Specifications

36
Series ET
Feed Control with Water Meter Input
The Series ET was designed to feed chemical in response to a water meter
input. Typical applications include inhibitor feed for an open air-cooling
tower. The Series ET provides everything you need in one unique, com-
pact package to create a simple and cost effective metering system.
Principal of Operation
The Series ET counts pulses from a water meter. When the count exceeds
a set value (either 1 or 10), the pump starts. The pump will continue to run
for an adjustable time period. There are two time ranges – either 2 to 200
seconds or 12 seconds to 20 minutes. The setting is made by selecting a
time base value (200 seconds or 20 minutes) and then setting the time
base percentage from 1 to 100%.
Other control features include a standby mode, continuous ‘ON’ mode and
the ability to adjust the stroke length from 0 – 100%.
The pump includes both input and output water meter connections at the
front panel. The output connection provides an isolated dry contact output
of the water meter contact to operate additional pumps or timers off the
same water meter.
Features
 Isolated from Earth Ground
 120VAC or 250VAC @ 50/60 HZ, 5A max
 Isolated Dry Contact (Water Meter)
 Isolated Dry Contact (Water Meter)
 Mode Select Knob, Stroke Length, Stroke Rate
 Standby, On, 200 sec/count, 200 sec/10 count, 20 min/count and 20 min/10 count
 Stroke rate and stroke length adjust 0-100% in 1% increments. Frequency turn-
down ratio 100:1.
 Agency approved for demanding OUTDOOR and indoor applications
Pressure and Flow Rate Capacity
LTB2 LTA2 LTB3 LTA3 LTF4 LTD4 LTB4 LTH4 LTG4 LTE4 LTH5 LTH6 LTH7 LTH8
Capacity GPH 0.21 0.25 0.50 0.50 0.85 0.90 1.00 1.70 1.75 1.85 3.15 5.00 10.00 21
nominalGPD5 6 121220222441424476120240504
(max.) LPH 0.8 0.9 1.9 1.9 3.2 3.4
3.8 6.4 6.6 7.0 11.9 18.9 37.9 79.5
Pressure PSIG 250 150 150 100 250 150 100 250 150 100 150 100 35 20
(max.) BAR 17 10 10 7 17 10 7 17 10
7 10 7 2.4 1.3
MODEL
Electronic Metering Pumps with
Integrated Controller
CM
CM
CM
CM
Engineering Data
Reproducibility:
+/- 2% at maximum capacity
Controls:
Standby On
200 sec/count 200 sec/10 count
20 min/count 20 min/10 count
Stroke Frequency Turn-Down Ratio:
100:1
Stroke Length Turn-Down Ratio:
100:1
Power Input:
120 VAC/50-60 HZ/1 ph
250 VAC/50-60 HZ/1 ph
5 Amp max
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