KROHNE BM 70 M User Manual
Page 80
80
BM 70 M
Measured value:
± 0.08 mm/°C (quasi-static:
∆
T < 0.5 °C/min)
± 5 mm (change
∆
T > 0.5 °C/min)
Influence of the propagation way (in air or N
2
or O
2
):
-1 ppm/°C of measured distance
Effect of ambient temperature
Signal outputs: see above
Application conditions
Installation conditions
Avoid interfering reflections and multiple reflections
Ambient conditions
Zone 0,1,2
Temperature classes: T6...T1
Hazardous locations
Explosion groups: IIA...IIC
Ambient temperature of signal
converter
-40°C ... +60°C
(depends on flange temperature)
Horn antenna: -30°C … +200°C (depends on Tamb)
optional -60°C
Flange temperature
Solid antenna: -30°C … +125°C (depends on Tamb)
Ambient temperature limits
Signal converter
Measuring function OK, but LCD "freezes": min. -40°C
Functional upper limit, for max. 16 hours: max. +70°C
Storage temperature
-20°C ... +60°C
Climate class
Environmental category F acc. GL
Damp heat 55°C RH=95% for 96 hours
Salt mist (4 times) 5% NaCl spray periods 2 hours, storage 7
days at 40°C RH=93% acc. GL
Ingress protection
(Signal converter) IP 66 / IP 67 (equivalent to NEMA 6/6X)
Shock resistance
Impact test in conformity with EN 61010, Section 8.2 with 0.5
J energy and drop test to prEN 50178:1994
Vibration resistance
2-13.2 Hz: ±1 mm; 13.2-100 Hz: 0.7g
1 octave/min
3 axes: 90 min on each resonance (Q>2) or at 30Hz
3 axes acc. GL
Insulation
HV test min. 1500 V eff. acc. GL
Insul. resistance >10 M
Ω
at 500V DC
EMC
EN 50081-1, EN 50082-2
acc. Ship approvals: discharge 6kV/8kV
field 10V/m 80MHz-1GHz AM
burst 1kV/2kV
conducted 3Veff. 10kHz-80MHz AM
surge 1kV/2kV
cond. emiss. 10kHz-30MHz
rad. emiss. 150kHz-2GHz
Product conditions
Physical properties
No effect on measurement results
Minimum value or relative permittivity required to ensure
reliable measurements
Relative permittivity
r
>
r
< 2: stillwell recommended
Product limitations
Liquid ammonia(NH
3
) under pressure;
Liquid hydrogen(H
2
); liquid helium (He)
Product temperature
Unlimited (pay attention to ambient and flange temperature)
Operating pressure
Dependent on flange size and pressure rate;
standard: max. 16 bar