2. Kessler-Ellis Products
  3. SUPERtrol II

Kessler-Ellis Products SUPERtrol II Addendum To Manual

  • Hello! I've reviewed the provided addendum to the SUPERtrol II manual, focusing on the ST2 flowmeter manifold controller. This document outlines how the device manages two flowmeters (high and low range) and a bypass valve to optimize flow measurement across a wide range. It also covers instrument setup and wiring instructions for integrating the controller into your system. I'm ready to answer any questions you have about the device.
  • What is the purpose of the bypass valve?
    How does the device determine which flowmeter to use?
    What type of valve should be used for the bypass control?
Addendum to SUPERtrol II Manual For Manifold Controller
Manifold Controller using the ST2
General Description-
The piping layout for a ow measurement manifold is shown in gure-1. Such owmeter manifolds are used to increase
the ow measurement turn down range beyond that which can be satised by a single owmeter.
The ow measurement manifold consists of:
High ow range owmeter
Low ow range owmeter
Bypass valve
Flow Measurement Instrument/Controller
Interconnecting piping
Ancillary temperature and pressure measurement devices (as needed)
The principle of operation is that the ow is always measured by the larger owmeter. If the larger owmeter indicates a
ow measurement below its measurement range, a bypass valve is closed diverting all the uid ow through the smaller
ow meter where the measurement is made.
In the case where the bypass valve is open, most of the ow is diverted around the smaller owmeter. The portion of the
uid passing through the owmeter may cause the meter to coast, but it will not be overranged.
Operation of the Flow Measurement Instrument/Controller using ST2-
A owmeter manifold controller is a special ow instrument intended to accept inputs from two owmeters, one larger and
one smaller, and which also controls the bypass valve. The instrument setup contains the calibration information for both
owmeters as well as the manifold ow rate switch setpoint and hysteresis.
The instrument operation may be summarized as follows:
1. Measure the ow rate signal from the high range owmeter
2. Decides if the owrate is below the user specied low ow rate for the high range owmeter:
If yes, close the bypass valve
If no, open the bypass valve
3. If the bypass valve is open display owrate and totalization based on the high range owmeter
If the bypass valve is closed, display owrate and total based on the low range owmeter
4. Analog Output, Relays, Pulse Output, etc... is based on which owmeter is active at the time.
This special version of the ST2 has two analog, ow input channels.
Valve Specications-
The valve should be a normally open energize to close valve of the same line size as the larger owmeter.
To be effective as a bypass around the smaller owmeter the valve should present a minimal pressure drop at the maxi-
mum owrate. Full port valves perform best.
User Wiring-
1. Wire the analog input for the high range meter to terminal 2
2. Wire the analog input for the low range owmeter to terminal 3
3. Wire the normally open control valve to Relay 1 terminals NO and COM
99607 03/03/10
Instrument Setup Summary-
The instrument setup is similar to other uses for the SUPERtrol II. The following highlights the basic setup of the instru-
ment when used as a owmeter manifold controller:
1. Setup Flow Input as follows:
a. Set Flowmeter Type to “Linear- Manifold”
MENU LOCATION: FLOW INPUT menu -> FLOWMETER TYPE submenu
b. Enter the input signal type, low scale, full scale and low ow cutoff for the low range owmeter
MENU LOCATION: FLOW INPUT menu -> LOW SCALE submenu
MENU LOCATION: FLOW INPUT menu -> FULL SCALE submenu
MENU LOCATION: FLOW INPUT menu -> LOW FLOW CUTOFF submenu
c. Enter the input signal type, high range low scale and high range full scale for the high range owmeter
MENU LOCATION: FLOW INPUT menu -> LOW SCALE HIGH RANGE submenu
MENU LOCATION: FLOW INPUT menu -> FULL SCALE HIGH RANGE submenu
2. Setup Relay 1 as follows:
Assign Relay 1 Usage to Volume Flow
MENU LOCATION: RELAYS menu -> SELECT RELAY 1 submenu -> RELAY FUNCTION submenu
Assign Relay 1 Mode to Hi Alarm, Follow
MENU LOCATION: RELAYS menu -> SELECT RELAY 1 submenu -> RELAY MODE submenu
Set Limit Setpoint 1 to the desired switch point between the high and the low range owmeters
( Typically 95% of FS on the maximum on the smaller owmeter)
MENU LOCATION: RELAYS menu -> SELECT RELAY 1 submenu -> LIMIT SETPOINT submenu
Set the Pulse Width to 0
MENU LOCATION: RELAYS menu -> SELECT RELAY 1 submenu -> PULSE WIDTH submenu
Set the hysteresis to a owrate approximately 1% of the maximum ow for the high range owmeter
MENU LOCATION: RELAYS menu -> SELECT RELAY 1 submenu -> HYSTERESIS submenu
Pressure TemperatureFM-1
FM-2
Valve
PRINT
5
0–
TIME
CLEAR
•
MENU
ENTER
HELP
TEMP
4
PRE 1
3
RATE
2
TOTAL
1
GRAND
6
SCROLL
7
PRE 2
8
DENS
9
SUPERtrol II
Manifold Controller
KESSLER-ELLIS PRODUCTS 10 Industrial Way East, Eatontown, NJ 07724
800-631-2165 • 732-935-1320 • Fax 732-935-9344 • http://www.kep.com
Figure-1
Wiring Details
High Range
Flow Meter
Low Range
Flow Meter
7
8
•
11
1
2
3
4-20 mA In (Temperature)
(+) 24V Out
4-20 mA In (Pressure)
17
18
19
N.O. (Relay 1)
COM (Relay 1)
N.C. (Relay 1)
Line
Temperature
Transmitter
Static Line
Pressure
Transmitter
Bypass
Valve
(+) 24V Out
4-20 mA In (Hi Range)
4-20 mA In (Lo Range)
Flow Meters
Pressure & Temperature Transmitters
Bypass Control Valve
Bypass valve should fail open on loss
of power or if computations are paused.
!
NOTE
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