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Manual Number 9018205       Revision F, April 1, 2021    

8

 

SECTION 2  PRE-INSTALLATION CONSIDERATIONS 

2.1  COOLING 

The CH93 will become warm when in use; however no external cooling is required. This is normal 
and within operational parameters. No special mounting considerations are required, although 
mounting to a metal surface can help dissipate any heat generated and extend the life of the 
product. 

 

2.2  EQUIPMENT LOCATION 

The CH93 Digital Clock / USB Charging Port is designed for a circular rear panel mount 
configuration, allowing for installation in a cockpit or cabin. Clearance should be provided for the 
input mating connector which may require an additional inch of clearance beyond the rear of the 
unit. 

 

2.3  ROUTING OF CABLES 

Avoid sharp bends in cabling and routing near aircraft control cables. Avoid close proximity and 
contact with aircraft structures, avionics equipment or other obstructions that could chafe wires 
during flight and cause undesirable effects. 
 

2.4  LIMITATIONS 

Environmental qualifications were verified per RTCA DO-160, Revision G in lieu of those identified 
within the minimum performance standards (MPS) of the TSO.  
 
The conditions and tests for TSO approval of this article are minimum performance standards. 
Those installing this article, on or in a specific type or class of aircraft, must determine that the 
aircraft installation conditions are within the TSO standards, specification of the article and 
deviations as listed above. TSO articles must have separate approval for installation in an aircraft. 
The article may be installed only according to 14 CFR part 43 or the applicable airworthiness 
requirements. 
 
Note:  Per 8300.16 job aid applicable to airplanes certified under Title 14 of the Code of Federal 
Regulations part 25 (Section H. Alterations or Repairs, Element H.7). (

Approval is required for

Changes to designs involving lithium batteries or battery systems 

except

 for the following cases: 

1.  Very small batteries or battery systems (e.g., button/coin cells) not required for safe 

operation of the airplane that have less than 2 watt-hours of energy and meet UL 
1642,UL 2054 or International Electrotechnical Commission(IEC) 62133. 

 
The battery in the CH93 is non-rechargeable and considered “very small”. It is less than two Watt-
hours and is certified to UL 1642. No STC or coordination with the ACO is required. 

 

 

 

Summary of Contents for 6420093-0

Page 1: ...Manual Number 9018205 Revision F April 1 2021...

Page 2: ...it free of errors some may occur When reporting a specific problem please describe it briefly and include the manual part number the paragraph figure table reference and the page number Send your com...

Page 3: ...ROUTING OF CABLES 8 2 4 LIMITATIONS 8 2 5 MODIFICATION 9 SECTION 3 INSTALLATION 10 3 1 GENERAL 10 3 2 PRE INSTALLATION INSPECTION 10 3 3 PARTS 10 3 4 CABLE HARNESS 11 3 5 INSTALLATION 13 SECTION 4 OP...

Page 4: ...Added Environmental Qualification Statement to Section 6 TV D 03 21 2016 Added Qualifications to Section 1 3 WVC E 10 30 2018 Updates for MOD 1 function enhancements Revised elapsed timer to include c...

Page 5: ...in some cases require up to 3 amps to charge and operate Unlike most dual USB chargers which provide one 1 0 amp on one port and 2 1 amps on the second port the CH93 provides 3 amps per port The Type...

Page 6: ...ust Aircraft dim adjust Pin 1 6 digit display window Push button operation 3x Dual USB Charging Ports Figure 1 1 CH93 Type 1 Drawing 2 Unit 1 86 2 39 1 86 2 39 4X 6 32 UNC 6420093 0 6420093 3 6420093...

Page 7: ...ICAL SPECIFICATIONS Electrical Attributes Input Voltage 0 2 3 4 5 10 32 VDC 22 32 VDC Input Power 0 2 3 4 5 5 watts max 0 3 amps 14 VDC 0 15 amps 28 VDC 36 watts max 2 6 amps 14 VDC 1 3 amps 28 VDC 21...

Page 8: ...pe A USB Type C USB Clock Digits 0 360 H x 0 138 W Connector Kit Type 1 Type 2 MCIA P N 9018178 MCIA P N 9018178 1 Mounting Rear Panel Mount Table 1 4 Internal Battery Attributes Type Primary non rech...

Page 9: ...identified within the minimum performance standards MPS of the TSO The conditions and tests for TSO approval of this article are minimum performance standards Those installing this article on or in a...

Page 10: ...he nameplate by the lack of marking on the MOD numbers 1 through 9 i e 1 9 are visible All subsequent modifications are identified on the nameplate by the marking blacking out of that particular MOD n...

Page 11: ...ng Port s MCIA P N 6420093 B Installation and Operation manual MCIA P N 9018205 C Installation Kit for Type 1 MCIA P N 9018178 Mating Connector 4 Pin Pins 6 4 required 2 spares Screws 5 6 32 x 3 8 Fla...

Page 12: ...nded wire 14 ft Table 3 1 Wire Gauge and Length Note For Type 1 units 2 pins should be crimped using Molex Hand Crimp Tool 63819 0000 preferred 63811 2800 obsolete or 11 01 0200 obsolete See the Molex...

Page 13: ...wer and ground wires in the proper mating connector locations could damage the unit Once the cable harness is prepared prior to connecting the CH93 activate the aircraft power bus and use a multimeter...

Page 14: ...djusted according to Section 4 4 prior to installing the unit Mount the CH93 with 6 32 flat head screws provided with installation kit NOTE The maximum screw length used to mount the unit is 9 32 0 28...

Page 15: ...otect both the unit and any devices being charged from damage in the event of the fault conditions listed below Short Circuit Protection The CH93 is capable of surviving a short circuit event without...

Page 16: ...ation of external and automatic control For fully automatic control the internal photocell is used to adjust the brightness from minimum to maximum brightness by sensing and responding to the current...

Page 17: ...ment level in a dark or night time cockpit environment If the unit is receiving a dimming input voltage ADJ2 is displayed If used both should be set to the appropriate preference Once set the photocel...

Page 18: ...Display and set local time Display and set UTC time Resettable and non resettable flight timers Elapsed count up and count down timers Displays bus voltage Displays OAT and or cockpit cabin temperatur...

Page 19: ...nd to either display or hide seconds displaying or hiding seconds setting applies to both local and UTC time Setting hours in local time is independent of UTC time For setting the minutes Type 1 units...

Page 20: ...ing seconds setting applies to both local and UTC time Setting hours in UTC time is independent of local time For setting the minutes Type 1 units apply the setting to both local and UTC time concurre...

Page 21: ...active Flight time is displayed in hours and tenths of hours up to 99999 9 hours The flight timer maintains the accumulated time but does not run when power is off Two flight timers are available on t...

Page 22: ...the display shows 00 00 00 or the unit is counting up and not blinking The elapsed timer counts up to a maximum of 99 hours 59 minutes 59 seconds and then starts again at zero Pressing the button star...

Page 23: ...e changes the unit to Voltage mode and the VOLTS annunciation will be backlit refer to Figure 4 13 Voltage mode is only available in CH93 Type 2 units When in Voltage mode the bus voltage Volts DC Dir...

Page 24: ...support one or two temperature inputs One input is designed to measure and indicate Outside Air Temperature OAT and the other to measure and indicate inside cockpit or cabin air temperature Either or...

Page 25: ...connected to the CH93 the temperature display will initially appear like Figure 4 17 If two probes are connected must be one of each type the unit can be configured to identify one probe as Outside A...

Page 26: ...Manual Number 9018205 Revision F April 1 2021 25 Figure 4 20 Temperature Sensor Configuration First Temperature Probe...

Page 27: ...Manual Number 9018205 Revision F April 1 2021 26 Figure 4 21 Temperature Sensor Configuration Second Temperature Probe...

Page 28: ...ons per Figure 4 22 Figure 4 22 Temperature Sensor Configuration Uninstalling Temperature Probes Display Test Mode To test the CH93 display press and hold both buttons for 2 seconds After 2 seconds al...

Page 29: ...ire to create a harness that connects the probe s mating connector to the CH93 mating 9 pin d sub connector Refer below to Figure 4 14 for pinout connection to the CH93 unit Refer to Figure 4 24 13 0...

Page 30: ...pin 6 of the CH93 mating 9 pin d sub connector 4 6 2 2 Interior Transducer Probe The MCIA p n B 11 2 is a 120 inch long 10 foot Cockpit Cabin Interior Temperature Current Sense Transducer Probe that m...

Page 31: ...replaced per the instructions below Type 1 units Remove unit from service and return to Mid Continent Instruments and Avionics for battery replacement Type 2 units Remove unit from the panel and loose...

Page 32: ...on 9 Category X Waterproofness 10 Category X Fluids 11 Category X Sand and Dust 12 Category X Fungus 13 Category X Salt Fog 14 Category X Magnetic Effect 15 Category Y Power Input 16 Category B XX Vol...

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