Digital Panel Meter
K3TF
Easy-to-use, Low-cost Digital Panel Meter
that Accepts AC Input
• Compact DIN-size (96 x 48 (W x H)) body.
• Mounting thickness of only 3.5 mm required.
• Highly visible display with 14.2-mm-high LEDs.
• Detects and displays root-mean-square value of half-wave rec-
tified current.
• Confirms to EMC standards EN61010-1 (IEC61010-1).
Model Number Structure
■
Model Number Legend
K3TF -
1
2
3
4
1, 2. Input Code
V5: 0 to 199.9 mV
V6: 0 to 1.999 V
V7: 0 to 19.99 V
V8: 0 to 199.9 V
V9: 0 to 400 V
A6: 0 to 1.999 mA
A7: 0 to 19.99 mA
A8: 0 to 199.9 mA
A9: 0 to 1.999 A
3. Series No.
1: Current series
4. Supply Voltage
4: 100 to 120 VAC
5: 200 to 240 VAC
Ordering Information
■
List of Models
Models with Line Monitor
Range
AC voltage
Measuring ranges
0 to 199.9 V
0 to 400 V
K3TF-V814
K3TF-V914
Supply voltage
100 to 120 VAC
200 to 240 VAC
K3TF-V815
K3TF-V915
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1
K3TF
Specifications
■
Ratings
Supply voltage
Operating voltage range
Power consumption
Insulation resistance
Dielectric strength
Noise immunity
Vibration resistance
Shock resistance
Ambient temperature
Ambient humidity
Ambient operating atmosphere
EMC
100 to 120 VAC (50/60 Hz); 200 to 240 VAC (50/60 Hz)
−15%
to +10% of supply voltage
4 VA (at max. load)
10 MΩ min. (at 500 VDC) between external terminal and case
2,000 VAC min. for 1 min between input terminal and power supply
2,000 VAC min. for 1 min between external terminal and case
±1,500
V on power supply terminals in normal or common mode
Malfunction: 10 to 55 Hz, 0.5-mm single amplitude for 10 min each in X, Y, and Z directions
Destruction: 10 to 55 Hz, 0.75-mm single amplitude for 2 hrs each in X, Y, and Z directions
Malfunction: 98 m/s
2
for 3 times each in 6 directions
Destruction: 294 m/s
2
for 3 times each in 6 directions
Operating:
−10°
to 55°C (with no icing)
Storage:
−20°
to 65°C (with no icing)
Operating: 35% to 85% (with no condensation)
No corrosive gas
EN61326+A1
Industry
CISPR 11 Group 1 class A: CISRP16-1/-2
CISPR 11 Group 1 class A: CISRP16-1/-2
EN61326+A1
Industry
EN61000-4-2:
4 kV contact discharge (level 2)
8 kV air discharge (level 3)
Immunity RF-interference:
EN61000-4-3:
10 V/m (amplitude-modulated,
80 MHz to 1 GHz) (level 3)
Immunity Fast Transient Noise: EN61000-4-4:
2 kV (power line) (level 3)
Immunity Burst Noise:
1 kV line to line (I/O signal line)
Immunity Surge:
EN61000-4-5:
1 kV line to line
2 kV line to ground (power line)
Immunity Conducted Disturbance EN61000-4-6:
3 V (0.15 to 80 MHz) (level 2)
Immunity Voltage Dip/Interrupting EN61000-4-11:
0.5 cycles, 0, 180°, 100% (rated voltage)
Conforms to EN61326+A1, EN61010-1 (IEC61010-1)
Conforms to VDE0106/P100 (finger protection) when the terminal cover is mounted.
(EMI)
Emission Enclosure:
Emission AC Mains:
(EMS)
Immunity ESD:
Approved standard
Note:
The K3TF-V8@@ and K3TF-V9@@ do not conform to CE marking standards.
■
Characteristics
Input signal
A/D conversion method
Root-mean-square value indication
Sampling period
Display refresh period
Max. displayed digits
Display
Decimal point display position
Overflow display
Zero suppression
External control
Degree of protection
AC voltage/current
Double integral method
Root-mean-square value of half-wave rectified current detected
2.5 times/s
2.5 times/s
3 1/2 digits (1999)
7-segment red LED
Selected with slide switch (see note 1)
Overflow:
1@@@
Not supported.
Process value hold (terminals on rear panel short-circuited)
Front panel: IEC IP51 (see note 2)
Case:
IEC IP20
Terminals: IEC IP00
Note: 1.
Only for models with signal monitor.
2.
IP51 is maintained when the water-resistive soft cover and bracket are used. IP50 will be, however, maintained without these water-re-
sistive accessories.
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3
K3TF
■
Measuring Ranges
Monitor
Line monitor
Input range
AC voltage
Measuring range
0 to 199.9 V
0 to 400 V
Signal
monitor
AC voltage
0 to 199.9 mV
0 to 1.999 V
0 to 19.99 V
AC current
0 to 1.999 mA
0 to 19.99 mA
0 to 199.9 mA
0 to 1.999 A
Max. resolution
100 mV
1V
100
μV
1 mV
10 mV
1
μA
10
μA
100
μA
1 mA
Input impedance
10 MΩ
10 MΩ
10 MΩ
10 MΩ
1 MΩ
100
Ω
10
Ω
1
Ω
0.1
Ω
Accuracy
±0.3%rdg ±1
digit
(see note 1)
±0.3%rdg ±1
digit
±0.3%rdg ±1
digit
±0.3%rdg ±1
digit
±0.3%rdg ±1
digit
±0.5%rdg ±1
digit
±0.5%rdg ±1
digit
±0.5%rdg ±1
digit
±0.5%rdg ±1
digit
Max. permissible
load
500 V
500 V
250 V
250 V
250 V
50 mA
150 mA
500 mA
3A
Note: 1.
With 100% input.
±0.3%
FS±1 digit when the input is less than 35% FS.
2.
The above accuracy is at an input frequency range of 40 Hz to 1 kHz and an ambient temperature of 23±5°C.
Connections
■
External Connections
1
2
3
4
5
6
7
8
9
AC signal input
GND
HOLD
Unused
AC power supply
Note:
Terminals 2 and 3 of the models are not internally insulated. Connect a relay with high
contact reliability and insulation (with a minimum load current of 0.3 mA) or a
photocoupler with high insulation (with a residual voltage of 1 V max. and a current
leakage of 0.1 mA max.) to these terminals for external control.
Nomenclature
Display
Unit name
Select the decimal position with the slide
switch under the cover on the front panel
(signal monitor only).
Remove the front panel by using a flat-blade
screwdriver or your fingernail in the two
notches at the bottom.
Note:
The decimal position cannot be
changed for the K3TF-V81@ or
K3TF-V91@.
10
3
10
2
10
1
No decimal point
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4
K3TF
Dimensions
Note:
All units are in millimeters unless otherwise indicated.
Panel Cutouts
92
+0.8
−0
98
92
45
+0.6
−0
75 min.
120 min.
Note:
The values above are recommended
values. Do not group-mount the meters
at intervals less than the
recommended ones.
48
43
LED Indicator Size
14.2 mm
96
3.5
66
The K3TF uses M3.5 terminals.
7.8 mm
Application Examples
High AC Voltage Measurement
When voltage exceeding the maximum voltage in the standard
range is measured (for example: more than 400 V), a divider or
potential transformer (PT) is connected externally.
Large AC Current Measurement
When AC current exceeding 2 A is measured, a
current transformer (CT) is connected externally.
Hi
Hi
Digital
panel
meter
Lo
PT
Hi
Hi
Digital
panel
meter
Lo
CT
Input
Input
Lo
Lo
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