User Manual
  51 & 52 Series II 
  Introduction 
  3 
Table 1. Safety Information (cont.) 
W Warning (cont.) 
•  Model 52: Measurement errors may occur if voltages on the measurement surfaces result in potentials 
greater than 1 V between the two thermocouples. When potential differences are anticipated between the 
thermocouples, use electrically insulated thermocouples. 
•  When servicing the thermometer, use only specified replacement parts. 
•  Do not use the thermometer with any part of the case or cover removed. 
Caution 
A Caution identifies conditions and actions that may damage the meter or the equipment under test. 
•  Use the proper thermocouples, function, and range for your thermometer. 
•  Do not attempt to recharge the batteries. 
•  To prevent explosion, do not throw batteries into a fire. 
•  Follow local laws or regulations when disposing of batteries. 
•  Match the + and − polarities of the battery with the battery case. 










