Page 1: ... I I ...
Page 2: ...g i n Z l lwhmmu r tExs Modal 4 3 1 8 fo ae a b h h g ease aregfven graphkeay fh ag4lre 2 4 2 S RACK MQ ftlJQ b St the u mni ale l wifs 2 I nthe frome 2 4 i 1 u 3 6 l a o c Phrcethe spacerohps 3 betmenlnstnmew U r S d P f O l l b b b Q O b EeWm0 h u m d f n r t t h t h b r d o n i t i d Phca spacer clamps 4 on the two end inatnr itopmBebsetb uPrPClrmacntsdT eombSatnP ...
Page 3: ...cturers Association NEMA rec ommends that the instrument panel and cabinet be grounded All Hewlett Packard instruments are equipped with a three conductor power cable which when plugged into an appropriate receptacle grounds the instrument The offset pin on the power cable three prong connector is the ground wire 2 11 To preserve the protection feature when oper ating the instrument from a two con...
Page 4: ...on procedure given in figure 3 2 with POWER at AC if the procedure checks out normally proceed to step c a ADAPTER FRAME Qe 0 0 0 SPACER CLAMP RETAINING SCREWS Figure 2 4 Two Half Modules in Rack Adapter c Repeat turn on procedure given in figure 3 2 with POWER at BATTERY ON If operationis not the same a s that obtained with ac power applied refer to paragr 5 40 Battery and Charging Checks 2 17 RE...
Page 5: ...he mount thermistors into their respective bridges within the power meter 4 MOUNT FES This two position slide switch sets the power meter to accommodate therm istor mounts of 100 or 200 ohm n o m i n a l resistance 5 Z E R O and VERNIER The ZERO c o n t r o l coarsely sets the meter pointer near zero the VERNIER control is a more exact adjustment which sets the meter pointer on zero 6 In Option 02...
Page 6: ...needs recharging Refer to paragraph 3 11 8 Set RANGE switch to the power range to be used and zero set the meter with ZERO and VERNIER controls Note Zero set accuracy of 0 5 of full scale can be obtained by zero settingthe meter on the most sensitive range 01 mw only and assumingthe meter is properly zeroed on all less sensitive ranges For maximum accuracy zero set the meter on the range to be use...
Page 7: ...he substi the voltage is measured across 1000 ohms tution measurement This current is Id Note 7 Calculate power in mw from the expression A second digital voltmeter in parallel with a 1000 ohm lo 1watt resistor 2 connected in series with the RECORDER Power MW I dc Rd output of the Model 431B will increase accuracy of reference duplication 4 lo3 where Rd operating resistance of the term 4 Turn off ...
Page 8: ...as a 3 n w e g ...
