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7

OPERATING INSTRUCTIONS

SAFETY PRECAUTIONS

Use  only  a  polarized  3-wire  outlet.  This 
assure  s  that  the  poser  supply  chassis  and 
case  are  connected  to  a  good  earth  ground 
and reduces danger of electrical shock

There is little danger of electric shock from the power supply output, 

which produces a maximum of 30 volts dc. However, there may the great 
danger  of  electrical  shock  if  the  power  supply  output  is  connected  to  an 
external  high  voltage.  Some  equipment  being  powered  may  contain  high 
voltage and present a shock hazard. Observe caution. If the power supply 
output is floated (referenced to a voltage rather than earth ground) turn off 
the power supply and the equipment under test when making connections. 
Never  float  the  power  supply  to  a  potential  greater  than  100  volts  peak 
with respect to earth ground.

Observe all TEST INSTRUMENT SAFETY precautions listed in the 

front of this manual.

        

EQUIPMENT PROTECTION PRECAUTIONS

Avoid  using  the  power  supply  in  ambient  temperatures  above  +40°C 
(104°F). Always  allow  sufficient  air  space  around  the  opening  at  the  rear 
of  the  power  supply  and  the  top  and  side  vent  openings  for  effective  air 
flow  to  prevent  internal  heat  build-up.  Typically,  a  two  inch  space  at  the 
sides, as well as a six inch space at the top and rear of the power supply is 
adequate. DO NOT block the fan opening at the rear of the power supply 
or

the vent on top of the power supply. DO NOT place objects on top of the 
power supply.

Protection  provided  by  the  equipment  may  be  impaired  if  the 

equipment is used in a manner not specified by the manufacturer
 

Don't put this product to a position so that it is difficult to unplug the 

device from the appliance inlet

Unplug this product from the wall outlet before cleaning. Do not use 

liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning.

Although  the  power  supply  is  protected  against  overload  and  short 

circuits,  avoiding  these  conditions  in  regular  use  results  in  maximum 
stability and reliability.

Make certain that hook-up is as intended before turning power supply 

on. Incorrect polarity may damage the equipment being powered.

For indoor use only.

POWER SUPPLY HOOK-UP and OPERATION

Variable Voltage Output

1.

Turn off the power supply and equipment being powered.

NOTE

Use  solid  copper  hook-up  wire  of  at  least  18  gauge.  Using  smaller  wire 
may increase the source resistance "seen" by the load, thereby derating the 
regulation  capabilities  of  the  poser  supply. Tighten  connections  snugly  to 
assure low resistance.

CAUTION

www.calcert.com

[email protected]

1.800.544.2843

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Summary of Contents for 1670A

Page 1: ...INSTRUCTION MANUAL MODEL 1670A INSTRUCTION MANUAL MODEL 1670A Triple Output DC POWER SUPPLY www calcert com sales calcert com 1 800 544 2843 0 5 10 15 20 25 30...

Page 2: ...long after the equipment is turned off 2 Use only a polarized 3 wire ac outlet This assures that the power supply chassis case and ground terminal are connected to a good earth ground and reduces dang...

Page 3: ...t 7 Typical Constant Voltage Output 8 Setting Current Limit 8 Typical Constant Current Operation 8 Page Constant Voltage Current Characteristics 9 12 Vdc Output 9 5 Vdc Output 10 Dual or Triple Output...

Page 4: ...r these power supply is powering of circuit boards while troubleshooting Many circuit boards require two or three input voltages with the most common values being 5 volts and 12 volts These power supp...

Page 5: ...05 10 mV RIPPLE AND NOISE 5 mV rms CONSTANT CURRENT MODE LOAD REGULATION 0 4 10 mA LINE REGULATION 108 TO 132 VAC 0 4 10 mA RIPPLE AND NOISE 10 mA rms PROTECTION Current limiting short circuit protect...

Page 6: ...ECTION Short circuit protection thermal overload protection OUTPUT NO 3 VOLTAGE Fixed 5 VDC 5 CURRENT 0 to 500 mA continuous POLARITY Positive or Negative CONNECTORS Wire Clips LOAD REGULATION no load...

Page 7: ...ltage DIMENSIONS H x W x D 4 9 x 8 5 x 9 5 124 x 216 x 242mm WEIGHT approx 10 lbs 4 5 kg ACCESSORIES SUPPLIED Instruction Manual Spare fuse OPTIONAL ACCESSORIES Power Supply Hook up Cables Model TL 5A...

Page 8: ...A Meter Indicates output current of variable supply 7 V Meter Indicates output voltage of variable supply 8 OUTPUT Terminal Red Positive polarity output terminal 9 OUTPUT Terminal Black Negative polar...

Page 9: ...CONTROLS AND INDICATORS 14 15 16 Figure 1 Front Panel Controls and Indicators Model 1670A Figure 2 Rear Panel Model 1670A 6 www calcert com sales calcert com 1 800 544 2843 0 5 10 15 20 25 30...

Page 10: ...lly a two inch space at the sides as well as a six inch space at the top and rear of the power supply is adequate DO NOT block the fan opening at the rear of the power supply or the vent on top of the...

Page 11: ...he output current Setting Current Limit 1 Determine the maximum safe current for the device to be powered 2 Rotate the VOLTAGE control away from zero until some low voltage under 1 volt is indicated 3...

Page 12: ...the point where the preset current limit is reached At that point the output current becomes constant and the output voltage drops in proportion to further increases in load The crossover point is ind...

Page 13: ...ound and each other thus each output may be connected for the either positive or negative polarity A typical example of a triple output application would be powering a circuit board that requires thre...

Page 14: ...xample of Triple Output Hook up for 5V 12V and 12V Figure 5 Connecting Outputs in Series for Variable 17 to 47 volt output OPERATING INSTRUCTIONS www calcert com sales calcert com 1 800 544 2843 0 5 1...

Page 15: ...e of the correct rating The fuse is located on the rear panel see Fig 2 LINE VOLTAGE 115V 230V FUSE VALUE F3AL250V F1 6AL250V INSTRUMENT REPAIR SERVICE Because of the specialized skills and test equip...

Page 16: ...the device Customers not on open account must include payment in the form of a money order or credit card For the most current repair charges please visit and click on service repair Return all merch...

Page 17: ...ng a warranty registration form online at within fifteen 15 days of purchase Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alter...

Page 18: ...t is connected to an ac outlet even if the equipment is turned off 7 B K Precision products are not authorized for use in any application involving direct contact between our product and the human bod...

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