CT12A INSTRUCTION MANUAL
56-101-03100-E CH. 3
May
/ 29 / 09 Page 11 of 19
CHAPTER 3: OPERATION
The sections that are included in this chapter, are presented in the sequence that would gener-
ally be followed when using the CT12A to take a cable tension measurement. Some sections
are applicable to all CT12A units and situations; others are particular to certain configurations
and conditions, as will be indicated.
1. DETERMINING THE UNIT CONFIGURATION
Before using the CT12A, determine if it is a single-cable or multi-cable unit by checking the
label located on the front face of the body. For single-cable units, the cable size that the
unit is designed to measure is shown (Fig. 5). Multi-cable units have a table printed on the
label that lists the cable sizes and corresponding riser positions (Fig. 6).
Multi-cable units have rotary risers that are shaped like a cross. Single-cable units have
fixed square-like risers that are customized for one specific cable size. Riser numbers are
engraved into all risers and are also noted on the labels.
2. POWERING ON THE UNIT AND INTRODUCTORY DISPLAY
Securely hold the CT12A unit in the palm of your hand. Turn the instrument on by pressing
and holding down the ON
/ OFF button until the display activates.
After power on, the display window will briefly show a software code that is relevant only to
the manufacturer, and then:
y If the CT12A is in Standard Mode, the battery life percentage will be shortly displayed.
y If the CT12A is in Averaging Mode, the battery life percentage will be shown, followed, for
a short period, by the letters AVE.
Note:
The standard and averaging modes will be explained in the next section.
After these brief displays, the current setting for the cable size will be shown. Multi-cable
units will toggle between this diameter and the corresponding riser number. Single-cable
units will only display its assigned cable size. These displays will remain until a measure-
ment (tension or temperature) is started.
3. SELECTION OF THE OPERATING MODE
Both the multi-cable and single-cable units feature two modes of cable tension measure-
ment: Standard Mode and Averaging Mode.
Standard Mode gives individual cable tension
measurements. Averaging Mode automatically averages three measurements, up to a
maximum of 999 lbs. For greater tensions, the standard mode is to be used.
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