Omron K3MA-F - User manual

Frequency/Rate Meter K3MA-F 1
Frequency/Rate Meter
K3MA-F
Highly Visible LCD Display with 2-color (Red
and Green) LEDs
• Contact, NPN, PNP, or voltage pulse input.
• Front-panel key operation for easy setting.
• Average processing function suppresses flicker.
• Includes scaling, auto-zero time, startup compensation time
functions.
• Easy confirmation of max/min display.
• Short 80-mm depth (measured from edge of face plate).
• Finger protective cover (standard equipment) guards against
electric shock.
• Water- and dust-proof NEMA4X (IP66 equivalent) front panel.
• Recognized to U.S. and Canadian requirements under the
Component Recognition Program of UL.
• CE marking.
Model Number Structure
■Model Number Legend
:
1. Input Type
F: Rotary pulse
2. Output Type
None: No output
A2: 2 relay contact outputs (SPST-NO)
3. Supply Voltage
100-240VAC: 100 to 240 VAC
24VAC/VDC: 24 VAC/VDC
Ordering Information
■List of Models
■Accessories (Order Separately)
1 2 3
K3MA-F-@
Input type Supply voltage Output Model
Rotary pulse 100 to 240 VAC None K3MA-F 100-240VAC
2 relay contact outputs (SPST-NO) K3MA-F-A2 100-240VAC
24 VAC/VDC None K3MA-F 24VAC/VDC
2 relay contact outputs (SPST-NO) K3MA-F-A2 24VAC/VDC
Name Shape Model
Splash-proof Soft Cover K32-49SC
Hard Cover K32-49HC

2Frequency/Rate Meter K3MA-F
Specifications
■Ratings
Model K3MA-F 100-240VDC, K3MA-F-A2 100-240VAC K3MA-F 24VAC/VDC, K3MA-F-A2 24VAC/VDC
Supply voltage 100 to 240 VAC 24 VAC/VDC
Operating voltage range 85% to 110% of the rated supply voltage
Power consumption
(under maximum load)
6 VA max. 4.5 VA max. (24 VAC)
4.5 W max. (24 VDC)
Insulation resistance 20 MΩmin. (at 500 VDC) between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Dielectric strength 2,000 VAC for 1 min between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Noise immunity ±1,500 V on power supply terminals in normal or com-
mon mode.
±1 µs, or 100 ns for square-wave noise with 1 ns.
±480 V on power supply terminals in normal mode.
±1,500 V in common mode.
±1 µs, or 100 ns for square-wave noise with 1 ns.
Vibration resistance Vibration: 10 to 55 Hz, Acceleration: 50 m/s2
5 min each in X, Y, and Z directions for 10 sweeps.
Shock resistance 150 m/s2(100 m/s2for relay contact outputs) 3 times each on 3 axes, 6 directions.
Ambient temperature Operating: −10°C to 55°C (with no condensation or icing)
Storage: −25°C to 65°C (with no condensation or icing)
Approved safety standards UL3121-1, conforms to EN61010-1 (Pollution degree 2/overvoltage category II)
Conforms to VDE0106/P100 (finger protection)
EMC (EMI) EN61326+A1 Industry
Emission Enclosure: CISPR 11 Group 1 class A: CISRP16-1/-2
Emission AC Mains: CISPR 11 Group 1 class A: CISRP16-1/-2
(EMS) EN61326+A1 Industry
Immunity ESD: EN61000-4-2: 4 kV contact discharge
8 kV air discharge
Immunity RF-interference: EN61000-4-3: 10 V/m (amplitude-modulated, 80 MHz to 1 GHz)
Electrical Fast Transient Noise: EN61000-4-4: 2 kV (power line)
Immunity Burst Noise: 1 kV line to line (I/O signal line)
Immunity Surge: EN61000-4-5: 1 kV (power line)
2 kV line to ground (power line)
Immunity Conducted Disturbance: EN61000-4-6: 3 V (0.15 to 80 MHz)
Immunity Voltage Dip/Interrupting: EN61000-4-11: 0.5 cycle, 0, 180°, 100% (rated voltage)
Weight Approx. 200 g

Frequency/Rate Meter K3MA-F 3
■Characteristics
■Measuring Ranges
No-voltage Contact/Open Collector Inputs
■Input/Output Ratings
Relay Contact Output
Input signal No-voltage contact (30 Hz max., ON/OFF pulse width: 15 ms min.)
Voltage pulse (5 kHz max., ON/OFF pulse width: 90 µs min., ON voltage: 4.5 to 30 V/OFF voltage:
0 to 2 V)
Open collector (5 kHz max., ON/OFF pulse width 90 µs min.)
Connectable Sensors
ON residual voltage: 2.5 V max.
OFF leakage current: 0.1 mA max.
Load current: Must have switching capacity of 15 mA min.
Must be able to dependably switch a load current of 5 mA max.
Measuring accuracy ±0.1%FS ±1 digit (at 23±5°C)
Measurement method Cycle measurement
Max. displayed digits 5 digits (−19999 to 99999)
Display 7-segment digital display, Character height: 14.2 mm
Polarity display “−” is displayed automatically with a negative input signal.
Zero display Leading zeros are not displayed.
Scaling function Programmable with front-panel key inputs (range of display: −19999 to 99999).
The decimal point position can be set as desired.
Hold function Max hold (maximum value), Min hold (minimum value)
Hysteresis setting Programmable with front-panel key inputs (0001 to 9999).
Other functions Scaling teach function
Display color change (green (red), green, red (green), red)
OUT type change (upper limit, lower limit, upper/lower limit)
Average processing (simple average OFF/2/4/8 operations)
Auto-zero time
Startup compensation time
Setting change lockout
Parameter initialization
Display auto-return time
Output Relays: 2 SPST-NO
Delay in comparative outputs 750 ms max.
Degree of protection Front panel: NEMA4X for indoor use (equivalent to IP66)
Rear case: IEC standard IP20
Terminals: IEC standard IP00 + finger protection (VDE0106/100)
Memory protection Non-volatile memory (EEPROM) (possible to rewrite 100,000 times)
Input Measuring range Measuring accuracy Displayable range
No-voltage contact (30 Hz max.) with
ON/OFF pulse width of 15 ms min.
0.05 to 30.00 Hz ±0.1% FS ±1 digit max.
(at 23±5°C)
–19999 to 99999
(with scaling function)
Open collector (5 kHz max.) with
ON/OFF pulse width of 90 µs min.
0 to 5 kHz
Item Resistive load (cosφ= 1) Inductive load (cosφ= 0.4, L/R = 7 ms)
Rated load (UL ratings) 5 A at 250 VAC, 5 A at 30 VDC 1.5 A at 250 VAC, 1.5 A at 30 VDC
Rated carry current 5 A max. (at COM terminal)
Max. contact voltage 250 VAC, 150 VDC
Max. contact current 5 A (at COM terminal)
Max. switching capacity 1,250 VA, 150 W 250 VA, 30 W
Min. permissible load
(P level, reference value)
10 mA at 5 VDC
Mechanical life 5,000,000 times min. (at a switching frequency of 1,200 times/min)
Electrical life
(at an ambient temperature of 20°C)
100,000 times min. (at a rated load switching frequency of 10 times/min)

4Frequency/Rate Meter K3MA-F
Connections
■Terminal Arrangement
■Block Diagram
Power
supply Output
terminals
Input
terminals
External power supply
+
−
A1
B5
E1
E2
E3
E4
E5
E6
B6
A2
Models with
comparative
output
OUT1
OUT2100- to 240-VAC type or
24-VAC/VDC type
(No polarity for 24-VDC
connection.)
Note: Refer to Input Circuits on page 5.
12 V
40 mA
Terminal No. Name Description
Operation power Connects the operation power supply.
Pulse input No-voltage contact/open collector input
Outputs Outputs the relay outputs.
External power supply Use as the power supply for sensors.
A1 - A2
E4 , E6 - E5
E1 , E2 - E3
B5 - B6
X
Input Input circuit
Micro-
computer
Key
Display
Output
circuit
Contact output
(See note.)
Power supply circuit
Constant voltage circuit
EEPROM
5 V 12 V
Note: Relay output models only.

Frequency/Rate Meter K3MA-F 5
■Input Circuits
Pulse Input
E4
E5
E6
B5
+
−B6
The negative pole of the sensor power
supply and COM are connected
internally.
Pulse
detection
circuit
Voltage
detection
circuit
Voltage pulse
PNP
NPN
12 V
12 V
200 Ω
1 kΩ
10 kΩ
NPN, contact input
PNP, voltage pulse input

6Frequency/Rate Meter K3MA-F
Operation
■Main Functions
Input Types and Ranges
Pulse Frequency Selection
Note: The default value is “0 to 5 kHz (5k).”
Scaling
When the desired display value is set for a corresponding input, the value will be displayed on a line between two points determining the zero point.
Frequency range
(setting parameter)
Function Input range (setting parameters) Setting range
Pulse frequency selection
(p-fre)
Selects pulse input signal. 0.05 to 30.00 Hz (30) Displayable from −19999 to 99999
with scaling function.
The position of the decimal point
can be set as desired.
0 to 5 kHz (5k)
Parameter Setting value Meaning
p-fre 3 0.05 to 30.00 Hz
measurement range
5k 0 to 5 kHz measure-
ment range
Parameter Setting value Meaning Parameter Setting value Meaning
inp 0 to 99999 Input value for dsp dp %.%%%% Display four digits after decimal point
dsp -19999 to 99999 Display value for inp %%.%%% Display three digits after decimal point
%%%.%% Display two digits after decimal point
%%%%.% Display one digit after decimal point
%%%%% No decimal point
• The decimal point can be optionally displayed.
Display value
DISPLAY
Input value
INPUT
Teaching with actual values is possible.
Instead of setting by inputting with the Up Key and Shift Key, current values can be
input as scaling input values for teaching. This is useful for making settings while checking the
operation status of the K3MA-F.
Note: The initial value will change depending on the
pulse frequency selection.
• When displaying the decimal point, consider the
number of digits to follow the decimal point prior to
setting the scaling display value.
• If p-fre is set to 30, the initial setting for the
decimal display will be 000.00.

Frequency/Rate Meter K3MA-F 7
Convenient Functions
Scaling Teach
The parameter (inp) for the K3MA-F’s initial setting level can be set using actual input values with the teaching function. After displaying the pa-
rameter, the actual input settings can be made with the following operation.
OUT Types (Comparative Output Models Only)
OUT 1 and OUT 2 can be set to operate in one of the three following modes in accordance with the compared values:
•Upper limit (High Acting):
The output is turned ON when the measurement value is greater than its set value.
•Lower limit (Low Acting):
The output is turned ON when the measurement value is less than its set value.
•Upper and lower limits (Outside Band Acting):
An upper limit (H set value) and lower limit (L set value) can be set independently.
The output is turned ON when the measurement value is greater than upper-limit set value or less than the lower-limit set value.
The three types of output operations shown above can be combined as desired. The following are examples of possible combinations.
Parameter Initialization
This function returns all of the parameters to their initial values.
Use this to reset the K3MA-F after returning it to its factory-set condi-
tion.
“T” lights to
indicate that the
parameter is valid
for teaching.
Next parameter
Monitor mode
Teaching mode
“T” turns OFF.
“T” flashes.
Normal change
Use to
register and shift to
monitor mode.
Use to shift to
the next parameter
without registering.
Upper Limit (High Acting)
OUT1 value
OUT1 value
Hysteresis
Hysteresis
Hysteresis
Hysteresis
ON
OFF
Output ON
OFF
Output ON
OFF
Output
Measurement value Measurement value Measurement value
OUT1 upper-limit
value
OUT1 lower-limit
value
Lower Limit (Low Acting) Upper and Lower Limits
(Outside Band Acting)
Upper Limit 2-stage Output
Measurement
value
Measurement
value
Measurement
value
OUT2
value
OUT2 upper-limit
value
OUT2 upper-limit
value
OUT1 lower-limit
value
OUT2 lower-limit
value
OUT2 lower-limit
value
OUT1 upper-limit
value
OUT2 ON
OFF
ON
OFF
OUT1
OUT2 ON
OFF
ON
OFF
OUT1
OUT2 ON
OFF
ON
OFF
OUT1
OUT1
value
OUT1 value
Threshold Output Combination of Upper Limit and
Upper/Lower Limits
Parameter Setting value Meaning
init off ---
on Initializes all parame-
ters.

8Frequency/Rate Meter K3MA-F
Average Processing
Average processing stabilizes the display by minimizing any pulsat-
ing or flicker caused by fluctuations in the pulse width of sensor input
or by eccentricity in rotating shafts.
Hysteresis (Comparative Output
Models Only)
The hysteresis of comparative outputs can be set to prevent chatter-
ing in the output when the measurement value fluctuates finely near
the OUT value.
Auto-zero Time
This function sets the time for the display to return to zero when input
pulses stop. Set the time longer than the expected input pulse cycle
(the interval between one input pulse and the next). Proper measure-
ment is not possible if the time is set shorter than the input pulse
cycle.
Startup Compensation Time
The startup compensation time cancels measurement for a predeter-
mined time when turning power ON, to prevent unwanted output due
to temporary input fluctuations.
Changing the Display Color
The color of the value displayed can be set to either red or green. For
comparative output models, the display color can be set to change
from green to red, or from red to green, according to the status of the
comparison criterion.
Display Auto-return Time
This function automatically returns the display to the operation level’s
current value if no keys are pressed for a preset time (called the dis-
play auto-return time).
Move-to-Protect-Level Time
The time required to shift to the protect level can be set as desired.
MAX/MIN Display
The maximum and minimum measurement (display) values from the
time the power is turned ON until the current time can be stored and
displayed. This is useful, for example, when measuring the maximum
value.
Upper limit (high acting)
Measurement value
Set value Hysteresis
Output OFF
ON
Display
Time
Startup
compensation
time
Lower limit
setting
(OUT2)
Power supply
00000 displayed
OUT2
output
8.781
100.05
113.36
OUT1 value
OUT2 value
Red
Red
Green
MAX/MIN
MAX/MIN
MAX/MIN
Current value
MAX value
MIN value
MAX/MIN LEVEL MODE SHIFT UP
MAX/MIN LEVEL MODE SHIFT UP
MAX/MIN LEVEL MODE SHIFT UP
Min
Max

Frequency/Rate Meter K3MA-F 9
Nomenclature
Name Functions
1. Main indicator Displays current values, parameters, and set values.
2. Opera-
tion indica-
tors
1 Lit when output 1 is ON.
2 Lit when output 2 is ON.
SV Lit when a set value is being displayed or changed.
Max Lit when the main indicator is showing the MAX value.
Min Lit when the main indicator is showing the MIN value.
T Lit when the teaching function is operable. Blinks while the teaching function is operating.
3. Level indicator Displays the current level that the K3MA-F is in. (See below for details.)
4. MAX/MIN Key Used to display the MAX and MIN values when a measurement value is being displayed.
5. Level Key Used to change the level.
6. Mode Key Used to allow the main indicator to indicate parameters sequentially.
7. Shift Key Used to enable a set value to be changed. When changing a set value, this key is used to move along the digits.
8. Up Key Used to change a set value. Used to set or clear a forced-zero function when a measurement value is being displayed.
Level indicator Level
pProtect
Not lit Operation
sInitial setting
fAdvanced-function setting
1
2
T
MAX/MIN LEVEL MODE SHIFT UP
Max
Min
SV
2. Operation indicators
3. Level indicator
4. MAX/MIN key
5. Level key 6. Mode key 7. Shift key
8. Up key
1. Main indicator

10 Frequency/Rate Meter K3MA-F
Dimensions
Application Examples
ABCDE
UPSHIFTMODELEVELMAX/MIN
101.2
91
85
97
12
1.3
96
48
80
44.8
45+0.5
0
92+0.5
0
Terminal cover
(provided) Main indicator
character size Panel cut-out
7.6 mm
14.2 mm
120 min.
75 min.
The K3MA-F uses M3 terminals.
A terminal cover is provided.
Displaying conveyor
belt feed speed
Monitoring the rotations
of a mixer or churner
Displaying the monitor
output from an inverter
as rotations or line speed
Gear Mixer or churner
K3MA-F
Inverter
Motor Voltage pulse
Note: If the monitor output from the inverter is analog,
such as 0 to 10 V, use the K3MA-J.
K3MA-F
K3MA-F m/min rpm
rpm
Proximity sensor
• Monitoring line speed for a reflow fur-
nace
• Displaying feed speed for food process-
ing, conveying, sintering
• Mixers for resin molding
• Powdering/pelleting machines, centrifu-
gal separators • Monitoring conveyor speed
• Machining equipment (grinders, polish-
ers)

Frequency/Rate Meter K3MA-F 11
Installation
1. Insert the K3MA-F into the panel cut-out hole.
2. For a waterproof installation, insert the rubber gasket onto the
body of the K3MA-F.
3. Fit the adaptor into the grooves on the left and right sides of the
rear case, then push it until it contacts the panel to secure the
K3MA-F.
■Wiring Precautions
•Use crimp terminals.
•Tighten the terminal screws to a torque of approximately 0.5 N⋅m.
•To avoid the influence of noise, route signal lines and power lines
separately.
■Wiring
•Use the following M3 crimp terminals.
■Unit Labels (Provided)
•The unit labels are not attached to the K3MA-F. Select the desired
labels from the provided sheet.
Note: For scales and gauges, use the unit labels that are specified by
the relevant laws or regulations.
5.8 mm max.
5.8 mm max.

12 Frequency/Rate Meter K3MA-F
Precautions
WARNING
Do not touch any of the terminals while the power is being sup-
plied. Doing so may result in electric shock.
!Caution
Do not disassemble the product or touch the internal components
of the product while the power is being supplied. Doing so may re-
sult in electric shock.
!Caution
Do not allow metal objects or wire cuttings to enter the product.
Doing so may result in electric shock, fire, or malfunction.
!Caution
Perform correct settings for the product according to the control
application. Failure to do so may cause unexpected operation, re-
sulting in damage to the product or injury.
!Caution
Take safety measures, such as installing a separate monitoring
system, to ensure safety even if the product fails. Product failure
may prevent comparative outputs from being generated, resulting
in serious accidents.
Observe the following precautions to ensure safety.
1. Maintain the power supply voltage within the range specified in
the specifications.
2. Maintain the load within the ratings specified in the specifications.
3. Check each terminal for correct number and polarity before con-
necting it. Incorrect or reverse connections may damage or burn
out internal components in the product.
4. Tighten the terminal screws securely. The recommended tighten-
ing torque is 0.43 to 0.58 N⋅m. Loose screws may cause fire or
malfunction.
5. Do not connect anything to unused terminals.
6. Provide a switch or circuit breaker so that operators can easily
turn OFF the power supply when necessary. Also provide appro-
priate indications of such devices.
7. Do not attempt to disassemble, repair, or modify the product.
8. Do not use the product where flammable or combustible gases
are present.
Application
General Precautions
1. Do not use the product in the following locations:
• Locations subject to direct radiant heat from heating equip-
ment.
• Locations subject to exposure to water, oil, or chemicals.
• Locations subject to direct sunlight.
• Locations subject to dust or corrosive gases (particularly sul-
furic gas or ammonia gas).
• Locations subject to severe changes in temperature.
• Locations subject to icing or condensation.
• Locations subject to shock or vibration.
2. Do not block heat dissipation around the product, i.e., provide suf-
ficient space for heat dissipation.
3. Ensure that the rated voltage is reached within two seconds after
the power is turned ON.
4. Conduct aging for 15 minutes min. after power is turned ON for
correct measurement.
5. Do not touch the slit sections or terminals while the power is
being supplied to prevent the product from being affected by static
electricity.
6. Do not lay heavy objects on the product during use or storage.
Doing so may deform or deteriorate the product.
7. Do not use paint thinner for cleaning. Use commercially available
alcohol.
Mounting
•Mount the product to a panel that is 1 to 8 mm thick.
•Install the product in a horizontal position.
•Use crimp terminals that match screw sizes.
Noise Prevention
•Install the product as far as possible from devices that generate
strong, high-frequency fields (such as high-frequency welders or
sewing machines) or surges.
•Install surge absorbers or noise filters on nearby devices that gen-
erate noise (particularly motors, transformers, solenoids, magnet
coils, and other devices that have a high inductance component).
•To prevent inductive noise, separate the terminal block wiring for
the product from high-voltage or high-current power lines. Do not
route the wiring for the product in parallel with or tie it in a bundle
with power lines.
•When using a noise filter for the power supply, check for the voltage
and current and install it as close as possible to the Frequency/
Rate Meter.
•Do not install the product near radios, television sets, or wireless
devices. Doing so may cause reception interference.
Increasing Service Life
•Do not use the product in locations where the temperature or
humidity exceeds the ratings or where condensation may occur.
When installing the product in a panel, be sure that the temperature
around the product (not the temperature around the panel) does
not exceed the ratings. The product service life depends on the
ambient temperature. The higher the ambient temperature, the
shorter the service life. To extend the product service life, lower the
temperature inside the Frequency/Rate Meter.
•Use and store the product within the temperature and humidity
ranges given in the specifications. When gang-mounting Fre-
quency/Rate Meters or arranging them vertically, heat generated by
the Frequency/Rate Meters will cause the internal temperature to
rise, reducing the service life. In such cases, consider forced cool-
ing methods, such as using a fan to circulate air around the Fre-
quency/Rate Meters. Do not, however, allow only the terminals to
be cooled. Doing so will increase measurement error.
•The life of the output relays is greatly affected by the switching
capacity and switching conditions. Use these relays within their
rated load and electrical life. The contacts may fuse or burn if they
are used past their electrical life.
+
−
Line filter
Power
supply
input Power
supply
input
Signal
input
Surge absorber
Frequency
/Rate
Meter
Frequency
/Rate
Meter

Frequency/Rate Meter K3MA-F 13
Operating Procedures
■Levels
“Level” refers to a grouping of parameters. The following table lists the operations that are possible in each of the levels, and the diagram tells how
to move between levels. There are some parameters that are not displayed for certain models.
Note: The move-to-protect-level time can be set in the advanced-function setting level.
Level name Function Measurement
Protect Setting lockouts. Continue
Operation Displaying current values, and setting OUT 1/2 set values. Continue
Initial setting Making initial settings of input type, scaling, output operating action,
and other parameters.
Stopped
Advanced-function setting Setting average processing, display color settings, and other ad-
vanced-function parameters.
Stopped
+
+
-1234.5
Power ON
Operation level
Initial setting level
Advanced-function
setting level
Time set
by user
(See note.) 1 s min.
1 s min.
1 s min.
1 s min.
Indicates change of level.
Continue to press the key for 2 s min.
Password "−0169"
Flashing stops if key
is released.
Protect level

14 Frequency/Rate Meter K3MA-F
■Parameters
−
−
−
−
−
−
For models with the
comparative output
function.
MODE
MODE
MODE
MODE
MODE
MODE
MODE
Set one of these.
Set one of these.
Current value
OUT1
value
OUT2
value
OUT1
upper-limit
value
OUT2
upper-limit
value
OUT1
lower-limit
value
OUT2
lower-limit
value
Power ON
Operation level
Note: 1. Some parameters are not displayed for certain models.
2. The K3MA-F will stop measurement if the level is changed to the initial setting level
or the advanced-function setting level.
3. If the input range is changed, some parameters are set to default values. Therefore,
set the input range first.
4. Settings displayed in reversed colors are defaults.

Frequency/Rate Meter K3MA-F 15
−
−
−
/
−
−
−
/
/
//
−−
−−
−−
/
−
Models
with the
compara-
tive output
function
Models
with the
compar-
ative
output
function
Pulse frequency
Scaling
Pulse
frequency
MODE MODE
MODE
MODE
MODE
MODE
MODE
MODE
MODE
MODE
MODE
MODE
MODE
MODE
MODE
MODE
Press Level
Key for
more than 3 s.
Press Level
Key for
less than 1 s.
Initial setting level Advanced-function
setting level
Enter
password
"−0169"
Press Level Key for less than 1 s.
Scaling
input
value
Scaling
display
value
Decimal
point
position
Move to
advanced-
function
setting level
OUT1 type
OUT2 type
Upper Limit
Lower Limit
Upper/Lower
Limits
Upper Limit
Lower Limit
Upper/Lower
Limits
Parameter
initialization
Average
processing
OUT1
hysteresis
OUT2
hysteresis
Auto-zero
time
Startup
compensation
time
Display
color
change
Display
auto-return
time
Move-to-
protect-
level time
Settings displayed in reversed colors are initial settings.
Unit: s
Unit: s
Unit: times
Comparative hysteresis
Green (red)
Red (green)
Red
Green

16 Frequency/Rate Meter K3MA-F
Operation/Adjustment Lockouts
Restricts key operations for operation level and adjustment level.
•Initial setting is 0.
•This is not displayed on models with no comparative output func-
tion.
Setting Level Lockouts
Restricts shifting to initial setting level or advanced-function setting
level.
Setting Change Lockout
Restricts setting changes by key operation. When this lockout is set,
it is no longer possible to shift to a setting change mode.
However, all protect level parameters can still be changed.
■Initial Settings
/ /
/ /
/
Operation level
Press Level Key + Mode Key for more than 1 s.
Press Level Key + Mode Key for more
than preset time.
Protect level
MODE
MODE
MODE
Operation/adjustment
lockouts
Setting level lockouts
Setting change lockout
Parameter Setting Operation level
Current value
display
Set value
display
oapt 0Allowed Allowed
1Allowed Allowed
2Allowed Prohibited
Parameter Setting Shift to initial
setting level
Shift to
advanced-
function
setting level
icpt 0 Allowed Allowed
1Allowed Prohibited
2Prohibited Prohibited
Parameter Setting Setting change by key
operation
wtpt off Allowed
on Prohibited
Select the pulse frequency for measurement.
Set the scaling values and OUT type as required.
Press the Level Key for 3 s min. to move to the initial setting
level.
Press the Level Key for less than 1 s min. to return to the
operation level.
If required, shift to the advanced-function setting level to set
the number of measurements for average processing,
hysteresis values, auto-zero time, startup compensation time,
display color change, display auto-return time, or move-to-
protect-level time.
Power ON
Measurement starts.
Specify set value of OUT 1 and 2.

Frequency/Rate Meter K3MA-F 17
■Setting Example
Initial Settings
The settings for the following example are shown here.
Example: Display conveyor belt feed speed
Here, the conveyor belt feed speed is to be displayed in units of 0.1
m/min.
•Proximity Sensor: E2E-X5E1, NPN output
When displaying a flowrate (e.g., in l/min or l/h), make the scaling
settings after confirming the I/O characteristics of the flowrate sen-
sor. There are flowrate sensors that output analog signals. If this kind
of flowrate sensor is used, consider using the K3MA-J.
1. Select the maximum input frequency for the K3MA-F.
Set the pulse frequency selection to either 30 Hz or 5 kHz. In the
example, this is set to 30 Hz because the conveyor belt is turning
at a slow speed.
Parameter: p-fre (pulse frequency), Setting value: 30
2. Set the scaling. The relationship between the display value and
the input value is shown in the following equation.
Rotations (rpm) = Frequency input/No. of pulses
per rotation ×60
Cycle speed D (m/min) = Rotations ×roll circumference
=1/N
×f ×60 ×d ×π
N: No. of pulses per rotation
f: Frequency (Hz)
d: Roller diameter (m)
When the input conditions are applied to this equation, we obtain
the following:
Display value = 1/1 ×f ×60 ×0.1 ×π
For an input of 1 Hz, the display value is 18.8495 (m/min).
The scaling settings for the K3MA-F must be integers. Also, to
decrease error, the scaling value is multiplied by 1,000, to obtain
an input of 1000 Hz and a display value of 18850. However,
because the display value in this case is displayed to the first dec-
imal place, the scaling is set as shown in the following example so
that 18850 is displayed for an input of 100 Hz.
Parameter Setting value
inp (scaling input value) 100
dsp (scaling display value) 18850
dp (decimal point position) %%%%.%
Note: The decimal point position here refers to the position in the
number after scaling. When setting the scaling display value, it
is necessary to consider the number of digits to be displayed
past the decimal point.
■Troubleshooting
When an error occurs, error details will be displayed on the main indicator. Confirm the error from the main indicator and take the appropriate coun-
termeasures.
1
2
E2E-X5E1
Proximity Sensor
K3MA-F-A2 100-240VAC
0.1 m
MAX/MIN LEVEL MODE SHIFT UP
Max
Min
SV
dps
18850
inp
100
1 pulse/rotation, roller diameter 0.1 m
Display value
Input value
Level
display
Main indicator Error contents Countermeasures
Not lit e111 RAM memory error Repair is necessary.
Consult your OMRON sales representative.
5e111 EEPROM memory error When this error is displayed, press the Level Key for 3 sec-
onds, and the settings will be restored to the factory set-
tings.
If the error cannot be recovered, repair is necessary. Con-
sult your OMRON sales representative.
Not lit Flashes 99999 The scaling display value exceeds 99999. Promptly change the input to a value that falls within the
specified range.
The scaling value may be inappropriate. Review the scal-
ing value at the initial setting level.
Not lit Flashes -19999 The scaling display value is lower than −19999. Promptly change the input to a value that falls within the
specified range.
The scaling value may be inappropriate. Review the scal-
ing value at the initial setting level.

18 Frequency/Rate Meter K3MA-F
Warranty and Limitations of Liability
■WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if
specified) from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY,
OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER
ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DIS-
CLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
■LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS, OR COMMER-
CIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLI-
GENCE, OR STRICT LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS
OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT
SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
Application Considerations
■SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the custom-
er's application or use of the products.
At the customer's request, OMRON will provide applicable third party certification documents identifying ratings and limitations of use that apply
to the products. This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the end
product, machine, system, or other application or use.
The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all
possible uses of the products, nor is it intended to imply that the uses listed may be suitable for the products.
•Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog.
•Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles,
safety equipment, and installations subject to separate industry or government regulations.
•Systems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE
SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED
AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

Frequency/Rate Meter K3MA-F 19

20
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. N107-E1-03A
OMRON Corporation
Industrial Automation Company
Industrial Devices and Components Division
H.Q.
Measuring Components Department
Shiokoji Horikawa, Shimogyo-ku,
Kyoto, 600-8530 Japan
Tel: [phone]/Fax: [phone]
Printed in Japan
0204-0.5M (1001) (A)