Setup; Level Sensor Calibration - Graco PR70 Instructions Manual

Setup

Level Sensor Calibration

Polyethylene Tanks
Teach
Element
2002
1. Empty tanks by executing multiple shots.
2. Relieve pressure. See Pressure Relief Procedure,
page 16.
3. With the level sensor installed, locate the teach ele-
ment. It will be marked with a "bulls-eye."
4. Activate the teach element by holding a screw-driver
near the bulls-eye until the green LED begins flash-
ing but for no more than five seconds.
5. After a short time, the green LED will stay lit continu-
ously. This signals that the sensor is now in stan-
dard operating mode.
6. Using appropriate protective wear, check the sensor
for proper operation by reaching inside the tank and
placing hand in the area of the sensor. A green and
yellow LED with a hand next to the sensor indicates
proper functioning.
312394C
Polyethylene Tank Sensor Diagnostics
State
2001
Green
2003
ti12493a
Yellow
Red
Red and
Yellow
Together
A solid red state does not indicate malfunction of
the unit. It indicates that material level is a little
above or below the sensor.
Action
On
Flashes slow
(once per second)
Flashes fast (twice
per second)
Off
On
Off
On
Flashes very fast
(eight times per
second)
Flashing fast
(twice per second)
Setup
Description
Unit is ready for opera-
tion
Sensor is self-adjust-
ing to empty state
Sensor is self-adjust-
ing to full state
Locking mode
Sensor sees material
Sensor does not see
material
Material level is a little
above or below the
sensor
Adjustment error or
internal fault
Short circuit in the
switching output
17