Flowmeters: Flow/frequency switch
- 5A SPCO relay
- Non volatile memory
- 18-24V dc operation
- Pulse input
- Selectable hysterisis
- 0 - 50°C
- Competitively priced
- Wall mounting
- 4 frequency ranges
- Sensor PSU (5V)
- IP65 enclosure
- Output status LED
- Ideal for:
- Cooling water alarms
- Test rigs
- Control systems
- Critical oil flows
Flowmeters: Flow/frequency switch: Specification
Power
18 - 24 V dc or ac
Output
Single pole change over relay - voltage free
Signal
Pulse input compatible with reed switch, Hall effect or optical detectors
Display
Status LEDs
Red for relay output
Enclosure
IP65 (NEMA 4X) High impact polycarbonate
Temp
0°C to +50°C.
Frequency range
0.25/0.5 to 5000 Hz.
Selectable. In four ranges
Adjustable hysterisis
Sensor Supply
5 volts regulated up to 50mA
Flowmeters: Flow/frequency switch - Order codes
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Titan Flowmeters: Flow/frequency switch:
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This simple wall, or in some cases, flowmeter mounted instrument
gives an adjustable set point with a single pole, voltage
free relay output. There are two hysterisis levels to prevent relay
flutter at the selected set frequency input. The standard converter
has an input frequency range of 0.5 to 5 KHz. Four
operating ranges are selectable via a pair of DIL switches these
are nominally :- 100, 500 1000 and 5000 Hertz. A special lower
range version is available for use with lower frequency inputs
such as positive displacement flowmeters, this device operates
down to 0.25 Hz. The status LED on the circuit board indicates
when the relay has operated. The enclosure is a high impact
polycarbonate that seals the unit to IP65 (NEMA 4X). Access to
the terminals is normally via a pair of glands on the bottom of the
enclosure.
Titan Flowmeters: Flow/frequency switch: Calibration
As with nearly all of our products calibration is
performed for you at our factory on equipment
that has traceable calibrations to national
standards. If for any reason the flow switch
requires re-calibration in situ the following
procedure may be followed.
1. Select from the chart below the
anticipated operating range for the
instrument.
2. Select high or low hysterisis.
3. Set the flow you required for the set
point or inject a frequency equivalent to
this and adjust the potentiometer until
the relay just operates.
Frq. Range | Lk1 | Lk2 | Lk3
100 Hz | off | off | off
500 Hz | on | off | off
1000 Hz | off | on | off
5000 Hz | on | on | off
Link 3 is for the hysterisis and is approximately
25% open and 50% when the link is
made.
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