APG RPM Explosion Proof Resistive Chain user manual - Manual (Page 12)

RPM Series Rev. D6, 10/09
12
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]
Wiring for Voltage Operation
Red and Black connect to each end of a resistive chain.
The white wire is the voltage output that is connected
to different points on the resistive chain by
reed switches.
Red +5 to +15 VDC
Black Ground
White Voltage Out
• Inspection and Maintenance
Periodic inspection is necessary to keep your RPM unit in good working order.
CAUTION! Do not remove the housing cover until the atmosphere
is determined to be safe, and the power supplied to the unit is
turned off.
Keep the sensor clean.
If sediment or other foreign matter is trapped between the stem and the float,
detection errors may be caused.
Inspect probe shaft and bottom weld for any possible holes or leaks. If possible
leak is detected remove probe from service and send to factory for repair.
Inspect O-ring on cover to make sure that it is in good condition.
Never leave the housing cover off. If the cover becomes damaged or is
misplaced, replace immediately.
White
Black
Red
C S A A p p ro ve d C la ss I D iv is io n 2
O p er at in g T
em
p er at u re :
-1 0° t
V olt
ag e R
eq
u ir em
en
ts : 5 t
o 1 5 V
M od
el N o. R P M _
S er ial N o. R P M -X X X X X
100K Resistor
Terminal Strip