Varec 2500, Installation And Operation Manual

Page: 67 / 124

Varec, Inc. 57
Chapter 5
Operation
Caution Do not release the checker knob and allow the springs to return the mecha-
nism
. Over time the springs will break and jam the gauge.
Caution Do not turn the operation checker knob on systems that have no float and that
are directly connected to a floating roof.
1. For non-crank gauge heads, use the operation checker knob to check gauge operation.
Turn it clockwise one-quarter turn, while observing the display.
Caution For hand crank gauge heads, do not disengage the crank while the float is above
the surface of the liquid. Do not allow the float to free fall. Damage to the system may
result.
2. For hand crank gauge heads, use the crank to check gauge operation (refer to the initial
operation paragraphs above). If the float is not on the surface of the liquid, slowly rotate
the crank clockwise, while watching the display. When the counters stop, do not continue
to crank.
Note If the tape becomes slack with the float on the surface, the tape may slip off the
elbow pulley, the tape storage sheave, or the tape keeper. If this occurs, refer to
Chapter 9, Troubleshooting on page 99.
3. Turn the crank counter-clockwise to raise the float about 2 inches (51 mm) above the prod-
uct, then lower it back to the surface. The float should not be left on the surface of prod-
ucts that are agitated. Raise it to the tank top in this situation, and latch the ratchet pawl.