User manual - RATEMETER STI-73
- Do not use the unit in areas where there is risk of explosions.
- Do not use the unit in areas with significant temperature variations, exposure to
condensation or ice.
- Do not use the unit in areas exposed to direct sunlight.
- Make sure that the ambient temperature (e.g. inside the control box) does not
exceed the recommended values. In such cases forced cooling of the unit must
be considered (e.g. by using a ventilator).
The unit is designed for operation in an industrial environment and must
not be used in a household environment or similar.
2.
GENERAL CHARACTERISTICS
tachometer is measuring of the linear and rotational speed.
The device can be used as frequency meter as well.
Main feature of the tachometer is high precision of measurement (0.02% in full
temperature range). User can set input divider in range 1 to 19 999 and additional scale
coefficients.
The device can be equipped with one relay (or OC type) output. This output can be
controlled depend on momentary value of rotational speed. Device type
is equipped
with RS-485 / Modbus RTU communication interface and sensor supply output. The meter can
be ordered in two power supply versions.
Additional features:
•
settable width of measurement window ( from 0.1 to 39.9 seconds),
•
possible direct access to relay thresholds values,
•
additional multiply and division coefficients for result scaling.
3.
TECHNICAL DATA
Power supply voltage
(depending on version)
External fuse (required)
Power consumption
85...
230
...260V AC/DC; 50 ÷ 60 Hz
(separated)
or 19...
24
...50V DC and 16...
24
...35V AC (separated)
T - type, max. 2 A
max. 4.5 VA @ 85 ÷ 260V AC/DC
max. 4.5 VA @ 16V ÷ 35V AC
max. 4.5 W @ 19V ÷ 50V DC
Pulse input
fully Isolated, with denouncing filter and pulse width
control
Input frequency range
1.5 to 50 000 Hz
Input levels
low level:
high level:
0V ÷ 1V
10V ÷ 30V (about. 12 mA @ 24V)
Display range
0.00000 ÷ 999999
Frequency measurement accuracy
± 0.02% (full temperature range)
4
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