC voltage
drops in the connecting cables. Sensing leads should be a twisted pair to minimize AC pick-up. A 2.5 mf,
elect., capacitor may be required between output terminals and sense terminals to reduce noise pick-up.
Programmed Voltage Connections, Using Extemal Resistor, Figure 5. Discrete voltage steps can be programmed with a resistemce voltage divider valued at 1000 ohms/volt change and shorting-type switch as
shown in Figure 5. When continuous voltage variations are required, use a variable resistor with the same
1000 ohms/volt ratio in place of the resistive voltage divider and shorting-type switch. Use a low temperature
coefficient resistor to assure most stable operation . On wide range models, downward programming to
voltages less than 1 volt must be accomplished in two steps; first, from original voltage value to 1.0 volt,
and then from 1.0 volt to final desired value.
IM-LDS-Y
Before programming, adjust programming resistor for zero resistance and set voltage adjust control to the
minimum rated output voltage. Output voltage of programmed supply will be minimum output voltage
plus 1 volt per lOOC) ohms.
As shown in figure 5, voltages can be programmed utilizing either local or remote sensing connections,
as desired.
Programmed Voltage Connections Using Programming Voltage, Figure 6. The power supply voltage output
can be programmed with an extemally connected programming power supply. The output voltage change
of the programmed supply will maintain a one-to-one ratio with the voltage of the programming supply. If
the output voltage control of the programmed supply is set to minimum output voltage, output voltage of
programmed supply will be minimum output voltage plus voltage of programming supply.
The programming supply must have a reverse cunent capability of 2 ma. minimum.
Altematively, when supplies with less than 2 ma. reverse cunent capability are used, a resistor capable
of drawing 2 ma. at the minimum programming volteige must be connected across the output terminals of
the supply. This programming supply must be rated to handle all excess resistor cunent at the maximum
programming voltage.
Connections For Series Operation, Figure 7.
The voltage capabiltiy of LDS-Y power supplies can be extended by series operation. Figure 7 shows
the connections for either local or remote sensing in a series connection where the voltage control of each
unit functions independently to control the output.
A diode, having a current carrying capability equal to or greater than the maximum cunent rating of
the supply, must be used and connected as shown in figure 7. The diode blocking voltage should be at least
twice the maximum rated output voltage of the supply. See table I, of "Specifications and Features", for
power supply cunent and voltage ratings.
Connections For Parallel Operation, Figure 9 (Applicable only to LDS-Y-Ol — LDS-Y-03)
The current capability of LDS-Y power supplies can be extended by parallel operation of LDS-Y power
supplies of equal* voltage capacities voltage capacities.
Units "M" and "S" are shown connected for parallel operation in figures 9A and 9B. One power
supply, designated the "M" unit, controls its own output as well as the output of the second power supply,
designated the "S" unit.
*For applications using supplies of unequal voltage ratings, consult factory for details of operation.
Unit S operates to regulate its current in a ratio to that of the M unit by comparing the cunent in its
intemal sampling resistor with that current sampled by the master intemal sampling resistor.
CAUTION: Always set "S" unit voltage control to zero (fully CCW) during parallel operation,
otherwise excessive current will flow throught "M" unit voltage control.
MOUNTING OF L-6-OV OVERVOLTAGE PROTECTOR ACCESSORY
Mount overvoltage protector to the power supply using two 6-32 x 1/2" pan head screws, two #6 flat
washers, one #6 split lockwasher, one #6 intemal tooth solder lug, and two 6-32 hex nuts. Overvoltage protector case must be insulated from power supply chassis. Use TO-3 insulating wafer coated on both sides
with Dow Coming no. 340 silicone grease and transistor mount (Accessories For Electronics Inc. part no.
AEM-3HD-WOB or equivalent).
IM-LDS-Y 5
Use a TVM, John Fluke Model 931AB or equivalent, to measure rms ripple voltage of the power
supply DC output. Use oscilloscope to measure peak-to-peak ripple voltage of the power supply DC
output.
ADJUSTMENT OF CALIBRATION CONTROL R105
Whenever R104, R105, R106, R122, R109, RllO or ICIOI are replaced, and voltage and current
indications do not reflect maximum ratings, adjust R105 as follows. The adjustment procedure requires
that the power supply is removed from associated equipment, is at an ambient temperature of 25-30°C,
and is stabilized and not operating.
1.
Remove AC input power to the supply.
2.
Break seal on wiper of R105 from resistor housing.
3.
Operate power supply for constant voltage with local sensing, connected as shown in figure 3,
with no extemal load.
4.
Tum voltage adjust control until minimum rated output voltage is obtained.
5.
Apply load so that output current is 105% of
tum RIO5 CW in order to achieve this value of cunent.
6. Using a DVM John Fluke 891A or equivalent, observe output voltage while adjusting R105 in
CCW direction. Adjust R105 until output voltage begins to decrease.
40° C
rating for the unit. It may be necessary to
7.
Tum voltage adjust control until maximum rated output voltage is obtained.
8. Increase load. Maximum attainable load cunent shall not exceed 110% of 40°C rating for the
unit.
9. After adjustment is completed, remove AC power input to the supply and use glyptol sealant to
seal wiper of R105 (R104) to resistor housing.
10.
After sealing, check setting and repeat adjustment procedure if required.
SERVICE
When additional instructions are required or repair service is desired, contact the nearest Lambda
office where trained personnel and complete facilities are ready to assist you.
Please include the power supply model and serial number together with complete details of the problem. On receipt of this information Lambda will supply service data or advise shipping for factory repair
service.
All repairs not covered by the wananty will be billed at cost and an estimate forwarded for approval
before work is started.
PARTS ORDERING
Standard Components and special components used in the Lambda power supply can be obtained
from the factory. In case of emergency, critical spare parts are available through any Lambda office.
IM-LDS-Y
The following information must be included when ordering parts:
1.
Model number and serial number of power supply and purchase date.
2.
Lambda part number.
3.
Description of part together with circuit designation.
4.
If part is not an electronic part, or is not listed, provide a description, function, and location,
of the part.
IM-LDS-Y
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AC INPUT
105-127 VAC
, 210-254VAC
4-
47-440 Hz
OR
® O
1.
MM
^^
Figure 1. Cable Connection Chart
4
1 A 1
+
nr »,
POWER
SUPPLY
-oc»-
Figure 2. Cable Length "A" in Feet
-S -V +V +S
-^T
5 10 15 20
CABLE LENGTH 'W IN FEET (SEE FIG. 2)
1
1
>
AC INPUT
105-127 VAC
OR
210-254 VAC
47-440 Hz
® O
9
LOAD
MMM
1
25
-S -V +V +S
LOAD
M CONNECT UNGROUNDED (HOT)LEAD
TO THIS TERMINAL.
MM FOR NEGATIVE GROUND, DISCONNECT
JUMPER FROM TERMINALS -FVa*
AND RECONNECT TO TERMINALS -V 8 ••
Figure 3. Local Sensing Connection.
LOAD
M CONNECT UNGROUNDED (HOT) LEAD
TO THIS TERMINAL.
M M A 2.5MF, ELECT .CAR MAY BE REQUIRED.
MMM FOR NEGATIVE GROUND.DISCONNECT
JUMPER FROM TERMINALS -HVa i
AND RECONNECT TO TERMINALS -V 8 4^.
Figure 4. Remote Sensing Connection.
AC INPUT
105-127 VAC
, 210-254 VAC
4:
47-440 Hz RP-S
o
f\
OR
®
o po
JL*J*
J
-V +V +S PO
o
AC INPUT
105-127
, 210-254 VAC
4r 47-440HzRP- S -V +V +S PO
O ® O
u *L?*L
VAC
OR
oy
MMM I
MMj
OO
MM
&
LOAD
^
-Ht-
2.5 MF
200V
(A) LOCAL SENSING
MCONNECT UNGROUNDED (HOT) LEAD TO THIS TERMINAL.
M M
A 2.5
MF.
MMM FOR NEGATIVE GROUND. DISCONNECT JUMPER FROM
TERMINALS -l-Va ^ AND RECONNECT TO TERMINALS -VS i.
-FCN LDS-Y-01,02,03 ONLY.USE TERMINAL RP INSTEAD OF-Sl
-S IS LEFT OPEN ON THESE MODELS.
Figure 5. Programmed Voltage, With Extemal Resistor.
ELECT.CAP MAY BE REQUIRED.
LOAD
^
^(r
2.5MF
200V
(B) REMOTE SENSING
AC INPUT
105-127 VAC
OR
210-254 VAC
47-440 Hz RP
•S -V +V +S PO
?^^?.?-?-m
LOAO
(A) LOCAL SENSING
Figure 6. Programmed Voltage, With Extemal Programming Voltage Source.
PROGRAMMING
VOLTAGE
M MA2.5MF.ELECT.CAP MAY BE REQUIRED.
MMM FOR NEGATIVE GROUND DISCONNECT JUMPER FROM
AC INPUT
105-127 VAC
OR
210-254 VA
:^
M
CONNECT UNGROUNDED (HOT) LEAD TO THIS TERMINAL.
TERMINALS -l-va -# AND RECONNECT TO TERMINALS -V 8 •^.
+ 0NLDS-Y-01,02,03 ONLY.USE TERMINAL RP INSTEAD OF -S;
-S IS LEFT OPEN ON THESE MODELS.
^ IP
-SRP-S
-' o +V +S PO
(B) REMOTE SENSMG
AC INPUT
105-127 VAC
I 210-254 VAC
i 47-440 Hz -S -V +V -fS
OR
(^ ® O OOOO
^
LOAD LOAD
(A)LOCAL SENSING
AC INPUT
105-127 VAC
OR
210-254 VAC
47-440 Hz
O
-S -V +V +8
AC INPUT
105-127 VAC
I 210-254 VAC
i 47-440 Hz
" 0O
9
\
' J<itC
OR
•
AC INPUT
105-127 VAC
S -V +V -l-S
Q QQ
I _
^
LOAD
(B) REMOTE SENSING
M
CONNECT UNGROUNDED (HOT)LEAD TO THIS TERMINAL.
MMA2.5MF.ELECT,CAR MAY BE REQUIRED.
MMMMAKE ONLY ONE GROUND CONNECTION FOR SERIES
COMBINATION. TO CHANGE GROUND AS SHOWN,REMOVE
JUMPER FROM -FVa ^ ON RIGHT UNIT AND CONNECT
ANY ONE OF THE OTHER JUMPERS AS SHOWN IN DOTTED
LINE.
I 210-254 VAC
•k 47-440 Hz
9 ® o
MMM
Figure 7. Series Connection.
-S -V +V +S
09 QQ
* ^^^
»
LOAD
CONNECTION SHOWN IS FOR 105-127
INPUT, DISCONNECT BLKa WHT TRANSFORMER LEADS
FROM TERMS ACia AC2 AND RECONNECT BOTH LEADS
TO TERM D.
VAC FOR
210-254
V
Figure 8. Transformer Connections for AC Input Conversion.
5 -Year
Guarantee
We warrant each instrument manufactured
us,
and
sold
by us or our
free from defects
that
it
will perform within applicable specifications
for a period
obligation under this guarantee
or replacing
and fuses) which shall, within five years after delivery
the original purchaser,
charges prepaid, prove after
We reserve
to make modifications
obligation
the
to
make such modifications
of
five years after original shipment.
any
Instrument
right
to
discontinue instruments without notice,
in
LAMBDA
In
be
design
authorized agents,
material
returned
our
and
or
part thereof, (except tubes
examination
at any
to
ELECTRONICS
515 BROAD HOLLOW ROAD • MELVILLE,
by
to be
workmanship,
is
limited
to us
with transportation
to be
time without incurring
instruments previously
L.I., NEW
and
to
repairing
thus defective.
YORK • 516-694-4200
Our
to
and
any
sold.
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