Druck- und Temperaturmesstechnik Testing Procedure MH-2 Mobile Hydraulic Testing Procedure 1 Pressure Transmitter MH-2

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Mobile Hydraulic Testing Procedure 2 passing fields & sites dirt hydraulics, engine vibration moisture water holes, rain, cleaning operations cavitation, micro diesel effects internal stresses pressure peaks, changing loads shock ground waves weather conditions, hydraulics temperature electromagnetic interference EMI Mobile Hydraulic Conditions Product is extensively tested for mobile hydraulic

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Mobile Hydraulic Testing Procedure Qualification tests Load cycles Shock Vibration Temperature EMC Ingress Protection … 3 Verify specifications 80 Mio. 500 g 20 g - 40 … 125 º C T amb CE - Conformity IP 67 / IP 69K …

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Mobile Hydraulic Testing Procedure simulate operating conditions Pressure Transmitter goes through a sequence of tests 3 sequences of mechanical tests 7 sequences of environmental tests 2 sequences of electrical tests Market specific tests 4

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Mobile Hydraulic Testing Procedure Market Specific Testing Procedure 80 test objects initial test functionality test mechanical testsenvironmental testselectrical tests 10 test objects5 test objects 10 test objects 5 test objects connector accuracy housing stability impact resistance transport / storage load change test ice-water test vibration duration UV resistance freezing testdry heat test reset behaviour radiates fields connector insertion cycles functionality test humid heat functionality test overvoltage resistance functionality test broad-band noise functionality test vibration short time rapid change of temperature load dump torque housing functionality test dewing test slow load dump torque connector continuous shocks resistance to chemicals freefall functionality test single shock high pressure cleaner test functionality test salt spray test functionality test 5

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Mechanical Tests Connector accuracy for connectors with connection thread Insertion cycles for mating connectors Torque housing (torque < 6 Nm) Torque connector (torque < 2,5 Nm) Housing stability – shear test Impact resistance 6 Market Specific Tests

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Environmental tests - Temperature tests Temperature shock test Dry heat test Dewing test Humid heat test Rapid change of temperature Freezing test 7 Environmental Tests transmitter at ice water (0 º C) into boiling water (100 º C C) 10 cycles 21 h at 100 º C -10 … 60 º C, 80 … 95 % rel. humidity 500 h at 45 º C and 85% rel. humidity 90 min at -40 º C -> 90 min at 100 º C, 30 cycles transmitter being sprayed with water at -4 º C -> cooling down to -5 º C, duration 22 h, 10 cycles

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Shock and Vibration Vibration tests Broad-band noise including temperature superposition (10 … 2000 Hz, -40 … 85 ºC, 6 g, 32 h, 3 axis) Vibration short time (20 … 2000 Hz, 20 g, 2 h, 3 axis) Vibration duration (10 … 300 … 10 Hz, 10g, 150 h, 3 axis) Shock test Continuous shock (40 g, 6 ms, 50 times) Single shock (100 g, 11 ms, 10 times) Drop test (2 m free fall; 2 times per axis) 8 Environmental Tests

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Load cycles Pressure cycles at nominal pressure 9 P [bar] t [s] T amb = 20 º C, > 8 mio cycles T amb = -40 º C, >1 mio cycles T amb = 120 º C, >1 mio cycles Environmental Tests

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Ingress protection IP69K: High pressure cleaner Pressure: 150bar, Distance: 10cm, Duration: 10sec IP67: Water resistance (Submerging in 1 m deep water; duration 30 min) 10 Environmental Tests

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Resistance Salt spray test (Test solution = 5% NaCl, at 35°C, duration = 96h) Chemical resistance test (Hydraulic oil; Petrol; Diesel; Brake fluid; Ethyleneglycol solution (50/50); Phosphatising material) UV resistance test (5h of dry phase, 1h of irrigation; 50°C +/- 3°C; Humidity = 10%) 11 Environmental Tests

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Mobile Hydraulic Testing Procedure Noise resistance test (Fields 100V/m 80…1000MHz / 60V/m 1000…2000 MHz) Overvoltage resistance (Supply voltage: 48 V; test duration: 10 min) Reset behavior (20 supply voltage drops 95 % … 0 % VDDmin) Load dump (Voltage impulse: 46.5V and 66.5V; 400 ms; 5 impulses) Slow load dump (reduce VDDmax to 0% and then increase again to 100%. Change speed 0.5V/min; VDDmax = maximal supply voltage) Electrical tests 12

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Environmental test sequence 80 test objects initial test functionality test mechanical testsenvironmental testselectrical tests 10 test objects5 test objects 10 test objects 5 test objects connector accuracy housing stability impact resistance transport / storage load change test ice-water test vibration duration UV resistancefreezing testdry heat test reset behaviour radiates fields connector insertion cycles functionality test humid heat functionality test overvoltage resistance functionality test broad-band noise functionality test vibration short time rapid change of temperature load dump torque housing functionality test dewing test slow load dump torque connector continuous shocks resistance to chemicals freefall functionality test single shock high pressure cleaner test functionality test salt spray test functionality test 13 Market Specific Testing Procedure

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Example Environmental test sequence 14 Initial test Ice water test Functionality test Vibration test Functionality test Chemical resistance testFunctionality test High pressure cleaner test Functionality test Market Specific Testing Procedure

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Initial Test 3 h at 125 º C 48 h at 110 º C 24 h at -40 º C 2 h at 20 º C 15 initial test functionality test ice-water test functionality test vibration short time functionality test resistance to chemicals functionality test high pressure cleaner test functionality test Market Specific Testing Procedure

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Ice-Water Test Temperature shock test Immersion in ice water (0 º C) for 5 min Immersion in boiling water (100 º C) for 5 min 10 cycles 16 initial test functionality test ice-water test functionality test vibration short time functionality test resistance to chemicals functionality test high pressure cleaner test functionality test Market Specific Testing Procedure

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Vibration short time Frequency range = Hz Acceleration = 20g Test duration per axis = 2h Axes = 3 17 initial test functionality test ice-water test functionality test vibration short time functionality test resistance to chemicals functionality test high pressure cleaner test functionality test Market Specific Testing Procedure

Druck- und Temperaturmesstechnik Testing Procedure MH-2 Resistance to Chemicals hydraulic oil Fuel Diesel brake fluid … Test duration: 3 days 18 Initial test functionality test ice-water test functionality test vibration short time functionality test resistance to chemicals functionality test high pressure cleaner test functionality test Environment Test Example

Druck- und Temperaturmesstechnik Testing Procedure MH-2 High pressure cleaner test Spray angle = 0°, 30°, 60°, 90° Water pressure = 150bar Water temperature = 60 º C Test duration = 10s from all directions 19 initial test functionality test ice-water test functionality test vibration short time functionality test resistance to chemicals functionality test high pressure cleaner test functionality test Market Specific Testing Procedure