KROHNE MAGCHECK EN - Manual (Page 4)

MagCheck 4
MagCheck
Technical Data
Measured data and accuracy
of MagCheck
Operating data
Permissible operating temperature
+ 5 to +40 °C
Permissible storage temperature -20 to +60 °C
Relative humidity
≤ 80%, moisture condensation not permissible
Housing material polyamide
Display LCD, 4 lines plain text in German, English or French
Keypad rugged alphameric sealed keypad
Protection category (IEC 529 / EN 60 529) IP 40
Power supply
for device verification
from the field current of the device under test (no batteries required)
for downloading at the PC from the supplied plug-in power supply unit,
nominal voltage 100-240 V AC / 50-60 Hz / approx. 5 W
Storage capacity for automatic verification data of up to 70 measuring points
verification MagCheck indicates the number of allocated memory locations,
locations deallocated after downloading
Reference conditions
MagCheck temperature
+18 to +25 °C
Ambient temperature +18 to +25 °C
Relative humidity
≤ 80 %
Warm-up time, acclimatization 10 minutes
Tolerance of Error limits for acceptance
MagCheck at of device under test
reference conditions
Field current
Current amplitude (nom. 125 / 250 mA)
± 0,1 % of value, ± 0,3 % of value,
Feldfrequenz measurement for testing of field frequency setting,
information only changes produce a warning message
Linearity and accuracy of ADC
ADC at 25 %
± 0.1 % v
≥ 1 m/s; ± 0.4 % of meas.val.
ADC at 50 % ± 0.1 %
ADC at 75 % ± 0.1 % v < 1 m/s; ± (0.2 % of meas.val. + 2 mm/s)
ADC at 100 % ± 0.1 %
all other values in manual calibration test ± 0.1 %
Calibration points of mA output
4 mA point ± 22 µA ± 0.2 % of full-scale range (22 mA)
20 mA point ± 22 µA ± 0.2 % of full-scale range (22 mA)
all other values in manual calibration test ± 22 µA ± 0.2 % of full-scale range (22 mA)
Pulse output
Test at 500 Hz
± 0.1 % ± 0.2 %
At primary head,
automatic verification only
Coil resistance
± 1 % or ± 1
Ω
40
Ω < acceptable < 250 Ω
Coil insulation ± 5 % > 2 M
Ω
Electrode resistance when meas. tube filled ± 1 % or ± 50
Ω
150
Ω < acceptable < 250 kΩ
Electrode resistance when tube empty ± 5 % > 6 M
Ω
The responsibility as to the suitability, intended use and corrosion-resistance of the materials used in
their construction rests solely with the purchaser.