[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR77]

[Page 635]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 77_MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK 
AREAS OF UNDERGROUND COAL MINES--Table of Contents
 
                        Subpart D_Thermal Dryers
 
Sec.  77.314  Automatic temperature control instruments.

    (a) Automatic temperature control instruments for thermal dryer 
system shall be of the recording type.
    (b) Automatic temperature control instruments shall be locked or 
sealed to prevent tampering or unauthorized adjustment. These 
instruments shall not be set above the maximum allowable operating 
temperature.
    (c) All dryer control instruments shall be inspected and calibrated 
at least once every 3 months and a record or certificate of accuracy, 
signed by a trained employee or by a servicing agent, shall be kept at 
the plant.