Mess-, Regel- und Überwachungsgeräte für Haustechnik, Industrie und Umweltschutz Lindenstraße 20 DE-74363 Güglingen Telefon: +49(0)7135-102-0 Service: +49(0)7135-102-211Telefax: +49(0)7135-102-147E-Mail: info@afriso.de Internet: www.afriso.de

Read instructions before using device!

Observe all safety information!

Keep instructions for future use!

Version: 03.2008 ID No.: 854.001.0392

Operating Instructions

Alarm unit for oil, petrol and grease separators Type: WGA 06

WGA 06 Part No.: 53414 WGA-ÖW probe Part No.: 53417 WGA-AS probe Part No.: 53415

Oil-on-water alarm or overflow alarm

0123

2 WGA 06

Contents

1 This instruction manual ............................................................................................3 1.1 Precautions...................................................................................................3 1.2 Explanation of symbols and typeface...........................................................3

2 Safety.......................................................................................................................4 2.1 Intended use.................................................................................................4 2.2 Predictable incorrect application ..................................................................4 2.3 Safe handling................................................................................................4 2.4 Staff qualification ..........................................................................................4 2.5 Modifications to the product..........................................................................4 2.6 Usage of spare parts and accessories .........................................................5 2.7 Liability information.......................................................................................5

3 Product description ..................................................................................................5 4 Specifications...........................................................................................................7 5 Transportation and storage....................................................................................12 6 Mounting and commissioning ................................................................................12

6.1 Mounting the evaluation unit.......................................................................13 6.2 Mounting the probes...................................................................................13 6.3 Mounting the junction box...........................................................................17

7 Operation ...............................................................................................................17 7.1 Factory settings ..........................................................................................17 7.2 Test.............................................................................................................18 7.3 Altering the factory settings ........................................................................20

8 Maintenance ..........................................................................................................23 9 Troubleshooting .....................................................................................................23 10 Shutting down and disposal...................................................................................25 11 Spare parts and accessories .................................................................................25 12 Warranty ................................................................................................................25 13 Copyright................................................................................................................25 14 Customer satisfaction ............................................................................................25 15 Addresses ..............................................................................................................26 16 Appendix ................................................................................................................26

16.1 Approval documents Auswerteeinheit ........................................................26 16.2 Approval documents probes.......................................................................29 16.3 Declaration of conformity............................................................................31

This instruction manual

WGA 06 3

1 This instruction manual This instruction manual is part of the product. Read this manual before using the product. Keep this manual during the entire service life of the product

and always have it readily available for reference. Always hand this manual over to future owners or users of the

product.

1.1 Precautions

WARNING TERM

Type and source of the danger is shown here.

Precautions to take in order to avoid the danger are shown here.

There are three different levels of warnings:

Warning term Meaning

DANGER Immediately imminent danger! Failure to observe the information will result in death or serious injuries.

WARNING Possibly imminent danger! Failure to observe the information may result in death or serious injuries.

CAUTION Dangerous situation! Failure to observe the information may result in minor or serious injuries as well as damage to property.

1.2 Explanation of symbols and typeface

Symbol Meaning

Prerequisite for an activity

Activity consisting of a single step 1. Activity consisting of several steps

Result of an activity

• Bulleted list

Text Indication on a display

Highlighting Highlighting

Safety

4 WGA 06

2 Safety 2.1 Intended use

The WGA 06 alarm unit consists of an evaluation unit and a capaci-tance probe (WGA-ÖW or WGA-AS). With the probe WGA-ÖW the WGA 06 alarm unit is exclusively suit-able for detection of accumulations of oil in separator sumps or shafts. With the probe WGA-AS the WGA 06 alarm unit is exclusively suit-able for detection of maximum levels in separators or retention tanks. Any use other than the use explicitly permitted in this instruction ma-nual is not permitted.

2.2 Predictable incorrect application The WGA 06 alarm unit must never be used in the following cases: • Using the evaluation unit in hazardous areas (ex)

If the device is operated in hazardous areas, sparks may cause deflagrations, fires or explosions

2.3 Safe handling The WGA 06 alarm unit represents state-of-the-art technology and is made according to the pertinent safety regulations. Each device is subjected to a function and safety test prior to shipping. Operate the WGA 06 alarm unit only when it is in perfect condi-

tion. Always observe the operating instructions, all pertinent lo-cal and national directives and guidelines as well as the appli-cable safety regulations and directives concerning the preven-tion of accidents.

2.4 Staff qualification The product may only be mounted, commissioned, operated, main-tained, shut down and disposed of by qualified, specially trained staff. Electrical work may only be performed by trained electricians quali-fied in accordance with the local and national directives.

2.5 Modifications to the product Changes or modifications made to the product by unauthorised per-sons may lead to malfunctions and are prohibited for safety reasons.

Product description

WGA 06 5

2.6 Usage of spare parts and accessories Usage of unsuitable spare parts and accessories may cause dam-age to the product. Use only genuine spare parts and accessories of the manufac-

turer (refer to chapter 11, page 25).

2.7 Liability information The manufacturer shall not be liable for direct or consequential dam-age resulting from failure to observe the technical instructions, guide-lines and recommendations. The manufacturer and the sales company shall not be liable for costs or damages incurred by the user or by third parties in the usage or application of this device, in particular in case of improper use of the device, misuse or malfunction of the connection, malfunction of the device or of connected devices. The manufacturer or the sales com-pany shall not be liable for damages resulting from any use other than the use explicitly permitted in this instruction manual. The manufacturer shall not be liable for misprints.

3 Product description

Fig. 1: Evaluation unit Fig. 2: WGA-ÖW capacitance probe

Fig. 3: WGA-AS capacitance probe

Included in delivery are as per your order the evaluation unit and one WGA-ÖW or WGA-AS capacitance probe, a junction box and instal-lation material. WGA 06 is a one-channel alarm unit. Typical applications are high level and low level alarms in liquid tanks, condensed water alarms, level control and alarms in oil, sand and grease separators.

Product description

6 WGA 06

Fig. 4: Application examples

WGA-ÖW is a floating probe, which provides an alarm of at least 15 mm thick oil or hydrocarbon layer on water. The most common applications are for example inspection shafts and different kind of basins with altering liquid level. WGA-AS is a level detector for high level, low level and e.g. leak de-tection. Typical applications are oil separators and grease traps where oil/water interface or water/air interface need to be detected. The probes are an apparatus of equipment group II, category 1 G (Directive 94/9/EC). The probes can be installed in zone 0/1/2 haz-ardous area. The evaluation unit must not be installed in hazardous area.

1 LED indicator for mains

2 LED indicators of alarm and fault

3 Test button

4 Reset button for alarm and fault

5 Connector for one WGA level probe [EEx ia]

6 Potential-free relay out-puts for monitoring and control purposes

Fig. 5: Evaluation unit front view

Specifications

WGA 06 7

4 Specifications Evaluation unit

Table 1: Specifications evaluation unit

Parameter Value

General specifications

Dimensions (W x H x D) 175 x 125 x 75 mm

Mounting holes (Ø) 4.5 mm

Material enclosure Polycarbonate

Operational delay relays 5 or 30 s. Relays de-energize at trigger point. Operation mode selectable for increasing or decreasing level.

Ex-classification

Special conditions (X)

II (1) G [EEx ia] IIC VTT 05 ATEX 005X

(Ta = -25 °C to +50 °C)

Electrical parameters Uo = 14.7 V; Io = 55 mA; Po = 297 mW; R = 404 Ohm

Co = 608 nF; Lo = 10 mH; Lo/Ro = 116,5 µH/Ohm

Co = 3.84 nF; Lo = 30 mH; Lo/Ro = 466 µH/Ohm

Characteristic curve of the output volt-age is trapezoidal. Refer to table 2, page 8.

Operating temperature range

Ambient –25 °C to +50 °C

Supply

Supply voltage AC 230 V ± 10 %

The device is not equipped with a mains switch

Power consumption 2 VA

Fuse 125 mA T, 5 x 20 mm (EN 60127-2/3)

Impedance of the current loop between the control unit and a probe

Max. 75 Ohm

Refer to table 3, page 9.

Specifications

8 WGA 06

Parameter Value

Relay outputs Two potential-free relay outputs, 250 V, 5 A, 100 VA

Insulation level, probe/ mains supply voltage

375 V (EN 50020)

Electrical safety

Electrical safety EN 61010-1

Class II

Protection IP 65

Category II/III (EN 61010-1)

Electromagnetic compatibility (EMC)

Noise suppression EN 61000-6-3

Noise immunity EN 61000-6-2 Due to non-linear characteristics of the probe voltage, the interaction of both, capacitance and inductance, must be taken into account. The table below indicates the connecting values in explosion groups IIC and IIB. In explosion group IIA the values of the group IIB can be followed.

Table 2: Connecting values in explosion groups IIC and IIB

Maximum permissible value

Interaction of capacitance and inductance

Ca La Ca La

IIC 608 nF 10 mH 568 nF 458 nF 388 nF 328 nF 258 nF

0,15 mH 0,5 mH 1,0 mH 2,0 mH 5,0 mH

IIB 3,84 µF 30 mH 3,5 µF 3,1 µF 2,4 µF 1,9 µF 1,6 µF

0,15 mH 0,5 mH 1,0 mH 2,0 mH 5,0 mH

Lo/Ro = 116,5 µH/Ohm (IIC) and 466 µH/Ohm (IIB)

Specifications

WGA 06 9

Maximum length of the probe cable is determined by the resistance (max. 75 Ohm) and other electrical parameters (Co, Lo and Lo/Ro) of the probe circuit.

Table 3: Example: Determing the maximum cable length

Parameter Value

Condition Instrument cable with following characteristics is used:

DC resistance of a twin wire at +20 °C is ap-prox. 81 Ohm/km Inductance is approx. 3 µH/m Capacitance is approx. 70 nF/km

Influence of resistance

Estimate for additional resistances in the circuit is 10 Ohm. The maximum length of the cable is then

km/Ohm81Ohm)1075( −

= 800 m.

Influence of inductance

Total inductance is 0,8 km x 3 µH/m = 2,4 mH.

The sum value of the cable and e.g. WGA-AS probe [Li = 30 µH] is 2.43 mH. L/R ratio is

Ohm)1075(mH4,2

− = 37 µH/Ohm

which is less than the maximum allowed value 116,5 µH/Ohm.

Influence of capacitance

Die Kapazität des Kabels beträgt 0,8 km x 70 nF/km = 56 nF.

Die Summe der Werte für das Kabel und z. B. eine Sonde WGA-AS [Ci = 3 nF] beträgt 59 nF.

Cable capacitance is 0,8 km x 70 nF/km = 56 nF.

Combined value of the cable and the e.g. WGA-AS probe [Ci = 3 nF] is 59 nF.

When compared to the values in table 2, we can summarize that above values do not limit the use of this particular 800 m cable in ex-plosion groups IIB or IIC. Feasibility of other cable types and probes for different distances can be calculated accordingly.

Specifications

10 WGA 06

WGA-AS probe (overflow alarm)

Table 4: Specifications WGA-AS probe

Parameter Value

General specifications

Dimensions (L x Ø) 81 x 82 mm

Material enclosure AISI 316, PVC

Operational principle Capacitive

Cable Shielded, oil-proof instrumentation cable 3 x 0.5mm². Standard length is 5 m.

Ex-classification II 1 G EEx ia IIA T5 VTT 05 ATEX 008X

Electrical parameters Ui = 18 V; Ii = 66 mA; Pi = 297 mW; Ci = 3 nF; Li = 30 µH; Un = 9-18 V

Operating temperature range

Ambient –25 °C to +60 °C

Supply

Supply voltage Approx. DC 12 V of the evaluation unit

Electrical safety

Protection IP 68

Electromagnetic compatibility (EMC)

Noise suppression EN 50081-1

Noise immunity EN 61000-6-2 The probe can be installed in zone 0/1/2 hazardous area with the fol-lowing special conditions: • The ambient temperature is between –25°C and +60°C • The probe cable can be extended with the AFRISO junction box

type LJB3-78-83 or LJB2-78-83. The junction box is of light metal so there may be sparks if the box is subjected to friction or impact. The box shall be grounded.

Specifications

WGA 06 11

WGA-ÖW probe (oil-on-water alarm)

Fig. 6: Dimensions

Table 5: Specifications WGA-ÖW probe

Parameter Value

General specifications

Material enclosure AISI 316, PVC

Cable Shielded, oil-proof instrumentation cable 3 x 0.5 mm². Standard length is 5 m. Can also be delivered according to the order with a maximum 15 m long cable. The cable can be extended with a similar instrumentation cable. The maximum pair resistance of the cable should not exceed 75 Ohm.

Operational principle Capacitive

Ex-classification II 1 G EEx ia IIA T5 VTT 05 ATEX 008X

Electrical parameters Ui = 18 V; Ii = 66 mA; Pi = 297 mW; Ci = 3 nF; Li = 30 µH; Un = 9-18 V

Operating temperature range

Ambient –25 °C to +60 °C

Electrical safety

Protection IP 68

Electromagnetic compatibility (EMC)

Noise suppression EN 50081-1

Transportation and storage

12 WGA 06

Parameter Value

Noise immunity EN 61000-6-2 The probe can be installed in zone 0/1/2 hazardous area with the fol-lowing special conditions: • The ambient temperature is between –25 °C and +60 °C • The probe cable can be extended with the junction box type

LJB3-78-83 or LJB2-78-83.The junction box is of light metal so there may be sparks if the box is subjected to friction or impact. The box shall be grounded.

5 Transportation and storage

CAUTION

Damage to the device due to improper transportation.

Do not throw or drop the device.

CAUTION

Damage to the device due to improper storage.

Protect the device against shock when storing it.

Store device in a clean and dry environment.

6 Mounting and commissioning The evaluation unit must not be installed in hazardous area.

Probes connected to the evaluation unit may be installed in ex-plosive atmosphere zone 0,1 or 2.

In case of installations in explosive atmospheres the national requirements and relevant standards as EN 50039 and EN 60079-14 must be taken into account.

If electrostatic discharges can cause hazards in the operating envi-ronment, the device must be connected into equipotential ground ac-cording to requirements with regards to explosive atmospheres. Equipotential grounding is made by connecting all conductive parts into same potential e.g. at the cable junction box. Equipotential ground must be earthed. The device does not include a mains switch. A two pole mains switch (AC 250 V, 1 A), which isolates both lines (L1, N) must be installed in the main power supply lines in the vicinity of the unit. This switch

Mounting and commissioning

WGA 06 13

facilitates maintenance and service operations and it has to be marked to identify the unit. When executing service, inspection and repair in explosive at-

mosphere, the rules in standards EN 60079-1 and EN 60079-19 about instructions of Ex-devices must be obeyed.

6.1 Mounting the evaluation unit Mount the evaluation unit to the wall. The mounting holes are

located in the base plate of the enclosure, beneath the mounting holes of the front cover.

The connectors of the external conductors are isolated by separating plates. The plates must not be removed. Install the plate covering the connectors back after executing

cable connections. The cover of the enclosure must be tight-ened so, that the edges touch the base frame. Only then do the push buttons function properly and the enclosure is tight.

6.2 Mounting the probes

Probe WGA-AS (overflow alarm)

In case of installations in explosive atmospheres the national requirements and relevant standards EN 50039 and EN 60079-14 must be taken into account.

The probe shall not be installed into a space where caustic va-pour, gas or liquid, such as aromatic and chlorinated hydrocar-bons or strong alkalis or acids, can damage the equipment.

WGA-AS is equipped with a shielded 3-wire cable. The wires 1 and 2 shall be connected to the corresponding connectors (1 = +, 2 = –) in the evaluation unit. Wire 3 shall be connected to equipotential ground together with the shield of the cable. Install the WGA-AS probe according to fig. 7, page 14.

WGA-AS causes an alarm, when the probe is immersed ¼ to ¾ in oil or when the probe is 5 to 10 mm in water. The trigger level can be adjusted by SENSITIVITY within the evaluation unit (refer to chap-ter 7.3, page 20). The probe can be mounted loose-hanging at the cabel from the top side of the oil separator. For the proper installation hight also refer to the operations in-

structions of the separator.

Mounting and commissioning

14 WGA 06

Fig. 7: Connection for WGA-AS probe

1 Cover plate

2 Safe area

3 Hazardous area

4 Supply voltage, L1 = phase conductor, N = neutral conductor

5 Mains switch

6 Fuse

Mounting and commissioning

WGA 06 15

7 Relay 1 (alarm relay)

3 = common pole 4 = opening pole when alarm 5 = closing pole when alarm

8 Relay 2 (operating relay)

6 = common pole 7 = opening pole when alarm 8 = closing pole when alarm

9 Channel 1

9 = auxiliary connection (SHD) 10 = [+] supply pole to probe 11 = [-] supply pole to probe

10 4 separating plates of the connectors

11 Shield of the probe cable

12 Channel 1

13 Junction box LJB2-78-83

14 Pair shield

15 To equipotential ground Relays are in alarm position, when the mains voltage ist off. Connect all shields and excess wires to the same point.

Mounting and commissioning

16 WGA 06

Probe WGA-ÖW (oil-on-water-alarm)

The probe shall not be installed into a space where caustic va-pour, gas or liquid, such as aromatic and chlorinated hydrocar-bons or strong alkalis or acids, can damage the equipment.

Install the WGA-ÖW probe according to fig. 8.

Fig. 8: Connection for WGA-ÖW probe

a Evaluation unit d Equipotential ground

b Junction box e Extension cable shield

c Probe cable shield Relays are in alarm position, when the mains voltage ist off. Connect all shields and excess wires to the same point. WGA-ÖW is equipped with a shielded 3-wire cable. The wires 1

and 2 shall be connected to the corresponding connectors (1 = +, 2 = -) in the control unit.

Wire 3 shall be connected to equipotential ground together with the shield of the cable.

Ground connector of the float frame shall be connected to equi-potential ground.

The cable can be shortened or, when the evaluation unit is located further away from the probe, the cable can be extended with the junction box, which is included in the delivery. The probe floats freely on the liquid. Therefore, please use long enough a cable to avoid hanging in the air in critical situations (e.g. when the liquid level decreases). When installing WGA-ÖW probe into an explosion hazardous

zone (0/1/2), the following standards need to be followed: EN 50039 and EN 60079-14.

Operation

WGA 06 17

6.3 Mounting the junction box If the probe cable must be extended or there is need for equipotential grounding, it can be done with the cable junction box. The cabling between the WGA 06 control unit and the junction box should be done with a shielded twisted pair instrument cable. In fig. 7, page 14, the shields and excess wires have been connected to the same point in galvanic contact with metallic frame of the junc-tion box. This point can be connected to equipotential ground thru the ground terminal. Other components of the system that need to be grounded can also be connected to the same ground terminal. LJB2 junction box enables cable extension in potentially explosive atmospheres. The wire used for equipotential grounding must be min. 2.5 mm² me-chanically protected or, when not protected, the minimum cross sec-tion is 4 mm². Make sure, that the cable between the evaluation unit and the

probe does not exceed maximum connection values (refer to chapter 4, page 7).

Junction box of type LJB2 include light alloy parts. When installing in explosive atmosphere, make sure, that the junction box is located so, that it can not be mechanically damaged or it will not be exposed to external impacts, friction etc. causing ignition of sparks. Make sure, that the junction box is closed properly.

7 Operation 7.1 Factory settings

Normal mode – no alarms • Mains LED indicator is on. • Other LED indicators are off. • Relays 1 and 2 are energized.

Oil-on-water alarm/overflow alarm • Mains LED indicator is on. • Alarm LED indicator is on. • Buzzer on after 5 s delay. • Relays de-energize after 5 s delay.

Operation

18 WGA 06

Fault alarm Probe cable break, short circuit or a broken probe. Too low or too high probe signal current. • Mains LED indicator is on. • Probe cable Fault LED indicator is on after 5 s delay. • The relays de-energize after 5 s delay. • Buzzer is on after 5 s delay.

Resetting of an alarm Pressing the Reset push button.

Buzzer will go off.

Relay 1 energizes.

Relay 2 will stay de-energized until the actual alarm or fault is off.

7.2 Test If the operation is not as described here, check the factory set-

tings (refer to chapter 7.3, page 19) or contact the manufacturer. Before pressing the Test button, make sure that the change of

relay status does not cause hazards elsewhere.

Simulating an oil-on-water alarm (WGA-ÖW probe) Lift up the WGA-ÖW probe totally in the air.

An alarm occurs.

Simulating an overflow alarm (WGA-AS probe) Lift and immerse the WGA-AS probe few times into the liquid.

An alarm occurs.

Testing at normal mode 1. Press and hold the Test push button.

Alarm and Fault LED indicators are immediately on.

Buzzer is immediately on.

Relays de-energize after 2 sec of continuous pressing. 2. Release the Test push button.

LED indicators and buzzer go immediately off.

Relays energize immediately.

Operation

WGA 06 19

Testing during a oil-on-wat alarm or overflow alarm 1. Press and hold the Test push button.

Fault LED indicator is immediately on.

Alarm LED indicator of the channel which activated the alarm remains on. The corresponding relay will remain de-energized.

Alarm LED of the other channel is on and the relay will de-energize.

Buzzer remains on. If it has been reset earlier, it will return to be on.

If relay 1 was already reset, it will de-energize again after 2 s.

Test will not affect relay 2, because it is already in alarm status. 2. Release the Test push button.

The device returns without delay to the preceding status.

Testing during a fault alarm Press the Test push button.

The device does not react to the test at all.

Operation

20 WGA 06

7.3 Altering the factory settings If the factory settings described in chapter 7.1, page 17, differ

from the specifications, check if the settings match with the specifications in fig. 9. If necessary the factory settings can be altered.

The following settings can be altered. • Operating direction: High level or low level function (increasing

or decreasing level). • Operation delay: 5 or 30 seconds • Trigger level: Trigger point of an alarm in the probe’s sensing

element.

Fig. 9: Altering the factory settings

3 Serial number

4 Probe selection (channel 1)

1 The settings of channel 1 are made with switches S1 and S2 and potentiometer in the left 5 WGA-AS/WGA-ÖW probe

2 Type plate In fig. 9, the switches are as set in the factory. The following tasks must only be executed by a person with proper education and knowledge of Ex-i devices. We recommend, that when altering the settings the mains voltage is off or the device is initialized before the installation is executed.

Operation

WGA 06 21

Operating directions (MODE) Switch S1 is used to set the operating direction. When the switch is in its low position, Alarm LED indicator as well as buzzer is on and relays de-energize when the liquid level is beneath the trigger level of the probe (low level mode, probe WGA-AS).This setting is also used, when an alarm of an oil-layer on water is required. When the switch is in its high position the Alarm LED indicator as well as buzzer will be on and relays de-energize when the liquid level is above the probe’s trigger level (high level mode, probe WGA-AS).

1 Alarm when level below trigger level

2 Alarm when level above trigger level

3 Trigger level

Fig. 10: Operating directions

Setting the operational delay (DELAY) Switch S2 is used to set the operational delay of the device. When the switch is in low position relays operate and buzzer is on after 5 seconds after the level reaches trigger level, if the level still re-mains on the same side of the trigger level.When the switch is in high position, the delay is 30 seconds. Delays are operational in both directions (energizing, de-energizing).

1 Verzögerung 5 Sekunden

2 Verzögerung 30 Sekunden

Fig. 11: Funktionsverzögerung einstellen

Alarm LED follows the probe current value and trigger level without delay. Fault LED has a fixed delay of 5 seconds.

Operation

22 WGA 06

Setting the trigger level (SENSITIVITY)

1 WGA-AS/WGA-ÖW capacitance probe

2 When rotating the trimmer clockwise the trigger level moves upwards

3 When rotating the

trimmer anti-clockwise the trigger level moves downwards

Fig. 12: Setting the trigger level

Adjusting the switching point for WGA-AS probe: 1. Immerse the probe into the liquid on the designated hight. 2. Rotate the potentiometer until the alarm LED will go on and the

relay de-energizes. Consider the delay. 3. Check the function by lifting and immersing the probe few times

into the liquid. Adjusting the switching point for WGA-ÖW probe: 1. Let the probe float freely on the water. 2. Lift up the probe as much as there is assumed to be oil or hy-

drocarbon layered on the water in alarm situation (the layer that should generate an alarm).

3. If the evaluation unit does not operate, adjust the SENSE trim-mer slowly until the desired switching point is reached.

The sensitivity can also be decreased by adjusting the position of the sensor lower in the floating construction. Too sensitive settings cause unnecessary alarms if there are waves in the liquid.

Maintenance

WGA 06 23

8 Maintenance Table 6: Maintenance times

When Activity

Min. alle 6 Monate und nach jeder Entleerung des Abscheiders

Funktionstest durchführen, siehe Kapitel 7.1, Seite 17.

Sonden reinigen.

Nach jedem Schichtdi-ckenalarm

Sonden reinigen.

Die Netzsicherung kann durch eine andere EN 60127-2/3-konforme Glasrohrsicherung mit 5 × 20 mm/125 mA T ausgetauscht werden. Zum Reinigen der Sonden kann eine milde Reinigungslösung (z. B. Spülmittel) und eine Bürste verwendet werden. Alle sonstigen Reparatur- und Wartungsarbeiten am Gerät dürfen ausschließlich von einer im Umgang mit Ex-i-Geräten geschulten und vom Hersteller autorisierten Person durchgeführt werden.

9 Troubleshooting Repair work may only be performed by qualified, specially trained staff.

Table 7: Troubleshooting

Problem Possible reason Repair

Supply voltage too low.

Fuse is blown.

Mains LED indicator is off.

Transformer or mains LED indica-tor is faulty.

Check if the two pole mains switch is off.

Check the fuse.

Measure the voltage between poles N and L1. It should be AC 230 V + 10 %.

Current in probe circuit too low (ca-ble break) or too high (cable in short circuit).

Fault LED indicator is on.

Probe is broken.

Make sure, that the probe cable has been connected correctly to the evaluation unit.

Measure the voltage separately between the poles 10 and 11. The voltages should be between 10,5 and 12 V (WGA-ÖW probe).

If the voltages are correct, measure the probe current. See below.

Troubleshooting

24 WGA 06

Problem Possible reason Repair

Other mal-functions.

– Send the device to the manufacturer.

Measuring the probe current 1. Disconnect probe’s [+] wire from probe connector (pole 10). 2. Measure short circuit current between [+] and [-] poles. 3. Connect mA-meter as in fig 13, page 24.

If the probe is located in an explosive atmosphere, the multime-ter must be Exi-approved.

4. Make a comparison to the values in table 8, page 24. 5. Connect the wire back to the connector.

a WGA 06-Sonden-anschluss

b Zur Sonde

Fig. 13: Measuring the probe current

Table 8: Probe current

WGA-AS, Pole 10 [+] and 11 [-]

WGA-ÖW, Pole 10 [+] and 11 [-]

Short circuit 20-24 mA 20-24 mA

Probe in air 5-7 mA 5-6 mA

Probe in oil 9-12 mA 9-11 mA

Probe in water 12-16 mA 12-16 mA

Shutting down and disposal

WGA 06 25

10 Shutting down and disposal 1. Switch off mains voltage. 2. Dismount the device (see chapter 6, page 12, reverse sequence

of steps). 3. To protect the environment, this device must not be disposed of

together with the normal household waste. Dispose of the de-vice according to the local conditions and directives.

This device consists of materials that can be reused by recycling firms. The electronic inserts can be easily separated and the device consists of recyclable materials. If you do not have the opportunity to dispose of the used device in accordance with environmental regulations, please contact us for possibilities to dispose of it or to return it.

11 Spare parts and accessories Part Part No.

Event reporting system Phone Alarm SD1 90003

Event reporting system GSM Alarm 90002

Event reporting system EMS 220 90220

Event reporting system EMS 442 90442

12 Warranty The warranty of the manufacturer for this product is 24 months after the date of purchase. This warranty shall be good in all countries in which this device is sold by the manufacturer or its authorised deal-ers.

13 Copyright The manufacturer retains the copyright to this manual. This manual may only be reprinted, translated, copied in part or in whole with the prior written consent of the manufacturer. We reserve the right to technical modifications with reference to the specifications and illus-trations in this manual.

14 Customer satisfaction Customer satisfaction is our prime objective. Please get in touch with us if you have any questions, suggestions or problems concerning your product.

Addresses

26 WGA 06

15 Addresses The addresses of our worldwide representations and offices can be found on the Internet at www.afriso.de.

16 Appendix 16.1 Approval documents Auswerteeinheit

Appendix

WGA 06 27

Appendix

28 WGA 06

Appendix

WGA 06 29

16.2 Approval documents probes

Appendix

30 WGA 06

Appendix

WGA 06 31

16.3 Declaration of conformity