Condux CableGlider FO Cable Puller - Manual (Page 17)

17
Puller Calibration
When using the electronic control system, the Condux Fiber Optic Cable Puller does not need to be calibrated
on a regular basis; however, the calibration should be checked periodically (at least yearly) to ensure that the
calibration has not changed. If the calibration procedures specified below are not possible at the operator’s
location, we recommend returning the unit to Condux International for calibration by the factory. See section
15 for details on returning the puller to Condux International for calibration.
A. vERIFY THE PULLER’S CALIbRATION SETTINgS
1. Set up the puller as if cable were to be pulled, including installation of the capstan (figure 21).
2. Place a pull line around the capstan. The pull strength of the pull line must exceed the 2,000 pound maxi-
mum capacity of the Fiber Optic Cable Puller.
3. Attach the pull line to a load indicator such as a Dillion dynamometer (section 14).
4. Set the electronic control box tension limit according to the load rating on the capstan.
5. Slowly apply pressure to the puller to tighten the pull line. Continue to pull until the relief valve opens. The
value shown on the dynamometer will be the force at which the pressure relief valve is set for this hydraulic
fluid temperature (see next page).
6. Release pressure to the puller.
7. Set the electronic control box tension limit to the desired tension to be verified.
8. Slowly apply pressure to the puller to tighten the pull line. Continue to pull until the electronic control system
stops the puller and the alarm sounds. The value shown on the dynamometer should match the tension
limit set on the electronic control box.
b. HYDRAULIC PRESSURE RELIEF vALvE CALIbRATION
The hydraulic pressure relief valve on the Fiber Optic Cable Puller is calibrated to the following loads.
• Relief Valve: 1,783 lbs. (7,930 N) line tension on the 12" (305 mm) diameter capstan
700 lbs. (3,113 N) line tension on the 30" (762 mm) diameter capstan
428 lbs. (1,903 N) line tension on the 42" (1,067 mm) diameter capstan
If a different load is required, the relief valve can be adjusted with the following procedure. Do not execute
this procedure to verify the calibration (see previous section).
11.
Dynamometer
Fixture
Capstan
Rope (Spec to exceed
pulling capabilities of cable
puller) wrap 3-4 times
Figure 21. Calibration verification Setup Figure 22. Pressure Relief valve