Graco G3000HR 用户手册
Installation
6
308778L
Grounding
1.
Ground the flow meter by connecting a grounded
cable to the sensor.
cable to the sensor.
Have a qualified electrician check the electrical
grounding continuity between the flow meter sensor
and a true earth ground; remove the cable connec-
tor from the sensor and measure the resistance
from the cable connector Pin B to true earth ground.
Refer to F
grounding continuity between the flow meter sensor
and a true earth ground; remove the cable connec-
tor from the sensor and measure the resistance
from the cable connector Pin B to true earth ground.
Refer to F
If the resistance is greater than 25 ohms, check the
cable ground connection. Refer to F
cable ground connection. Refer to F
. 2. Reconnect
the ground sheath or replace the cable. Do not oper-
ate the system until the problem is corrected.
ate the system until the problem is corrected.
2.
Always ground the fluid supply unit, using one of the
following options:
following options:
a.
Mount the meter to a grounded conductive sur-
face, or
b.
Connect the conductive fluid hose to the meter
inlet and outlet, or
c.
Connect a ground wire to the meter's M6
mounting holes.
3.
Never use the flow meter with an electrostatic gun
isolation stand.
isolation stand.
F
IG
. 2
7379A
A
B
C
A
+10-30 Vdc Supply (red)
B
Ground (black)
C
Signal Out (white)