Roth AQUASTOP II User manual

Operations manual
AQUASTOP
®
II
Laboratory
cooling water
monitoring unit
Carl Roth GmbH + Co. KG
Schoemperlenstr. 3-5,
D-75185 Karlsruhe
 ++ 9/ 721 5606-0 · ++ 9/ 721 5606-1 9
[email protected]
© 01/2015 All rights reserved

Operations manual AQUASTOP
®
II
2
Dear customer,
thank you for having chosen this AQUASTOP
®
II cooling
water monitor. This high quality device has been produced
in our ISO 9001-certified factory and was shipped to you
after a thourough quality test.
Unpack Check the device for eventual shipping damage.
Don't connect damaged equipment !
Claim the damage with your shipping agent.
Read Please read carefully this operating manual be-
fore bringing the device into service !
onnect Wiring the device should be done by your quali-
fied electrician following the instructions given in
this manual.
Warranty period is 1 year and includes all malfunctions
clearly caused by material, production or design
failures. Repair or replacement in this case are
free of charge, you only pay the shipping cost to
our factory. No further claims or requirements
can be accepted, especially for consequential
losses or damages.
Service We help you quickly and at resonable costs.
Just send us the device with repair order and
precise description of the malfunction.

Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG 3
Carefull packaging is essential for a safe shipment !
Minor repairs are done immediately without formal offer. In
any other case, we contact you as soon as possible to
determine the next steps.
To facilitate your orientation in this manual, you find the
following symbols :
Safety advice
General information
Wiring- and installing advice

Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG
Table of content
hapter Page
1 Features 5
2 Safety advice 6
3 Specification 8
Operating mode description 10
5 Installation and wiring 1
5.1 Installation
5.2 Connecting to the mains
5.3 Wiring of accessories
6 Operation : 17
6.1 Operating elements and keys
6.2 Start-up procedure 19
7 Configuration : 20
7.1 Temperature limit value
7.2 Cooling water flow limit value
7.3 Temperature range 21
7. Cooling water flow range 22
7.5 Calibration of the flow meter
8 Error messages 2
8.1 Temperature sensor breakage
8.2 Flow meter error
9 Serial data interface 25
10 CE-conformity certificate 26

Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG 5
1. Features
Coolig water monitoring unit for use in laboratories,
switches off any electrical load up to 230V AC / 3,5kW in
case of
- Undershooting of the chosen minimum cooling
water flow :
Solenoid valve in the cooling water admission
closes, connected electrical load is disconnec-
ted with all poles
- Overshooting of the chosen maximum tempera-
ture limit value :
Cooling water temperature is measured by
means of a sensor integrated in the flow meter,
alternatively, a separated Pt100 sensor placed
elsewhere in the process can be monitored.
Solenoid valve in the cooling water admission
remains open, connected electrical load is dis-
connected with all poles
- Acoustical pre-warning before the final switching
action
- Freely programmable alarm limit values
- Data interface RS232 for easy registering of all
relevant process data

Operations manual AQUASTOP
®
II
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2 Safety advice
1. Please read this advice carefully.
2. Keep this operations manual for use near the
unit.
3. This is an electral device driven with high
voltage, please respect all relevant safety
regulations.
Mains voltage and every voltage greater than 2
volts is dangerous !
. Connect to a power source following the
identification plate on the device.
5. Avoid contamination of the interior with debris,
liquids or sprays.
Risk of short-circuit, fire or electric shock !
6. Don‘t place the device on hot surfaces or near
radiation sources of hot parts.
7. Keep the power connection cable clear of hot
parts or sharp edges.

Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG 7
8. Disconnect the power cable immediately, if
- it was damaged,
- liquid or parts penetrated the device,
- the device was damaged by falling down or
other mechanical impacts,
- you have the suspicion of any malfunction.
9. The operator must be thoroughly instructed by
a qualified person for the work to be carried out.
10. Intervention at the device must only be carried
out by qualified staff members.
For repair, the device should be send back to
our factory. Attempted self-repair causes
immediate termination of the warranty period !
If spare parts are required, only parts recom-
mended by the supplier must be used. The use
of other parts may cause damage and/or
hazard for operation personnel.
11. Please respect further recommandations and
warnings described in this operations manual.
.

Operations manual AQUASTOP
®
II
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3. Specification
Mains voltage :
230V ± 10%, 8...63Hz
Electrical connection :
Power cord with protective earth
Nominal rating / nominal current :
3,5kW / 15A
Fuses :
16A MT (load)
0,5A MT (solenoid valve)
0,2A MT (controller)
Solenoid valve :
230V, 50Hz, 120mA
ooling water flow range :
2 ... 99l/h
Flow measurement principle :
inductive
Temperature sensor:
NTC (integrated in the flow meter) or external
Pt100 sensor
Temperature range (internal sensor) :
0 ... 80°C
Temperature range (external Pt100 sensor) :
0 ... 250°C

Operations manual AQUASTOP
®
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Carl Roth GmbH + Co. KG 9
Alarm output :
Floating contact, 1x ON, max. 230V/1A
Display :
7 segment LED-display in 2 lines, shows simulta-
neously waterflow and –temperature, can be switched
over to other parameters for control or programming
purpose
Signalisation of operational state and alarms:
2x LED jellow : heating / solenoid valve action
2x LED red : temperature alarm / flow alarm
Acoustical alarm :
Piezo tweeter 90db
Operation :
keys
Insulation voltage :
000 V
Housing:
PVC RAL3000 / RAL9002
Dimensions:
205 x 175 x 78mm (W x D x H)
Weight :
1,3kg

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®
II
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4. Operating mode description
This unit monitors continuously the cooling water
flow and –temperature of any critical laboratory
equipment operating without surveillance and helps
preventing damages caused by unsufficiant cooling
action. It can easily be mounted on already existing
installations.
Cooling water admission is controlled by an solenoid
valve fitted onto a normal water tap. The combined
flow meter / temperature sensor is fitted in the coo-
ling water line downstream of the equipment to be
monitored. In case the critical process temperature
to be monitored must be measured elsewhere in the
installation, an external Pt100 sensor can be con-
nected. This sensor needs then to be placed direct-
ly on the spot to be surveyed. Connection of an
external temperature sensor automatically discon-
nects the integrated temperature sensor in the flow-
meter.
The heating of the installation or equipment, e.g. a
bath or heating plate, can directly be fed from the
socket on the backside of the AQUASTOP® II. This
protects the installation against damages caused by
lack of cooling water, e.g. by a leaky water hose or
tube, and also in case of other unacceptable tempe-
rature increase, inside the cooling water or else-
where in the process.
A floating contact (230V/1A) is available for external
alarms. AQUASTOP® II is further equipped with a
RS232 serial data interface which allows easy docu-
mentation of measured values on a connected PC.

Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG 11
Fig. : Mounting example of the cooling water monitoring unit
AQUASTOP

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®
II
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During normal operation, AQUASTOP® II works in
surveillance mode. The actual temperature of the
cooling water is shown in the upper part of the dis-
play. If an external temperature sensor is used
(which automatically disconnects the internal tem-
perature gauge in the flow sensor), make sure that
this sensor is located at an appropriate position to
measure the critical temperature in the process.
The measured cooling water flow in liter per minute
is shown in the lower part of the display.
If the actual temperature approaches the program-
med limit value (see chapter 7.1), a pre-alarm
sounds if the tolerance (see chapter 7.3) is reached.
The red LED „High temperature“ flashes and an
acoustical alarm sounds at the same time.
If the limit temperature is reached, the heating load
is definitely switched off (yellow LED „Heating“ is
extinguished), the red LED „Temp high“ lights conti-
nuously and the floating contact for external alarm is
activated. The temperature indication on the display
flashes also, the solenoid cooling water valve re-
mains open to ensure the correct cooling of the in-
stallation.

Operations manual AQUASTOP
®
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Carl Roth GmbH + Co. KG 13
The cooling water flow surveillance works in a simi-
lar manner : If the flow approaches the programmed
limit value (see chapter 7.2), a pre-alarm sounds if
the tolerance value (see chapter 7.3) is reached.
The red LED „Flow low“ flashes, an acoustical alarm
sounds at the same time. If the limit flow value is
reached, the heater as well as the solenoid valve
are definitely switched off (yellow LEDs „Heating“
and „Solenoid valve“ are extinguished), the red LED
„Flow low“ lights continuously and the floating con-
tact for external alarm is activated. The flow indica-
tion on the display flashes.
An acknowledgement of the pre-alarms is not ne-
cessary, as soon as the temperature or the water
flow are again outside the programmed tolerance
range, the pre-alarm stops.
On the contrary, the final alarm provokes a definite
switching-off, which can only be recycled by pres-
sing the green „R“-key (6). This key causes a
complete initialisation of the unit, shown by a circ-
ling digit display indication. During 50 sec., all
alarms are inhibited, the heater as well as the sole-
noid valve are switched on again. If the failure is not
corrected (increase water flow or adjust the alarm
values), the alarms are re-engaged and act accor-
dingly.

Operations manual AQUASTOP
®
II
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5. Installation and wiring :
5.1 Installation
The installation site must provide easy access for
the operator without hazard. Sufficient mechanical
stability must be guaranteed, also secure the device
from slipping on the installation surface. To ease
operation and good visibility of the display, the
handle can be used as a support. To adjust the po-
sition of the handle, unfasten the screws on both
sides of the handle and fasten them again after ad-
justment.
5.2 Wiring of power supply
Before wiring the device, make sure that the main
switch is in position OFF „0“. Herewith, all poles are
disconnected from the mains voltage. Before wor-
king on the device itself or on an installation
connected to it, the unit must be prevented
against unintentional restart. This can be done by
retracting the power cable and securing it against
re-connecting.
After having finished the wiring completely, switch
the device on with main switch in position ON „1“.
5.3 Wiring of accessories
Pin assignment of flow
meter with integrated
temperature sensor

Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG 15
Pin assignment of the alarm connector
Pin assignment of the external (alternative)
Pt100 temperature sensor

Operations manual AQUASTOP
®
II
16
9 10 1
2
3
5
6
7
8
Fig. : Back AQUASTOP® II
1 External Pt100 temperature sensor
2 Flowmeter
3 Floating alarm contact max. 230V / 1A
Serial interface RS-232
5 Fuse heating 16A MT
6 Fuse solenoid valve 0,5A MT
7 Fuse controller 0,2A MT
8 Power cord
9 Socket solenoid valve 230V
10 Socket heating 230V, 16A

Operations manual AQUASTOP
®
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Carl Roth GmbH + Co. KG 17
6 Oeration
6.1 Operating elements and keys
1 2 3
Fig. : Front AQUASTOP
7 6 5
1 Multi-function display
2 „UP“-key
3 „Mode“-key
LED signalisation operational state
5 Main switch
6 „Reset“-key
7 „DOWN“-key

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®
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Key operational functions :
Press the UP or DOWN keys (2/7) to increase
or decrease the actual value by 1 digit .
Move up or down quickly by holding the key
pressed.
MODE-key, toggles the display from actual
value to program mode.
Set the duration of the pre-alarm by pressing
both „M“ (3) and „UP“ or „DOWN“-keys (2/7)
simultaneously.
RESET (6) the surveillance algorithm to initial
position. The unit then behaves as after an
complete restart (Power ON).
LED signalisation :
Illuminated when solenoid valve is
engaged.
Illuminated when heating is on.
Flashes if temperature approaches the
programmed limit value, illuminated if
limit value is reached.
Flashes if coolant flow approaches the
programmed limit value, illuminated if
limit value is reached.

Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG 19
6.2 Start-up
Attention :
Before switching the unit on, make sure that all
tubing is tightly secured and the flow meter is
mounted in the right direction of the cooling water
stream (see arrow).
After verification of all electrical connections, switch
the coolant monitor on (5). The green light within the
main power switch is now illuminated.
Open then the water tap and adjust the water flow
to the desired flow value shown on the lower line of
the display (1). During 50 seconds after the initial
start-up (or after having pressed the RESET-key
(6) ), AQUASTOP® II is re-initialized and all alarms
are inhibited. This gives you enough time to fill and
adjust the entire installation.
During this period, a circling digit on the display
shows the initialisation phase. Occasional alarms
are only indicated by flashing of the corresponding
LED ( ), but do not influence the connected heating
and/or solenoid valve.

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®
II
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7 Setting the operational limit values
7.1 Temperature limit value :
To alter the temperature limit value, press once the
„M“-key (3). On the lower line of the display, „te“ is
shown and the temperature limit value shown on the
upper display line can now be altered with the „UP/
DOWN“ keys (2/7). Maintaining the keys pressed
makes increasing or decreasing the value quicker.
The new limit value is automatically accepted after
20 sec. (back to surveillance mode).
Pressing the „M“-key (3) again switches over to the
next menu parameter :
7.2 Flow limit value :
On the upper line of the display, „flo“ is shown and
the flow limit value shown on the lower display line
can now be altered with the „UP/DOWN» keys (2/7).