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Section 4

 

 

TM9340-G-00 
15 August, 2019 

4-1 

4.  OPERATION AND MAINTENANCE 

4.1.

 

OPERATION 

The  Model  9340  series  of  decade  boxes  are  calibrated  at  the  front  panel  red  and  black 
binding  posts.    The  accuracy  specification  is  determined  as  the  resistance  value  offset 
from the zero selection resistance value. 

Above 1 k

 selection the zero resistance value is negligible.  Below the 1 k

 selection 

the zero resistance value of the decade box needs to be taken into consideration to effect 
the specified accuracy. 

The  green  binding  post  case  ground  terminal  may  be  used  to  reduce  susceptibility  to      
electromagnetic and electrostatic influences. 

4.2.

 

MAINTENANCE AND CALIBRATION 

The Model 9340 series of decade boxes require minimal maintenance other than periodic 
calibration  and  ensuring  the  front  panel  terminals  are  clean.    Cleaning  may  be 
accomplished  by  wiping  with  ISO-propanol  and  allowing  to  dry  over  a  12  hour  period 
before use. 

Calibration  should  be  performed  using  a  6½  Digital  Multimeter  with  a  minimum 
accuracy  specification  of  better  than  ±20  ppm  over  the  range  of  1 

  to  10  M

.    A 

suitably  accurate  Teraohometer  is  required  for  models  with  resistance  ranges  above  1 
G

4.3.

 

REPAIR 

Although the Model 9340 series has been designed to operate for may years without the 
need  of  repairs,  circumstances  beyond  the  control  of  the  manufacturer  may  require 
replacement of specific resistor elements or entire decade switch assemblies. 

The screws in the top panel may be removed to allow access to the switching circuitry by 
carefully lifting the top panel assembly out of the bottom portion of the enclosure. 

Careful  soldering  so  as  not  to  overheat  the  switch  terminals  is  required  when  replacing 
specific resistance elements.  It is recommended that the defective resistance elements be 
cut  out  of the  circuit and that the replacement  element  be  attached  to a  short  portion of 
the element lead left in contact with the switch terminals.  This method will reduce any 
effects from applying heat to the circuit elements. 

It is recommended that the decade box be returned to Guildline Instruments if it should 
be necessary to replace an entire decade switch. 

Содержание 9340 Series

Страница 1: ...prietary to Guildline Instruments Limited They are to be used only as a guide to the operation and maintenance of the equipment with which this manual was issued and may not be duplicated or transmitt...

Страница 2: ...NAL DESCRIPTION 1 1 1 2 FEATURES 1 2 1 3 GENERAL THEORY 1 2 2 SPECIFICATIONS 2 1 3 RECEIPT AND INSPECTION 3 1 3 1 GENERAL 3 1 3 2 PACKAGING 3 1 4 OPERATION AND MAINTENANCE 4 1 4 1 OPERATION 4 1 4 2 MA...

Страница 3: ...TM9340 G 00 15 August 2019 ii TABLE OF FIGURES FIGURE 1 1 9340 SERIES OF RESISTANCE DECADE BOXES 1 1 FIGURE 1 2 DECADE BOX SCHEMATIC DIAGRAM 1 2...

Страница 4: ...TM9340 G 00 15 August 2019 iii LIST OF TABLES TABLE 2 1 MODEL SELECTION TABLE 2 2 TABLE 2 2 MODEL SPECIFICATIONS 2 4 TABLE 5 1 GENERAL ASSEMBLY PARTS LISTS 5 1...

Страница 5: ...niques established at Guildline in the construction and stabilizing of resistors and low uncertainty switching techniques used in many of our instruments The Model 9340 Series is available in decade r...

Страница 6: ...resistors switched in a series circuit Figure 1 1 illustrates schematically the circuit of the Model 9347 The Models 9343 9344 9345 9346 and 9347 are identical except for the number of decades The val...

Страница 7: ...0 001 ohm per decade after settling Breakdown Voltage 1500 Volts to case Dimensions 9343 11 8cm X 23 3cm X 10 3cm high 9344 11 8cm X 29 0cm X 10 3cm high 9345 11 8cm X 34 7cm X 10 3cm high 9346 11 8cm...

Страница 8: ...343 10G 3 10M 11 10 G 9344 100G 4 10M 111 1 G 9343 100G 3 100M 111 0 G 9344 1T 4 100M 1 111 T 9343 1T 3 1G 1 110T 9344 10T 4 1G 11 11 T 9343 10T 3 10G 11 10 T Model Number of Decades Minimum Step s Ma...

Страница 9: ...nimum Step s Maximum Value s 9347 100k 7 0 01 111 111 1 k 9347 1M 7 0 1 1 111 111 M 9347 10M 7 1 11 111 11 M 9347 100M 7 10 111 111 1 M 9347 1G 7 100 1 111 111 G 9347 10G 7 1k 11 111 11 G 9347 100G 7...

Страница 10: ...0 2 0 5 7 0 07 0 1 1 50 5 0 2 0 5 2 0 2 1 10 20 5 0 2 0 5 0 7 0 7 10 100 10 5 0 2 0 5 0 2 2 100 1 k 10 5 0 2 0 5 0 07 7 1 k 10 k 10 5 0 2 0 5 0 02 20 10 k 100 k 10 5 0 2 0 5 0 007 70 100 k 1 M 10 5 0...

Страница 11: ...ince the 1k Dial set to 7 Position is most significant dial used the accuracy would be 0 01 2 m for all the 9340 Dial Settings for the entire resistance output Example 2 A 9346 100M Decade Standard is...

Страница 12: ...mechanical damage when received Nevertheless you should perform an inspection for physical damage ensure all items on the packing list are present and test the instrument electrically as soon as poss...

Страница 13: ...al Multimeter with a minimum accuracy specification of better than 20 ppm over the range of 1 to 10 M A suitably accurate Teraohometer is required for models with resistance ranges above 1 G 4 3 REPAI...

Страница 14: ...11 02 PL 9343 1T 18680 12 02 PL 9344 10T 18697 12 02 PL 9343 10T 18680 13 02 PL 9345 1k 18630 01 02 PL 9346 10k 18660 01 02 PL 9345 10k 18630 02 02 PL 9346 100k 18660 02 02 PL 9345 100k 18630 03 02 P...

Страница 15: ...75 03 02 PL 10 Decade 18675 04 02 PL 100 Decade 18675 05 02 PL 1k Decade 18675 06 02 PL 10 k Decade 18675 07 02 PL 100 k Decade 18675 08 02 PL 1 M Decade 18675 09 02 PL 10 M Decade 18675 10 02 PL 100...

Страница 16: ...NGS Decade Box Drawing 9343 Decade Box General Assembly 18680 01 02 9344 Decade Box General Assembly 18697 01 02 9345 Decade Box General Assembly 18630 01 02 9346 Decade Box General Assembly 18660 01...

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