CT12A INSTRUCTION MANUAL
56-101-03100-E CH. 3
May
/ 29 / 09 Page 15 of 19
Measurement Procedure:
y Zero the CT12A by pushing the lever against the body, then pulling it up completely. The
CT12A is ready to measure when the LED stops blinking.
y Clamp the CT12A to the cable to be tested, making sure the risers are seated on the ca-
ble, by pushing the lever completely against the body. A blinking LED means that the
CT12A is measuring the cable's tension. Take the value when the LED stops blinking.
Pull lever up completely and wait until the LED stops blinking before starting the next
reading.
y After taking the first tension reading, the displays from the CT12A and the required steps
depend on the mode that is set, as described below.
If the CT12A is set for Standard Mode (as described in Section 3):
A minimum of three consecutive readings must be taken for a single cable tension
measurement. It may be necessary to skip the first reading in order to obtain a proper
zeroing of the load-cell of the CT12A. The display will indicate the tension values as
described before. Obtain the tension value by calculating the average of at least three
readings.
The unit will be ready to start the measurement procedure at a new location of the ca-
ble, or on a new cable, as soon as the lever is opened and the LED stops blinking.
If the CT12A is set for Averaging Mode (as described in Section 3):
The first reading, described before, is the trial reading, ensuring a proper zero of the
CT12A load-cell. A -0- value will show in the display window, indicating that the trial
reading has been completed.
Three consecutive cable tension measurements must be performed after the trial read-
ing and are automatically averaged by the CT12A. The display window will indicate that
the first and second readings were completed by showing -1- and then -2-. After the
third reading, the CT12A will automatically calculate the average of the first, second
and third readings (the trial reading is discarded), and only this average will be dis-
played, prefixed, as a guide to the user, by an A and separated from the value with a
dot. A summary of the display sequence presented at the CT12A window, correspond-
ing to the readings, is as follows:
-0- Trial reading
-1- First reading
-2- Second reading
A.XXX Third reading (displays average of 1st, 2nd and 3rd readings)
Note:
The maximum average tension that can be measured is 999 lbs. For greater
values, the standard mode must be used.
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