SMC Networks PFMC Series User manual

 Peak/Bottom value
 Line name
 Accumulated value
Instantaneous
flow rate
(Main screen)
Set value
(Sub screen)
Expanded flow range
3-color/ 2-screen display∗
∗2-row display of main screen and sub screen
1 2 5 10 20 25 50 100 150 200 300 500 600 1000 2000
2000 L type
Rated flow range [L/min]
20 2000
2000 L type
10 0 :1
∗Rated flow ratio is 10 : 1 for current PF2A.
Current PF2A: 5 L/min
1L/min
Wide range of flow measurement with one product Compared with the current PF2A,
IP65
Compact, Space saving
Flow ratio∗
78
% reduction
Weight
74
% reduction
Setting resolution
10 1000
1000 L type
5 500
500 L type
Mounting
space
1100 g a240 g Compared with
PFMC7202-06 and
PF2A703H-10
90
160
35
55
70
mm
shorter
20
mm
shorter
66.1
25.9
mm
shorter
92
PFMC7202
PF2A
Series
(Current
model)
PFMC Series
3-Color Display
275
Digital Flow Switch
Applicable fluid Dry air, N2
RoHS
®
PFM
PFMV
PFMB
PFMC
PF2A
PF3W
PF2D
LFE
IF
PFMC
A

Protruding
part
Moist air
Sensor
unit
3-Color Display Digital Flow Switch PFMC Series
Can be selected from 50 msec. (0.05 sec.)/ 0.1 sec./ 0.5 sec./ 1.0 sec./ 2 .0 sec.
Response time can be set depending on application.
Response time
Rotary displayRotary display
Bypass structure
Output operation
Display color
Reference condition
Setting of response time
Display mode

Selection of display on sub screen
External input function
Accumulated value hold
Forced output function

Analog output free range function

Selection of display OFF mode
Peak/Bottom value display
Keylock function

Error display function

Orientation correction
function
(sRefer to pages 285 and 286 for details.)
Bypass structure with protruding
part at the main piping,
reduces the contact of moist
air with the sensor, reducing
degradation of the sensor and
maintaining accuracy.
FunctionsFunctions
Compressed air line
Air dryer
IDF/IDU AF AR AMD/AFD PFMC
Air filter Regulator Micro mist separator Flow switch
Example of
recommended
pneumatic circuit
Grease-free
 Accumulated indication shows the
operating flow rate or residual amount
(of N2etc.) in a gas cylinder.
 Flow control of equipment,
main line and branch line
Applications
Remote control is possible with
accumulated pulse.
Display can be rotated in
increments of 45°to suit the
installation conditions.
Easy operation,
improved visibility.
Counterclockwise
90°
Clockwise 225°
Digital flow switch to save energy!Digital flow switch to save energy!
Flow control is necessary for promoting energy saving in any application.
Saving energy starts from numerical control of the flow consumption of equipment
and lines and clarification of the purpose and effect.
Flow control is necessary for promoting energy saving in any application.
Saving energy starts from numerical control of the flow consumption of equipment
and lines and clarification of the purpose and effect.
Digital display allows visualization.
3-color/2-screen display,
Improved visibility
Remote control is possible with
accumulated pulse.
Note) The product is not designed to be explosion proof.
 Flow control of the air for spray painting
IN OUT
OUT IN
OUT
IN
0°(No rotation)
Counterclockwise
90°
Clockwise
225°
Counterclockwise
90°Clockwise 180°
Installation example
Multi-counter CEU5
Details
276
B

Series
12 0.2 0.5 5 10 20 25 50 100 150 200 300 500 600 1000 2000 3000 6000 12000
Rated flow range [L/min]
0.5 25
1 50
2100
2200
5500
10 1000
110
5 50
10 100
20 200
50 500
150 3000
300 6000
600
12000
0.2
10
−0.5 0.5
Series
Minimum
setting unit
Detection
method
Applicable
fluid
Minimum
setting unit
Detection
method
Applicable
fluid
Thermal
type
(MEMS)
Thermal
type
(MEMS)
Air
N2
Air
N2
Argon
CO2
Dry air
N2
0.1 L/min
0.5 L/min
1 L/min
2 L/min
5 L/min
5 L/min
10 L/min
Thermal
type
(MEMS)
Bypass
flow type
Thermal
type
(Thermistor)
Air
N2
0.1 L/min
0.01 L/min
1 L/min
Dry air
N2
Thermal
type
(MEMS)
Bypass
flow type
1 L/min
1 2 3−3 −2 −1 −0.5 0 0.5
Rated flow range [L/min]
PFMV
PFM
PF2A
PFMB
PFMC
−1
−3
1
20 2000
5 500
10 1000
20 2000
0 1
0 3
3
0 0.5
Flow Switch Flow Rate Variations
277
PFM
PFMV
PFMB
PFMC
PF2A
PF3W
PF2D
LFE
IF
PFMC

PFM PF2A
Air, N2, Ar, CO2
Digital DigitalDigital
IP40 IP40
2-color LED display
2-color
LED display
2-color
LCD display
NPN/PNP open collector
Accumulated pulse output
Analog voltage output
Analog current output
NPN/PNP open collector
Accumulated pulse output
Analog voltage output
Analog current output
Hysteresis mode:
Variable
Window comparator mode:
Variable
Hysteresis mode:
Variable
Window comparator mode:
Variable
Hysteresis mode:
Variable
Window comparator mode:
Variable
±1% F.S.
(Fluid: Dry air)
Analog output:
±3% F.S.
±1% F.S.
(Fluid: Dry air)
±2% F.S. (15 to 35°C)
±5% F.S. (0 to 50°C)
±2% F.S. (15 to 35°C)
±5% F.S. (0 to 50°C)
24 VDC ±10%
0.2 to 10 L/min
0.5 to 25 L/min
1 to 50 L/min
2 to 100 L/min
PFMV
Air, N2Dry air, N2
IP65
LED display
NPN/PNP open collector
Accumulated pulse output
Hysteresis mode:
Variable
Window comparator mode:
Fixed (3 digits)
±1% F.S.
(PF2A70, PF2A7H)
±2% F.S.
(PF2A71)
±3% F.S. (15 to 35°C)
±5% F.S. (0 to 50°C)
±2% F.S.
(PF2A7H: 0 to 50°C)
12 to 24 VDC ±10%12 to 24 VDC ±10%
1 to 10 L/min
5 to 50 L/min
10 to 100 L/min
20 to 200 L/min
50 to 500 L/min
150 to 3000 L/min
300 to 6000 L/min
600 to 12000 L/min
PFMB
Digital
IP40
2-color LCD display
NPN/PNP open collector
Analog voltage output
Analog current output
±1% F.S.
(Fluid: Dry air)
Analog output:
±5% F.S.
Monitor unit
±0.1% F.S.
Analog output:
±0.5% F.S.
±2% F.S.
(15 to 35°C)
±5% F.S.
(0 to 50°C)
Monitor unit
±0.5% F.S.
(0 to 50°C)
24 VDC ±10%
0 to 0.5 L/min
0 to 1 L/min
0 to 3 L/min
2 to 200
L/min
5 to 500 L/min
10 to 1000 L/min
20 to 2000 L/min
−0.5 to 0.5 L/min
−1 to 1 L/min
−3 to 3 L/min
Air, N2
Digital
3-color LCD display
NPN/PNP open collector
Accumulated pulse output
Analog voltage output
Analog current output
Hysteresis mode:
Variable
Window comparator mode:
Variable
±1% F.S.
(Fluid: Dry air)
±2% F.S. (15 to 35°C)
±5% F.S. (0 to 50°C)
Dry air, N2
IP65
12 to 24 VDC ±10%
PFMC
5 to 500 L/min
10 to 1000 L/min
20 to 2000 L/min
Flow Switch Variations/Basic Performance Table
Temperature
characteristics
(25°C reference)
Power supply
voltage
Rated flow
range SettingRepeatability
Hysteresis
OutputDisplay Fluid Enclosure Series
278

®
How to Order
RoHS
MA
Output specifications
Symbol OUT1 OUT2
ANPN NPN
BPNP PNP
CNPN Analog (1 to 5 V)
DNPN Analog (4 to 20 mA)
ENote 2) PNP Analog (1 to 5 V)
FNote 2) PNP Analog (4 to 20 mA)
GNote 2) NPN External input Note 3)
HNote 2) PNP External input Note 3)
Note 2) Made to Order
Note 3) Can be selected from accumulated
flow external reset and peak/bottom
reset.
Option 2
Nil No bracket
R
With bracket Note 7)
Note 7) Each option is not assembled with the
product, but shipped together.
Option 1
Nil
With lead wire and M8 connector (3 m) Note 4)
NWithout lead wire and M8 connector
Note 4) Each option is not assembled with the
product, but shipped together.
Unit specifications
Nil Unit selection function Note 5)
MSI unit only Note 6)
Note 5) Since the unit for Japan is fixed to SI due to new
measurement law, this option is for overseas.
Note 6) Fixed unit: Instantaneous flow: L/min,
Accumulated flow: L
Calibration certificate
Nil None
ANote 8) Ye s
Note 8) Made to Order: Certificate in
both English and Japanese
Option/Part No.
When only optional parts are required, order with the part number listed below.
Part no. Option Note
ZS-40-A Lead wire and M8 connector Length: 3 m
ZS-42-A Bracket Mounting screw for PFMC7501/7102 (M3 x 5, 2 pcs.)
ZS-42-B Bracket Mounting screw for PFMC7202 (M3 x 5, 2 pcs.)
PFMC 501 047
Thread type
Nil Rc
NNPT
FGNote 1)
Note 1) ISO228 compliant
Rated flow range
501 5 to 500 L/min
102 10 to 1000 L/min
202 20 to 2000 L/min
Port size
Symbol
Port
size
Rated flow range
501 102 202
04 1/2 V V —
06 3/4 — — V
PFMC Series
3-Color Display
Digital Flow Switch
279
PFM
PFMV
PFMB
PFMC
PF2A
PF3W
PF2D
LFE
IF
PFMC
A

Refer to pages 202 and 203 for Flow Switch Precautions. For details about the Specific Product
Precautions, refer to the Operation Manual on the SMC website, http://www.smcworld.com
Specifications
Model PFMC7501 PFMC7102 PFMC7202
Fluid Applicable fluid Dry air, N2
(Air quality grade is JIS B 8392-1 1.1.2 to 1.6.2, ISO 8573-1 1.1.2 to 1.6.2.)
Fluid temperature range 0 to 50°C
Flow
Detection method Thermal type
Rated flow range 5 to 500 L/min 10 to 1000 L/min 20 to 2000 L/min
Set flow
rate range
Instantaneous flow 5 to 525 L/min 10 to 1050 L/min 20 to 2100 L/min
Accumulated flow 0 to 999,999,990 L
Minimum
setting unit
Instantaneous flow 1 L/min
Accumulated flow 10 L
Accumulated volume per pulse
(Pulse width = 50 msec.)
1 L/pulse 10 L/pulse
Accumulated value hold function Note 1) Interval of 2 or 5 minutes can be selected.
Pressure
Rated pressure range 0 to 0.8 MPa
Proof pressure 1.2 MPa
Pressure loss Refer to “Pressure Loss” graph.
Pressure characteristics
Note 2)
±5% F.S. (0 to 0.8 MPa, 0.6 MPa reference)
Electrical
Power supply voltage 12 to 24 VDC ±10%
Ripple (p-p) 10% or less
Current consumption 55 mA or less
Protection Polarity protection
Accuracy
Display accuracy ±3% F.S.
Analog output accuracy ±3% F.S.
Repeatability ±1% F.S. (±2% F.S. when response time is set to 0.05 seconds.)
Temperature characteristics
±5% F.S. (0 to 50°C, 25°C reference)
Switch output
Output type NPN open collector
PNP open collector
Output mode Select from Hysteresis, Window comparator, Accumulated output or Accumulated pulse output modes.
Switch operation Select from Normal or Reversed output.
Maximum load current 80 mA
Maximum applied voltage (NPN only) 28 VDC
Internal voltage drop
(Residual voltage)
NPN output type: 1 V or less (at load current 80 mA)
PNP output type: 1.5 V or less (at load current 80 mA)
Response time Note 3) Select from 0.05 sec., 0.1 sec., 0.5 sec., 1 sec., or 2 sec.
Hysteresis Note 4) Variable from 0
Protection Short circuit protection
Analog output
Note 5)
Output type Voltage output: 1 to 5 V, Current output: 4 to 20 mA
Impedance
Voltage output Output impedance: Approx. 1 kW
Current
output
Maximum load impedance at power supply voltage 24 V: 600 W,
at power supply voltage 12 V: 300 W
Minimum load impedance: 50 W
Response time Note 6) Linked with the response time of the switch output.
External input Note 7)
External input Input voltage: 0.4 V or less (Reed or Solid state) for 30 msec. or longer
Input mode Accumulated flow external reset, Peak/Bottom reset
Display
Reference condition
Note 8)
Select from Standard condition or Normal condition.
Unit Note 9)
Instantaneous flow L/min, cfm (ft3/min)
Accumulated flow L, ft3
Displayable
range
Instantaneous flow
–25 to 525 L/min
(Displays [0] when value is within –4 to 4 L/min range.)
–50 to 1050 L/min
(Displays [0] when value is within –9 to 9 L/min range.)
–100 to 2100 L/min
(Displays [0] when value is within –19 to 19 L/min range.)
Accumulated flow 0 to 999,999,999 L
Minimum
display unit
Instantaneous flow 1 L/min
Accumulated flow 10 L
Display
LCD, 2-screen display (Main screen/Sub screen)
Main screen: Red/Green, Sub screen: White
Main screen: 4 digits, 7 segment, Sub screen: 6 digits, 11 segment
Indicator LED LED ON when switch output is ON. (OUT1/OUT2: Orange)
Environmental
Enclosure IP65
Withstand voltage 250 VAC for 1 minute between terminals and housing
Insulation resistance 2 MWor more (50 VDC measured via megohmmeter) between terminals and housing
Operating temperature range Operation: 0 to 50°C, Storage: –10 to 60°C (No condensation or freezing)
Operating humidity range Operation, Storage: 35 to 85% RH (No condensation or freezing)
Standard CE, UL (CSA), RoHS
Piping specifications Rc1/2, NPT1/2, G1/2 Rc3/4, NPT3/4, G3/4
Materials of parts in contact with fluid Stainless steel 304, PPS, Aluminum alloy, HNBR, Si, Au, GE4F
Weight
Piping
specifications
Rc thread
NPT thread
160 g 240 g
G thread 170 g 245 g
Lead wire +80 g
Bracket +25 g +30 g
Note 1) When using the accumulated value hold function, use the operating
conditions to calculate the product life, and do not exceed it. The
maximum access limit of the memory device is 1 million cycles. If the
product is operated 24 hours per day, the product life will be as follows:
•
5 min interval: life is calculated as 5 min x 1 million = 5 million min = 9.5 years
•
2 min interval: life is calculated as 2 min x 1 million = 2 million min = 3.8 years
If the accumulated flow external reset is repeatedly used, the product
life will be shorter than calculated life.
Note 2) Do not release the OUT side piping port of the product directly to the
atmosphere without connecting piping. If the product is used with the
piping port released to atmosphere, accuracy may vary.
Note 3) The time from when the flow is changed by a step input (when the flow
rate changes from 0 to the maximum flow instantaneously) until the
switch output turns ON (or OFF) when set at 90% of the rated flow rate.
Note 4)
If the flow fluctuates around the set value, the width for setting more than
the fluctuating width needs to be set. Otherwise, chattering will occur.
Note 5) Setting is only possible for models with analog output.
Note 6) The time from when the flow is changed as a step input (when the flow
rate changes from 0 to the maximum flow instantaneously) until the
analog output reaches 90% of the rated flow rate.
Note 7) Setting is only possible for models with external input.
Note 8) The flow rate given in the specification is the value at standard
condition.
Note 9) Setting is only possible for models with the unit selection function.
280
PFMC Series
A

Minimum flow of
rated flow range
Maximum flow of
rated flow range
A
B
C
0Flow
Output
Pressure loss [kPa]
Flow [L/min]
0
10
20
30
40
50
0
100 200 300 400 500
Supply pressure
200 kPa
Supply pressure
400 kPa
Pressure loss [kPa]
Flow [L/min]
0
10
20
30
40
50
0
400 800 1200 1600 2000
Supply pressure
200 kPa
Supply pressure
400 kPa
Pressure loss [kPa]
Flow [L/min]
0
10
20
30
40
50
0
200 400 600 800 1000
Supply pressure
200 kPa
Supply pressure
400 kPa
OUTIN
Straight
piping length
109876543210
±0
±1
±2
±3
±4
±5
±6
Accuracy [% F.S.]
Straight piping length [cm]
Rated flow range Set flow rate range Displayable range
Pressure Loss (Reference Data)
PFMC7501 (for 500 L/min)PFMC7102 (for 1000 L/min)PFMC7202 (for 2000 L/min)
Analog Output
Flow/Analog Output
Flow Range
IN Side Straight Piping Length and Accuracy (Reference Value)
•The piping on the IN side must have a straight section of piping with a length of 8 cm or more.
If a straight section of piping is not installed, the accuracy can vary by approximately ±2% F.S.
∗“Straight section” means a part of the piping without any bends or rapid changes in the cross
sectional area.
•When the PFMC7501 or 7102 is connected to tubing, use a tube I.D. 9 mm or more just before
the product. The accuracy can vary by approximately ±2% F.S. when such tubing is not used.
Model Minimum flow of
rated flow range
Maximum flow of
rated flow range
PFMC7501 5 L/min 500 L/min
PFMC7102 10 L/min 1000 L/min
PFMC7202 20 L/min 2000 L/min
ABC
Voltage output 1 V 1.04 V 5 V
Current output 4 mA 4.16 mA 20 mA
Model Flow range
–100 L/min 0 L/min 200 L/min 500 L/min 1000 L/min 2000 L/min
PFMC7501
PFMC7102
PFMC7202
5 L/min
10 L/min
10 L/min
–50 L/min
5 L/min
–25 L/min
500 L/min
525 L/min
525 L/min
1000 L/min
1050 L/min
1050 L/min
20 L/min
20 L/min
–100 L/min
2000 L/min
2100 L/min
2100 L/min
281
3-Color Display Digital Flow Switch PFMC Series
PFM
PFMV
PFMB
PFMC
PF2A
PF3W
PF2D
LFE
IF
PFMC

Brown DC (+)
Black OUT1
White OUT2
Blue DC (−)
U
U
12 to
24 VDC
Load
Load
Main circuit
Brown DC (+)
Black OUT1
White OUT2
Blue DC (−)
U U
12 to
24 VDC
Load
Load
Main circuit
Brown DC (+)
Black OUT1
White Analog output
Blue DC (−)
U
12 to
24 VDC
Load
Load
Main circuit
Brown DC (+)
Black OUT1
White External input
Blue DC (−)
U
U
12 to
24 VDC
Load
Main circuit
Max. 28 V,
80 mA
Black OUT1
White OUT2 (PFMC7--A- only)
Blue DC (−)
Load
Load
Max. 80 mA
Brown DC (+)
Black OUT1
White OUT2 (PFMC7--B- only)
Load
Load
0 V
50 ms
50 ms
0 V
50 ms
50 ms
Brown DC (+)
Black OUT1
White External input
Blue DC (−)
U
U
12 to
24 VDC
Load
Main circuit
Brown DC (+)
Black OUT1
White Analog output
Blue DC (−)
U
12 to
24 VDC
LoadLoad
Main circuit
or or
Internal Circuits and Wiring Examples
NPN (2 outputs) type
PFMC7--A-
Max. applied voltage: 28 V, Max. load current: 80 mA, Internal voltage drop: 1 V or less
NPN (1 output) + External input type
PFMC7--G-
Max. applied voltage: 28 V, Max. load current: 80 mA, Internal voltage drop: 1 V or less
External input: input voltage 0.4 V or less (reed or solid state input) for 30 msec. or longer
NPN (1 output) + Analog (1 to 5 V) output type
PFMC7--C-
NPN (1 output) + Analog (4 to 20 mA) output type
PFMC7--D-
Max. applied voltage: 28 V, Max. load current: 80 mA, Internal voltage drop: 1 V or less
C: Analog output: 1 to 5 V
Output impedance: 1 kΩ
D: Analog output: 4 to 20 mA
Max. load impedance: 600 Ω
Min. load impedance: 50 Ω
PNP (2 outputs) type
PFMC7--B-
Max. load current: 80 mA, Internal voltage drop: 1.5 V or less
PNP (1 output) + External input type
PFMC7--H-
Max. load current: 80 mA, Internal voltage drop: 1.5 V or less
External input: input voltage 0.4 V or less (reed or solid state input) for 30 msec. or longer
PNP (1 output) + Analog (1 to 5 V) output type
PFMC7--E-
PNP (1 output) + Analog (4 to 20 mA) output type
PFMC7--F-
NPN (2 outputs) type
PFMC7--A-
NPN (1 output) + Analog output type
PFMC7--C-
PFMC7--D-
NPN (1 output) + External input type
PFMC7--G-
PNP (2 outputs) type
PFMC7--B-
PNP (1 output) + Analog output type
PFMC7--E-
PFMC7--F-
PNP (1 output) + External input type
PFMC7--H-
Max. load current: 80 mA, Internal voltage drop: 1.5 V or less
E: Analog output: 1 to 5 V
Output impedance: 1 kΩ
F: Analog output: 4 to 20 mA
Max. load impedance: 600 Ω
Min. load impedance: 50 Ω
Accumulated pulse output wiring examples
282
PFMC Series

io!0!1!2qwerty!1!0oiu
Construction/Fluid Contact Parts
Component Parts
No. Description Material Note
1 Sensor body PPS
2 Gasket HNBR
3 Flow rectifier Stainless steel 304
4 Sensor chip Silicon
5
Printed circuit board GE4F
6 Gasket HNBR
7 Body Aluminum alloy Anodized
8 Mesh Stainless steel 304
9 Spacer PPS
10 O-ring HNBR
11 Holder Stainless steel 304
12
Type C retaining ring Stainless steel 304
283
3-Color Display Digital Flow Switch PFMC Series
PFM
PFMV
PFMB
PFMC
PF2A
PF3W
PF2D
LFE
IF
PFMC

50
A
W
V
B
S
U
T
F
E
D
5 1.4
1.5 2 x Port size
(35.5) 42
H
2 x M3 x 0.5 depth 5
LK
N
4 x 4.5
OUTIN
1 (Brown)
2 (White)(Black) 4
(Blue) 3
M8
(3000)
(45)
(15)
ø4
(32.8)
ø10
Dimensions
Lead wire and M8 connector
ZS-40-A
PFMC7501/7102/7202
Cable Specifications
Conductor
Nominal cross
section
AWG23
Outside diameter Approx. 0.7 mm
Insulator
Material Heat resistant PVC
Outside diameter Approx. 1.1 mm
Color Brown, White,
Black, Blue
Sheath Material Heat and oil
resistant PVC
Finished outside diameter ø4
Symbol
Model Port size A B D E F H K L N
PFMC7501/7102 Rc1/2, NPT1/2 70 30 60.6 41.2 15 14 26 18 13.6
PFMC7202 Rc3/4, NPT3/4, G3/4 90 35 66.1 46.7 17.5 24 31 28 16.8
PFMC7501/7102 G1/2 76 30 60.6 41.2 15 14 26 18 13.6
Symbol
Model
Bracket dimensions
S T U V W
PFMC7501/7102 24 22 32 40 50
PFMC7202 30 30 42 48 58
Pin no. Pin name Wire color
1DC (+) Brown
2OUT2 White
3DC (–) Blue
4OUT1 Black Note) 4-wire type lead wire and M8 connector used for the PFMC7 series.
Note) Refer to the Operation Manual in our website for wiring.
284
PFMC Series

Sub
screen
 Selection of display on sub screen
The display on the sub screen in measuring mode can be set.
Set value display Accumulated value display Peak value display
Displays the set value. (The set
value of OUT2 cannot be dis-
played.)
Displays the accumulated val-
ue. (The accumulated value of
OUT2 cannot be displayed.)
Displays the peak value.
Bottom value display Line name display OFF
Displays the bottom value. Displays the line name. (Up to
6 alphanumeric characters can
be input.)
Displays nothing.
PFMC Series
Function Details
 Output operation
The output operation can be selected from the following:
Output (hysteresis mode and window comparator mode) corresponding
to instantaneous flow, or output (accumulated output and pulse
output) corresponding to accumulated flow.
Note) At the time of shipment from the factory, it is set to hysteresis mode and normal output.
Green for ON, Red for OFF
Red for ON, Green for OFF
Red all the time
Green all the time
 Display color
The display color can be selected for
each output condition. The selection of
the display color provides visual iden-
tification of abnormal values. (The
display color depends on OUT1 setting.)
 External input function
This function can be used only when the optional external input is
present. The accumulated flow, peak value and bottom value can be
reset remotely.
Accumulated flow external reset: A function to reset the accumulated flow value
when an external input signal is applied.
In accumulated increment mode, the accumulated
value will reset to, and increase from zero.
In accumulated decrement mode, the accumulated
value will reset to, and decrease from the set value.
∗When the accumulated value is memorized, every time the accumulated
flow external reset is activated, the memory device (EEPROM) will be
accessed. Take into consideration the maximum number of times the
memory device can be accessed, 1 million times. The total of external input
times and accumulated value memorizing time interval should not exceed 1
million times.
Peak/Bottom reset: Peak and bottom value are reset.
Forced output function
The output is turned on/off in a fixed state when starting the system
or during maintenance. This enables confirmation of the wiring and
prevents system errors due to unexpected output.
For the analog output type, when ON the output will be 5 V or 20 mA,
and when OFF, it will be 1 V or 4 mA.
∗Also, the increase or decrease of the flow and temperature will not
change the on/off status of the output while the forced output function is
activated.
 Accumulated value hold
Accumulated value is not cleared even when the power supply is
turned off.
The accumulated value is memorized every 2 or 5 minutes during
measurement, and continues from the last memorized value when
the power supply is turned on again.
The life time of the memory element is 1 million access cycles. Take
this into consideration before using this function.
 Display OFF mode
This function will turn the display OFF. In this mode, decimal points
flash on the main screen. If any button is pressed during this mode,
the display reverts to normal for 30 seconds to allow checking of the
flow etc.
 Setting of security code
The user can select whether a security code must be entered to
release key lock. At the time of shipment from the factory, it is set
such that the security code is not required.
 Peak/Bottom value display
The maximum (minimum) flow rate is detected and updated from
when the power supply is turned on. In peak (bottom) value display
mode, this maximum (minimum) flow rate is displayed.
 Keylock function
Prevents operation errors such as accidentally changing setting values.
Standard condition: Flow rate converted to a volume at 20°C and 1 atm (atmosphere)
Normal condition: Flow rate converted to a volume at 0°C and 1 atm (atmosphere)
 Reference condition
The display unit can be selected from standard condition or normal
condition.
 Display mode
The display mode can be selected from
instantaneous flow or accumulated flow.
Instantaneous flow display
Accumulated flow display
 Response time
The response time can be selected to suit the application.
(Default setting is 1 second.)
Abnormalities can be detected more quickly by setting
the response time to 0.05 seconds.
The effect of fluctuation and flickering of the display can
be reduced by setting the response time to 2 seconds.
0.05 sec.
0.1 sec.
0.5 sec.
1 sec.
2 sec.
285
PFM
PFMV
PFMB
PFMC
PF2A
PF3W
PF2D
LFE
IF
PFMC

Can be changed
10 1000
At the time of shipment
1
5
01050
100
10% of rated
flow range
100% of rated
flow range
Maximum
display range
Flow [L/min]
1000 L/min type
Analog output [V]
 Analog output free range function
Allows the flow that generates an output of 5 V or 20 mA to be changed.
The value can be changed 10% of maximum rated flow to maximum
display value.
 Error display function
When an error or abnormality arises, the location and contents are displayed.
If the failure cannot be solved after the above instructions are performed, please contact SMC for investigation.
Display Description Contents Action
OUT1 over current
error
Load current of 80 mA or more is applied
to the switch output (OUT1). Eliminate the cause of the over current by
turning off the power supply and then turn
on it again.
OUT2 over current
error
Load current of 80 mA or more is applied
to the switch output (OUT2).
Instantaneous flow
error
The flow rate exceeds the upper limit of
indicated flow rate range. Decrease the flow rate.
Reverse flow error There is a reverse flow equivalent to
–5% or more. Turn the flow to correct direction.
PFMC7501
PFMC7102
PFMC7202
Accumulated flow
error
The flow rate exceeds the accumulated
flow rate range. Clear the accumulated flow rate.
System error Displayed if an internal error has
occurred. Turn the power off and on again.
Alternately displays
[999] and [999999].
286
PFMC Series