Brochure

34
Series PFM
Function Details
 Indication colour
The indication colour can be selected
for each output condition. The selection
of the indication colour provides visual
identification of abnormal values. (The
indication colour depends on OUT1 set-
ting.)
 Selection of operating fluid
The fluid can be selected. If argon (Ar) or
carbon dioxide (CO
2) is used, the setting
needs to be changed.
Note) When CO
2
is selected, the upper limit of the mea-
sured flow rate range will be 1/2 of that for other fluids.
 Indication mode
The indication mode can be selec-
ted between real-time flow rate and
accumulated flow.
Real-time flow rate display
Accumulated flow display
Dry air, N2
Argon
CO2
Green for ON, Red for OFF
Red for ON, Green for OFF
Red all the time
Green all the time
0.05 sec.
0.5 sec.
1 sec.
2 sec.
 Setting of response time
The flow rate may change momentarily during
transition between ON (open) and OFF (closed) of
the valve. It can be set so that this momentary
change is not detected.
<Principle>
When the switch has been in ON area for a set period of time, the
output will turn on (or off).
Standard conditions: Flow rate converted to a volume at 20°C and 1atm (atmosphere)
Normal conditions: Flow rate converted to a volume at
0°C and 1atm (atmosphere)
If the error or abnormality cannot be solved by the action above, please contact SMC
for further investigation.
Description Contents Action
Flow rate
error
The flow rate exceeds the up-
per limit of indicated flow rate
range.
Decrease the flow rate.
There is a reverse flow equi-
valent to –5% or more.
Turn the flow to correct
direction.
Overcurrent
error
System
error
Zero clear
error
Flow rate
error
Load current of 80 mA or mo-
re is applied to the switch out-
put (OUT1).
Possibility of internal circuit
damage before factory adjust-
ment.
Stop operation immedia-
tely and contact SMC.
System error. Possibility of
data memorising failure or in-
ternal circuit damage.
Reset the unit, and carry
out all settings again.
Load current of 80 mA or mo-
re is applied to the switch out-
put (OUT2).
Eliminate the cause of
the overcurrent by tur-
ning off the power
supply and then turn on
it again.
Perform zero clear of ac-
cumulated flow rate
when there is no flow.
If zero clear is performed (by
holding down and but-
tons simultaneously for 1 sec.)
while there is some flow, “Er4”
will be displayed for 1 sec.
The flow rate exceeds the ac-
cumulated flow rate range.
Clear the accumulated
flow rate. (This error
does not matter when
the accumulated flow ra-
te is not being used.)
 Selection of indication unit reference
The indication unit reference can be selected between standard
conditions and normal conditions.
 External input function
The external input function can be selected from accumulated va-
lue external reset, auto-shift and auto-shift zero.
(Input signal: Connect input line to GND for 30 ms or more.)
External reset: This function resets the accumulated value to “0”
when an input signal is applied.
Auto-shift: This function generates an output corresponding
to the change in relation to real-time flow rate
when an input signal is applied.
Auto-shift zero: This function displays real-time flow rate as “0”
when a positive input signal is applied in the au-
to shift function described above.
Set values and flow rates that are relatively on the negative side
are expressed by illumination of the decimal point on the far left.
 Indication resolution
The indication resolution of the PFM710 and 711 series can be
changed to enable values to be indicated in smaller steps.
 Accumulated value hold
Accumulated value is not cleared even when the power supply is
turned off.
The accumulated value is memorised every 2 or 5 min. during
measurement, and continues from the last memorised 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.
100 resolution
PFM710 by 0.1 l/min
PFM711 by 1 l/min
1000 resolution
PFM710 by 0.01 l/min
PFM711 by 0.1 l/min
 Output operation
The output operation can be selected from the following:
Output (hysteresis mode and window comparator mode) corres-
ponding to real-time flow rate,
Output corresponding to accumulated flow,
Accumulated output pulse output
At the time of shipment from the factory, it is set to hysteresis mode and normal output.
 Error indication function
When an error or abnormality arises, the location and contents
are displayed.
 Peak/Bottom value indication
The maximum (minimum) flow rate is detected and updated from
when the power supply
is turned on. In peak (bottom) value indi-
cation mode, this maximum (minimum) flow rate is displayed.
 Keylock function
Prevents operation errors such as accidentally changing setting
values.
 Zero clear function
Allows the user to adjust the measured flow rate indication to zero.
The adjustment range is
±7%F.S. of the initial factory setting.
 Setting of secret code
The user can select whether a secret code must be entered to re-
lease key lock.
At the time of shipment from the factory, it
is set such that the se-
cret code is not required.
 Selection of power-saving mode
The power-saving mode can be selected.
With this function, if no buttons are pressed for 30 sec., it shifts to
power-saving mode.
At the time of shipment from the factory, the product is set to the
normal mode (the power-saving mode is turned off).
(When power-saving mode is activated, the decimal point flashes.)
 Selection of analog output filter
This selection is available when using a product with an analogue
output.
A signal with fast response speed can be generated by turning
off the analog output filter.
Panel fitting dimensions
1 pc.
Secure mounting of n (2 or more) switches (horizontal)
Secure mounting of n (2 or more) switches (vertical)
31
0
–0.4
31 x n pcs. + 3.5 x (n pcs. – 1)
24 or more
31
0
–0.4
31
0
–0.4
31 x n pcs. + 3.5 x (n pcs. – 1)
24 or more
31
0
–0.4
Cable Specifications
Rated temperature
Rated voltage
Number of wires
Con-
ductor
Sheath
Finished external diameter
Nominal cross section area
Material
Construction
External diameter
Material
External diameter
Standard thickness
Colours
Material
Standard thickness
Colour
105°C
300 V
5
0.2 mm
2
Soft copper wire
40 / 0.08 mm
0.58 mm
Cross-linked vinyl chloride resin compound
Approx. 1.12 mm
0.27 mm
Brown, Black, White, Grey, Blue
Oil-resistant vinyl chloride resin compound
0.5 mm
Light grey (Munsell N7)
ø4.1
Insula-
tion
DC (+) Brown 5
OUT1 Black 4
OUT2 White 3
Analogue output or
auto-shift input Grey 2
DC (–) Blue 1
20
2020
Power supply / Output connector (ZS-28-A)
4 x R2 or less
4 x R2 or less
4 x R2 or less
Note) If a bend (R) is used, limit it to R2 or less.
Dimensions
Series
PFM3