VC-6T User`s Manual (Rev. 050816.1)

VC-6T Manual, Rev. 050816.1
Warner Instruments
Perfusion Valve Control System
Model VC-6T
Warner Instruments
1125 Dixwell Avenue, Hamden, CT 06514
(800) 599-4203 / (203) 776-0664
(203) 776-1278 - fax
VC-6T Manual, Rev. 050816.1
2
Table of Contents
SETUP.......................................................................................................................................................... 4
Components............................................................................................................................................. 4
Assembly.................................................................................................................................................. 4
CONTROL DESCRIPTION...................................................................................................................... 6
Front panel .............................................................................................................................................. 6
Command input toggle ......................................................................................................................... 6
TTL Inputs ............................................................................................................................................ 6
Rear Panel ............................................................................................................................................... 7
To Valves .............................................................................................................................................. 7
Event Out.............................................................................................................................................. 7
Power input module ............................................................................................................................. 7
INSTRUCTIONS FOR USE ...................................................................................................................... 8
Flow Adjustment .................................................................................................................................... 8
APPENDIX.................................................................................................................................................. 9
Maintenance............................................................................................................................................ 9
Cleaning ............................................................................................................................................... 9
Stuck or leaky valves ............................................................................................................................ 9
Warranty ................................................................................................................................................. 9
Specifications......................................................................................................................................... 10
Certifications......................................................................................................................................... 11
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
3
The VC-6T Valve Control System lies at the heart of a multi-valve perfusion
system designed to automate and control the delivery of solutions to Warner
Instruments imaging and recording chambers. In addition, its flexible design
allows the VC-6T to be used in many applications not using Warner equipment.
Features include:
 PTFE valves
 6 channels, individually controlled
 Computer controllable
The complete system includes a valve controller, a valve bracket with PTFE
valves, connecting cable, an MPP-6 manifold, a support stand, syringe holder,
six 60 cc syringes, 25 feet of PTFE tubing, 10 feet of PE-160, 18 blunt-ended 18gauge syringe needles, and 6 stopcocks.
The controller can independently regulate the function of up to six valves.
Individual valves can be controlled via manual switch, an external analog
signal or an external digital (TTL) signal. An event marker pulse, generated
each time a valve is switched on, is provided at the rear of the instrument for
recording into your acquisition system. Valve transitions (opened or closed)
occur at full power to insure rapid response times and are then held in place at
less than half power to prevent heat transfer to solutions.
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
4
SETUP
Components
Before beginning setup, take inventory of the supplied components. You should have a
valve bracket with included PTFE valves, a syringe holder, a support stand, 18 blunt-end
syringe needles, stopcocks (6), PTFE tubing (25 ft), PE-160 tubing (10 ft), an MPP 6-port
manifold, and a VC-6 Valve Controller.
The VC-6T is designed to operate as a stopped-flow device wherein the valve for each
channel is either open (allowing solution to flow) or is closed. In general, the shortest response
time for delivery of the selected solution will be achieved by keeping the tubing length between
the MANIFOLD and sample as short as possible.
Assembly
1. Begin assembly of the VC-6T by first attaching the VALVE BRACKET to the SUPPORT
Place the VALVE BRACKET near the base of the SUPPORT STAND as shown above.
STAND.
2. This is followed by attaching the
SYRINGE HOLDER to the top of the
SUPPORT STAND. Place the SYRINGE
HOLDER near the top of the
SUPPORT STAND as shown above.
3. Remove the plungers from the six
supplied 60 cc syringes and place
the syringes into the SYRINGE
HOLDER. Attach STOPCOCKS to each
syringe.
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
5
4. Cut six (6) pieces of PTFE tubing long enough to run from the stopcocks to the input ports
on the PTFE valves.
5. Attach one (1) blunt-end, 18-gauge
syringe needle to both ends of each
length of PTFE tubing to provide
Luer connection points. Insert a
short section of PE-160 onto the
needle tip to facilitate a tight seal
between the PTFE tubing and the
syringe needle.
6. Using the Luer-ended PTFE tubes
formed in step 5, make a connection
between the stopcock on each
syringe to the associated input port
on each PTFE valve. Proper tubing lengths, Luer connector attachments, and tubing
placements are shown in the montage above.
7. Cut six (6) pieces of PTFE tubing to run from the output ports of the PTFE valve to the
supplied MPP manifold. The required tubing length is left to the discretion of the user but
should be sufficient to allow for a short connection between the manifold and the sample
chamber.
8. Attach the remaining blunt-end syringe needles to one end of each section of PTFE tubing.
9. Prepare the MPP manifold to accept the PTFE tubing
by first sliding a short length of PE-160 tubing over
the input ports on the MPP manifold.
10. Now make a connection between the output port on
each PTFE valve and one input port on the MPP
manifold. Connection should be made using the
PTFE tubing described in step 7. Attach the Luer
fitting to the valve and the open end to the manifold.
11. Run a short length of PE-160 tubing from the output
port on the MPP manifold to the input port of sample
chamber.
NOTE: If desired, you can also run PTFE tubing
between the manifold and your chamber. Prepare the manifold to accept the PTFE tubing
by first sliding a short length of PE-160 tubing over the output port on the MPP manifold.
12. Finally, connect the
VALVE MANIFOLD
to the VC-6 CONTROLLER using the attached cable.
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
6
CONTROL DESCRIPTION
Front panel
The front panel of the VC-6 Valve Controller contains TTL inputs for each valve, an
associated 3-position toggle switch for manually setting the state of each valve and an LED
displaying the active status for each valve. There is also a 3-position toggle switch for selecting
the command input mode and a power switch with power on LED.
Command input toggle
A COMMAND INPUT TOGGLE SWITCH is provided for each of the 6 channels of the VC-6 Controller
to allow selection between internal and external commands.
Placing a COMMAND INPUT TOGGLE SWITCH into the on position drives the associated valve into
its open state. A lit LED indicates the open state of the valve. In a similar manner, placing a
COMMAND INPUT TOGGLE SWITCH into the off position drives the associated valve into its closed
state. An unlit LED indicates the closed state of the valve.
TTL Inputs
TTL inputs (front panel BNC’s) are provided for external control for each valve channel. Use
of these inputs can allow for the simultaneous opening of more than one valve from a digital
source (e.g., a computer).
Placing a COMMAND INPUT TOGGLE SWITCH into the ext position activates the associated TTL
BNC input. A logic level low (0 V) applied to the BNC places the associated valve into the closed
state. Correspondingly, a logic level high (3-5 V) places the associated valve into the open state.
A lit and an unlit LED indicates the open and closed states of the valve, respectively.
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
7
Rear Panel
The rear panel contains the power input module with fuse, an
pin D-connector for the VALVE CONTROL BRACKET.
EVENT MARKER OUTPUT,
and a 15
To Valves
A 15 pin, "D" type female connector is used to connect the cable from the
the
VALVE BRACKET
to
CONTROLLER.
Event Out
The Event Marker output produces a 500 ms logic-level output (+5 V) each time a valve is
turned on. At all other times the Event Marker output is low (0 V).
Power input module
A polarized, 3-conductor, IEC320/CEE-22 connector is used for line (mains) power input
to the instrument. A removable cordset, terminated with a NEMA 5-15P connector, is standard.
A fuse holder contains a protective fuse in series with the high side (brown or black wire) of the
mains. The holder accepts 5 x 20 mm fuses of the type indicated.
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
8
INSTRUCTIONS FOR USE
Flow Adjustment
Flow rates can be adjusted by raising or lowering the reservoir holder, as well as by
adjusting the height of each reservoir within the holder.
The table below lists the approximate flow rates for a reservoir at the specified height with
the supplied PTFE tubing.
Reservoir height
Approximate flow rate
61 cm (24 in.)
14 ml/min
30 cm (12 in.)
9 ml/min
20 cm (8 in.)
5 ml/min
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
9
APPENDIX
Maintenance
Cleaning
Do not use alcohol, aromatic hydrocarbons or chlorinated solvents for cleaning. They
may adversely react with the plastic materials used to manufacture the system. If salt
solution spills on the valve assembly it should be cleaned as soon as possible with a soft
cloth dampened with a mild solution of detergent and water.
NOTE: PTFE Valves must be completely flushed with distilled water after each use.
Permanent damage will result if saline solution is allowed to crystallize inside the valve.
The exterior of the CONTROLLER may be cleaned periodically to remove dust, grease and
other contamination. It is not necessary to clean the inside. Use a soft cloth dampened
with a mild solution of detergent and water. Avoid abrasive cleaners.
Stuck or leaky valves
One possibility for a stuck valve is that the valve assembly was not completely flushed
out at the end of the day. While excessive salt build-up can result in a stuck valve, a more
significant condition is the potential formation of small pits in the valve seals, which will
result in a leaky valve.
A valve bound with salt can be loosened by flushing with warm water to see if the
crystals will dissolve or loosen. ETOH may be used for sticky buildups and dilute acetic
acid may be used to loosen any mineral deposits.
With the valve in the open position inject the selected cleaning solution into the flow
path using a 10 cc syringe. Inject so solution flows from the input to output ports. Repeat
as often as necessary, usually 3-4 washes are sufficient. Use an empty syringe to blow air
through valve to remove any remaining cleaning solution from the valve interior.
If the valve remains stuck, or continues to leak, after repeated attempts of this
cleaning procedure then the valve should be replaced.
Warranty
The VC-6T Valve Control System is warranted to be free from defects in materials and
workmanship for a period of two years from the date of shipment. If a failure occurs within
this period, we will repair or replace the faulty component(s) at our discretion. This warranty
does not cover failure or damage caused by physical abuse or electrical stress (e.g., exceeding
specified input limits).
Shipping charges to the factory are the customer's responsibility. Return shipping of the
repaired unit will be paid by Warner Instruments, Inc.
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
10
Specifications
Valve Bracket
Delrin. Mounts on 3/8” or 1/2” ring stand
Valves
PTFE, 12 VDC /0.25 A to maintain pinch
Connection Cable
2.4 meter (8 ft.) connecting cable terminated with quick disconnects on
valve end and 15 pin male "D" type connector on controller end.
Tubing
PTFE, 1/8 OD x 1/16 ID
Reservoirs
60 cc capacity syringes
Reservoir Holder
Delrin. Holds six syringes with thumb screws for each reservoir.
Valve Controller
Switch Selection
Manual, Off or External
External Input
+5 V TTL-compatible (BNC Connector)
Event Marker
Logic level pulse 500 ms nominal (rear panel BNC connector)
Manifold
2/1, 4/1 or 6/1 nominal dead space
Power
110-130 or 200-250 VAC, single-phase, 50/60 Hz, 20 watt
Operating Temperature
10-40° C (50-104° F)
Dimensions (H x W x D)
89 x 203 x 305 mm (3.5 x 8.0 x 12 in.)
Weight / Shipping Weight
3.7 kg (8 lb.) / 4.6 kg (10 lb.)
Operating conditions
Equipment is intended to be
operated in a controlled
laboratory environment.
Temperature: 0-40 °c
Altitude: sea level to 2000 m
Relative humidity: 0-95%
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
11
Certifications
Declaration of Conformity
CE MARKING (EMC)
Application of Council Directive: 89/336/EEC
Standards To Which Conformity
Is Declared:
EN55022 Class A
EN61000-3-2
EN61000-3-3
EN50082-1:1992
EN61000-4-2
EN61000-4-3
ENV50204
EN610000-4-4
EN610000-4-8
EN610000-4-11
Manufacturer’s Name:
Warner Instruments, LLC
Manufacturer’s Address:
1125 Dixwell Avenue
Hamden, CT 06514
Tel: (203) 776-0664
Equipment Description:
Valve Controller
Equipment Class:
ITE-Class A
Model Numbers:
VC-6 Controller
I the undersigned, hereby declare that the equipment specified
above, conforms to the above Directive(s) and Standard(s).
Place: Hamden, Connecticut USA
Signature:
Full Name: Burton J. Warner
Position: President
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
12
Declaration of Conformity
CE MARKING (LVD)
Application of Council Directive: 73/23/EEC
Standards To Which Conformity Is
Declared:
EN61010-1:1993
Manufacturer’s Name:
Warner Instruments, LLC
Manufacturer’s Address:
1125 Dixwell Avenue
Hamden, CT 06514
Tel: (203) 776-0664
Equipment Description:
Equipment Class:
Valve Controller
Safety requirements for electrical
equipment for measurement and
laboratory use
Class I
Model Numbers:
VC-6 Controller
I the undersigned, hereby declare that the equipment specified
above, conforms to the above Directive(s) and Standard(s).
Place: Hamden, Connecticut USA
Signature:
Full Name: Burton J. Warner
Position: President
Warner Instruments
A Harvard Apparatus Company
VC-6T Manual, Rev. 050816.1
13
Warner Instruments
A Harvard Apparatus Company
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