Datasheet

Series PFMB
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 colour
The display colour can be selected for
each output condition. The selection of
the display colour provides visual iden-
tification of abnormal values. (The
display colour depends on OUT1
 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 analogue 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.
 Reset to the default settings.
The product can be returned to its factory default settings.
 Power-saving mode
The display can be turned off to reduce the power consumption.
In this power-saving mode, decimal points flash on the main screen.
If any button is pressed during power-saving 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.
Can be changed
 Analogue 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.
10
1000
At the time of shipment
1
5
0
1050
100
10% of rated
flow range
100% of rated
flow range
Maximum
display range
Flow [L/min]
1000 L/min type
Analogue output [V]
 Reversed display mode
When the switch is used upside down, the orientation of the display
can be rotated to make it easier to read by using the display rotating
function.
With display rotating function
Display is upside down.
INOUT
INOUT
15