Orbit Merret OMM 37 Manuel utilisateur

OMM 37

3 1/2 DIGIT

DC VOLTMETER/AMMERMETER

PROCESS MONITOR

THERMOMETER FOR Pt 100

GUARANTEE

YEARS

2|INSTRUCTIONS FOR USE OMM 37

SAFETY INSTRUCTIONS

Please, read the enclosed safety instructions carefully and observe them!

These instruments should be safeguarded by isolated or common fuses (breakers)!

For safety information the EN 61 010-1 + A2 standard must be observed.

This instrument is not explosion-safe!

TECHNICAL DATA

Measuring instruments of the OMM 37 series conform to the European regulation 89/336/EWG

and the Ordinance 168/1997 Coll.

They are up to the following European and Czech standards:

EN 55 022, class B

EN 61000-4-2, -4, -5, -6, -8, -9, -10, -11

The instruments are applicable for unlimited use in agricultural and industrial areas.

CONNECTION

Supply of energy from the main line has to be isolated from the measuring leads.

ORBIT MERRET, spol. sr.o.

Vodňanská 675/30

19800 Prague 9

Czech Republic

Tel: +420 - 281040200

Fax: +420 - 281040299

e-mail: [email protected]

www.orbit.merret.cz

INSTRUCTIONS FOR USE OMM 37 |3

1. Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2. Instrument description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3. Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4. Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Setting the decimal point. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Change of projection on the display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5. Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6. Instrument dimensions and installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7. Certificate of guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1CONTENS

4|INSTRUCTIONS FOR USE OMM 37

2.1 Description

The OMM 37 model series include simple 3 1/2 digit panel instruments in these alternatives:

DC DC voltmeter/ammeter

PM Process monitor

RTD Thermometer for Pt 100 sensors

For their dimensions the instruments are suitable for mosaic panel installation.

ADJUSTABLE DISPLAY PROJECTION

Setting by potentiometers from the back of the instrument (in the range of approx. ±10 %)

Projection ±1999

2.2 Operation

The instrument is designed for simple measurement without further control.

Placement of the decimal point is selectable by a jumper under the front panel.

2.3 Option

Isolated supply of the instrument with range of 10…30 VDC is designated for applications where galvanic

separation must be used.

2INSTRUMENT DESCRIPTION

INSTRUCTIONS FOR USE OMM 37 |5

The lead for feeding the instrument should not be in the proximity of the incoming low-potential signals.

Contactors, motors with larger input power and other efficient elements should not be in the proximity of the instrument.

The lead into the input of the instrument (the measured quantity) should be in sufficient distance from all power leads and

appliances. Provided this cannot be secured it is necessary to use shielded leads with connection to ground.

The instruments are tested in compliance with standards for use in industrial area, yet we recommend to abide by the above

mentioned principles.

3INSTRUMENT CONNECTION

OM 37RTD

OM 37DC, PM

- -

1 2 3 4

INPUT

POWER

ES-ES+

1 2 3 4

POWER

6|INSTRUCTIONS FOR USE OMM 37

SETTING BRIGHTNESS AND DECIMAL POINT

After removing the top cover frame the following settings are accessible

- decimal point, by jumper X1

- display brightness, by trimmer P1 under the front panel

MODIFICATION FO THE MEASURING RANGE

The adjusting trimmers for correction of display projection are accessible at the input brackets of the instrument

Full range setting display projection (approx. ±10 %)

Offset shifting zero (compensation of 2-wire lead for OMM 37RTD),

the trimmer is fitted only in the OMM 37PM and RTD model

4INSTRUMENT SETTING

Brightness regulation

Offset

Full range

1 - 2 X.xxx

3 - 4 XX.xx

4 - 5 XXX.

Jumper X1

INSTRUCTIONS FOR USE OMM 37 |7

4INSTRUMENT SETTING

8|INSTRUCTIONS FOR USE OMM 37

INPUT

the range is ﬁxed, according to order DC

±199,9 mV 1 MOhm

±1,999 V 1 MOhm

±19,99 V 1 MOhm

±199,9 V 1 MOhm

±199,9 μA < 260 mV

±1,999 mA < 260 mV

±19,99 mA < 260 mV

±199,9 mA < 260 mV

the range is ﬁxed, according to order PM

0…5 mA < 260 mV

0…20 mA < 260 mV

4…20 mA < 260 mV

±2 V 1 MOhm

±5 V 1 MOhm

±10 V 1 MOhm

RTD

Pt 100 -20°…140°C

Type Pt: 100 Ohm, platinum element, sα=0,00385Ohm/Ohm/°C

Connection: 2 wire

PROJECTION

Display: ±1999, intensive red or green LED,

digit height 9,1 mm

Decimal point: adjustable - by jumper

Brightness: adjustable - by trimmer inside the instrument

INSTRUMENT ACCURACY

TC: 50 ppm/°C

Accuracy: ±0,1 % of range + 1 digit

±0,8 % of range + 1 digit RTD

Resolution: 1°C RTD

Rate: 2,5 measurements/s

Overload: 10x (t < 100 ms), 2x (long-term)

Calibration: at 23°C and 40 % r.h.

POWER SUPPLY

7…12 V AC/DC, max. 100 mA

10…30 V AC/DC, max. 160 mA (DC), 280 mA (AC),

(24 VDC/55 mA), isolated

MECHANIC PROPERTIES

Material: Noryl GFN2 SE1, incombustible UL 94 V-I

Dimensions: 48 x 24 x 75 mm

Panel Cut-out: 43,5 x 22,5 mm

OPERATING CONDITIONS

Connection: connector terminal board, section up to 2,5 mm2

Stabilization period: within 15 minutes after switch-on

Working temp.: 0°…50°C

Storage temp.: -10°…85°C

Cover: IP42, (front panel only))

El. safety: EN 61010-1, A2

Dielectric strength: 2,5 kVAC after 1 min between supply and input

Insulation resistance: for pollution degree II, measuring cat. III.

Power supply, input > 300 V (PI), 250 V (DI)

EMC: EN 61326-1

5TECHNICAL DATA

INSTRUCTIONS FOR USE OMM 37 |9

7. TECHNICKÁ DATA 5TECHNICAL DATA

10 |INSTRUCTIONS FOR USE OMM 37

Panel cut

Side view

Front view

43,5 mm

22,5 mm

48 mm

24 mm

5 mm

72 mm

Panel thickness: 0,5...20 mm

6INSTRUMENT DIMENSIONS

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