WPI DAM50 Instruction Manual Download Page 6

World Precision Instruments

INTRODUCTION

Differential amplification is of great importance in bioelectric 

recording to reduce the ever present effect of noise 

interference from power line induction. A well designed 

differential amplifier will significantly diminish power line 

(mains) noise. It is most essential that the preparation be 

connected with an electrode to a good electrical ground 

as well as to the grounding wire of the DAM50 itself. This 

should have the effect of greatly reducing electrostatically 

induced potential. In addition to the preparation ground, 

two differential input connections must be made via 

appropriate electrodes applied to the recording site so as to 

optimally record a bioelectric potential difference.

Parts list 

Contents 

DAM50 amplifier
3518 shielded cable (bare termination) (available in a package of two as P/N 3517).

300647 shielded cable for metal electrodes

Unpacking

Upon receipt of this instrument, make a thorough inspection of the contents and 

check for possible damage. Missing cartons or obvious damage to cartons should be 

noted on the delivery receipt before signing. Concealed damage should be reported 

at once to the carrier and an inspection requested. Please read the section entitled 

“Claims and Returns” on page 11 of this manual. Please contact WPI Customer 

Service if any parts are missing at 941.371.1003 or [email protected].

Returns:

 Do not return any goods to WPI without obtaining prior approval (RMA 

# required) and instructions from WPI’s Returns Department. Goods returned 

(unauthorized) by collect freight may be refused. If a return shipment is necessary, 

use the original container, if possible. If the original container is not available, use a 

suitable substitute that is rigid and of adequate size. Wrap the instrument in paper or 

plastic surrounded with at least 100mm (four inches) of shock absorbing material. For 

further details, please read the section entitled “Claims and Returns” on page 11 of 

this manual.

Summary of Contents for DAM50

Page 1: ...Instrumenting scienti c ideas WORLD PRECISION INSTRUMENTS DAM50 Differential Amplifier Serial No _____________________ www wpiinc com INSTRUCTION MANUAL 092618...

Page 2: ......

Page 3: ...ode A B 7 b Single ended configuration Mode A 7 B 5489 mini banana adaptor for glass 8 a Differential configuration Mode A B 8 b Single ended configuration Mode A 8 C 5447 2 mm adaptor for glass 9 a D...

Page 4: ...ii World Precision Instruments...

Page 5: ...N Cautions warn against actions that can cause damage to equipment Please read these carefully This symbol indicates a WARNING Warnings alert you to actions that can cause personal injury or pose a ph...

Page 6: ...electrodes Unpacking Upon receipt of this instrument make a thorough inspection of the contents and check for possible damage Missing cartons or obvious damage to cartons should be noted on the deliv...

Page 7: ...case Amplification is controlled by the GAIN selector switch Note that amplification is ten times larger in the AC mode than in the DC mode Electrode Impedance If electrodes of very high impedance are...

Page 8: ...4 World Precision Instruments Fig 1 GAINS This chart shows the standard 3dB frequency cutoff at maximum filter band pass...

Page 9: ...ent POWER is provided by two alkaline 9 volt batteries Battery operation results in lower internal noise level Batteries can be tested by activating the BAT CAL switch If a short tone is heard the bat...

Page 10: ...e 470 Ohms Battery Test 1 second audible tone Calibrator Signal 10 Hz square wave amplitude 100 V at 1000 and 10 000 1 mV at 100 and 10 DC Power 2 9V alkaline batteries supplied Input Cables 1 shielde...

Page 11: ...Instruments 7 M3301EH M3301R TM31A10 DAM50 RC1T 300647 M3301EH TM31A10 DAM50 MD4R 5052 M10 RC1T 300647 b Single ended configuration Mode A A 300647 Prewired cable for metal electrodes a Differential c...

Page 12: ...uments B 5489 mini banana adaptor for glass a Differential configuration Mode A B b Single ended configuration Mode A DAM50 DAM50 EP2 EP2 13620 13388 2505 2505 2505 5444 5444 5489 5489 3294 3294 MEH7W...

Page 13: ...recision Instruments 9 C 5447 2 mm adaptor for glass a Differential configuration Mode A B DAM50 13620 2505 5444 MEH7W10 MEH7W10 13620 RC1T 5447 b Single ended configuration Mode A DAM50 5447 5444 250...

Page 14: ...10 World Precision Instruments DECLARATION OF CONFORMITY...

Page 15: ...special or consequential arising from a failure of this product to operate in the manner desired by the user WPI shall not be liable for any damage to data or property that may be caused directly or i...

Page 16: ...ny Saarstra e 23 D 61169 Friedberg Hesson Germany Tel 49 0 6031 1602171 Fax 49 0 6031 1602180 E mail wpide wpi europe com China Hong Kong WPI Shanghai Trading Co Ltd Rm 25e No8 Dongfang Rd Pudong Dist...

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