9 Technical Data
9.1 Table to DIN 19259
General Specifications
Manufacturer
Hauser GmbH+Co
Instrument family
Soliphant II
Instrument types
FTM 30 DR, FTM 31 DR, FTM 32 DR
Instrument function
Level limit switch
Application
Limit detection
Maximum or minimum detection in silos with powdery and fine-grained
solids, max. grain size 0.4 in (10 mm)
Operation and System Design
Measuring principle
Damping of the oscillation of a fork vibrating at its resonant frequency
Modularity
Complete limit switch, consisting of the sensor and separate housing and
integrated electronic insert FEM… (switching unit)
Signal processing
– Two-wire AC version (with FEM 41):
load switched directly via a thyristor in the power supply;
– Universal power supply with relay output (with FEM 44, 45):
load switched via a potential-free changeover contact
Electrical isolation
FEM 41
: between sensor and power supply;
FEM 44, 45: between sensor, power supply and load
Input
Measured variable
Height (limit value, binary)
Measuring range
(detection range)
FTM 30 DR: determined by installation point
FTM 31 DR: determined by sensor length (tube)
approx. 16 in …155 in (approx. 400 mm …4000 mm) from above
FTM 31 DR with sliding sleeve: adjustable,
ca. 8 in …150 in (approx. 200 mm …3900 mm) from above
FTM 32 DR: determined by sensor length (rope)
approx. 30 in …765 in (approx. 750 mm …19500 mm) from above
Output
Output signal
Binary, output blocked when reaching limit
Signal failure
Output blocked
Load (connectable)
to FEM 41
Transient (40 ms) max. 1.5 A, max. 375 VA at 250 V
or max. 36 VA at 24 V
(no short-circuit protection)
continuous max. 87 VA at 250 V, max. 8.4 VA at 24 V
min. 2.5 VA at 250 V (10 mA), min. 0.5 VA at 24 V (20 mA)
Voltage drop across FEM 41 max. 12 V
Residual current max. 4 mA with blocked thyristor
Load (connectable)
to FEM 44, 45
FEM 44: 1 changeover contact,
FEM 45: 2 changeover contacts
I~ max. 6 A, U~ max. 250 V;
P~ max. 1500 VA, cos
ϕ
= 1, P~ max. 750 VA, cos
ϕ
> 0.7;
I– max. 6 A to 30 V, I– max. 0.2 A to 125 V;
additional switching delay 0.3 s
Voltage difference between relay output and power supply max. 300 V
Output, General information
Fail-safe switching
Minimum or maximum fail-safe mode, switchable
Switching time
FEM 41, 44: approx. 0.5 s when covered, approx. 1.5 s when free
FEM 45
: approx. 0.5 s when covered, approx. 1.5 s when free,
switchable to approx. 2.5 s when covered,
approx. 7.5 s when free
Accuracy
Reference conditions
Temperature T = 70 °F (20 °C), operating pressure p
e
= 14.5 psi (1 bar)
Density of material > 62.4 lbs/ft³ (> 1 kg/l),
grain size < 0.08 in (< 2 mm)
Measured error
approx. 0.4 in (approx. 10 mm) for vertical mounting,
approx. 0.2 in (approx. 5 mm) for lateral mounting of the sensor
Setting time
The output remains open approx. 2.5 s after switching on the power supply
Switching time error
+/– 25 % when covered or free
Effects of temperature and
operating pressure
negligible
Operating Conditions
Mounting
Orientation
Any position for FTM 30 DR and FTM 31 DR with short tube
Vertical FTM 31 DR with long tube and FTM 32 DR
Lateral load on fork for FTM
30 DR
130 lbs (600 N) on narrow edge of tines, static
Continued overleaf
FTM 30 DR, FTM 31 DR, FTM 32 DR
9 Technical Data
Hauser
31
