Seametrics EM 100-102 v.2 - Manual (Page 3)

INSTALLATION, CONNECTIONS, and OPERATION
Mounting. The EM100/102 can be supported by its piping
connections if the piping is rigid and there is no vibration.
Alternatively, the grounding studs can be used for mounting by
inserting them through pre-drilled holes. Note the centerline
distance in the dimensional drawing below.
OPERATION
The newly-installed meter takes from a few seconds to a minute
for the signal to stabilize at startup, especially if it has been dry.
In normal operation, keep the meter filled with fluid to prevent
this delay. An empty pipe detection feature will normally detect
absence of liquid in the pipe and register zero flow when the
meter is mounted properly.
The optional 4-20 mA signal outputs 4 mA at zero flow and
20 mA at maximum rated flow. The 4-20 mA output requires
a seperate 12-24 Vdc power supply. The standard pulse
signal is a 50% duty cycle pulse set at 1000 pulses/liter
(3785 pulses/gallon).
CAUTION: Although this meter has an
empty pipe detection function, under
certain conditions of empty or partially-
full pipe the meter may read
a flow when there is none. If this is a
hazardous condition, mount the meter in such a way as
to ensure the meter will always be full of liquid.
INSTALLATION
Piping. Metallic pipe or tube, or plastic tubing, can be used
with the meter. The meter has male NPT or barb pipe fittings.
For plastic tubing, use female NPT tubing adaptors. In
installations exposed to vibration, it is not recommended to
use the piping as the sole support for the meter, particularly
on the smaller sizes.
A minimum of 1” of straight pipe run is recommended on the
inlet side of the meter. Straight run is not necessary on the
outlet.
CONNECTIONS
Power and signal connections are provided by the single 4- or
6-conductor color-coded cable. See the Connections chart,
back page. In addition, it is necessary for proper operation
to ground the unit to a good quality earth ground. Use the
12 ft. grounding wire supplied with the unit, or if necessary, a
longer wire attached to one or both of the grounding studs. If
metal piping is used, ground connections from the grounding
studs on the bottom of the unit to both inlet and outlet pipes
provide the best results in metering accuracy. See Grounding
diagrams, back page.
L
.60”
#10-24 STUDS (2),
316 SS
STAINLESS
3.75”
2.00”
BARB or MALE NPT
PIPE FITTING,
PVDF PLASTIC
.83”
.62”
5.70”
2.48”
2.000”
6 FT. LONG
CONTROL CABLE,
6 CONDUCTOR
12 FT. LONG
GROUNDING
WIRE WITH LUGS
(SUPPLIED)
2 EACH #10 LOCKWASHERS (316 SS)
& #10-24 HEX NUTS, (316 SS) SUPPLIED
ABS
HOUSING
DIMENSIONS
-025
-038 1/4” Barb, 3/8” NPT
Size Fittings L (Length)
4.90”
4.90”
Table 1: Fittings and Length
3/8” Barb, 3/8” NPT