Maury Microwave A028F User manual

028-61 (Rev A) 04/211
7mm Digital
Connector Gage Kit
Metrology Grade
Model A028F

2900 Inland Empire Boulevard
Ontario, California 91764-4804 USA
Phone: [phone]
Facsimile: [phone]
maurymw.com
028-61 (Rev A) 04/211
Copyright © 2021 Maury Microwave Corporation. All rights reserved.
User Guide
7mm Digital
Connector Gage Kit
Model A028F

Warranty
Maury Microwave hardware products are warranted against defects in materials and workmanship for a
period of one year from date of shipment. During the warranty period, Maury Microwave will, at its option,
either repair or replace products which prove to be defective.
Maury Microwave software products are warranted against defects in material and workmanship of the
media on which the product is supplied for a period of ninety (90) days from date of shipment. Maury also
warrants that the product shall operate substantially in accordance with published specifications during
the same warranty period. During the warranty period, Maury Microwave will, at its option, either repair or
replace products which prove to be defective. Maury does not warrant that the operation of the product
shall be uninterrupted or error-free.
For warranty service or repair, all products must be returned to Maury Microwave and must be issued a
return authorization number by Maury prior to shipment. Buyer shall prepay shipping charges to Maury.
Obligation is limited to the original Buyer.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by
the Buyer, unauthorized modification or misuse, operation outside of the environmental specifications for
the product, or wear resulting from normal use. No other warranty is expressed or implied. Maury
Microwave specifically disclaims the implied warranties of merchantability and fitness for a particular
purpose.
The remedies provided herein are the Buyer’s sole and exclusive remedies. Maury Microwave shall not
be liable for any direct, indirect, special, incidental, or consequential damages whatsoever (including,
without limitation, damages for loss of business profits, business interruption, loss of business
information, or any other financial loss) arising out of the Buyer’s use of or inability to use the product,
even if Maury or an authorized Maury dealer has been advised of the possibility of such damages.

028-61 (Rev A) 04/211 i
Contents
General Information ...................................................................................................... 1
Gage Kit Description ........................................................................................................... 1
Operation ....................................................................................................................... 4
Cleaning .............................................................................................................................. 7
Error Messages ................................................................................................................... 7
Gaging Precision 7mm Connectors .................................................................................... 8
Gaging Sliding Loads ........................................................................................................ 10
Gaging 7mm Air Lines ....................................................................................................... 13
Maintenance ...................................................................................................................... 15
Calibration ......................................................................................................................... 15
Appendix ...................................................................................................................... 17
Data Sheet Resources ...................................................................................................... 17
Contacts ....................................................................................................................... 19

028-61 (Rev A) 04/211 1
General Information
Gage Kit Description
The Maury model A028F connector gage kit is designed to measure 7mm connectors with either female or male
interfaces. The digital indicators used in the A028F connector gage kit provide a measurement resolution of
.0001” when used in the inch mode or .001mm (0.000040 inches) when used in the metric mode. For simplicity,
the rest of this manual will refer to measuring in inches. However, the principles presented apply equally when
used in metric mode. The Maury A028F connector gage kit achieves excellent repeatability by maintaining tightly
controlled tolerances on all machined parts.
The Maury model A028F1 measures 7mm connectors this gage assembly uses a “thread-on” design that
simulates actual mating conditions, allowing high accuracy measurements and hands-free operation. The
connector gage assemblies are initially set to zero using master setting gages, A028F1, permitting measurements
to be read directly on the digital indicator. Centering sleeves are provided for measuring beadless air lines and
mismatch air lines. Flush setting sliding loads is easily accomplished using the A028F1. The thread-on design of
the A028F also allows more convenient and accurate measurements of network analyzer test ports.
Maury models A028F1 connector gages are compatible with Mitutoyo SPC Digimatic readouts for external display
of data. Use Maury model A048B1 & A048B2 data cables. See Figure 2. All machined parts are made from
heat treated stainless steel to assure long life and excellent stability. Gaging surfaces are lapped to ensure a high
degree of accuracy. A parts list is shown in Table 1.
Item Description Maury Part Number Quantity Per Assy. Notes
1 Indicator Assembly A028F1 1 —
4 Master Gage A028D2 1 —
5 Sleeve Set (2) A028S1 1 *
6 Aligning Pin 028-30 1 *
7 Torque Wrench, 3/4 2698C2 1 12 in/lbs
8 Open End Wrench, 1/2 2517S3 1 —
9 Battery SR44** (1) Commercial
10 Data Cable (40 inch) A048B1 (1) (Optional)
11 Data Cable (80 inch) A048B2 (1) (Optional)
* The centering sleeves and aligning pin are shipped in small plastic containers
** 20,000 hour life.
Table 1. Parts List

General Information
2 028-61 (Rev A) 04/211
Figure 1. The A028F Connector Gage Kit

General Information
028-61 (Rev A) 04/211 3
Figure 2. Data Output

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Operation
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Operation
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Specifications
In order to determine the specifications for the A028F gages, Maury performed an extensive gage study with the
gages at the Maury factory. The study involved the use of multiple gages and personnel making multiple
measurements of a known standard. A statistical analysis was performed on the data collected and the resultant
+/- 2-sigma value was determined. Maury considers this value to be the achievable uncertainty under carefully
controlled conditions in a controlled environment. The +/- 2-sigma uncertainty for the Maury A028F connector
gage is +0.0018mm (+0.000070inches).

Operation
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Operation
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Visual Inspection
Inspect all connectors carefully before each use. If a connector shows deep scratches, dents, uneven wear, or
particles clinging to the mating plane surfaces, clean it and inspect again. Damaged connectors should be set
aside for repair. Also, try to determine the cause of the damage before making further connections.
Cleaning
Use dry compressed air at a very low velocity first; then a solvent such as isopropyl alcohol. Clean the contacting
surfaces, alignment parts and threads using a lint free swab. Then re-inspect the connector to make sure that no
fibers have been left around the contact and interface surfaces.
NOTE: To maintain cleanliness, always wear cotton gloves when performing any of the procedures described in
this manual.
CAUTION: For optimum measurements and to prevent damage, always hold the connector gage on the knurled
part of the bushing when connecting. Never rotate parts against each other since this could yield faulty readings
or damage the mating surfaces.
Error Messages
Figure 3 show the error messages which the indicator may display, as well as the appropriate response.
Figure 3. Operating Procedures and Error Messages

Operation
8 028-61 (Rev A) 04/211
Gaging Precision 7mm Connectors
The critical mechanical specification in precision 7mm connectors is the recession (setback) of the center
conductor relative to the outer conductor mating plane (Figure 3 and 4). No protrusion of the center conductor in
from of the outer conductor mating plane is allowable.
The following procedure applies to the connector gage. For the connector gage A028F1, use the A028D2 master
setting gage.
Before measuring a 7mm connector. Use a collet extraction tool similar to the Maury 2697S5, remove the spring
collet contact. Use care in this operation. Do not nick or scratch the end of the inner conductor or damage the
contact itself.
Procedure: Refer to Figure 4
1. Visually inspect the mating surfaces of your A028F1 connector gage and A028D2 master setting gage
2. Clean all mating surfaces of the master setting gage and connector gage using the recommended
cleaning procedure above.
3. Push the ON/OFF button on the indicator to turn on the display.
4. Push the in/mm button until the display reads “in”
5. Set the +/- button so that the REV sign does NOT appear on the LCD.
NOTE: Without anything connected to the gage and the REV sign NOT appearing in the display the gage
should show a minus (-) number.
6. Extend the coupling sleeve of the 7mm connector to be measured.
7. Align the connector gage and master setting gage carefully, then rotate the nut on the gage, allowing it to
engage with the thread of your A028D2. Apply light finger pressure avoiding rotation of the mating planes.
If you use a torque wrench, it should be rated at 12 inch-pounds. Maury model 2698C2 is recommended
and supplied with the A028F kit. Hold the corresponding part with the 3/4 open end wrench supplied with
the kit.
8. Push and hold the ORIGIN button until the display reads 0.0000 inches. This sets the indicator reading to
the nominal dimension of .000” (or other nominal dimensions provided by other master setting gages).
9. Gently loosen and disengage the connector gage and the master gage
10. Reinsert collet after measurement of connector is complete.

Operation
028-61 (Rev A) 04/211 9
Figure 4. Gaging Precision 7mm Connectors

Operation
10 028-61 (Rev A) 04/211
Sliding Loads and Air Lines
Most sliding loads come equipped with a simple center conductor lock consisting of some form of clamping
mechanism. The sliding load connector interface is usually set for a “zero gap” or “flush set” as described below.
NOTE: Gaging the sliding load is not required for zero gap operation.
For flush set operation, the sliding load center conductor is first set to the correct position using a connector gage.
Then the center conductor is aligned axially and connected to the mating connector.
NOTE: The nominal interface dimension is set using the A028F type connector gage.
Gaging Sliding Loads
CAUTION: This section may not have complete information for your particular sliding load. Please consult the
manual for your sliding load first.
The following procedure applies to sliding loads. For 7mm sliding loads, use the A028F1 and A028D2 master
gage. For in-depth information on how to properly set the interface dimension, refer to the manual provided with
your sliding load.
Procedure
Refer to Figures 5.
1. Visually inspect the mating surface of the connector to be gaged before making a connection.
2. Clean all mating surfaces: connector, master setting gage and connector gage.
3. Zero set your connector gage with the appropriate master gage.
4. Remove the centering pin from the sliding load center conductor.
5. Loosen the center conductor locking mechanism in the rear of the sliding load.
6. Align the connector gage and the connector of the sliding load. Then carefully insert the aligning pin of the
A028F1 into the sliding load center conductor.
7. Adjust the center conductor position so that it is within the specified interface dimension for a 7mm
connector. (See Figure 6). Tighten the center conductor locking mechanism.
8. Disengage the sliding load and A028F1.
9. Reinsert the centering pin of your sliding load.

Operation
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Figure 5. Gaging Precision Sliding Loads

Operation
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Figure 6. Interface Requirements for 7mm Connector