TM 5-3610-257-14
CHAPTER 10
SUPPORT ITEMS
Section I. INTRODUCTION
10-1.
GENERAL INFORMATION.
10-1.1. Scope.
This chapter covers the support items contained in the Camera Section. The support items consist of
the following equipment:
Model 314 Mason-Type Psychrometer
Invar Bar and Beam Compass
Utility Pump
10-2.
EQUIPMENT DESCRIPTION.
10-2.1. Equipment Characteristics, Capabilities, and Features.
a.
Model 314 Mason-type Psychrometer. Has both wet and dry bulbs, with cistern and wicks. Measures relative
humidity.
b.
Invar Bar and Beam Compass. Used for precision measurements of linear distances.
c.
Utility Pump. Used to fill water storage tank.
10-2.2. Equipment Data.
a.
Model 317 Mason-Type Psychrometer. Range 20°F to 120°F (-7°C to 49°C).
b. Invar Bar and Beam compass. Calibrated in inches and centimeters.
c.
Utility Pump. 1/2 hp, self-priming, centrifugal pump operates on 120 V ac.
10-3.
TECHNICAL PRINCIPLES OF OPERATION. Principles of operation are combined with operator's controls and
indicators.
10-1
