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GUARANTEE
YEARS
OMM 37
3 1/2 DIGIT
DC VOLTMETER/AMMERMETER
PROCESS MONITOR
THERMOMETER FOR Pt 100
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1
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. sr.o.
Vodňanská 675/30
19800 Prague 9
Czech Republic
Tel: +420 - 281040200
Fax: +420 - 281040299
e-mail: [email protected]
www.orbit.merret.cz
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INSTRUCTIONS FOR USE OMM 37
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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
INSTRUCTIONS FOR USE OMM 37
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2 INSTRUMENT DESCRIPTION
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.
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INSTRUCTIONS FOR USE OMM 37
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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.
1 2 3 4
- -
+
+
POWER
INPUT
1 2 3 4
+
ES- ES+
POWER
-
OM 37DC, PM
OM 37RTD
3INSTRUMENT CONNECTION
INSTRUCTIONS FOR USE OMM 37
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4 INSTRUMENT SETTING
x
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
P1
X1
Jumper X1
1
1 - 2 X.xxx
3 - 4 XX.xx
4 - 5 XXX.
5
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
Full range
Offset
F
O
Brightness regulation
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INSTRUCTIONS FOR USE OMM 37
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4INSTRUMENT SETTING
INSTRUCTIONS FOR USE OMM 37
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5 TECHNICAL DATA
INPUT
the range is fi xed, according to order DC
±199,9 mV 1 MOhm
±1,999 V 1 MOhm
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
±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 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
OPERATING CONDITIONS
Connection: connector terminal board, section up to 2,5 mm
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
RTD
Pt 100 -20°…140°C
Type Pt: 100 Ohm, platinum element, sα=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
2
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INSTRUCTIONS FOR USE OMM 37
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7. TECHNICKÁ DATA
5TECHNICAL DATA
INSTRUCTIONS FOR USE OMM 37
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6 INSTRUMENT DIMENSIONS
Front view
24 mm
Side view
5 mm
48 mm
Panel cut
43,5 mm
22,5 mm
72 mm
Panel thickness: 0,5...20 mm
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INSTRUCTIONS FOR USE OMM 37
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10. ZÁRUČNÍ LIST
nction and
the instr
appl
n
t
f
i
n
m
f sale to the user. Defect
defects caused by:
e repairs unless provided for otherwis
truction
st-guarantee repairs unless provided for otherwise.
S
YEAR
AR
AR
AR
Product OMM 37 DC PM RTD
Type . . . . . . . . . . . . . . . . . . . .
Manufact. No. . . . . . . . . . . . . . . . . . . . .
Date of sale . . . . . . . . . . . . . . . . . . . .
For this instrument applies a guarantee period of 24 months of the date of sale to the user. Defects occurring during this
period due to manufacturing error or due to material faults shall be eliminated free of charge.
7CERTIFICATE OF GUARENTEE
For instrument quality, function and construction the guarantee shall apply provided that the instrument was connected and
used in compliance with the instructions for use.
The guarantee does not apply to defects caused by:
- mechanical damage
- transportation
- intervention of unqualified person including the user
- irreversible event
- other unprofessional interference
The manufacturer performs guarantee and post-guarantee repairs unless provided for otherwise.
u
h
t
rtatio
o
ble even
s
professional interference
u
r
Stamp, signature
INSTRUCTIONS FOR USE OMM 37
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NOTE
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INSTRUCTIONS FOR USE OMM 37
TECHDOK - OMM 37 - 2009 - 6v1 - en - V
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