OMRON K3MA-L User Manual

Highly Visible LCD Display with 2-color
(Red and Green) LEDs

■ Wide input range - se lect from two types o f 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 8 0-mm depth (me asured from e dge of face

plate).

■ Finger protective cover (standard equi pme nt) p ro -

tects against electric shock.

■ Water- and dust-proof NEMA4X (IP66 equivalent)

front panel.

■ Recognized to U.S. and Canadian requirements

under the Component Reco gnitio n Pr ogram of UL
with CE marking.

K3MA-L Temperature Meter

CUS

Ordering Information

Input type Supply voltage Output Model

Platinum-resistance thermometer or
thermocouple

Model Number Legend:

K3MA-L-@

1 2 3

1. Input T y pe

L: Platinum-resistance thermometer or thermocouple

2. Output Ty pe

None: No output
C: With relay contact output (SPDT)

3. Supply Voltage

100-240VAC: 100 to 240 VAC
24VAC/VDC: 24 VAC/VDC

100 to 240 VAC None K3MA-L 100-240VAC

24 VAC/VDC None K3MA-L 24VAC/VDC

1 relay contact output (SPDT) K3MA-L-C 100-240VAC

1 relay contact output (SPDT) K3MA-L-C 24VAC/VDC

1

Specifications

■ Ratings

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)
Insulation resistance 20 M

Dielectric withstand voltage 2,000 VAC for 1 min between external terminal and case.

Noise immunity

Vibration resistance

Shock resistance
Ambient temperature Operating:

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)

EMC (EMI) EN61326+A1 Industry

Weight Approx. 200 g

6 VA max. 4.5 VA max. (24 VAC)

W

min. (at 500 VDC) between external terminal and case.

Insulation provided between inputs, outputs, and power supply.

Insulation provided between inputs, outputs, and power supply.



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.

2

Vibration: 10 to 55 Hz, Acceleration: 50 m/s
5 min each in X, Y, and Z directions for 10 sweeps.

2

150 m/s

Storage:

Conforms to VDE0106/P100 (finger protection)

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

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)
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 m/s2 for relay contact outputs) 3 times each on 3 axes, 6 directions.

-10

C to 55C (with no condensation or icing)

-25

C to 65C (with no condensation or icing)

4.5 W max. (24 VDC)



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.

8-kV air discharge

2-kV line to ground (power line)

,

100% (rated voltage)

K3MA-LK3MA-L

Input/Output Ratings

Relay Contact Output

Item Resistive load (cosf = 1) Inductive load (cosf = 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)
Mechanical life 20,000,000 times min. (at a switching frequency of 1,200 time/min)
Electrical life

(at an ambient temperature of 20

10 mA at 5 VDC

100,000 times min. (at a rated load switching frequency of 10 time/min)



C)

2

■ Measuring Ranges

Platinum-resistance Thermometer

Input Pt100 JPt100



Range

Parameter

C



F

-

200 to 850

-

300 to 1500



-

199.9 to 500.0 0.0 to 100.0

-

199.9 to 900.0 0.0 to 210.0

-

199.9 to 500.0 0.0 to 100.0

-

199.9 to 900.0 0.0 to 210.0

Thermocouple

Input K J T E L U N R S B

Range

C-

200

-

to
1300

F-

300
to
2300

Parameter

■ Characteristics

     

20.0

to

500.0

0.0
to

900.0

-

100
to
850

-

100
to
1500

-

20.0

to

400.0

0.0
to
750

-

200
to
400

-

300
to
700

-

199.9

to

400.0

-

199.9

to

700.0

0
to
600

0
to
1100

-

100
to
850

-

100
to
1500

-

200
to
400

-

300
to
700

-

199.9

to

400.0

-

199.9

to

700.0

-

200
to
1300

-

300
to
2300

0
to
1700

0
to
3000

0
to
1700

0
to
3000

K3MA-LK3MA-L

100
to
1800

300
to
3200

Indication accuracy (at 235C)
(See note.)

Input Thermocouple: K, J, T, E, L, U, N, R, S, B

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

Max. displayed digits 4 digits (
Display 7-segment digital display, Character height: 14.2 mm
Polarity display “
Zero displa y Leading zeros are not displayed.
Input shift Input shift equivalent to the setting value supported for all points within the sensor measurement

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)

Output Relay contact (SPDT)
Delay in comparative outputs 1 s max.
Enclosure ratings Front panel: NEMA 4X for indoor use (equivalent to IP66)

Memory protection Non-volatile memory (EEPROM) (possible to rewrite 100,000 times)

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.

Platinum-resistance thermometer: JPt100, Pt100

is selected.)

-

1999 to 9999)

-

” is displayed automatically with a negative input signal.

range.

Average processing (simple average OFF/2/4/8 operations)
Setting change lockout
Parameter initialization

Rear case: IEC standard IP20
Terminals: IEC standard IP0 0 + finger protection (VDE0106/100)

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
The indicator accuracy of the U and L thermocouples at any temperature is
The indication accuracy of the B thermocouple at a temperature of 400
The indication accuracy of the R and S thermocouples at a temperature of 200

-

100C or less is 2C 1 digit maximum.

2C 



C or less is unrestricted.

1 digit maximum.



C or less is 3C 1 digit maximum.

3

K3MA-LK3MA-L

Nomenclature

2. Operation indicators

1

Max

Min

3. Level indicator

4. MAX/MIN key

Name Functions

1. Main indicator Displays current values, parameters, and set values.

2. Opera­tion indi­cators

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-

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.

played.

SV

MAX/MIN LEVEL SHIFTMODE UP

5. Level key

6. Mode key

7. Shift key

1. Main indicator

8. Up key

Level indicator Level

/

Not lit Operation

2
%

Protect

Adjustment
Initial setting
Advanced-function setting

4

Operation

■ Main Functions

Input Types and Ranges

Parameter Setting Input type Meaning

(-3 




















Platinum-resistance
thermometer

Thermocouple K

Pt100

-

-

0.0 to 100.0C 0.0 to 210.0F

JPt100

-

0.0 to 100.0C 0.0 to 210.0F

-

-

J

-

-

T

-

-

E 0 to 600C 0 to 1100F
L
U

-

-

-

N

-

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

K3MA-LK3MA-L

200 to 850C

199.9 to 500.0C

199.9 to 500.0C

200 to 1300C

20.0 to 500.0C 0.0 to 900.0F
100 to 850C

20.0 to 400.0C 0.0 to 750.0F
200 to 400C

199.9 to 400.0C

100 to 850C
200 to 400C

199.9 to 400.0C
200 to 1300C

-

300 to 1500F

-

1999 to 900.0F

-

199.9 to 900.0F

-

300 to 2300F

-

100 to 1500F

-

300 to 700F

-

199.9 to 700.0F

-

100 to 1500F

-

300 to 700F

-

199.9 to 700.0F

-

300 to 2300F

Note: The initial value is “

Temperature Unit Selection

Either centigrade (C) or fahrenheit (F) can be selected as the
temperature unit.

Parameter Setting Meaning

#4 "

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



thermocouple K (-200 to 1300C/-300 to 2300F).”

Display in C.

%

Display in F.

• 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 val­ue.

Parameter Setting Meaning

.433 '(

Upper limit: Alarm
operates at upper
limit.

+.

Lower limit: Alarm
operates at lower
limit.

'(+.

Upper and lower
limits: Alarm oper­ates at upper and
lower limits.

than its set value.

Upper Limit (High Acting) Lower Limit (Low Acting) Upper and Lower Limits

(Outside Band Acting)

OUT1 value

Measurement
value

Output

ON

OFF

Hysteresis

Measurement
value

OUT1 value

Output

Hysteresis

ON

OFF

OUT1 upper-limit
value
Measurement
value

OUT1 lower-limit
value

Output

Hysteresis

ON

OFF

Hysteresis

5