EM100/102 LOW FLOW
MAGNETIC FLOW METER
INSTRUCTIONS
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1 9 0 2 6 7 2 N D AV E S O U T H , K E N T, WA 9 8 0 3 2 U S A
( P ) 2 5 3 . 8 7 2 . 0 2 8 4 ( F ) 2 5 3 . 8 7 2 . 0 2 8 5
W W W. S E A M E T R I C S . C O M 1 . 8 0 0 . 9 7 5 . 8 1 5 3
LT-11748-A
Revised 8/03
EM100/102 TROUBLESHOOTING GUIDE
Problem Possible Causes Possible Solutions
Analog output at 0 mA
Analog output is 4 mA
with flow
No pulse output
Flow rate incorrect
No loop power
Unit not grounded
Flow reversed
Reversed output connections
Not grounded
Reversed flow
Missing or incorrect ground wire
Fluid conductivity <20 uS/cm
Empty pipe
4-20 mA loop needs an external
power supply - if missing, add it
Connect to earth ground
Note flow direction arrow, reverse
direction to match
Change output connection
Connect to earth ground
Change flow direction
Check for proper grounding
Select other flow meter
Install meter in vertical position
OPERATION
When the newly-installed meter is first powered up, particularly if it has been dry prior to start up, it can take from
a few seconds to a minute for the signal to stabilize. In normal operation, keeping the meter filled with fluid is
recommended to prevent this delay. An empty pipe detection feature will normally respond to lack of liquid in the
pipe, and will register zero flow, but under certain rare conditions it is possible for this feature to fail to recognize
the empty pipe. See the warning under “Mounting” regarding this possible problem.
The optional 4-20 mA signal outputs 4 mA at zero flow and 20 mA at maximum rated flow. The standard pulse
signal is a 50% duty cycle pulse set at 1000 pulses/liter (3785 pulses/gallon).
