Orbit Merret 651UC User manual

OM 651UC
6 DIGIT PROGRAMMABLE
IMPULSE COUNTER
FREQUENCYMETER
STOP-WATCH/WATCH
GUARANTEE
YERS

2
INSTRUCTIONS FOR USE OM 651UC
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 651 series conform to European regulation 89/336/EWG and Ordinance
168/1997 Coll.
They are up to the following European and Czech standards:
CSN EN 55 022, class B
CSN 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.
Vodnanská 675/30
198 00 Prague 9
Tel: +420 - 281 040 200
Fax: +420 - 281 040 299
e-mail: [email protected]
www.orbit.merret.cz

3
1. CONTENTS
1. CONTENTS
1. Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Instrument description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Instrument setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
setting the decimal point and the minus sign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
access into the configuration mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Minimum Instrument setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 User menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2.1 Limits - entering values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2.2 Setting the display brightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Configuration menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3.1 Configuration mode - iNPUTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.1.1 Reseting the counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.1.2 Instrument configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.1.2.1 Setting the measuring mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.1.2.2 Setting the measuring time/time base. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.1.2.3 Setting the input filter parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.1.2.4 Setting the display status backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.1.2.5 Time setting . . . . . . . . . . . . . . . . . . . . . . . . . . H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.1.2.6 Setting the Stop-watch/watch control. . . . . . H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.1.2.7 Setting the stop-watch/watch control - Resetting H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.1.2.8 Setting the display status backup . . . . . . . . . H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.1.3 Setting the auxiliary input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.1.4 Permission to reset by the enter key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.2 Configuration mode - CHANNELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.2.1 Setting the calibration constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.2.2 Offset setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.2.3 Measured value rounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.2.4 Projection format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.3 Configuration mode - OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.3.1.1 Limits - setting the relay mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.3.1.2 Limits - setting the boundaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.3.2.1 Data output - setting the transmission rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.3.2.2 Data output - setting the instrument address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.3.3.1 Analog output - setting the type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.3.3.2 Analog output - setting the range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3.3.3.3 Setting the display brightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3.4 Configuration mode - SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3.4.1 Setting the access rights for „User mode“ - limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3.4.2 Return to manufacture calibration/setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3.4.3 Setting new access password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3.4.4 Instrument identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5. Data protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6. Error statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7. Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8. Instrument dimensions and instal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9. Certificate of guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4
INSTRUCTIONS FOR USE OM 651UC
2. INSTRUMENT DESCRIPTION
DESCRIPTION
The OM 651UC model is a universal 6 digit programmable panel impulse counter/frequency meter and stop-
-watch/watch. The instrument is based on an 8-bit microprocessor, that secures high accuracy, stability and easy
operation of the instrument.
Measuring modes
COUNTER Single-channel counter C-F
FREQUENCY Frequency meter C-F
STOPWATCH Stopwatch H
WATCH Watch H
Programmable display projection
Calibration calibration coefficient may be set in „CM“
Projection -99999...999999 with fixed DP, for measuring modes STOPWATCH/WATCH
with option of setting in format 10/24/60
Time base: 0,5/1/2/5/10 s
Digital filters
Input filter: the instrument allows to filter the input signal and thus suppress undesirable interfering
signals (e.g. relay back-swings). The set parameter indicates maximum possible measured
frequency, that the instrument will process, 5/40/100/200 Hz
Radius of insensitiveness adjustable in digits
Functions
Preset initial non-zero value which is read always after instrument resetting
Rounding setting the projection step for the display
OM Link company interface for instrument control, setting and update
External control
Hold display and outputs
Lock control keys locking
Resetting resetting to zero/presetting the counter

5
2. INSTRUMENT DESCRIPTION
OPERATION
The instrument is set and controlled by five control keys located on the front panel. All programmable settings of the
instrument are realised in two adjusting modes:
Configuration menu (hereinafter referred to as „CM“) is protected by an optional numeric code and containis
complete instrument setting
User menu may contain arbitrary programming setting defined in CM with another selective restriction
(see, change)
All programmable parameters are stored in the EEPROM memory (they hold even after the instrument is switched
off).
EXTENSION
Comparators are assigned to control two limit values with relay output. The limits have adjustable hysteresis within
the full display range as well as selectable delay of the switch-on in the range 0…99,9 s. Reaching the preset limits
is signalled by LED and by the switch-on of relevant relay.
Excitation is suitable for feeding sensors. It has a galvanic isolation with fixed value of 15 VDC.
Data outputs are for their rate and accuracy suitable for transmission of measured data for further projection or
directly into the control systems. We offer isolated RS232 and RS485 with the ASCII protocol.
Analog outputs will find their place in applications where further evaluating or processing of measured data in
external devices is required. We offer universal analog output with the option of selection of the output type - vol-
tage/current. The analog output value corresponds with the displayed data and its type and range are selectable
in the programming mode.
Time back-up by the RTC circuit is designed for the „WATCH“ measuring mode and secures time measurement
even when the instrument is switched off (without projection on the display).
FIRMWARE www.orbit.merret.cz/update
Considering the continuous development and innovation of our products it is now possible to download the most
recent program version for every instrument directly from web pages. To install the program, the HW programmer
Flash Nec has to be used.
Prior performing the update it is possible to store all instrument settings and to restore all setting to initial status after
the programming has been completed.
Number of the current program version in your instrument you can find in the „Configuration menu - service - iden-
tification“
The function for recording the new Firmware is supported in all
instruments from version 060

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INSTRUCTIONS FOR USE OM 651UC
3. CONNECTION
The supply lead for feeding the instrument should not be in the proximity of low-potential input 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 and connect correctly (only on
one side) to ground terminal GND (No.13) .
The instruments are tested in compliance with standards for use in industrial area, yet, we recommend to abide by
the above mentioned principles.
CONNECTION
Description wiring
Input 1 input signal < 60 V GND + Input 1
Input 2 input signal < 300 V GND + Input 2
Resetting input signal < 60 V GND + Resetting
Function Description Control
Hold Instrument blocking (display and outputs) upon contact, terminal (No. 11/12)
Lock Keyboard locking upon contact, terminal (No. 11/12)
Grounding on terminal „E“ must be connected at all times
12 3
-
E N
L
+
POWER SUPPLY
AO/Excitation
TxD
GND
RxD
Rx/Tx- Rx/Tx+
GND
232
232
485
485
-
+
8910
GND
Hold/Lock INPUT 1 Reset
-
+
+
GND
14 15 1611 12 13
L2
L1
4567
INPUT 2
+

7
3. INSTRUMENT CONNECTION
3.1 CONFIGURATION OF JUMPERS
Setting the comparator levels
Jumpers
J1, J2
Type
of input
Input
voltage 1
Comparator levels - Input 1* Input
voltage 2
Comparator levels - Input 2*
L > H H > L L > H H > L
1 - 2 NPN, Contact xxx 0,5 V 4,5 V - - - Prohibited Prohibited
not TTL (PNP) 5 - 18 V 0,5 V 4,5 V - - - Prohibited Prohibited
3 - 4 PNP 31 - 60 V 3,3 V 30 V 180 - 300 V 20 V 180 V
4 - 5 PNP 18 - 31 V 1,9 V 17 V 100 - 180 V 10 V 92 V
2 - 3 !!! D O N O T C O N N E C T !!!
*values guaranteed in full temperature range of the instrument operation
Relay parameters specified in the technical data apply for resistance load. Upon connection of the induction load we recommend to fit the leads to relay 1 A with a fuse for maximum load protection.
J1 - Input 1/2
J2 - Reset
1
5
J3 - Battery
J2
J3
J4
J4 - Programming conector
Connection battery for time backup
For settings see table
Service function
J1
For each jumper setting disconnect the instrument from the net

8
INSTRUCTIONS FOR USE OM 651UC
4. INSTRUMENT SETTING
The instrument is set and controlled by 5 control keys located on the front panel. By means of these control keys it is
possible to browse through the operting program, to select and set the required values.
CONFIGURATION MODE USER MODE
• designated for professional service and maintenance • designated for instrument service
• complete instrument setting • may contain setting the limits, analog and
• access is password protected data output and brightness, with restriction as
• authorization for "User mode" per the setting in "Configuration mode"
SYMBOLS USED IN THE INSTRUCTIONS
DEF Items indicated this way are preset from manufacture
C-F HIndicates the setting for given type of instrument
CONTROL KEYS FUNCTIONS
MENU ENTER LEFT DOWN UP
Measuring mode
menu access
Moving around in the menu
exit menu without
saving move to next level back to previous level move to next item
Setting/selecting - items
cancel setting without
saving confirm selected item move down move up
Setting - numbers
cancel setting without
saving confirm selected number move to higher decade change of current figure - down - change of current figure - up -
12
Relay status
ON the digit is lit
OFF the digit is not lit
OFF the digit is flashing
limits with restriction
(hysteresis, delay)
Measured value

9
4. INSTRUMENT SETTING
SETTING THE DECIMAL POINT AND THE MINUS SIGN
DECIMAL POINT
Upon modification of the edited number in the menu the decimal point is set by key with transition beyond the
highest decade, when the decimal point starts flashing. Positioning is performed by , and confirmation by with
return into number editing.
Decimal point for display projection is set in item „CHANNEL > FORMAT“ by selection from preset values.
MINUS SIGN
Setting the minus sign is performed on the highest valid degree by key / .
The minus sign is in numeric row (0, 1, 2, 3...9, --).
Setting
after transition beyond the highest
decade the decimal point starts flashing
by pressing you will place the DP
and confirmit by
ACCESS INTO THE CONFIGURATION MODE
000000
6x shift left
positioning of
flashing DP
confirmation of
the option and
return to superior
item
The code is always preset from manufacture to0000. Incase of loss of access password it
is possible to use universal access code "8177"
HESLO
INPUT
OUTPUT
CHA N EL
0000
shift left
OK
without saving 0,1,2…
9,8,7…
+
SERVIC.

10
INSTRUCTIONS FOR USE OM 651UC
4.1 MINIMUM INSTRUMENT SETTING
All settings are performed in the „Configuration menu“
Selecting the measuring mode
INPUT
SERVIC. .
OUTPUT
CHA N EL
CLR. C.
AUX.INP.
CONFIG
COU N T.
FREQV .M.P.S.
MODE
BACKUP
FI L T E R
KEYS
MODE Setting the instrument
measuring mode
COU N T.Impulse counter
- measures at Input 1 or 2
FREQV .Frequency meter
- measures frequency at Input 1 or 2
Setting display projection
INPUT
SERVIC. .
OUTPUT
CHA N EL
SCALE
CONST. F
Offset
FORMAT
NAST.A Setting basic channel
parameters
SCALE Calibration constant
- calibration constant is for the conversion of
input value to required display value
- by setting the minus value the direction of
counting changes, i.e. we count down
- range: -0,00001...999999
- DEF = 1
OFFSET Additive constant,
PRESET“
- shifting the beginning of measurement by
a set value which will always be read upon
resetting the instrument to zero
- range: -99999...999999
- DEF = 0
In “Mode 2“ (stopwatch/watch) this item is not visible according to the order code