Dinel GRLM-70 Manuale utente

Read carefully the instructions published in this manual before the rst use of the level meter. Keep the manual

at a safe place. The manufacturer reserves the right to implement changes without prior notice.



GRLM–70



1 . Basic description ..................................................................................................................... 4

2 . Range of application ................................................................................................................ 4

3 . Variants of sensors .................................................................................................................. 5

4 . Dimensional drawings ............................................................................................................. 6

5 . Installation and putting into operation ...................................................................................... 8

6 . Mechanical mounting ................................................................................................................ 9

7 . The installation of the custom measuring electrode,exchange or shortening of the electrode ...19

8 . Electrical connection ............................................................................................................... 23

9. GRLM-70 connection examples ............................................................................................. 25

9.1. Connection diagram of the level meter with current output to the UHC-01 converter . 25

9.2. Connection diagram of the level meter with the Modbus output to the URC-485 unit . 27

9.3. Connection diagram of the level meter with the current output to the PCU unit .......... 28

9.4. Connection diagram of the level meter with the current output to the PDU unit .......... 29

9.5. Connection diagram of the level meter with the current output to the MGU unit ......... 29

9.6. Connection diagram of the level meter with the MODBUS output

to the MGU unit using RS485 / MODBUS ........................................................................... 29

10 . Setting elements ..................................................................................................................... 31

11 . Settings .................................................................................................................................. 32

11.1. Initial setting procedure during commissioning .......................................................... 32

11.2. Basic settings ............................................................................................................ 33

11.3. Service settings ......................................................................................................... 36

11.4. Additional functions ................................................................................................... 39

12 . HART®protocol ...................................................................................................................... 42

12.1. Parametrization of GRLM-70 using the Hart® protocol with PCU-100-H ................... 43

12.2. Parametrization of GRLM-70 using the Hart®protocol

with the UHC-01 communicator........................................................................................... 43

13 . Protocol Modbus® ................................................................................................................... 44

14 . Function and status indication ............................................................................................... 44

15 . Order code ............................................................................................................................. 45

16 . Accessories ............................................................................................................................ 46

17 . Safety, protection, compatibility and explosion proof ............................................................. 46

18 . Use, manipulation and maintenance ...................................................................................... 47

19 . General conditions and warranty ........................................................................................... 47

20 . Marking of labels .................................................................................................................... 48

21 . Technical specications .......................................................................................................... 50

22. Packing, shipping and storage ............................................................................................... 58

23 . Menu structure ........................................................................................................................ 59



GRLM–70 © Dinel, s.r.o.

The GRLM®radar level meters are compact measuring devices consisting of three main parts

- measuring electrodes, housing with the computing electronics (head) and a display module

(screen). The electronic transmits very short electrical pulses (0.5 ns), which is connected with a

one-wire transmission line (measuring electrode). Measuring electrode can be formed from rod or

rope. The pulse propagates along the electrode in the form of electromagnetic wave toward the

level part of electromagnetic wave, where it is partly reected and the reected returned to the

receiving module of the electronic. The electronic measures the time of ight of electromagnetic

wave and the current (actual) distance to the level is calculated. Then based on the height of the

level, the level meter current output 4 ... 20 mA is set with the HART communications or an industrial

RS-485 line with Modbus RTU communications and the measured value is shown on the display.

Radar level meters with guided wave are suited to continuous level measurement of various

liquid, mush and bulk-solid materials. Level meters are resistant against changes in the atmos-

phere (pressure, temperature, dust, steam) and to changes in medium parameters (change in

dielectric constant, conductivity).

 

To ensure maximum safety of control processes, we have dened the following safety instructions

and information. Each instruction is labelled with the appropriate pictogram.



This symbol informs you about particularly important instructions for installation and operation of

equipment or dangerous situations that may occur during the installation and operation. Not observing

these instructions may cause disturbance, damage or destruction of equipment or may cause injury.



This symbol indicates particularly important characteristics of the device.



This symbol indicates helpful additional information.





 

Alloperationsdescribedinthis instruction manual have to be carried out by trained personnel

or by an accredited person only. Warranty and post warranty service must be exclusively

carried out by the manufacturer.

Improper use, installation or set-up of the sensor can lead to crashes in the application.

The manufacturer is not responsible for improper use, loss of work caused by either direct

or indirect damage, and for expenses incurred at the time of installation or during the period

of use of the level sensors.

• GRLM–70_–00 Without electrode, the electrode is made by customer (only variant 10

or 30) and connected to the electrode junction by M8 thread.

• GRLM–70_–10 Uncoated stainless steel rod electrode, for level measurement liquids

and bulk solid materials (water solutions, emulsion, oils, diesel, our, sand,

granulates, etc.). Electrode length 0,5 ... 8 m.

• GRLM–70_–11 Fully coated stainless steel rod electrode (PFA), for level measurement

of aggressive liquids and very pure liquids. Electrode length 0,5 ... 2 m.

• GRLM–70_–12 Fully coated stainless steel rod electrode (FEP), for level measurement

of aggressive liquids and drinks. Electrode length 0,5 ... 2 m.

• GRLM–70_–13 Semi-coated stainless steel rod electrode (FEP), for level measure-

ment of liquids in area,where it could condense steam on the electrode.

Electrode length 0,5 ... 8 m.

• GRLM–70_–20 Uncoated stainless steel rod electrode with reference tube (coaxial),

for accurate level measurement of liquids in cramped spaces. Electrode

length 0,5 ... 3 m.

• GRLM–70_–30 Uncoated stainless steel rope electrode and weight, for level

measurement of liquids and bulk solid materials (water, grains, sand, our,

cement, etc.) in higher silos, vessels, reservoirs. Electrode length 1 ... 40 m.

• GRLM–70_–32 Fully coated stainless steel rope electrode (FEP) and coated weight

(PTFE), for level measurement of aggressive liquids and very pure liquids.

Electrode length 1 ... 12 m.

• GRLM–70_–33 Uncoated stainless steel rope electrode with anchorage, for level

measurement of bulk solid materials (grains, our, cement, etc.) It is

recommended to anchor in storage tanks and silos for bulk solid materials

up to a depth of 10 meters. . Electrode length 1 ... 40 m.

• GRLM–70_–34 Coated stainless steel rope electrode (Polyamide) and uncoated

weight, for level measurement of liquids and adhesive bulk solids (our,

cement, etc.). Electrode length 1 ... 40 m.

• GRLM–70_–35 Coated stainless steel rope electrode (Polyamide) with uncoated

anchorage, for level measurement of adhesive bulk solids (our, cement,

etc.). It is recommended to anchor in storage tanks and silos for bulk solid

materials up to a depth of 10 meters. Electrode length 1 ... 40 m.

• GRLM–70_–36 Uncoated rope electrode without weight, for level measurement of

unsticky bulk solids (grains, sand, etc.) Anchoring with rope clamps and

eye ring. Recommended anchoring in storage tanks and silos deeper than

10 meters. Electrode length 1 ... 40 m.

• GRLM–70_–37 Coated rope electrode without weight (rope coated with polyamide),

for level measurement of sticky bulk solids (our, cement, etc.). Anchoring

with cable clamps and eye ring. Recommended anchoring in storage tanks

and silos deeper than 10 meters. Electrode length 1 ... 40 m.

 

GRLM–70 © Dinel, s.r.o.

GRLM–70_–20

GRLM–70_–00

GRLM–70_–13

Procesní připojení

Tri-clamp

GRLM–70_–10 GRLM–70_–11(12)

 

holder of

electrode

* Details on rope length, attachment or shortening for version GRLM-70_-36 (37) on pages 22 and 37.

GRLM–70_–30(33,34,35) GRLM–70_–36(37)

GRLM–70_–32

Anchoring eye for variant

GRLM-70_-33 (35)

GRLM–70 © Dinel, s.r.o.

 

Please follow next 4 steps:

 

 

 

High temperature performance

GRLM–70_T

performance "H1"

cable gland for protective hose M16

performance "B1"

plastic cable gland M16

performance "B2"

plastic cable gland M20

 

• Install the level meter into the upper lid of the tank or reservoir using a welding ange or

fastening nut.

• The min. distance to install the level meter into a lid or a ceiling of a tank from the tank wall or

bottom is given in table below.

• Otherwise, the level meter install as far as possible from the walls, to the middle between the

wall and the vertical inlet, see Fig. 1., 2, 3 and 4.

BASIC INFORMATIONS VALID FOR: all types

E – The length electrode

t – Maximum measuring range

m – Dead zone on the beginning of electrode

k – Dead zone on the end of electrode or the length of

weight (110 mm) at the rope

d – The distance from the tank wall (see. Tab. above)

h – The distance from the bottom (see. Tab. above)



type of

wall

(without ref. tube)

(with ref. tube)

metal ≥ 300 mm*any distance

non-metal ≥ 500 mm* any distance

* it is recommended that a smaller distance from a wall is consulted

with the manufacturer.



type of

electrode h

rod

(no anchoring)

≥ 100 mm2) (length of electrode to 2 m)

≥ 150 mm2) (length of electrode over 2 m)

rope

(no anchoring)

≥ 100 mm (length of electrode to 10 000 mm)

≥ 150 mm (length of electrode over 10 000 mm)

2) In case of a sloping bottom the distance "h" should be twice as long.

Fig. 1: Level meter

installation with the

rod electrode

Fig. 3: Level meter

installation with the rope

electrode

Fig. 4: Level meter

installation with the rope

electrode without weight

Fig. 2: Level meter

installation with the

reference tube

GRLM–70 © Dinel, s.r.o.

• It is an area in which continuous level measurement takes place. The maximum measur-

ing range is determined by the length of the measuring electrode with the subtraction of

dead zones at the beginning and at the end of the electrode, see Figs. 1, 2, 3, and 4. This

range is also the default setting of the level meter. The maximum measuring range can be

reduced by the user by changing the minimum and maximum levels in case of obstacles

near the end or in particular at the beginning of the measuring electrode.

• If the measured level falls out of the measuring range limits, the level meter will enter the failure

mode and the output current will resume the value that was set by the user, see service settings

– Failure Mode, p. 38 (the default value for the failure mode is provided in the Default Settings

Table, p. 57). For the M Modbus version, the corresponding bits of the measurement status

MEASURING RANGE VALID FOR: all types

• In connection with the measurement principle, electromagnetic waves reected in the area im-

mediately below the level meter and also at the end of the electrode cannot be evaluated (see

Figs. 1, 2, 3, and 4). These zones determine either the minimum possible distance between

the level meter and the highest level (“m” parameter) or the minimum distance at the end of the

electrode (“k” parameter). The level meter must be installed in such a way that the level

does not interfere with the dead zones at the maximum and minimum possible lling of

the storage tank.

• The size of the dead zone is shown in Figs. 49–52 on pages 51, 52.

DEAD ZONE VALID FOR: all types

• For correct measurement, it is im-

portant to avoid installing the level

meter in a high input neck or high

welding ange. If this is not possible,

the level meter may be installed in

a short input neck, the parameters

of which are provided in g. 5. Here

it applies that the neck diameter se-

lected should be as large as possi-

ble but the neck height should be as

small as possible.

Fig. 5: Level meter installation

in the input neck

a ≤ b

b ≥ 50 mm

a – neck height

b – neck width

INPUT NECK VALID FOR: all types except GRLM-70_-20

When installing the level meter

into an input neck, use the

TEACHING procedure (see

chapter11.2. Basic settings). This

will put the sensor into a mode

that suppresses false reections.

• The end of the socket or the welding

ange must not have an extension

into the tank in Fig. 6.

• Dimension restrictions of the input

nozzle does not apply to the use of

GRLM-70_-20 with reference tube.

Fig. 6: Incorrect welding ange

mounting to the tank

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