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G2/G3/G4 Topics

  1. Question 1, What is the size of the G Series Engine Monitors?
  2. Question 2, What is the difference between "Live G Force" and 2-axis turbulence screen?
  3. Question 3, What is file system on your SD card?
  4. Question 4, Oil temperature placement?
  5. Question 5, Insight Warranty?
  6. Question 6, Instrument Length with connector?
  7. Question 7, What is in a G3 kit?
  8. Question 8, Where to install TIT probe?
  9. Question 9, Different lean box color?
  10. Question 10, G Series uses 24 hour clock?
  11. Question 11, Cessna Carburetor MA4-5?
  12. Question 12, How to set configuration page on G3-G4?
  13. Question 13, Check brightness?
  14. Question 14, How to set Total Fuel?
  15. Question 15, About Buss voltage?
  16. Question 16, Setting GPS interface?
  17. Question 17, Graphing flight data?
  18. Question 18, How to graph data Video?
  19. Question 19, FFT setting and leaning question?
  20. Question 20, Monitor troubleshooting?
  21. Question 21, Wiring harness warning?
  22. Question 22, Do not over bend probes?
  23. Question 23, Good grounding on aircraft?
  24. Question 24, Checking D-Sub Connector?
  25. Question 25, Ferrite Suppressor?
  26. Question 26, Airframe ground?


1

G

G Size

G4

G4


2

Q.  What is the difference between the new "Live G Force" screen and the vertical component of the 2-axis turbulence screen? 

It seems both are displaying the vertical component in Gs.

A.  The TWO AXIS TURBULENCE screen displays the G force in the vertical axis and in the yaw axis simultaneously on one screen. The VERTICAL AXIS component of this screen samples the G force in the vertical axis once per second and displays the sampled value with an accuracy of three decimal points. The sampled value is plotted on a graph with a fixed scale that ranges from +2 Gs to -2Gs.  As a result this fixed scale and fixed resolution small values are not easily discernible.

The latest version of the software for both the G3 (version 284) and the G4 (version 159) includes a new feature where the G3/G4 samples the G force in the vertical axis ten times a second. If the actual G force is ever outside the acceptable range, as defined by a user selectable threshold, then the G3/G4 will automatically save a snapshot of the G force. The last snapshot taken is available for viewing directly on the G3/G4. Several possible conditions (e.g. rough turbulence, hard landing, or a steep turn) can trigger this automatic save.

The pilot can set the G force threshold to any value from 0.2 Gs to 2.5 Gs in increments of 0.1 G. The default the value is 1.0 Gs. The most sensitive setting is 0.2 Gs. At this setting the G force must be within plus or minus 0.2 Gs or a snapshot will be saved.

If the G force exceeds the threshold then the G3/G4 will record not only the one value that triggered the capture but also all the sampled values of the G force for a twelve second period. 

This period consists of six seconds before the event and six seconds after the event.

The one hundred plus samples of the G force provide the pilot or AP mechanic with valuable information from both before and after the event. 

The data from the last triggered snapshot is available on a new page entitled “LAST TRIGGERED SNAPHOT”.  The live G force data is displayed on a new page “LIVE DYNAMIC G FORCE”.

These pages display the data graphically so you can tell at glance what is going on without having to wait for the data to get transferred to a computer.

The graphs auto scale based on the G-force threshold-providing maximum zoom for easy viewing.


3

SD CardDo Not Save Flight Data Excel files back on to the SD Card - Save them to your computer!

If you lost the SD card. (Has to be a 2 GB SD card)

Fast track method - Use the SD card that came with your instrument or buy another SD Card from us.

Or do the following

If the file system on your SD card has become corrupted you can reformat the card with the attached utility. Alternatively you can download the latest version from the following site.

http://panasonic.jp/support/global/cs/sd/download/index.html

 

Need format SD Card manual - Click Here


4

Oil  Oil Temperature Probe Placement PDF


5

Insight Warranty

 

a) All warranties begin from Date of Purchase from Insight Instrument.

b) Two Year Warranty - TAS 1000, Strike Finder and TF 500.

c) One Year on G1, Two Year on G2, Three Year on G3-G4

d) One Year Warranty or 1000 Hours (whichever comes first) - Probes/Harnesses/Sensors.

e) 90 Days - Refurbished Units or Repaired Units.

f) Insight Instrument covers outgoing UPS Expedited, shipping services.

g) Warranty coverage’s are determined by the Insight Technician only.

6

Length

 

Aircraft install weight - A G3 for 6 cylinder with 8 foot harness, all sensors, wiring, connectors and probes. - 4.2 Lbs.

Here is a G3 Kit 7


G3 Kit

8

Question

Here's a photo of the aircraft turbo exhaust inlet.
Beech F33A (19xx) with IO-550-B Turbo Flite 550 (turbo normalized).

Installation of the GSeries engine monitor - Need to know TIT probe optimum location.


Answer

 

TIT Location

 

TITTurbine Inlet Probes (TIT)

TIT Probe 7/16" - 20 P/N 2872 Threaded with boss

K-Type thermocouple Red/Yellow in Yellow

 

 

 

 


9

Question

I have the G-3 in my Beech Bonanza IO-550 and sometimes when mixture is leaned, the boxes indicating the # leaned (i.e. L50, L40, L35 etc) are not in same color.  Some are white, blue or black.  What does the difference in color mean?

Answer

During the leaning process as each cylinder peaks the G3 records

- The temperature at which that cylinder peaked.

- The fuel flow rate (FF is the total for all cylinders) at the time that cylinder peaked. This FF rate is displayed just below the top of the EGT bar.

After a cylinder has peaked the FF now is compared with the FF when that cylinder peaked. If the FF now is less than the FF at peak then this cylinder is said to be running lean of peak (LOP). If the FF now is greater than the FF at peak then this cylinder is said to be running rich of peak (ROP).

An L in the box means lean of peak and an R means rich of peak. The number after the L or R is number of degrees that this cylinder is lean of peak or rich of peak.

If the cylinder is running LOP then the outlined box, the letter L, and the number after the L are displayed in white. If the cylinder is running ROP then the outlined box, the letter R, and the number after the R are displayed in cyan (blue).

There is also a user selectable threshold. The default value of this threshold is 25 but the user can select any value between 10 and 150. To set the threshold from the main screen press the SEL button two times. At the bottom of the screen the G3 displays the current threshold. Turn the SEL knob clockwise to increase the threshold or counter-clockwise to decrease it. Press the SEL button a third time to save it.

If the threshold is reached or exceeded then the box changes from an outline to a solid box and the letter L or R and the numbers after it are displayed in black.

If we are below the threshold a white outlined box means lean of peak, a blue (cyan) outlined box means rich of peak.  If we reach or exceed the threshold a solid white box means lean of peak, a solid blue (cyan) box means rich of peak. 

 


 

10

Question 1

 

I downloaded the data and noticed that it looks like the time was set 12 hours off (AM/PM was not set properly).  Is there a way for me to set the time to either the current local time or GMT?

 

Answer

 

The G3 uses a 24 hour clock so there is no actual AM/PM selection but you can change the date and time to whatever you want.

 

Here's how you set the date and time on the G3

 

1. With G3 powered off

2. Press and hold the top button of the G3

3. Turn on the avionics power (do not release the top button yet)

4. After several seconds you can release the top button (you should be on the REGISTRATION CONFIG screen)

5. Turn the top knob (either clockwise or counter-clockwise) until you get to the SET DATE/TIME screen

6. Press the bottom button to select one of the year, month, day, hour, minute, or second (the selected line is YELLOW)

7. Turn the bottom knob to change value of the selected item.

8. Select UPDATE TIME NOW and turn the bottom knob to YES (YES will be RED if selected)

9. Press and hold the bottom button to save the new time (and date).

 

 


 

11

Cessna Carburetor Model MA4-5

Carb temp probe P/N 610C-021 installation instructions.

Here is the manual for the Model MA4-5 Carburetor - Click Here P

 

Here is the location below


carb

 


12

Configuration Page of the G3/G4

 

I was "messing around", on the Configuration Page of the G3 trying to reset the brightness to the maximum setting, (which I assume is 15), but not sure if in the scrolling around of the other settings I did not accidently reset those to less desirable setting.  So find below what my settings show now and please let me know if they sound about right to you.  I own a Beech Bonanza V35B with a non-turbo IO-520BB engine.

 

1)      I have the brightness set to 15 which I assume is the maximum setting?

 

2)      EGT Autorange is ON.  Is this the best setting to get useful EGT information?

 

3)      Autorange Inflection is set at 1100.  (I have no idea what this function is??)User

 

4)      EGT Max.Temp; is a set at 1500, which I think is just fine.  Does this automatically set my CHT to 400?  If not, how can I find what is my CHT alert setting?

 

5)      EGT smoothing; of the four choices it is currently set at 32.  Is this a good setting and what effect do the other settings have on the monitor.

 

6)      FFT Window; is set on the HAMM option.  Again is this the most useful or usual setting and what does HARR and FLAT do to the read outs?  And what is FFT?

 

7)      Preference; has two settings Carb and Tach, and appears to have three options; select Carb, select Tach, or select neither (in which case both Carb and Tach remain yellow).  Is this correct?  I believe it was set up with both Carb and Tach de-selected, (i.e. both yellow).  Since the engine is fuel injected, I assume we don't want Carb selected, but was not sure about Tach?

 

8)      Also, I have noticed a new TAS 1000 Air Data page.  However, so far of all the data on this page, it is only providing the OAT data.  Is the rest going to be functional in a future software update??

First of all, before addressing each individual item, please note that you can restore your G3 to its original factory default settings. Resetting to defaults will not affect things like aircraft registration number, aircraft type, model number, engine type, owner name, phone number etc. It will also not affect things like number of cylinders, number of TITs, injected or carbureted, etc. To restore factory defaults select YES on the FACTORY DEFAULTS line, and then select YES on the SAVE CONFIG line in the REGISTRATION CONFIGURATION screen.

 

1.       The brightness setting is actually a MINIMUM brightness setting. The G3 has an infrared sensor which measures the brightness of the ambient light. The G3 controls the LCD backlight brightness based on current lighting conditions. Adjusting the minimum brightness over rides this automatic feature to prevent the display from going dimmer than your chosen value. The values range from 1 to 15, with 15 being the brightest setting. The default setting is 5.

 

2.       Setting EGT AUTORANGE. With this set to OFF the height of the EGT bars is based entirely on the value of the EGTs. With it set to ON the height of the EGT bars may be stretched to use the height of the screen. Setting this to ON or OFF is a personal preference. It only affects the appearance of the EGT bars on the main screen.

 

3.       AUTORANGE INFLECTION. Here the user specifies the point above which the stretching occurs. Say, for example, that the the inflection point is set at 900 degrees F. Here EGT values below 900 do not significantly affect the EGT bar height but EGT values above 900 do. Again this only affects the appearance of the EGT bars on the main screen. It does not affect the numeric values displayed or the values recorded in the log file.

 

4.       EGT MAX TEMPERATURE. This is unrelated to any cylinder head temperature (CHT) alert setting. The red line for CHTs is fixed at 460 degrees Fahrenheit. If the CHT reaches or exceeds 460 the CHT bar will be displayed in red. The yellow line is currently fixed at 50 degrees below red line. So when the CHT is between 410 and 459 the CHT bar will be displayed in yellow. Below 410 the CHT bar is displayed in green.

 

5.       EGT SMOOTHING. Cylinder head temperatures change very slowly due to what is called thermal mass.  Exhaust gas temperatures (EGTs) on the other hand can change very rapidly. To prevent these numbers from changing so fast that they are not easily readable the G3 smoothes them out by averaging them. You can think of the value chosen as the number of samples in the average. The default is 32.

 

6.       FFT. FFT is an acronym for Fast Fourier Transform which is an algorithm used in the vibration analysis. Here we allow the user to choose one of HAMM, HARR, or FLAT for the FFT window. These refer to Hamming, Blackman-Harris, or flat top window. This is a very technical subject and in most cases the average user does not need to change this. However we make these choices available for the user who is very familiar with FFT. If this is not the case then you can just use the default setting of Hamming. 

 

7.       CARB or TACH preference. On a G3 there is room for six pieces of numeric information at the top two lines of the main screen. If your aircraft is fuel injected then RPM is displayed in the middle of the top line. If your aircraft is normally aspirated then you have the choice of displaying either RPM or CARB temperature in the middle of the top line. On line 7 of the user configuration screen you specify your preference. Your choice is displayed in RED. On all lines that provide a choice of two or more items, the user has the option of selecting any one of them, or selecting none of them. If he selects one his choice will be displayed in RED. If he selects nothing the entire line will be either GREEN or YELLOW depending on whether or not the line is selected. If the user does not specify a choice the G3 will use a default value. If the aircraft is fuel injected the default value will be to display RPM. If the aircraft has a carburetor the default value will be to display CARB temperature. 

 

8.       TAS1000 page. This page has been functional since August 2012 in software version 217. It displays a subset of the information received from a TAS1000 or comparable air data computer. If you don’t have one of these connected your G3 cannot display the missing information.

 


 

13

NOTE: To check brightness, use incandescent light source to shine on GSeries instrument face.

LED and fluorescent will not work because of the lack of infrared in the beam.
LED and fluorescent have narrow wavelength - See charts

Chart

 


14

Your G3/G4 was preset at factory with your usable total fuel

 To reach FUEL TOTALIZATION page

Turn the PG knob clockwise or counterclockwise until you get to the FUEL ONBOARD page.

The INITIAL FUEL line should be active. This is indicated by displaying the words INITIAL FUEL in YELLOW.

  

Set total fuel onboard before take-off

1- Push SEL button to highlight INITIIAL FUEL to yellow

2- Turn SEL knob to set gallons

3- Push SEL knob again to highlight SAVE & EXIT to yellow

4- Turn SEL knob to highlight YES from yellow to red

5- Push SEL button to save and FUEL TOTALIZATION page will appear

    

On next take-off if no fuel was added

1- Push SEL button to highlight INITIIAL FUEL to yellow

2- Push SEL knob again to highlight SAVE & EXIT to yellow

3- Turn SEL knob to highlight YES from yellow to red

4- Push SEL button to save and FUEL TOTALIZATION page will appear

 

If fuel was added set new total fuel

1- Push SEL button to highlight INITIIAL FUEL to yellow

2- Turn SEL knob to set total gallons

3- Push SEL knob again to highlight SAVE & EXIT to yellow

4- Turn SEL knob to highlight YES from yellow to red

5- Push SEL button to save and FUEL TOTALIZATION page will appear

Fuel  Fuel

15

G2-3-4 Buss Voltage

The G2-3-4 Buss Voltage attempts to display the buss voltage in green when it’s normal and red when it’s outside of normal. In an aircraft with a 12V electrical system the Buss Voltage will be annunciated in green so long as the voltage is 12.0V to 14.9V (inclusive).

In an aircraft with a 24V electrical system the Buss Voltage will be annunciated in green so long as the voltage is 24.2V to 28.7V (inclusive). Below this range the alternator isn’t charging the battery and above that it’s overcharging, and the Buss Voltage will be annunciated in red.

The instrument must be connected to the main voltage buss (not in series with something else, on a lighting buss, etc) and must have a good low-resistance ground connection, otherwise the voltage measurement itself will be in error causing the Buss Voltage to indicate in red erroneously.


16

NOTE: For GPS interface you must have software Version UPDATE: 185 or higher in G3

 

NOTE: Please refer to your GPS MANUAL for correct pin outs and connection information (PIN 57 for 430)

 

EXAMPLE - INSTRUCTIONS FOR GARMIN 430 SERIES SOFTWARE SET UP:

 

rs2321)  To start set up mode.

          Press and hold “ENT” button and apply power.

          Hold “ENT” until the display lights up.

          Release “ENT” button, wait until display says OK

          Press “ENT” button once.

2)  Turn inner rotary knob until  “Main RS-232 Config” appears.

3)  Use cursor and “ENT” button to select.

4)  Press cursor button to select input for channel 1

                                     

                                       INPUT                            

      Channel 1            Shadin - fadc                     

 

5) Turn power off.

 


17

To view and graph your G3/G4 logged vibration data this Excel file will help.

 

Click on Excel file and follow instructions.

 

G3 Graph

 

Insight G3/G4 Vibration Log Graph Tool (V1.14) - Click Here

 

18

Video2 G 2-3-4 "How To" Graph Your Flight Data Video - Click Here  

 


19

1. On the Configuration page, there is a line for "FFT," with three possible settings. I'm assuming this setting concerns the vibration page and use of the Fast Fourier Transform algorithm? I've poured through the installation and operating manuals and cannot find any information about this setting, what it does, or how to optimize it for my aircraft. Please advise!


Answer: Re: Question1.   You are right. This does refer to the use of the Fast Fourier Transform algorithm on the vibration page. Specifically it allows the user to choose one of HAMM, HARR, or FLAT for the FFT window. These refer to Hamming, Blackman-Harris, or flat top window. This is a very technical subject and in most cases the average user does not need to change this. However we make these choices available for the user who is very familiar with FFT. If this is not the case then you can just use the default setting of Hamming.   However if you do choose to experiment with the three possibilities then you should be careful not to compare apples with oranges. In other words if you are trying to compare an FFT graph from today’s flight with a graph from last week, last month, or last year then both should be using the same function.   Here is a link to an article on the web if you are inclined to read more about the window function in digital signal processing.  http://en.wikipedia.org/wiki/Window_function


2. Although my mixture is properly adjusted and in the full rich position during takeoff and initial climb, I will sometimes get a fuel flow indication in the bar of my #4 cylinder - and this is before I ever touch the mixture! Moreover, I cannot seem to clear this out by pressing and holding the "Select" button. After a leaning cycle, cylinders 1-3 will clear out, but 4 will often not. 


Answer: Re: Question 2.   When the exhaust gas temperature (EGT) of any given cylinder peaks the G3 saves the fuel flow rate (FF) at the instant that this cylinder peaked. It saves a value for each of the cylinders.  This is used later to determine if a cylinder is rich of peak (ROP) or lean of peak (LOP). If the FF now is less than the FF when this cylinder peaked then this cylinder is running LOP. Similarly if the FF now is greater than the FF when this cylinder peaked then this cylinder is running ROP.  In addition to saving this FF value the G3 also displays the FF just below the top of the EGT bar.  This lets the pilot know what the fuel flow rate was at the instant this cylinder peaked. This is displayed as long as the height of the EGT bar has exceeded some threshold value.   From your log file I did notice that EGT4 is usually hotter than the other three.  See chart below.

 

FAQ1

It is not unusual to have some difference between cylinders for EGT measurements.   The temperature sensed depends on the position of the actual probe. Some are more exposed than others to the hot exhaust gases. Maybe because EGT4 is reading hotter than the others could be the reason you are seeing FF on EGT4 but not on EGT1 to EGT3.    If you see FF on the EGT bar for cylinder #4 this is normal. If you don’t see FF for cylinders 1, 2, and 3 this could be because the height of these EGT bars is below the threshold. You can try manually increasing the height of the EGT bars to make them a bit higher than the CHT redline. To do this press the bottom button once and then turn the bottom knob clockwise.  I think if you do this you will see FF for all 4 cylinders. Please let me know if this works.   By the way, pressing and holding the bottom button erases the RICH/LEAN boxes but it is not supposed to erase the FF displayed below the top of the EGT bar.

 


20

 

G3 Trouble-shooting

The following is a compilation of the common symptoms and causes of problems which may be experienced with the GEM Systems. Close examination of these symptoms should assist in identifying the cause of the problem.

Symptom: The G3 series Display does not illuminate.
Cause: No ground return at Pin 15, of the edge connector either from the engine case or from airframe ground

Symptom: The G3 series Display does not illuminate.
Cause: Voltage is missing at Pin S, of the edge connector from the circuit breaker or bus.

Symptom: One or more columns will not illuminate.
Cause: Try recycling power to check the Display. If all columns do not illuminate, the GEM series display has been damaged or is inoperative.

Symptom: One or more columns will not illuminate. 
Cause: Check the probe connections, the display will blank columns with poor EGT and CHT connections. Columns 5 and 6 shouldn’t illuminate on a 4 cylinder engine. 
Turn top knob on G3 to the probe analysis page to check probe Integrity. For 8 foot harness on probe analysis page resistance should be 8 - 3 EGT / 1 - 6 CHT For 24 foot harness on probe analysis page resistance should be 26 - 10 EGT / 4 - 18 CHT

Symptom: No EGT in one or more columns.
Cause: Errors in harness wiring. Visually check probe connections and polarity. Check for probe continuity at the display connector. The resistance of the lead wire is approximately 1 ohm per foot. Take extreme care to not damage the connector terminals with the meter probes. Turn top knob on G3 to the probe analysis page to check probe Integrity.


Symptom: No CHT in one or more columns.
Cause: Errors in harness wiring. Visually check probe connections and polarity. Check for probe continuity at the display connector. The resistance of the lead wire is approximately 1 ohm per foot. Take extreme care to not damage the connector terminals with the meter probes. Turn top knob on G3 to the probe analysis page to check probe Integrity.

Symptom: No CHT in one or more columns.
Cause: Faulty probe. Turn top knob on G3 to the probe analysis page to check probe Integrity. For 8 foot harness on probe analysis page resistance should be 8 - 3 EGT / 1 - 6 CHT For 24 foot harness on probe analysis page resistance should be 26 - 10 EGT / 4 - 18 CHT

Symptom: No CHT in one or more columns.
Cause: Faulty probe. Turn top knob on G3 to the probe analysis page to check probe Integrity. For 8 foot harness on probe analysis page resistance should be 8 - 3 EGT / 1 - 6 CHT For 24 foot harness on probe analysis page resistance should be 26 - 10 EGT / 4 - 18 CHT

Symptom: Display goes out during engine start.
Cause: Voltage transient or over voltage condition. The display should not be turned on during engine start. An Avionics Master or separate power switch should be installed to apply power to the display.

Symptom: Display is unstable.
Cause: Noisy or defective magneto or ignition harness. Check operation on left and right magnetos. The temperature should rise slowly and may stabilize slightly or completely on one or the other magneto. Single magneto operation will pinpoint the problem to one ignition harness, unless both are faulty. Verify that the probe wires and GEM series system harness are isolated from the ignition harness. If necessary, repair or replace the faulty ignition harness to eliminate ignition related interference.

Symptom: Display is unstable.
Cause: Magneto ungrounded or defective P-lead. Check ignition harness for proper shielding, grounding, and loose spark plug caps. Check magnetos for proper grounding or evidence of arcing. Disconnect magneto P-leads one at a time. If this eliminates or reduces the problem, replace the P-lead. A faulty ignition harness will typically cause all EGT readings to "dance" up and down. The GEM series Display will detect this type of fault long before standard test methods, thus eliminating the potential of more serious problems.

Symptom: Display is unstable.
Cause: Noisy or defective alternator, defective generator or faulty ground connection. Try operation with alternator or generator off.

Symptom: Display is affected by radio transmissions.
Cause: Proximity of probe and/or display unit to the radio power wiring and away from radios and antenna coax. Check radio rack connector for missing 50 ohm matching device. The 50 ohm matching device is a thick washer-like component part that is installed underneath the connector end cap. The end cap will have to be unsoldered to check for the matching device. This seemingly unimportant component is supplied with all connectors and is required for proper operation of the connector. Utilize shielded-twisted pair for power leads.

Symptom: EGT indication is not uniform.
Cause: The EGT indication for a fuel-injected engine will typically vary a bar or two from perfectly uniform when leaned for cruise. Clean the fuel injection nozzles. Non-uniformity is normal in carbureted engines. All cylinders are measured by the same circuitry. It is almost impossible to not have identical response on all channels of the GEM series.

Symptom: A sudden or gradual reduction in the EGT indication can be symptomatic of several engine faults.
Cause: Exhaust leaks above the probe and poor compression due to bad rings, valves or valve guides. If a probe substitution does not reveal a faulty probe, check for mechanical faults in the engine. Consult the GEM series Pilot’s Guide for more detailed engine diagnostic information.

Symptom: All EGT readings too high.
Cause: Readjust the EGT "BAR HEIGHT" on the Display. Use DVM a (digital voltmeter) to measure the difference between the Display ground and engine block ground with the engine running and the battery charging. If the difference is greater than or 2 V DC with the alternator charging, remove the G3 series ground and provide an extension directly to the engine block. If this solution fixes the problem, a ground fault exists between the engine and air-frame which should be remedied.

Symptom: Display indicates full scale or blanks out.
Cause: This can be symptomatic of an intermittent ground fault between engine and air-frame. See "All EGT readings too high".

 

21

The GEM's wiring harnesses should be positioned away from sources of high energy, such as ignition harnesses, magnetos,P-leads, alternator wiring and high frequency radio wiring and antennas.

22

WARNING about installing probes

The minimum radius of bends in wire groups or bundles must not be less than 10 times the outside diameter of the largest wire or cable, except that at the terminal strips where wires break out at terminations or re-verse direction in a bundle. Where the wire is suitably supported, the radius may be 3 times the diameter of the wire or cable. Where it is not practical to install wiring or cables within the radius requirements, the bend should be en-closed in insulating tubing. The radius for thermocouple wire is 20 times the diameter.

 

Bend

Over bending voids warranty.

Bent Probe

 

 

23

The first thing to troubleshoot is do I have a good ground?

How is my ground strap?

 

Good Ground Strap

Example of good ground strap

 

Bad ground strap

Example of a bad ground strap

 

If your ground strap is similar to the top picture enjoy your new G Series Engine Monitor.

If your ground strap is similar to the bottom picture you will be talking to Insight tech support.


24

If you are having erratic fuel flow or any other function other than EGT, CHT or TIT’s please take time to inspect the wiring in the D sub connector on back of G Series monitor.

 

Harness

Example of good job

 

Dsub

 Come on, smarten up!!!


25

Open 

If upgrading from a previous GEM be sure to install the supplied “snap-on” ferrite suppressor over the unshielded wires.


26

Bad

 

Do NOT ground the G Series monitor or any other instrument to a painted panel – Run a separate ground wire to a CLEAN airframe ground.

 

Do NOT ground any electrical device to the G Series instrument case as shown above.
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