Page 1
AMD Limit Switch
instrumentación
para fluidos
For 6000 Series
Instructions Manual
TECHNICAL DATA
• Material: Housing. Aluminium alloy
• Ambient temperature: -25 to 80 ºC
• Ingress protection: IP65
• DIN 43650-A connector, PG9 cable gland
• Conforms with the Directives EMC 89/336/CEE and ATEX 94/9/CE
C-MI-60AMD Rev.:0 English Version
Page 2
OPERATION
Flow rate variations displace the float in the metering tube and as it passes by the point where the
60 AMD... limit switch is, by means of magnetic coupling acts on the detectors vane changing its
position from one detection position to the other.
The vane position is maintained until the float passes in the opposite direction at the limit switch
position, changing the inductive detector to its original state.
DIMENSIONS
DN A
15-20 90 mm
20-25 96 mm
40 111 mm
50 117 mm
65-80 130 mm
ELECTRICAL CONNECTION
For the electrical installation it is recommen ded to use multiple co nductor cables with individual
cable sections in the order of 0.25 or 0.5 mm
cables should not be used as they will impair the IP-65 rating of the cable gland.
Before starting the installation, c heck that the cable to be us ed are the right size for the cable
gland on the connector, this will guarantee the instrument will stay water tight.
Peel the outside insulation to free the inn er cables. It is recommended to tin the c ables at the
ends of the wires to avoid loose ends which ca n produce s hort circu its. Pass the c ables th rough
the cable gland and screw in the cables in thei r positions . Once t he wirin g is finishe d make s ure
that the cables are well gripped by the cable gland to maintain the ingress protection degree.
2
2
in order to make it easier to connec t. Individual
Page 3
In the female connector (A):
Terminal 1: Negative (Blue sensor cable)
Terminal 2: Positive (Brown sensor cable)
Terminal 3: NC
Earth terminal: Earth
MOUNTING
Once the electrical connection has been made and the cable gland has been tightened, mount the
female connector (A) on the male base (C), placing the seal (B) between the two pieces.
To fix the level switch in its position on the flow meter, remove the nuts and washers (D), mount
the limit switch in the guide as shown on the previous page, assemble the washers and nuts,
situate the limit switch at the required height and tighten the nuts.
2
1
3
C
B
D
A
MAINTENANCE. Electrical verification of the limit switch
a) Check that the voltage at the terminals 1 and 2 is over 7.5 V when the vane is in the slot. Con-
nect a multimeter with the scale in DC mA, in series with the terminal 2.
b) Verify that the current is less than 1 mA when the vane is in the slot, and m ore than 3 mA when
the vane is out of the slot.
If you don’t have the NAMUR amplifier, the current can be checked using the following circuit diagram:
+
1 kΩ
+
9V Battery
(8.2V Nominal for
NAMUR )
-
2
+
AMD
Multímeter
mA
-
1
-
If you don’t have the detector, the operation of the amplifier can be checked using the following
circuit diagram:
3
Page 4
Multimeter
Amplifier
+
NAMUR
Connection
+
mA
-
Potentiometer 20 kΩ
-
With the potentiometer we modify the current of the NAMUR amplifier. The switching point must be
between 1.2 mA and 2.1 mA. That is, with the current below 1.2 mA the output relay must have a
state and above 2.1 mA the output relay must have the other state.
TECHNICAL CHARACTERISTICS
The AMD is a NAMUR (DIN 19234) sensor with the following nominal characteristics:
Nominal voltage 8.2 V
Power supply internal resistance 1 k
Current with the vane into the slot < 1 mA
Current with the vane out of the slot ≥ 3 mA
Power supply limits 5 ... 25 VDC
Ambient Temperature -25 ... +80 ºC
Self inductance 160 µH
Self capacity 20 nF
Conforms with the Directive EMC 89/336/EEC and ATEX 94/9/CE
WARRANTY
Tecfluid S.A. GUARANTEES ALL ITS PRODUCTS FOR A PERIOD OF 24 MONTHS, after
consignment, against all defects in materials and workmanship.
This warranty does not cover failu res which can be imp uted to mis use, use in an application different
to that specified in the order, the result of service or modification by un-authorized persons, bad
handling or accident.
This warranty is limited to cover the repair or replacement defective parts which have not been
damaged by misuse.
This warranty is limited to the repair of the equipment and all further and eventually following
damages are not covered by this warranty.
Any consignment of equipment to our factory or distributor must be previously authorised. The
consignment should be done with the equipment well packed, clean of any liquids, grease or
hazardous materials. Tecfluid S.A. will not accept any responsibility for damage done during
transport.
Together with the equipmen t, a note should be enclosed indicating the failure observ ed, the name,
address and telephone number of the sender.
Ω
TECFLUID, S.A.
Narcís Monturiol, 33
E-08960 Sant Just Desvern
Tel. + 34 93 3724511 - Fax + 34 93 4734449
E-mail: tecfluid@tecfluid.com
Internet: www.tecfluid.com
The technical data in this document is subject to modification without notification, if the technical innovations in the product or
manufacturing processes so require.
Loading...