Sierra Monitor Corporation PF2A7 series Instruction Manual

SAFETY 2

Model Indication Method 4

Name and Functions of Individual Parts 5

Installation 6

Example of Internal Circuit and Wiring 8

Setting 10

OUT1 Output Specifications 11

Function Setting 13

Other Functions 18

Specification 20

Full View with Dimensions 22

Thank you for purchasing the SMC PF2A7□H Series Digital Flow
Switch.
Please read this manual carefully before operating digital flow
switch and understand digital flow switch, its capabilities and limi­tations. Please keep this manual handy for future reference.

OPERATOR

●This operation manual has been written for those who have

knowledge of machinery and apparatus that use pneumatic
equipment and have full knowledge of assembly, operation and
maintenance of such equipment.

●Please read this operation manual carefully and understand it

before assembling, operating or providing maintenance service
to the flow switch

.

CONTENTS

32

SAFETY

IMPORTANT MESSAGES

WARNING

NOTE

Indicates a potentially hazardous situation
which could result in death or serious
injury if you do not follow instructions.

Gives you helpful information.

Read this manual and follow its instructions. Signal words such
as WARNING and NOTE will be followed by important safety
information that must be carefully reviewed.

Do not disassemble, remodel (including change of printed
circuit board) or repair.

An injury or failure can result.

Do not operate beyond specification range.

Fire, malfunction or switch damage can result.

Do not use with a combustible fluid.

Otherwise, a fire or an explosion or damage may potentially result.
This flow switch is for air only.

Do not operate in a combustible gas or explosive gas
atmosphere.

Fire or an explosion can result.
This flow switch is not an explosion proof type.

WARNING

The Digital Flow Switch and this manual contain essential information
for the protection of users and others from possible injury and
property damage and to ensure correct handling.
Please check that you fully understand the definition of the following
messages (signs) before going on to read the text, and always follow
the instructions.

NOTE

Follow the instructions given below when handling your flow
switch.

Otherwise, the switch may be damaged or may fail, thereby

resulting in malfunction.
・Do not drop it, bring it into collision with other objects or apply

excessive shock (490m/s

2

or more).

・

Do not pull the lead wire with force nor lift the main unit by holding

the lead wire. (Pulling strength less than 49N)

・Wiring correctly.
・Do not wiring while power is on.
・

Do not wire with the same circuit of power line or high-voltage line.

・Do not use in a place in which water, oil, or a chemical is

splashes.

・Install a filter and/or mist seprator on the primary side ( inlet

side) if foreign matter is feared to mix in a fluid.

・

Flush the dust in the piping with air blow before piping the switch.

・Do not push the setting buttons by a sharply pointed object.
・Apply the power.supply when the flow rate is zero.
・

Start measurement by the flow switch three seconds after turning

on the power.

・

Maintain the switch status for measurement output before setting

when initializing or setting a flow rate of the flow switch.
Measure after checking impacts to the equipment.

・

Opening and closing of flow passage by restrictor should be

within max.

measured flow rate value.

54

Unit Specification

No Symbol:Unit selection function provided

-

M: SI units fixed

Lead Wire Specification

No Symbol: Lead wire with connector 3m
N: None Lead wire with connector

PF2A7 H- -

Flow Rate Range

03: 150 to 3000 /min
06: 300 to 6000 /min
12: 600 to 12000 /min

NOTE1:

The revised Measurement Law of Japan
does not allow use of meters or measuring
instruments, which have a unit selection
function, in Japan.

NOTE2: The fixed unit

For instantaneous flow rate is : /min
For integrated flow rate is : , m

3

,

m

3

×

10

3

Port Screw Type

No Symbol: Rc N: NPT F: G

Body

Flow switch sensor body.
The arrow on the side of
the body indicates the
direction of flow.

Display Part

Output( OUT1)Lamp : Lit when OUT1 is ON.

Flickers when an overcurrent error occurs.

Flow display : Instantaneous flow, integrated flow and set value are

displayed.
Flow check display : Flickering interval varies depending on the flow.
Unit display : Selected unit is displayed. Single unit type is displayed

in SI unit ( /min or , m

3

, m

3

×

103).

▲

Button (UP) : Selects a mode and increases a set ON/OFF value.

▼Button (

DOWN

):

Selects a mode and decreases a set ON/

OFF

value.

Button (MODE) : Changes the mode.

Button (SET) : Changes the mode and sets a set value.

＊RESET

Pressing the ▲and ▼buttonssimultaneously will activate the RESET
function. Use this
function to clear errors
when a trouble occurs.

●

SET

●

MODE

Body

Lead wire with connector
on one end (option)

Piping Port(

OUT

)

Display part

Connector

Piping port
(IN)

UP

DOWN

MODE

SET

Flow check display

Output(

OUT1

)

display

Button(MODE

)

▼

Button (DOWN

)

▲

Button (UP

)

Button (SET

)

FLOWSWITCH

ANR
OUT

Unit display

Flow display

●

MODE

●

SET

Accessories

(When no symbol is specified

for wiring in the type specification)
Lead wire with connector on one end
(3 m in length)

Names and Functions of Individual Parts

Output Specification

28: NPN open collector 1output

+ Analog output (1 to 5V)

29: NPN open collector 1output

+ Analog output (4 to 20mA)

68: PNP open collector 1output

+ Analog output (1 to 5V)

69: PNP open collector 1output

+ Analog output (4 to 20mA)

Model Indication Method

Piping Port

10: Port size 1 (Applicable for PF2A703H)
14: Port size 1･1/2 (Applicable for PF2A706H)
20: Port size 2 (Applicable for PF2A712H)

Piping port

This port connects with
pipeline. Use a pipe fitting to
connect with external pipeline.