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Page 2: ...facility giving full details of the difficulty and include the model number type number and serial number On receipt of this information service data or shipping instructions will be forwarded to you...
Page 3: ...84 5A iii...
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Page 5: ...ding RANGE TIME 1 microvolt 5 seconds 3 microvolt 3 seconds 10 microvolt 1000 volt 1 1 2 seconds INPUT ISOLATION Better than 1012 ohms at less than 50 relative humidity and 25 C regardless of line cha...
Page 6: ...factor of two DC Common Mode Rejection derated by 20 db STORAGE TEMPERATURE RANGE Model 845A 40 C to 70 C Model 845AB 40 C to 60 C RELATIVE HUMIDITY RANGE 0 to 80 SHOCK Meets hammer blow requirements...
Page 7: ...otice explains how you can minimize the chances of destroying such devices by 1 Knowing that there is a problem 2 Learning the guidelines for handling them 3 Using the procedures and packaging and ben...
Page 8: ...SS DEVICES 9 HANDLE S S DEVICES ONLY AT A STATIC FREE WORK STATION 10 ONLY ANTI STATIC TYPE SOLDER SUCKERS SHOULD BE USED 11 ONLY GROUNDED TIP SOLDERING IRONS SHOULD BE USED Anti static bags for stori...
Page 9: ...switch to the 1 MI CROVOLT RANGE and re zero with the ZERO control c Place the Model 84SAB controls as follows POWER LINE OPR or BAT OPR RANGE 10 MICROVOLTS OPR ZERO d Adjust the ZE RO control for an...
Page 10: ...ent is ready for operation as a voltmeter or null detector Screwdriver adjustment used to set the meter to zero INPUT AND COMMON Provides connection to voltage being measured This terminal is usually...
Page 11: ...to the Model 845 INPUT terminal and connect the common point of the voltage being measured to the Model 845 COM MON terminal c Deflection of the meter indicates the polarity and magnitude of the meas...
Page 12: ...d as follows 2 17 MEASURING VOLTAGES WITH A STANDARD CELL 2 18 The Model 845 may be used with a voltage di vider and a standard cell to calculate unknown voltages with a high degree of accuracy Connec...
Page 13: ...DANCE 2 30 Due to the very high input resistance and ex treme sensitivity of the Model 845 it is charge sensi tive Thus a person s body potential an electrostatic voltage can cause charge redistributi...
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