Omron K3MA-L User manual

1
K3MA-LTemperature Meter
Highly Visible LCD Display with 2-color
(Red and Green) LEDs
■Wide input range - select from two types of plati-
num-resistance thermometers and ten types of
thermocouples.
■Front-panel key operation for easy setting.
■Average processing function suppresses flicker.
■Temperature input shift and temperature unit
selection functions.
■Easy confirmation of max/min display.
■Short 80-mm depth (measured from edge of face
plate).
■Finger protective cover (standard equipment) pro-
tects 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
with CE marking.
Ordering Information
Model Number Legend:
1. Input Type
L: Platinum-resistance thermometer or thermocouple
2. Output Type
None: No output
C: With relay contact output (SPDT)
3. Supply Voltage
100-240VAC: 100 to 240 VAC
24VAC/VDC: 24 VAC/VDC
CUS
Input type Supply voltage Output Model
Platinum-resistance thermometer or
thermocouple 100 to 240 VAC None K3MA-L 100-240VAC
1 relay contact output (SPDT) K3MA-L-C 100-240VAC
24 VAC/VDC None K3MA-L 24VAC/VDC
1 relay contact output (SPDT) K3MA-L-C 24VAC/VDC
K3MA-L-@
1 2 3

2
K3MA-LK3MA-L
Specifications
■Ratings
Input/Output Ratings
Relay Contact Output
K3MA-L 100-240VAC, K3MA-L-C 100-240VAC K3MA-L 24VAC/VDC, K3MA-L-C 24VAC/VDC
Supply voltage 100 to 240 VAC 24 VAC (50/60 Hz), 24 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 M
W min. (at 500 VDC) between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Dielectric withstand voltage 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
common mode.
 1 m s, 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 m s, 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)
Ambient humidity Operating: 25% to 85% (with no condensation)
Ambient atmosphere Must be free of corrosive gas.
Approved safety standards UL3121, 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
Item Resistive load (cos f = 1) Inductive load (cos f = 0.4, L/R = 7 ms)
Rated load 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 400 VAC, 150 VDC
Max. contact current 5 A (at COM terminal)
Max. switching capacity 2,000 VA, 192 W 375 VA, 36 W
Min. permissible load
(P level, reference value) 10 mA at 5 VDC
Mechanical life 20,000,000 times min. (at a switching frequency of 1,200 time/min)
Electrical life
(at an ambient temperature of 20
 C) 100,000 times min. (at a rated load switching frequency of 10 time/min)

3
K3MA-LK3MA-L
■Measuring Ranges
Platinum-resistance Thermometer
Thermocouple
■Characteristics
Note: The indication accuracy of the K thermocouple at a temperature of - 200 to 1300  C is  2  C  1 digit maximum.
The indication accuracy of the T and N thermocouples at a temperature of
- 100  C or less is  2  C  1 digit maximum.
The indicator accuracy of the U and L thermocouples at any temperature is
 2  C  1 digit maximum.
The indication accuracy of the B thermocouple at a temperature of 400
 C or less is unrestricted.
The indication accuracy of the R and S thermocouples at a temperature of 200
 C or less is  3  C  1 digit maximum.
Input Pt100 JPt100
Range
 C - 200 to 850 - 199.9 to 500.0 0.0 to 100.0 - 199.9 to 500.0 0.0 to 100.0
 F - 300 to 1500 - 199.9 to 900.0 0.0 to 210.0 - 199.9 to 900.0 0.0 to 210.0
Parameter

Input K J T E L U N R S B
Range
 C - 200
to
1300
- 20.0
to
500.0
- 100
to
850
- 20.0
to
400.0
- 200
to
400
- 199.9
to
400.0
0
to
600
- 100
to
850
- 200
to
400
- 199.9
to
400.0
- 200
to
1300
0
to
1700
0
to
1700
100
to
1800
 F - 300
to
2300
0.0
to
900.0
- 100
to
1500
0.0
to
750
- 300
to
700
- 199.9
to
700.0
0
to
1100
- 100
to
1500
- 300
to
700
- 199.9
to
700.0
- 300
to
2300
0
to
3000
0
to
3000
300
to
3200
Parameter
     
Indication accuracy (at 23  5  C)
(See note.) Thermocouple: (
 0.5% of indication value or  1  C, whichever greater)  1 digit max.
Platinum-resistance thermometer:
(
 0.5% of indication value or  1  C, whichever greater)  1 digit max.
Input Thermocouple: K, J, T, E, L, U, N, R, S, B
Platinum-resistance thermometer: JPt100, Pt100
Measurement method Double integral method
Sampling period 500 ms
Display refresh period Sampling period (sampling times multiplied by number of averaging times if average processing
is selected.)
Max. displayed digits 4 digits (
- 1999 to 9999)
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.
Input shift Input shift equivalent to the setting value supported for all points within the sensor measurement
range.
Hold function Max hold (maximum value), Min hold (minimum value)
Hysteresis setting Programmable with front-panel key inputs (0001 to 9999).
Other functions Display color change (green (red), green, red (green), red)
Average processing (simple average OFF/2/4/8 operations)
Setting change lockout
Parameter initialization
Output Relay contact (SPDT)
Delay in comparative outputs 1 s max.
Enclosure ratings 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)

4
K3MA-LK3MA-L
Nomenclature
Name Functions
1. Main indicator Displays current values, parameters, and set values.
2. Opera-
tion indi-
cators
1 Lit when output 1 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.
3. Level indicator Displays the current level that the K3MA-L 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 dis-
played.
Level indicator Level
/Protect
Not lit Operation
Adjustment
2Initial setting
%Advanced-function setting
MAX/MIN LEVEL SHIFTMODE UP
1
SV
Max
Min
2. Operation indicators
1. Main indicator
8. Up key
6. Mode key 7. Shift key
5. Level key
4. MAX/MIN key
3. Level indicator

5
K3MA-LK3MA-L
Operation
■Main Functions
Input Types and Ranges
Note: The initial value is “  thermocouple K ( - 200 to 1300  C/ - 300 to 2300  F).”
Temperature Unit Selection
Either centigrade (  C) or fahrenheit (  F) can be selected as the
temperature unit.
OUT Types (Comparative Output Models Only)
OUT 1 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 the upper-limit set value or less than the lower-limit set val-
ue.
Parameter Setting Input type Meaning
(-3  Platinum-resistance
thermometer Pt100
- 200 to 850  C - 300 to 1500  F
 - 199.9 to 500.0  C - 1999 to 900.0  F
 0.0 to 100.0  C 0.0 to 210.0  F
 JPt100 - 199.9 to 500.0  C - 199.9 to 900.0  F
 0.0 to 100.0  C 0.0 to 210.0  F
 Thermocouple K - 200 to 1300  C - 300 to 2300  F
 - 20.0 to 500.0  C 0.0 to 900.0  F
 J - 100 to 850  C - 100 to 1500  F
 - 20.0 to 400.0  C 0.0 to 750.0  F
 T - 200 to 400  C - 300 to 700  F
 - 199.9 to 400.0  C - 199.9 to 700.0  F
 E 0 to 600  C 0 to 1100  F
 L - 100 to 850  C - 100 to 1500  F
 U - 200 to 400  C - 300 to 700  F
 - 199.9 to 400.0  C - 199.9 to 700.0  F
 N - 200 to 1300  C - 300 to 2300  F
 R 0 to 1700  C 0 to 3000  F
 S 0 to 1700  C 0 to 3000  F
 B 100 to 1800  C 300 to 3200  F
Parameter Setting Meaning
#4 " Display in  C.
% Display in  F. Parameter Setting Meaning
.433 '( Upper limit: Alarm
operates at upper
limit.
+. Lower limit: Alarm
operates at lower
limit.
'(+. Upper and lower
limits: Alarm oper-
ates at upper and
lower limits.
ON
OFF
ON
OFF
ON
OFF
Upper Limit (High Acting) Lower Limit (Low Acting) Upper and Lower Limits
(Outside Band Acting)
Hysteresis
Hysteresis
Hysteresis
OUT1 value
Measurement
value
Output
Measurement
value
OUT1 value
Output
OUT1 upper-limit
value
Measurement
value
OUT1lower-limit
value
Output
Hysteresis

6
K3MA-LK3MA-L
Temperature Input Shift
Input shift equivalent to the setting value supported for all points
within the sensor measurement range.
Parameter Initialization
This function returns all of the parameters to their initial values.
Use this to reset the K3MA-L after returning it to its factory-set
condition.
Average Processing
Average processing stabilizes displayed values to minimize flicker
by averaging the fluctuating input signals. Average processing
can be performed for the measurement values in either of four
steps (OFF, 2 times, 4 times, or 8 times).
This is useful for ignoring rapid fluctuations, e.g., eliminating spike
noise.
Hysteresis (Comparative Output Models Only)
The hysteresis of comparative outputs can be set to prevent chat-
tering in the output when the measurement value fluctuates finely
near the OUT value.
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 display 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 measur-
ing the maximum value.
Parameter Setting
(-2  to 
Parameter Setting Meaning
(-(3 .%% ---
.- Initializes all param-
eters.
Temperature
Before shift
Temperature input
shift value
After shift
Input
Upper limit (high acting)
Set value
Output ON
OFF
Hysteresis
Measurement value
192.0
258.9
OUT1 value Green
Red
MAX/MIN LEVEL SHIFTMODE UP
MAX/MIN
MAX/MIN
MAX/MIN
MAX/MIN
Max
LEVEL SHIFTMODE UP
MAX/MIN
Min
LEVEL SHIFTMODE UP
Current value
MAX value
MIN value

7
K3MA-LK3MA-L
■External Connections
Terminal Arrangement
Output
terminals
Input
terminals
Power
supply
E1
E2
A1
A2
E3
E4
E5
E6
+
−
E4
E5
E6
A
B
B
Models with
comparative
output
For platinum-
resistance
thermometer input
For thermocouple
input
100- to 240-VAC type or
24-VAC/VDC type
(No polarity for 24-VDC
connection.)
Terminal No. Name Description
Operation power Connects the operation power supply.
Thermocouple or platinum-resistance ther-
mometer input Connects the thermocouple or platinum-re- sistance thermometer input.
Outputs Outputs the relay outputs.
A1 A2
-
E6 E5
-
E4 -
E2 E3
-
E1 ,

8
K3MA-LK3MA-L
■Block Diagram
Note:Relay output models only.
X
EEPROM
5 V 12 V
Input Input
Micro-
computer
Key
Display
Output circuit
Constant voltage circuit
Power supply circuit
Contact
output (See
note.)

9
K3MA-LK3MA-L
■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 value. Continue
Adjustment Setting communications writing control. Continue
Initial setting Making initial settings of input type, output operating action, and
other parameters. Stopped
Advanced-function setting Setting average processing, display color settings, and other ad-
vanced function parameters. Stopped
Protect level
Operation level
Power ON
+
Time set
by user
1 s min. - 123.4
Flashing stops if key
is released.
1 s min.
Initial setting level
Password "−169"
1 s min.
Advanced-function
setting level
Continue to press the key for 2 s min.
Indicates change of level.
1 s min.
(See note.)
Adjustment level
Less than 1 s
+

10
K3MA-LK3MA-L
■Parameters
Operation level
Set one of these.
Current value
OUT1
value
OUT1
upper-limit
value
OUT1
lower-limit
value
Note: 1. Some parameters are not displayed for certain models.
2. The K3MA-L 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 initial settings.
Power ON
∼
∼
∼
∼∼
0
Adjustment level
Press Level Key
Press Level Key
for less than 1 s.
for less than 1 s.
Temperature input shift
For models with the
comparative output function
MODE
MODE
MODE
MODE