Orbit Merret OM 36DC, OM 36, OM 36PM, OM 36AC, OM 36OHM User Manual

1

OM 36

3 1/2 DIGIT

DC VOLTMETER/AMMETER
AC VOLTMETER/AMMETER

PROCESS MONITOR

OHMMETER

THERMOMETER FOR PT 100

GUARANTEE

YERS

2

INSTRUCTIONS FOR USE - OM 36

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 OM 36 series conform to European regulation 89/336/EWG and Ordinance 168/1997
Coll.

They are up to the following European 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

Power supply from the main line has to be isolated from the measuring leads.

ORBIT MERRET, spol. s r.o.

Vodňanská 675/30
198 00 Praha 9
Czech Republic

Tel: +420 - 281 040 200
Fax: +420 - 281 040 299
e-mail: [e-mail]
www.orbit.merret.cz

3

1. CONTENTS

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

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

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

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

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

4.1 Change of projection on the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.2 Setting the excitattion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5. Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

6. Instrument dimensions and installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

7. Declaretion of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

8. Certificate of guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

1. CONTENTS

4

INSTRUCTIONS FOR USE - OM 36

2. INSTRUMENT DESCRIPTION

DESCRIPTION

The OM 36 model series are simple 3 1/2 digit panel instruments, which are manufactured in the following alternatives:

DC DC voltmeter/ammeter
AC AC voltmeter/ammeter
PM Process monitor
OHM Ohmmeter
RTD Thermometer for sensors Pt 100

The instrument is based on a simple converter, which secures high accuracy and stability.

ADJUSTABLE DISPLAY PROJECTION

Setting by potentiometers under the front panel (in the range of approx. ±10 %)
Projection ±1999

OPERATION

The instrument is designed for simple measurement without further control.
Placement of the decimal point is selectable by shorting link under the front panel.

EXTENSION

Excitation is suitable for feeding of sensors and transducers. It has a galvanic isolation with continuously adjustable value

in the range of 2...24 VDC.
Analogue outputs will find their place in applications where further evaluating or processing of measured data in external

devices is required. We offer several types of current or voltage non-isolated outputs. The value of analogue output corre­sponds with the input signal.

5

3. CONNECTION

3. CONNECTION

The supply lead for feeding the instrument should not be in the proximity of low-potential signals.
Contactors, motors with larger input and other efficient elements should not be in the proximity of the instrument.
The lead into the instrument input (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.

OM 36OHM OM 36PM OM 36AC

OM 36DC

OM 36RTD

L

N

E

+

+

- -

+

-

Analog output

POWER SUPPLY

INPUT 1

Excitation

2 3 1

+

-

+

INPUT 2

4 5 6 7

GND

8 9 10 11

INPUT 1

INPUT 2

GND

8 9 10 11

E+

S-

E-

S+

ES- ES+

INPUT

+

-

E+

S-

E-

S+

E-

ES+ ES-

ES+ S-

MEASURING RANGE

Type Input 1 Input 2

OM 36 DC - U

±199,9 mV; ±1,999 V; ±19,99 V ±199,9 V; ±300 V

OM 36 DC - I

±199,9 νA ±1,999 mA; ±19,99 mA
±199,9 mA, ±1,999 A; ±5,00 A

OM 36 AC - U

0…199,9 mV; 0…1,999 V; 0…19,99 V 0…199,9 V; 0…300 V

OM 36 AC - I

0…1,999 mA; 0…19,99 mA; 0…199,9 mA
0…1,999 A; 0…5,00 A

6

INSTRUCTIONS FOR USE - OM 36

4. INSTRUMENT SETTING

ADJUSTING ELEMENTS

after removing the top cover frame the following settings are accessible
decimal point - may be adjusted by shorting links

P1 setting the display brightness
P2 setting the zero

- in the DC and AC types it does not always have to be fixed

- in the RTD and OHM types this trimmer is used for compensation of conduct resistance

P3 setting the full range

- nastavení zobrazení displeje (cca ±10 %)
X1 setting the decimal point

- by jumper
X2 setting the measuring rate

- by jumper

1 - 1 X.xxx
2 - 2 XX.xx
3 - 3 XXX.x

Jumper X1, Decimal point

1

3

X2

P1

P2

P3

X1

1 - 2 1,2 m/s
5 - 6 2,5 m/s
2 - 3 5 m/s
5 - 4 10 m/s

Jumper X2, measuring rate

1

3 4

6

7

4. INSTRUMENT SETTING

4.1 CHANGE OF PROJECTION ON THE DISPLAY

The measuring range and projection of the display are set from manufacture pursuant to customer requirements stated in the
order form for which the manufacturer declares validity of the catalogue technical parameters.

Under certain conditions, i.e. the expertise and technical equipment, the change in instrument parameters may be performed
pursuant to the following procedure.

SOLDERING JUMPERS

Type Range Counting the input divider J1 J2 J3 J4

I < 90 mA Shunt R

7

with loss 200 mV or resistances R8, R

11

link link

I < 5 A R

8

, R11 for shunt R7 - loss 200 mV link

U < 200 mV Set by changing R

8

= 750 Ohm, without R8, R

11

link

U < 60 V R8, R

11

U < 300 V R1, R8, R9 remove link B
Pt 100 Without R

1

, R7, R11, remove link A cut link

WIRING DIAGRAM

MIN

R38

2k

J12

1

2

3

R3

R4

82k

82k

+UR

-UR

R5

short

J11

1

2

OFFSET

1k

56k

R14

R23

R24

4k7

MAX

+UR

PROJECTION

DISPLAY

I
N
4

ANALOGUE

DISPLAY

1

2

J4

1

1

1

1

1

2

2

2

2

2

J8

J3

J1

J2

J3

R7
shunt

R20

13R1

Voltage input

R9

Rvar

R8

Rvar

R10

Rvar

R1

1

Rvar

R1

Rvn

Pt 100/Resistance input

INPUT

11

X20

Connection of side input card

I
N
3

I
N
2

I
N
1

O
U

T

C
O
M

+
5
V

G
N
D

­5
V

O

F
F

S

O

R
E
F

A

VCC

VBB

When using input card

link A must be disconnected!

10

8
9

Current input

8

INSTRUCTIONS FOR USE - OM 36

CHANGE OF PROJECTION RANGE

Voltage Input < 60 V

- R

8

has value of 1MOhm

Voltage Input > 60 V

- R

8

has value of 1,22 MOhm, 2x 511 kOhm in series

Current Input

Zero offset

R

8

may be replaced by series/parallel combination of two resistances R8 a R

9

R10 may be replaced by series/parallel combination of two resistances R10 a R

11

ZERO OFFSET - SOLDERING JUMPERS

Jumper Offset

J11 - link none

J12 - link, to connector negative

J12 - link, to display positive

R8 x (D

max

- D

min

)

10 000 x (U

max

- U

min

) - (D

max

- D

min

)

R

10

=

R1 x (D

max

- D

min

)

10 000 x (U

max

- U

min

) - (D

max

- D

min

)

R

10

=

D

max

- D

min

10 000 x (I

max

- I

min

)

R

7

=

P

od

Pdo - P

od

R5 = 2 000 x

24 600 000

Pdo - P

od

R3 =

- 2 000 - R

5

R8 x R

9

R8 + R

9

R8 =

R10 x R

11

R10 + R

11

R10 =

9

LEGEND

R8, 9 and R10 ,11 resistances of input divider for range < 60 V
R1 and R8, 9 resistances of input divider for range > 60 V
R

3(4), 5

resistances for zero offset, R5 is, as a standard, replaced by short-circuit
Pod, Pdo offset values (in divisions 0…1999) for extreme positions of the potentiometer „ MIN“
U

min

minimum value of input voltage (in Volts)

U

max

maximum value of input voltage (in Volts)

D

min

minimum value on display (in divisions)

D

max

maximum value on display (in divisions)

I

min

minimum value of input current (in Amperes)

I

max

maximum value of input current (in Amperes)

X6

Excitation

4. INSTRUMENT SETTING

10

INSTRUCTIONS FOR USE - OM 36

4.2 SETTING THE EXCITATION

Excitation is, as a standard, set for 24 VDC.

Change in adjustment of the excitation value is performed by trimmer located over the terminal boards of the instrument (see
picture).

231 4 5

891011

Excitation

11

4. INSTRUMENT SETTING

12

INSTRUCTIONS FOR USE - OM 36

MEASURING RANGE

the range is fi xed, according to order DC
±199,9 mV 1 MOhm Input 1
±1,999 V 1 MOhm Input 1
±19,99 V 1 MOhm Input 1
±199,9 V 1 MOhm Input 2

±300 V 2 MOhm Input 2

±199,9 μA < 260 mV Input 1
±1,999 mA < 260 mV Input 1
±19,99 mA < 260 mV Input 1
±199,9 mA < 200 mV Input 1
±1,999 A < 200 mV Input 1
±5,00 A <50 mV Input 1

the range is fi xed, according to order AC
0…199,9 mV 1 MOhm Input 1
0…1,999 V 1 MOhm Input 1
0…19,99 V 1 MOhm Input 1
0…199,9 V 1 MOhm Input 2

0…300 V 2 MOhm Input 2

0…1,999 mA < 260 mV Input 1
0…19,99 mA < 260 mV Input 1
0…199,9 mA < 200 mV Input 1
0…1,999 A < 200 mV Input 1
0…5,00 A < 50 mV Input 1
Frequency range: 40…2 500 Hz

the range is fi xed, 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
the range is fi xed, according to order OHM

0...199,9 Ohm

0...1,999 kOhm

0...19,99 kOhm

5...105 Ohm
Connection: 2 or 4 wire

the range is fi xed, according to order RTD
Pt xxx ±199,9°C or -200°...850°C
Type Pt: 100/500/1 000 Ohm, platinum, 3850 ppm
Connection: 2, 3 or 4 wire

PROJECTION

Display: ±1999, red or green LED, digit height 14 mm
Decimal point: adjustable by jumper
Brightness: adjustable by potentiometer under the front panel

INSTRUMENT ACCURACY

TC: 100 ppm/°C
Accuracy: ±0,1 % of range
±0,3 % of range (< 100 Hz, crest faktor 1-2) AC
±0,2 % z range OHM
Resolution: 0,1° or 1°C RTD
Rate: 1,2 - 2,5 - 5 - 10 measurements/s
Overload capacity: 10x (t < 100 ms) - not for 5 A and 300 V
2x (long-term)
Calibration: at 25°C and 40 % r.h.

ANALOGUE OUTPUTS

Type: non-isolated,
the output corresponds with the input signal
Nonlinearity: 0,3 % of range
TC: 100 ppm/°C
Rate: response to change of value < 100 ms
Voltage: 0…2 V, 0…5 V, 0…10 V
Current: 0…5/20 mA/4…20 mA

- compensation of conduct up to 600 Ohm

EXCITATION DC/AC/PM

Adjustable: 2...24 VDC/50 mA, isolated

POWER SUPPLY

24/110/230 VAC, 50/60 Hz, 5 VA, ±10%

12...24 VDC, max. 150 mA

12...30 VDC, max. 300 mA, isolated

MECHANIC PROPERTIES

Material: Noryl GFN2 SE1, incombustible UL 94 V-I
Dimensions: 96 x 48 x 110 mm
Panel cut-out: 92 x 45 mm

OPERATING CONDITIONS

Connection: con. terminal board, conductor section up to 2,5 mm

2

Stabilization period: within 15 minutes after switch-on
Working temp.: 0°…50°C
Storage temp.: -10°…85°C
Shielding: IP42, upon request IP64 - front panel only
Construction: safety class I
Overvoltage cat.: EN 61010-1, A2
III. - instrument power supply (300 V)
II. - input, output, excitation (300 V)
for pollution degree II
EMC: EN 61000-3-2+A12; EN 61000-4-2, 3, 4, 5, 8, 11;

EN 550222, A1, A2

5. TECHNICAL DATA

13

6. INSTRUMENT DIMENSIONS

6. INSTRUMENT DIMENSIONS

96 mm

48 mm

Panel cut

Panel thickness: 0,5...8 mm

Side view

Front view

92 mm

45 mm

8 mm

110 mm

14

INSTRUCTIONS FOR USE - OM 36

7. DECLARATION OF CONFORMITY

Company: ORBIT MERRET, spol.s r.o. (Ltd.)
Klánova 81/141
142 00 Prague 4
Czech Republic
IDNo: 00551309

Manufactured: ORBIT MERRET, spol.s r.o. (Ltd.)
Vodňanská 675/30
198 00 Prague 9
Czech Republic

declares at its full responsibility that the product presented hereunder meets all technical requirements, is safe for use when
utilised under the terms and conditions determined by ORBIT MERRET, spol.s r.o. and that our company has taken all measures
to ensure conformity of all products of the type listed hereunder, which are being brought out to the market, with technical
documentation and requirements of the appurtenant statutory orders.

Product: 3 1/2 - digit programmable panel instrument

Type: OM 36, in versions: DC, AC, PM, OHM, RTD

Mode of asses. of conformity: §12, par. 4 b, d of Act No.22/1997 Sb.

Conformity is assessed pursuant to the following standards::
Electrical safety: EN 61010-1

EMC: EN 50131-1, par. 14 and par. 15
EN 55022
EN 61000-3-2 + A12, Cor. 1, change A1, change A2
EN 61000-4-2
EN 61000-4-3
EN 61000-4-4
EN 61000-4-5
EN 61000-4-6
EN 61000-4-8
EN 61000-4-11, par. 5.1 and par. 5.2
and government ordinance:

Electrical safety: No. 168/1997 Sb.
EMC: No. 169/1997 Sb.

The evidence are the protocols of authorized and accredited organization:
VTÚE Praha, experimental laboratory No. 1158 accredited by ČIA, o.p.s. with EN ISO/IEC 17025

Place and date of issue: Prague, 14. januar 2001 Miroslav Hackl
Company representative

15

8. CERTIFICATE OF GUARANTEE

Product OM 36 DC AC PM OHM RTD

Type . . . . . . . . . . . . . . . . . . . .

Manufacturing No. . . . . . . . . . . . . . . . . . . . .

Date of sale . . . . . . . . . . . . . . . . . . . .

A guarantee period of 24 months from the date of sale to the user applies to this instrument.
Defects occuring during this period due to manufacture error or due to material faults shall be eliminated free of charge.

For instrument quality, function and construction the guarantee shall apply provided that the instrument was connected and
used in compliance with the instruction for use.

The guarantee shall not apply for defects caused by:

- mechanic damage

- in transport

- intervention of unqualified person incl. the user

- unavoidable event

- other unprofessional interventions

The manufacturer performs the guarantee and post-guarantee repairs unless provided for otherwise.

Stamp, signature

8. CERTIFICATE OF GUARANTEE

transport

navoidable event

performs the g

instrument.

s

e

ri

o

d

u

a

n

c

h

a

- m

- in

- in

- u

- o

r

i

n

tru

instruction for use.

unction and construction the guarantee shall apply provided that the i

s the guarantee and post-guarantee repairs unless provided for othe

tamp, signature

. . .

. . .

ARANTEE

. . . . . . . . . . . . . . .

.

. . . . . . . . . . . . .

S

YE

R

R

16

INSTRUCTIONS FOR USE - OM 36

TECHDOK - OM 36 - 2008 - 6v1 - en

Austria

ING.E. GRUBER GmbH
Edu. Kittenberger Gasse 97 Top2
A-1230 Wien
tel: +43 - 1 - 869 23 39-0
fax: +43 - 1 - 865 18 75
e-mail: [e-mail]
www.gruber-components.at

The Netherlands

AE SENSORS B.V.
J. Valsterweg 92
3301 AB Dordrecht
tel: +31 - 78 - 621 31 52
fax: +31 - 78 - 621 31 46
e-mail: [e-mail]
www.aesensors.nl

Slovakia

TECHREG, s.r.o.
Dukelských hrdinov 2
984 22 Lučenec
tel: +421 - 47 - 433 15 92
fax: +421 - 47 - 433 15 92
e-mail: [e-mail]
www.techreg.sk

USA

METRIX Instruments Co.
1711 Townhurst Dr.
Houston, Texas 77043-2899
tel: +1 - 713 - 461 21 31
fax: +1 - 713 - 461 82 83
e-mail: [e-mail]
www.metrix1.com

Germany

MEGATRON Elektronik AG & Co.
Hermann-Oberth-Str. 7
85640 Putzbrunn/München
tel: +49 - 89 - 460 94 - 0
fax: +49 - 89 - 460 941 01
e-mail: [e-mail]
www.megatron.de

Russian Federation

РОCПРИБОР ЗАО
Россия, 111 033, Краснодар

ул. Авиамоторная, 50
тел.: [phone]
факс: [phone]
e-mail: [e-mail]
www.rospribor.ru

Switzerland

ORBIT CONTROLS AG
Zürcherstrasse 137
8952 Schlieren
tel: +41 - 1 - 730 27 53
fax: +41 - 1 - 730 27 83
e-mail: [e-mail]
www.orbitcontrols.c

Lithuania

RIFAS UAB
Tinklu g. 29a
LT-5300 Panevéžys
tel: +370 - 5 - 510 400
fax: +370 - 5 - 582 729
e-mail: [e-mail]
www.metrix1.com

Russian Federation

ПО Интерфейс
Россия, 350020, Краснодар

ул.Шоссе Нефтяников, 9/1
тел.: [phone]
факс: [phone]
e-mail: [e-mail]
www.orbit.merret.ru

Ukraine

OOO <KOTRIS>
Nesterova 3, Office 907
030 57 Kyjev
tel: +44 - 446 - 21 42
fax: +44 - 446 - 21 42
e-mail: [e-mail]

ORBIT MERRET, spol. s r.o.

Vodnanska 675/30
198 00 Prague 9
Czech Republic

tel: +420 - 281 040 200
fax: +420 - 281 040 299
e-mail: [e-mail]
www.orbit.merret.cz