CT12A INSTRUCTION MANUAL
56-101-03100-E CH. 3
May
/ 29 / 09 Page 12 of 19
Due to inherent variations in cable diameter, there can be differences between the actual
cable tension and that displayed by the tensiometer. In order to minimize the effect of ca-
ble variances, it is recommended that multiple measurements be taken on the cable using
the Averaging Mode to ensure the reliability of the measurement.
When the CT12A is powered On, the unit defaults to the Mode in which it was during its
last use. The unit is shipped after being set by the manufacturer to Standard Mode.
The only way to change the operating mode is immediately after powering the unit on so,
every time that the current mode has to be changed, turn off the CT12A, turn it on again
and immediately
hold the MEASURE / HOLD button down. The display window will toggle
slowly between AVE and OFF. Release the MEASURE
/ HOLD button when AVE appears
on the display window to set the CT12A to Averaging Mode. To set the Standard Mode,
release the MEASURE
/ HOLD button when the display window shows OFF.
4. TAKING A TEMPERATURE READING
The ambient temperature reading may be taken when the CT12A is in measurement mode,
either in free position, or placed on the cable in an unlocked position (handle is open), or
even with the handle closed if the measured tension is less than 20 Lbs.
To view the ambient temperature in the display window, activate the Measurement Mode
by pressing the MEASURE
/ HOLD button and moving the lever (it is not necessary to bring
it against the body). To exit from the Measurement Mode, press and hold the BKLITE
/ CA-
BLE SEL until the current cable size and riser are shown.
Note: If unit displays n:C instead of temperature, then the unit is not calibrated and
should be returned to the manufacturer for
calibration.
Celsius and Fahrenheit Conversion
The display window will indicate the ambient temperature in either degrees Celsius or
Fahrenheit. To change from one to the other, turn off the CT12A, turn it on again and im-
mediately hold the BKLITE / CABLE SEL button down. The display will toggle slowly be-
tween C and F. Release the BKLITE
/ CABLE SEL when the desired unit is shown. Re-
press the MEASURE
/ HOLD button for the converted temperature reading.
5. SETTING THE DISPLAY BACKLIGHT
When the CT12A is turned on, the backlight of the display will automatically illuminate. If
this light is not required to make the readings visible, to save battery this light can be turned
off. The BKLITE
/ CABLE SEL button, works as a toggle switch to turn off and on this back-
light, if it is pressed down just for an instant and then released.
If a unit has its backlight on, and no activity is detected on either its buttons or its lever, the
backlight automatically turns off after approximately 20 seconds. Ten minutes later without
activity, the whole unit will turn off.
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