3 ½ digit MULTIFUNCTION INSTRUMENT
The OMM 323 series are simple 3 ½ digit panel programmable instruments designed for simple applications. Type OMM 323UNI is a multifunction instrument with the possibility of configuration for 8 different input options , easily configurable in the instrument menu. The instrument is based on a single-chip microcontroller and an A/D converter, which ensure good accuracy, stability and easy operation of the instrument.
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3 ½ digit programmable projection
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multifunction input UNI (DC, PM, RTD, T/C, DU)
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digital filters, tare, linearization
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size of DIN 48 x 24 mm
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power supply 10…30 VDC/24 VAC
Technical Data:
Input
*
Number of inputs
1 input
DC
Range
menu selectable
±90 mA
< 1 V
Input 5
±180 mA
< 2 V
Input 5
±30 mV
> 10 MOhm
Input 3
±60 mV
> 10 MOhm
Input 3
±1000 mV
> 100 MOhm
Input 3
±20 V
1,25 MOhm
Input 1
±40 V
1,25 MOhm
Input 1
±80 V
1,25 MOhm
Input 1
PM
Range
menu selectable
±5 mA
< 200 mV
Input 4
±20 mA
< 200 mV
Input 4
4…20 mA
< 200 mV
Input 4
±2 V
1 MOhm
Input 1
±5 V
1 MOhm
Input 1
±10 V
1 MOhm
Vstup 1
OHM
Range
menu selectable
0…100 Ohm
0…300 Ohm
0…1,5 kOhm
0…3 kOhm
0…24 kOhm
0…100 Ohm
0…300 Ohm
0…1,5 kOhm
0…3 kOhm
0…24 kOhm
Connection
2 or 3-wire
RTD
Type
menu selectable
EU > 100/500/1 000 Ohm s 3 850 ppm/°C
-50°…450°C
RU > 50 Ohm s 3 910 ppm/°C
-200°…1 100°C
RU > 100 Ohm s 3 910 ppm/°C
-200°…450°C
US > 100 Ohm s 3 920 ppm/°C
-50°…450°C
Connection
2 or 3-wire
Ni
Type
menu selectable
Ni 1 000/10 000 s 5 000 ppm/°C
-50°…250°C
Ni 1 000/10 000 s 6 180 ppm/°C
-50°…250°C
Connection
2 or 3-wire
Cu
Type
menu selectable
Cu 50/100 with 4 260 ppm/°C
-50°…200°C
Cu 50/100 with 4 280 ppm/°C
-200°…200°C
Connection
2- or 3-wire
T/C
Type
J (Fe-CuNi)
Input 3
-200°…900°C
K (NiCr-Ni)
Input 3
-200°…1 300°C
T (Cu-CuNi)
Input 4
-200°…400°C
E (NiCr-CuNi)
Input 3
-200°…690°C
B (PtRh30-PtRh6)
Input 4
300°…1 820°C
S (PtRh10-Pt)
Input 4
-50°…1 760°C
R (Pt13Rh-Pt)
Input 4
-50°…1 740°C
N (Omegalloy)
Input 3
-200°…1 300°C
L (Fe-CuNi)
Input 3
-200°…900°C
DU
Range
Configuration is performed in two steps:
| 1. | setting numerical value for the beginning and end of the potentiometer range |
| 2. | slider position calibration for the beginning and end of the potentiometer runway |
Potentiometer power supply
2,5 VDC/6 mA, potentiometer resistance > 500 Ohm
External inputs
Number
1 input, on contact
Functions
| OFF | No function |
| HOLD | Stopping measurement (option: Display - Analog output - Limits) |
| TARA | Tare activation |
Projection
Display range
-999…9999, single-coloured 7-segment LED
Display height
9,1 mm
Display colour
red, green
Decimal point
menu adjustable - fixed or floating
Display brightness
menu adjustable, automatically
Settings
Control
The device is controlled and set by four buttons located under the front panel
Selected functions can also be controlled via external inputs
Selected functions can also be controlled via external inputs
Menu
| LIGHT | contains only items necessary for basic device settings with password access |
| PROFI | Full device settings with password access |
| USER | User menu of any item, selected from LIGHT/PROFI. Access without password. |
OM Link
Company communication interface for operation, setting and update of device firmware
OM Link program is also designed for visualization and filing of meas. values from more instruments
OM Link program is also designed for visualization and filing of meas. values from more instruments
Instrument accuracy and functionality
Temperature coefficient
50 ppm/°C
Accuracy
±0,15 % of range + 1 digit
±0,3 % of range + 1 digit (T/C)
(for projection -999…1999 and 5 measur./s)
±0,3 % of range + 1 digit (T/C)
(for projection -999…1999 and 5 measur./s)
Accuracy of cold junction measurement
±1,5°C
Rate
0,5…20 measur./s
Overload capacity
2x; 10x (t < 30 ms)
Resolution (RTD, T/C)
1°C, 0,1°C
Wire compensation (RTD, OHM)
< 30 Ohm
Cold junction compensation
adjustable -20°…99°C, automatic
Linearization
linear interpolation in 25 points (only via OM Link)
Digital filters
| exponential mean | from 2…100 measurements |
| rounding | setting projection step for display |
Functions
| Tare | designed to reset display on non-zero input signal |
Watch-dog
reset after 500 ms
Calibration
at 25°C and 40 % r.h.
Power supply
Power supply
10…30 VDC/24 VAC, ±10 %, PF > 0,4, I < 45 A/1 ms, isolated
Current draw
< 1,0 W/1,1 VA
Operating conditions
Connection
connector terminal board, cable section < 1,5 mm2
Stabilization period
within 15 minutes after switch on
Operating temperature
-20°…60°C
Storage temperature
-20°…80°C
Protection class
IP42 (front panel only)
El. safety
EN 61010-1, A2
Dielectric strength
2,5 kVAC within 1 min. between pow. supply and input
Insulation resistance
for polution degree II, measuring cat. III.
| power supply | 300 V (ZI)* |
EMC
EN 61326-1
Mechanical properties
Material
Noryl GFN2 SE1, non-inflammable UL 94 V-I
Dimensions
48 x 24 x 72 mm (w x h x d)
Panel cutout
43,5 x 21,5 mm (w x h)
US 7151 
BR 4236 
CA 1695 
AU 1641 
TH 1552 
JP 1472 
SG 1222 
VN 1169 
