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Laversab 6250 User Manual

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505 Gillingham Lane
Sugar Land, TX 77478
O: (281) 325-8300
F: (281) 325-8399
E: aservice@laversab.com
MODEL 6250 Rev. A2
USER'S MANUAL
Date: February 21, 2020
Document Number: 125-9102A2

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  • Page 1 505 Gillingham Lane Sugar Land, TX 77478 O: (281) 325-8300 F: (281) 325-8399 E: aservice@laversab.com MODEL 6250 Rev. A2 USER'S MANUAL Date: February 21, 2020 Document Number: 125-9102A2...

  • Page 2: Warranty

    6250 User’s Manual WARRANTY Laversab Inc., warrants its products to conform to or exceed the specifications as set forth in its catalogs in use at the time of sale and reserves the right, at its own discretion, without notice and without making similar changes in articles previously manufactured, to make changes in materials, designs, finish, or specifications.

  • Page 3: Copyright Notice

    6250 User’s Manual COPYRIGHT NOTICE Copyright (c) 2020 by Laversab Inc. All rights reserved. The content of this manual may not be reproduced in any form by any means, in part or in whole, without the prior written permission of Laversab Inc.

  • Page 4: Revision History

    6250 User’s Manual REVISION HISTORY Document No. Release Date Description 125-9102A 08/15/2014 6250 User’s Manual, Rev.A 125-9102A2 02/21/2020 6250 User’s Manual, Rev.A2 125-9102A2 Page 4...

  • Page 5: Warning

    6250 User’s Manual WARNING THE 6250 USES LINE VOLTAGES FOR ITS OPERATION WHICH ARE POTENTIALLY DANGEROUS. IMPROPER OPERATION OF THIS EQUIPMENT MAY RESULT IN PERSONAL INJURY OR LOSS OF LIFE. HENCE THE EQUIPMENT DESCRIBED IN THIS MANUAL SHOULD BE OPERATED ONLY BY PERSONNEL TRAINED IN PROCEDURES THAT WILL ASSURE SAFETY TO THEMSELVES, TO OTHERS AND TO THE EQUIPMENT.

  • Page 6: Table Of Contents

    SECTION 1 : INTRODUCTION ....................8 SECTION 2 : CONTROLS & CONNECTIONS ................. 11 MAIN UNIT, TOP PANEL .................... 11 REMOTE UNIT ......................16 SECTION 3 : OPERATING THE 6250 ..................18 START-UP ........................18 MAIN OPERATING SCREEN ..................19 CHANGING UNITS ...................... 25 CHANGING TARGET VALUES ..................
  • Page 7 SECTION 5 : TYPICAL USE ....................... 73 SECTION 6 : CALIBRATION ...................... 76 EQUIPMENT ........................76 6250 TRANSDUCERS ....................76 SETUP OF 6250 ....................... 77 CALIBRATION PROCEDURE ..................78 VERIFICATION PROCEDURE ..................81 SECTION 7 : MAINTENANCE ....................86 SECTION 8 : RS232 SERIAL INTERFACE ................. 87 COMMUNICATION SETUP ..................

  • Page 8: Section 1 : Introduction

    The user has the ability to program into the 6250 a profile of set-points to be controlled in a sequence. Once such a profile has been setup, the user can command the unit to move from one set-point to the next simply by using the Up-arrow key.
  • Page 9 6250 User’s Manual Figure 2.1(A) : 6250 Top Panel 125-9102A2 Page 9...
  • Page 10 6250 User’s Manual Figure 2.1(B) : 6250 Top Panel with optional removable external battery pack 125-9102A2 Page 10...

  • Page 11: Section 2 : Controls & Connections

    Figure 2.1(A) and 2.1(B) shown on previous two pages. AC INPUT connector : This is a 3-pin male circular connector. A power cord is provided with the 6250. The circular connector end of the power cord needs to be connected here.
  • Page 12 Emergency Vent Valve, "Pitot Cross-bleed" : In the event that the 6250 is in-operable due to a malfunction or due to loss of power, it is possible to vent the Pitot system manually. This is done using the metering valve labeled “Cross-bleed”.
  • Page 13 Emergency Vent-Valve, “Static Vent”: In the event that the 6250 is in-operable due to a malfunction or due to loss of power, it is possible to vent the Static system manually. This is done using the metering valve labeled “Static Vent”.
  • Page 14 6250 User’s Manual performing the Self Test on the 6250. The hose, once connected, must not be disconnected while the aircraft Pitot system is not at “Ground” level. Caution: Do not connect the Pitot hose to the Pitot port before performing the Self Test.
  • Page 15 6250 User’s Manual For more details on downloading profiles, please refer to Section 4. For more details on communication with the 6250, please refer to Section 8. The pin-out of this connector is provided in Appendix C. [13] Encoder interface connector: This connector is accessed by opening the “Interface Connectors”...

  • Page 16: Remote Unit

    6250 User’s Manual REMOTE UNIT Figure 2.2 : Remote Unit Please refer to Figure 2.2 which shows the front-view of the Remote unit. LCD Display: The Remote unit has a 5.8 inch Color TFT display with a resolution of 640 x 480 pixels.
  • Page 17 , is used to either turn-On or turn-Off the 6250. When the Remote unit is Off and the Ready LED is On, pressing the Power key for 2 to 3 seconds will turn-On the 6250. The display takes another 2 seconds to come on. The...

  • Page 18: Section 3 : Operating The 6250

    6250. After understanding these details, the user should refer to the ‘Typical Use’ chart shown in Figure 5.1, which outlines a step-by-step process of using the 6250 with an aircraft. START-UP ...

  • Page 19: Main Operating Screen

    6250 User’s Manual Figure 3.1: Main operating screen MAIN OPERATING SCREEN Please refer to Figure 3.1. There are 17 different items (indicated in red) shown on this screen. Numbers 1 to 7 on the left side, refer to the Pitot-ouput parameters. Numbers 8 to 14 on the right side, refer to the Static-output parameters.
  • Page 20 6250 User’s Manual Note: Qc units display differential pressure with respect to Static pressure. Pt units display absolute Pitot pressure. Selecting the desired Pitot units is described in Section 3.3. Pitot Actual value The Actual value (actual pressure converted to selected units) being measured or controlled at the Pitot output is displayed here in the selected Pitot units.
  • Page 21 The target value that the user desires to achieve on the Pitot output is displayed here. When the Pitot output is in Control mode, the 6250 will automatically adjust the Pitot Actual value to match the Pitot Target value. The resolution of the Pitot target value is the same as the resolution of the Pitot Actual value.
  • Page 22 Pitot-Rate Target value. That is, if the Pitot-Rate target is set to 150 knots/min, and the airspeed (Pitot) target is changed from 25 knots to 100 knots, the 6250 will ramp the airspeed at a rate of 150 knots/min, taking roughly 30 seconds to move from 25 knots to 100 knots.
  • Page 23 The target value that the user desires to achieve on the Static output is displayed here. When the Static output is in Control mode, the 6250 will automatically adjust the Static Actual value to match the Static Target value. The resolution of the Static target value is the same as the resolution of the Static Actual value.
  • Page 24 How to change modes is described in Section 3.6. [15] Power status When AC power is connected to the 6250, the icon which shows the power plug (with ‘AC’ shown to the left of the icon), is displayed here. 125-9102A2...

  • Page 25: Changing Units

    6250 User’s Manual If the internal battery is connected, the battery icon is displayed here, along with the percentage charge remaining in the battery. When the battery charge goes below 10%, the percentage charge value turns red and starts blinking, until AC power is connected to the unit.
  • Page 26 6250 User’s Manual Pitot units Pitot units can be changed only if the key# symbol is displayed to the left of the Pitot units field. Press key ‘ ’ on the keypad and the Lower section of the display will appear as shown below.
  • Page 27 6250 User’s Manual Figure 3.4 : Select QcinHg Static units Static units can be changed only if the key# symbol is displayed to the right of the Static units field. Press key ‘ ’ on the keypad and the Lower section of the display will appear as shown in Figure 3.5 below.

  • Page 28: Changing Target Values

    6250 User’s Manual the ‘Static units’ screen, press ‘ ’. The Lower section will blank out and the Upper section will appear as shown in Figure 3.6 below. The fields for Static units, Static target and Static-Rate target will be blinking. The Actual and Target values will be based on the selected unit.
  • Page 29 6250 User’s Manual Figure 3.7 : Pitot Target value Use the keypad to enter the desired value in the field shown. To clear an entry, press CLR. To accept the entry, press ENTER. To exit this screen without changing the Target value, press CANC.
  • Page 30 6250 User’s Manual In this screen, the Upper section has a new symbol (with Up & Down arrows) to the left of the Pitot Target value field. This indicates that the Pitot Target value can be jogged up or down repeatedly, in steps of 1 knot, using the Arrow keys, until CANC pressed.
  • Page 31 6250 User’s Manual Figure 3.9 : Static Target value Use the keypad to enter the desired value in the field shown. To clear an entry, press CLR. To accept the entry, press ENTER. To exit this screen without changing the Target value, press CANC.

  • Page 32: Changing Rate Target Values

    6250 User’s Manual In this screen, the Upper section has a new symbol (with Up & Down arrows) to the right of the Static Target value field. This indicates that the Static Target value can be jogged up or down repeatedly, in steps of 1 foot, using the Arrow keys, until CANC pressed.
  • Page 33 6250 User’s Manual Figure 3.11 : Pitot Rate Target value Use the keypad to enter the desired value in the field shown. To clear an entry, press CLR. To accept the entry, press ENTER. To exit this screen without changing the Rate Target value, press CANC.
  • Page 34 6250 User’s Manual Figure 3.12 : Jog the Pitot Rate Target value In this screen, the Upper section has a new symbol (with Up & Down arrows) to the left of the Pitot Rate Target value field. This indicates that the Pitot Rate Target value can...
  • Page 35 6250 User’s Manual mbar/min psi/min 0.01 mmHg/min kpa/min 0.01 Static Rate Target value The Static Rate Target value can be changed only if the key# symbol is displayed to the right of the Static Rate Target value field. Press key ‘...
  • Page 36 6250 User’s Manual Figure 3.13 above, pressing the Up-Arrow key will make the screen appear as shown in Figure 3.14 below. Figure 3.14 : Jog the Static Rate Target value In this screen, the Upper section has a new symbol (with Up & Down arrows) to the right of the Static Rate Target value field.

  • Page 37: Changing Modes

    6250 User’s Manual mbar/min psi/min 0.01 mmHg/min kpa/min 0.01 CHANGING MODES Note: On power-up, both Pitot and Static are in Measure mode. Pitot Mode The Pitot mode can be changed when the key# symbol is displayed to the left of the Pitot mode field.
  • Page 38 6250 User’s Manual Pitot Leak mode and stop ‘Leak’ from blinking. Pressing CANC will revert back to Pitot Measure mode. For now, press CANC and return Pitot to Measure mode. Press ‘ ’ to select Pitot mode again. Then press ‘...
  • Page 39 6250 User’s Manual Figure 3.18 : Select Static Mode Press the key with the # (shown in blue) associated with the mode to be selected. Press ‘ ’ to select Leak mode. The screen appears as shown in Figure 3.19 below.

  • Page 40: Measure To Control Transition

    Since the controlling portion of the 6250 is isolated from the output during Measure or Leak modes, it will usually be at a pressure quite different from that at the output. Simply introducing the controlling section into the pneumatic system connected to the output will cause a surge in pressure at the output.

  • Page 41: Leak Checks

    Leak checks can be performed either independently or simultaneously on the Pitot and Static outputs of the 6250. The ideal way to perform leak checks is to put only one output in Leak mode while keeping the other output in Control mode. However, if necessary, both outputs can be simultaneously put into Leak mode.
  • Page 42 6250 User’s Manual Figure 3.21 : Pitot Leak (start) At the end of one minute, the screen will appear similar to Figure 3.22 below. Figure 3.22 : Pitot Leak (1-min) At the end of two minutes, the screen will appear similar to Figure 3.23 below.
  • Page 43 [12] Average per-minute leak rate over 3 minutes When CANC is pressed to exit out of Leak mode, the 6250 automatically goes back to Control mode. Instant Pitot leak rate: While the leak-check is going on, the Actual values are still updated every 250 msec in the Upper section of the screen.
  • Page 44 Excessive Pitot Leak: If the ‘instant’ leak-rate exceeds 50 knots/min, to protect the aircraft instruments, the 6250 will automatically put Pitot back into Control mode and abort the leak check. An error message: ERR 7: Pitot leak excessive.
  • Page 45 6250 User’s Manual The Lower section of the screen will appear similar to Figure 3.25 below. The parameters shown in the Leak screen are explained below, after Figure 3.28. Figure 3.25 : Static Leak (start) At the end of one minute, the screen will appear similar to Figure 3.26 below.
  • Page 46 [10] The Actual value at the end of 3 minutes [11] Total leak in 3 minutes [12] Average per-minute leak rate over 3 minutes When CANC is pressed to exit out of Leak mode, the 6250 automatically goes back to Control mode. 125-9102A2 Page 46...
  • Page 47 Excessive Static Leak: If the ‘instant’ leak-rate exceeds the Target Static rate (factory-set at 2000 feet/min), to protect the aircraft instruments, the 6250 will automatically put Static back into Control mode and abort the leak check. An error message: ERR 8: Static leak excessive.

  • Page 48: Self-Test Function

    6250 User’s Manual SELF-TEST FUNCTION The Self-Test must not be performed when the tester is connected to the aircraft. Therefore, it is up to the user to run the Self-Test after ensuring that both Pitot and Static outputs are open to ambient (close to “Ground”) and Both Pitot and Static outputs are in Measure mode.

  • Page 49: Go-To-Ground Function

    This function is typically used in two situations. First, just after connecting to the aircraft when the user wants to put the 6250 into Control mode and control at “Ground” before proceeding further. Second, when all tests on the aircraft are completed and the user wants to ensure that the outputs are close to “Ground”...

  • Page 50: Hold Function

    6250 to perform the operations described above. HOLD FUNCTION This function needs to be used only if the user wants to “Pause” while the 6250 is ramping from one target to another. This function is valid only when one or both outputs are in Control mode.

  • Page 51: Other Functions

    6250 User’s Manual 3.10 OTHER FUNCTIONS There are several other functions available on the 6250 that can be accessed by pressing FUNC key. These are explained in the sub-sections below. The functions available are: 1. View Limits 2. Modify Limits 3.

  • Page 52: Modify Limits

    6250 User’s Manual Figure 3.35 : View Limits The details of each limit are provided in Section 3.10.2 (Modify Limits). 3.10.2 MODIFY LIMITS The seven user-programmable limits can be modified by selecting ‘ ’ in the Functions menu. Access to the ‘Modify Limits’ function is protected by means of a password. The following screen will appear.
  • Page 53 6250 User’s Manual To modify a specific limit value, press the number-key for that limit. If ‘ ’ is pressed to modify the ‘Max knots’ limit, the screen will appear as below. The last line of the display will show the upper and lower bound of the value that may be entered. Other limit values can be modified similarly.

  • Page 54: Adjust Display Brightness

    8 parameters that are usually entered by the user (units, target values, modes). The 6250 can store up to 15 profiles in its non-volatile memory. Profile number 15 is factory-installed. It is a short, modified version of the FAR 91.411.
  • Page 55 6250 User’s Manual Figure 3.40 : Run Profile (enter profile number) Enter the Profile number. In this case, enter ’15.1’ followed by ENTER. This will bring up point 1 of profile 15. (To run profile number 1, starting at point 1, you would enter ‘1.1’.
  • Page 56 6250 User’s Manual In the Lower section, the profile number (15.1) will be blinking (waiting for CANC). The name of the profile ’91.411 short’ is displayed to the right of the profile number. Do NOT press or CANC. Instead, press the...
  • Page 57 6250 User’s Manual Wait for the 6250 to achieve the targets set in 15.1. The screen will appear as shown below. Figure 3.43 : Run Profile (15.1 Achieved) Now press Up-Arrow to move to 15.2, which will be blinking. Press GO. Wait for targets to be achieved.

  • Page 58: Load Profile

    6250. A serial cable and a USB-to-Serial converter are included with the unit. A profile is loaded from the PC using Hyperterminal (see Section 4 for details). Before loading profiles, the 6250 needs to be setup to accept the profiles. This is done by 5’...

  • Page 59: Height Correction

    Note: The Height correction is always reset to zero on power-up. If the Static ports on the aircraft are significantly higher than the location of the 6250 during testing, it may be necessary to correct for this difference in height. This is done using the ‘Height Correction’...

  • Page 60: Set Leak Timers

    6250 User’s Manual Figure 3.47 : Height Correction confirmation Unless the location of the tester is higher than the location of the Static ports on the aircraft, the value entered is usually a positive number. 3.10.7 SET LEAK TIMERS Note: Timer values are maintained through a power cycle.

  • Page 61: Calibration (Preliminary)

    3.10.8 CALIBRATION (PRELIMINARY) Section 6 provides details on calibration of the 6250. Before selecting the calibration function it is necessary to set Pitot units to ‘QcinHg’ and the Static units to ‘inHg’. Also, both outputs must be in Measure mode. If this is not set up correctly and Function ‘...
  • Page 62 Next calibration due: This is the date (‘mm/dd/yy’ format) that the next calibration is due for the 6250. This date is also updated each time the 6250 is calibrated. Other details of the calibration procedure are provided in Section 6.

  • Page 63: Encoder

    An altimeter-encoder can be connected to the ‘Encoder’ interface connector on the top panel of the 6250. The pin-out of the Encoder interface is provided in Appendix C. When an Encoder is connected, Function ‘9’ shows the 10-bit Gray code that is generated by the Encoder at a specific altitude.

  • Page 64: Battery Operation

    Otherwise, allow the test to continue until the final target altitude is reached. Note: The power supplied on the Encoder interface connector of the 6250 is +12 Volts DC. If the encoder being tested requires a different voltage, it will need to be supplied externally.

  • Page 65: Leak-Checking The 6250

    6250 User’s Manual The battery can be recharged simply by connecting AC power to the 6250 and turning On the AC On/Off switch. It is not necessary to turn On the Battery On/Off switch during charging. Internal fans and ventilating fans will operate during the charging process. The red “Charging”...
  • Page 66 Step 5, after further tightening the caps on the output ports. 11. If the leak-rates continue to exceed the maximum allowed, the unit may need to be repaired. 12. Go-to-Ground. Reset the Leak-Timers to their original values. Turn Off the 6250. 125-9102A2 Page 66...

  • Page 67: Section 4 : Profiles

    WHAT IS A PROFILE A profile is a set of up to 50 points that tell the 6250 what you would want it to do at each point. Each point consists of 8 parameters: 1) Pitot units, 2) Pitot mode, 3) Pitot target value, 4) Pitot Rate target value, 5) Static units, 6) Static mode, 7) Static target value and 8) Static Rate target value.
  • Page 68 Static Rate target value In the sample profile, Row 3, which is the first point in the profile, tells the 6250 to go in Control mode to 100 knots at 150 knots/min on the Pitot side, and in Control mode to 0 feet at 6000 feet/min on the Static side.

  • Page 69: Creating A Profile

    Limit is 12 characters. On Row 2, middle cell, replace “11” with a profile number between 1 and 15 that you would like this profile to be saved as, in the 6250. Do not change row 2 right-most cell. In rows 3 through 50, change the cells as per the points you want to generate in your test.
  • Page 70 6250 User’s Manual Digits after decimal Pitot units Comment Pitot Rate Pitot target target knots Mach Rate is in knots/min km/hr Rate is in km/hr/sec Pt inHg Qc inHg Pt mbar Qc mbar Pt psi Qc psi Pt mmHg Qc mmHg...

  • Page 71: Setting Up Hyperterminal

    .txt file, both with the same filename. Your profile has been created. SETTING UP HYPERTERMINAL You load a profile into the 6250 using the Hyperterminal program. At first you need to setup Hyperterminal. You only need to do this once.

  • Page 72: Loading Profiles

    GO on the 6250. Check that the profile loaded properly by selecting Function 4 on the 6250 and entering the profile number starting at step 1 (i.e. “15.1” to check profile 15). Step through the profile using only the Up-Arrow key and check if the points match what you have setup on the PC as your profile.

  • Page 73: Section 5 : Typical Use

    Pitot and the Static ports, even if the check is being done on only Pitot or Static. Do NOT connect the hoses to the 6250 at this moment. 2. Set the “Baro Adjust” on the aircraft to 29.92 inHg or 1013.25 mbar or “Standard”.
  • Page 74 Ground and go through the leak-check process shown above, to find and fix the leak before proceeding further. It may be helpful to keep a copy of the procedure, shown in Figure 5.1, with the 6250 to assist the operator while using the 6250.
  • Page 75 Set the BARO adjust on the aircraft to 29.92 or 1013.25 or 760 mmHg or Standard. STEP 1: PREP 6250 & SELF TEST 1.1 Turn ON 6250. Check / adjust leak timers. Set Pitot Rate and Static Rate target values 1.2 Open Pitot and Static ports on 6250 to ambient. Close Vent valves.

  • Page 76: Section 6 : Calibration

    6250 TRANSDUCERS Pitot Transducer The Pitot output of the 6250 has a differential transducer with a range of 0 to 15 inHg differential. The differential pressure is measured with the pressure at the Static output as the reference. This transducer must be calibrated at 0 inHg differential and 15 inHg differential (with respect to Static).

  • Page 77: Setup Of 6250

    6250 User’s Manual SETUP OF 6250 To perform a calibration press FUNC and then select ‘ ’. However, before selecting the calibration function it is necessary to set Pitot units to ‘QcinHg’ and the Static units to ‘inHg’. Also, both outputs must be in Measure mode. If this is not set up correctly and Function ‘...

  • Page 78: Calibration Procedure

    Figure 6.3 : Calibration (Main) Connect the differential-pressure output (QcinHg) of the Pressure Standard to the Pitot output of the 6250. Connect the absolute-pressure output (PsinHg) of the Pressure Standard to the Static output of the 6250. The calibration adjustment requires generating two differential pressures at the Pitot output and two absolute pressures at the Static output.
  • Page 79 3. Generate exactly QcinHg=0.000 and PsinHg=1.600. Wait for a minimum of 5 minutes to allow temperature effects to stabilize. 4. Note (on the calibration report, not on the Remote unit) the 6250’s Static Actual value as the “As Found” value for the Static vacuum point. (See Figure 6.10) 5.
  • Page 80 ‘32.000’. Press to return to the point-selection screen (Figure 6.3). You should see ‘32.000’ on this screen, as the Static full-scale point. This indicates to the 6250 that the absolute pressure on the Static output is currently exactly 32.000 inHg. 125-9102A2...

  • Page 81: Verification Procedure

    To do this, it is necessary to send the non- linearity offsets from a PC to the RS232 serial port on the 6250, using a program similar to Hyperterminal. Details of this setup are provided in Section 8.1.
  • Page 82 CP=xxxxxx followed by ENTER, where ‘xxxxxx’ is the calibration password. If the password is correct, the 6250 will echo back a ‘0’. This completes the setup required for entering the non-linearity offsets, which will be entered at various points in the verification process detailed below.
  • Page 83 6250 would be: S1=-0.002 followed by ENTER At point 2, if the 6250 Static Actual value is 3.201, the offset value will be (3.201 – 3.200 = 0.001), and the command sent to the 6250 would be: S1=0.001 followed by ENTER If the commands are sent correctly, the 6250 will echo back ‘0’.
  • Page 84 6250 User’s Manual increments. Although the offsets for the 5% points are never entered, these values are interpolated based on the 10% offset values. Please bear in mind that the offsets displayed may not match what you entered in step 3 above. This is because the entered value is added to the existing value already stored in the 6250.
  • Page 85 6250 User’s Manual Model: 6250 Serial#: 82678 Full scale: Static: 32 inHg Pitot: 15 QcinHg (differential) Last Calibrated date: 08/15/14 ___________________________________________________________________________ CALIBRATION RESULTS STATIC OUTPUT TEST POINT AS FOUND AS LEFT DEVIATION inHg inHg inHg 1. Vacuum 1.601 1.600 0.001 2.

  • Page 86: Section 7 : Maintenance

    6250 includes calibration once a year. The calibration procedure is described in Section 6. Calibration of the 6250 must be done only at an Authorized Calibration Center. Other than annual calibration, there are no other scheduled maintenance requirements. 125-9102A2...

  • Page 87: Section 8 : Rs232 Serial Interface

    6250. A RS232 cable (DB9-male to DB9-female) is also provided with the 6250. Connect the COM port on the PC to the RS232 port on the 6250, using the cable (and USB to RS232 converter) provided. The RS232 connector is located on the top panel, under a protective cover.

  • Page 88: Communication Protocol & Commands

    6250 to overflow. 5. When a command is sent from the PC, the 6250 will always respond with some data. If the command is a request for specific data, then this data will be returned.
  • Page 89 6250 User’s Manual Data sent from Data sent from Command Description 6250 Read the Pitot Actual value in current units None Pitot Actual value Read the Pitot Rate Actual value in current None Pitot Rate units Actual value Read the Static Actual value in current units...
  • Page 90 6250 User’s Manual Data sent from Data sent from Command Description 6250 Read the current Static units None n, where n is 1 to 7 SU=n Set the Static units to n, per the following 0 if OK; or table...
  • Page 91 Set the Limit Password to n. The Limit 0 if OK; or password is reset on power-up Error code Read the Error code for 6250 operational None Error code (0 if errors. These are errors different than those no error) returned in response to a command.
  • Page 92 6250 User’s Manual Data sent from Data sent from Command Description 6250 CP=n Set the Calibration password to n. 0 if OK; or Error code Read the value for calibration point m, where None Value for m is defined in the table below.
  • Page 93 6250 User’s Manual Data sent from Data sent from Command Description 6250 SO=n Returns the values for all the Static (n=0) or Static or Pitot Pitot (n=1) non-linearity offsets as shown offset values below. Static offsets Pitot offsets S0% =x.xxxx P0% =x.xxxx...
  • Page 94 6250 User’s Manual Data sent from Data sent from Command Description 6250 Read the value for Pitot offset m, where m is None Pitot offset as defined in the table below. value Pitot offset 10% offset 20% offset 30% offset...

  • Page 95: Appendix A : Error Codes

    6250 User’s Manual APPENDIX A : ERROR CODES Error code Description Pitot Actual value exceeds knots limit or Mach limit Pitot Rate Actual value exceeds knots/min limit Static Actual value exceeds Feet limit Static Rate Actual value exceeds Feet/min limit...

  • Page 96: Appendix B : Specifications

    6250 User’s Manual APPENDIX B : SPECIFICATIONS Static Output Units Feet, meters, inHg, mbar, psi, mmHg, kpa Pressure function range: 1 to 32 inHg resolution: 0.001 inHg accuracy: 0.003 inHg Altitude function range: -2000 ft. to 50,000 ft. resolution: 1 foot accuracy: 3 ft.

  • Page 97: Appendix C : Connector Pin-Outs

    6250 User’s Manual APPENDIX C : CONNECTOR PIN-OUTS 125-9102A2 Page 97...

  • Page 98: Appendix D : Repair & Return Policies

    SUGAR LAND TX, 77478 U.S.A. Note: Please pack the 6250 in a suitable carton prior to shipping. Do not ship without proper packing. Laversab, Inc. will not be liable for damage to the 6250 if it is shipped without proper packing. 125-9102A2...

  • Page 99: Appendix E : Wifi Operation

    This section includes the process for setting up a wireless Remote, such as an iPad, with the appropriate App for use with the 6250. The wireless Remote will function only if the 6250 has been installed with the optional wireless capability.
  • Page 100 6250 User’s Manual d. Once the correct network has been selected, you may be asked for a password for this network. The password is “lavus505” (the first letter is a non-capitalized L). Once the password has been entered, the Settings column will show the selected network (LAV-xxxxx) in the Wi-Fi section.
  • Page 101 6250 User’s Manual STARTING THE APP Locate and start the Laversab App labeled “2-CH / vx.xx”. The iPad screen will appear as shown in Figure E.2 below for about 3 seconds. The next screen displayed will appear as shown in Figure E.3 below. Press and hold down the Power key displayed on the iPad screen (bottom right), for about 2 seconds.
  • Page 102 6250 User’s Manual Figure E.4 Note: When the iPad is connected through the App to the tester, the keypad on the Wired-Remote is locked, as indicated by the message “Wireless Remote enabled. Keypad locked”, shown on the Wired- Remote. The upper section of the display on the Wired-Remote will continue to be updated, even though the keypad is locked.
  • Page 103 6250 User’s Manual To reconnect the tester to the iPad App, in iPad Settings, check that the correct network is selected and restart the App. The Power key in the App may then be used to establish communication between the App and the tester.

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