SMC Networks PF2M7 Series User Manual

-14-
No.PF※※-OMW0007-A
■Definition and terminology
Terms
Meaning
A
Accumulated flow
The total amount of fluid that has passed through the device. If an instantaneous flow of
10 L/min continues for 5 minutes, the accumulated flow will be 10 × 5 = 50 L.
Accumulated pulse
output
A type of output where a pulse is generated every time a predefined accumulated flow
passes. It is possible to calculate the total accumulated flow by counting the pulses.
Accumulated-value
hold time
A function to store the cumulative flow value in the product's internal memory at certain
time intervals. Reads the memory data when power is supplied. Accumulation of data
begins with the value read at the moment power is supplied. The time interval for
memorizing can be selected from 2 or 5 minutes.
Analogue output
Outputs a value proportional to the flow rate. When the analogue output is in the range
1 to 5 V, it will vary between 1 to 5 V according to the rate of flow. The same for
analogue output of 0 to 10 V or 4 to 20 mA.
Auto-preset
This function will automatically calculate and set the optimum flow rate based on the
actual operating condition when hysteresis mode is selected.
C
Chattering
The problem of the switch output turning ON and OFF repeatedly around the set value
at high frequency due to the effect of pulsation.
D
Delay time
The setting time from when the flow applied to the flow switch reaches the set value, to
when the ON-OFF output actually begins working.
Delay time setting can prevent the output from chattering.
The response time indicates when the set value is 90% in relation to the step input.
digit (Min. setting unit)
Shows how precisely the flow can be displayed or set by the digital flow switch. When
1 digit = 1 L/min, the flow is displayed in increments of 1 L/min, e.g., 1, 2, 3, …, 99, 100.
Digital filter
Function to add digital filtering to the fluctuation of flow value. Smooth the fluctuation of
displayed value for sharp start up or fall of the flow.
When the function is valid, digital filtering is reflected to the ON/OFF of the switch
output.
Output chattering or flicker in the measurement mode display can be reduced by
setting the digital filter.
Display flow range
The range of measured values that can be displayed for a product with a digital display.
E
Error displayed
The code number displayed, identifying the error detected by the self-diagnosis
function of the pressure switch.
Refer to "Error indication" on page 65 for details of the errors.
Error output
Switches the switch output to ON/OFF when an error is displayed.
Refer to "List of output modes" on page 33 for operating conditions.
Refer to "Error indication" on page 65 for details of the errors.
F
F.S.
(Full span, Full scale)
Stands for "full span" or "full scale", and indicates varied display value and analogue
output range at rated value. For example, when analogue output is 1 to 5 V,
F.S. = 5[V] - 1[V] = 4[V], (ref. 1%F.S. = 4[V] x 1% = 0.04[V])
Fluid temperature
range
Range of fluid temperature that can be measured by the product.

SMC Networks PF2M7 Series Specifications

General

Brand	SMC Networks
Model	PF2M7 Series
Category	Switch
Language	English