TRU MEIA Products Mating Durability Test Report

245 Lynnfield Street
Peabody, MA 01960-5099, USA
Tel. 978.532.0775
Fax 978.531.6993
www.trucorporation.com
TRU MEIATM Products
Mating Durability Test Report
Objective
Test & characterize the mating durability of TRU MEIATM Products (MEIA-1625 & MEIA-875) over an extended
number of mating cycles to simulate the lifetime performance of TRU MEIA interface(s). The test will measure and
monitor the following parameters: VSWR, insertion loss, phase, coupling torque, and insertion withdrawal forces to
determine their impact on electrical/ mechanical performance.
A separate test; insertion / withdrawal force will be measured to determine the effect over an extended number of mating
cycles to simulate the lifetime performance of MEIA interface(s).
Test Samples
One (1) each cable assembly described below was subjected to the test.
Sample 1:
MEIA-1625 Cable Assembly: 13.75” length, TRU-920 cable, Fig 1-3
Connector 1: MEIA-1625 (f) Jack, Right Angle
Connector 2: MEIA (m) Plug
Adapter 1: 7-16 (f) to 1 5/8 EIA (f) plus 1 5/8 EIA (m) to MEIA-1625 (m)
Adapter 2: 7-16 (m) to 1 5/8 EIA (f) plus 1 5/8 EIA (m) to MEIA-1625 (f)
Sample 2:
MEIA-875 Cable Assembly: 13.5” length, TRU-450 cable, Fig 4-6
Connector 1: MEIA-875 (f) Jack, Right Angle
Connector 2: SC (m) Plug
Adapter 1: 7-16 (f) to 7/8 EIA (f) plus 7/8 EIA (m) to MEIA-875 (m)
Adapter 2: SC (f) to 7mm
TEST SAMPLE 1
MEIA-1625 Assy.
Adapter 1
Adapter 2
Cable assembly
Figure 1
1 5/8 (m) to MEIA-1625
7-16 (f) to 1 5/8 EIA (f)
MEIA-1625 right angle connector
Figure 2
MEIA-1625 (f) to 1 5/8 (m)
1 5/8 EIA (f) to 7-16 (m)
MEIA-1625 (m) connector
Figure 3
MEIA-875 Assembly
Adapter 2
Adapter 1
Cable Assembly
Fig 4
7/8 EIA (m) to MEIA-875 (m)
7-16 (f) to 7/8 EIA (f)
MEIA-875 right angle connector
Fig 5
SC (m) connector
SC (f) to 7mm
Fig 6
Test & Inspection Conditions:
All individual tests and inspections performed under the following conditions unless otherwise specified in the detail
procedure(s):
Environment:
Temperature:
Relative Humidity:
Barometric Pressure:
Room Ambient, 59 to 86 deg F (15 to 30 deg C)
20% to 80%
Sea Level (650 to 800mm Hg)
Configuration:
Tests and inspections will be performed on a clean flat surface (bench or equivalent) in a clean well-lighted area,
free of debris and foreign objects, unless otherwise specified.
Test & Inspection Equipment:
The following test equipment / tools / fixtures or equivalent were used to perform the test & inspections.
Electrical: (Fig 10)
Vector Network Analyzer (HP 8753E) used on all electrical measurements
Applicable test port cables / adapters for each assembly, set up as applicable per figures 1-9
7-16 Calibration Kit (p/n: Maury Microwave 2750B)
Full 2 Port Calibration:
401 data points
30 Hz BW
S11 measurement = End 1 of cable assembly (right angle connector)
S22 measurement = End 2 of cable assembly (straight connector)
Electrical Test Set-Up
S11
S22
Network Analyzer
Device Under Test
Fig 7
Mechanical: (Fig 8, 9 & 10)
Force Gauge:
Chatillon DFE-100 Used on MEIA-1625 and MEIA-875 contacts per figure 8.
Torque Meter(s):
CDI Torque Products: 751DIN, 3002LDIN per figure 9-10.
Stereo Magnifying Scope: (Vision Engineering p/n)
Digital Height Gauge: Fowler-Trimos V300+
Mechanical Test Set-Up
Torque Meter
Torque Meter
Force gauge
MEIA-875
Contacts
MEIA-1625
Fig 8
Fig 9
Fig 10
Test Procedure:
• Baseline electrical / mechanical tests were performed on each of the sample assemblies:
o VSWR, Insertion Loss, Phase
o Insertion & Withdrawal force
o Interface Dimensions, Visual Examination of Product
• Subject each sample to 500 mating cycles or until a failure occurs.
o Note: a cycle consists of 1 complete electro-mechanical mating onto its corresponding mating adapter or
mating contact and 1 complete un-mating from its corresponding adapter or mating contact.
o Coupling torque for MEIA-1625: 165 in-lbs
o Coupling torque for MEIA-875: 70 in-lbs
• After every 25 cycles (up to 100), then every 50 (up to 500) all electrical / mechanical test & inspections
performed at baseline were repeated on each sample.
The test results were summarized and recorded per the following data:
MEIA-1625
TEST DATA
Withdrawal Force
MEIA-1625
10.0
10.0
9.0
9.0
8.0
8.0
7.0
7.0
Force (lb)
Force (lb)
Insertion Force
MEIA-1625
6.0
5.0
4.0
6.0
5.0
4.0
3.0
3.0
2.0
2.0
1.0
1.0
0.0
0.0
0
50
100
150
200
250
300
0
50
100
Mating Cycles
150
200
250
300
Mate Cycles
f
Typical VSWR
MEIA-1625
1.20
Typical Insertion Loss
MEIA-1625
1.18
0.000
1.16
-0.050
Insertion Loss (dB)
1.14
VSWR
1.12
1.10
1.08
1.06
1.04
1.02
-0.100
-0.150
-0.200
-0.250
-0.300
-0.350
1.00
-0.400
0
50
Freq: 0.3 MHz - 1.5 GHz
100
150
Mating Cycles
200
250
300
0
50
Freq: 0.3 MHz - 1.5 GHz
100
150
Mating Cycles
200
250
300
MEIA-875
TEST DATA
Withdrawal Force
MEIA-875
12.0
12.0
10.0
10.0
8.0
8.0
Force (lb)
Force (lb)
Insertion Force
MEIA-875
6.0
6.0
4.0
4.0
2.0
2.0
0.0
0.0
0
50
100
150
200
250
300
350
400
450
500
0
50
100
150
Mating Cycles
250
300
350
400
350
400
450
500
Mating Cycles
Typical Insertion Loss
MEIA-875
Typical VSWR
MEIA-875
0.000
1.90
-0.100
1.80
-0.200
1.70
-0.300
Insertion Loss (dB)
2.00
1.60
VSWR
200
1.50
1.40
1.30
-0.400
-0.500
-0.600
-0.700
1.20
-0.800
1.10
-0.900
1.00
0
50
100
150
Freq : 0.3 MHz - 3.0 GHz
200
250
300
Mating Cycles
350
400
450
500
-1.000
0
50
100
150
Freq : 0.3 MHz - 3.0. GHz
200
250
300
Mating Cycles
450
500
PHASE CHANGE TEST DATA
MEIA-1625, MEIA-875
Phase Change
10.0
8.0
MEIA-1625
6.0
MEIA-875
Phase (degrees)
4.0
2.0
0.0
-2.0
-4.0
-6.0
-8.0
-10.0
0
50
100
150
200
250
300
350
400
450
500
Mating Cycles
Freq: .3 MHz - 3.0
GHz
Results / Conclusions:
• TRU MEIA-1625 products meet /exceed 250 mating cycles, without any degradation to electrical / mechanical
performance parameters.
•
TRU MEIA-875 products meet /exceed 500 mating cycles, without any degradation to electrical / mechanical
performance parameters.
•
The surface of the interface(s) exhibited wear marks and some plating wear over the threads (see figures 11-14).
•
Recommended mating torque:
MEIA-1625
165 in-lbs +/- 15 in-lbs
MEIA-875
70 in-lbs +/- 10 in-lbs
•
The insertion/ withdrawal forces:
Insertion
MEIA-1625
5-10 lbs
MEIA-875
3-9 lbs
Withdrawal
4-9 lbs
2-8 lbs
Wear marks
Plating worn off threads
Fig 11
Fig 12
Wear marks
Plating worn off threads
Fig 13
Fig 14