LV 6 PANEL METER CALIBRATION
| BASIC METER CALIBRATION |
| ALL TESTS REQUIRE AT LEAST 115 VAC POWER and the
LV 6 panel Power switch in the ON position. Other power
requirements as noted in each section. |
| NOTE: LV 6 meter must be calibrated while
installed in the LV 6 panel. Do not switch meters to a different
LV 6 panel because this voids all calibrations! |
| Select NAV DEV on the LV 6 panel meter switch.
Select the 1 load position on the Deviation Load switch. |
| Connect a calibrated 100 uAmp DC source to the LV 6 panel
NAV/LOC DEV L and R tip jacks. |
| If the LV 6 panel meter reads more than (100.0) +/- .1uA
+/- 1 LSD then the basic meter calibration is out of limits.
The adjustment maybe made by the trim pot located on the lower left side
of the meter. After adjustment check meter with 199 uADC and
than 50uADC for correct readings. If either reading is out of
limits send panel and meter to LinAire for repair and/or meter
replacement. Please include your test findings.
Note: 100uA across 1k ohm = 100mV |
| |
| DC VOLTS |
| Select DC VOLTS on the LV 6 panel meter switch.
Apply 28 volts DC to LV 6 panel. |
| Connect your calibrated DVM to the LA NAVS connector pin
1 (HI) and pin 2 (LOW) on the LV 6 panel. |
| If the LV 6 panel meter reads more than (28.0) +/- 1 LSD.
The DC
VOLT trim pot needs to be adjusted. The DC VOLT trim pot is the
third hole from the front of the meter on its left side. |
|
| DC AMP |
| Select DC AMP on the LV 6 panel meter switch. |
| Connect your calibrated Current Meter to the LA NAVS
connector pin 1 and a resistor load bank to LA NAVS connector pin
2. Any DC voltage between 1 VDC and 32VDC can be used for this test
as long as the supply can provide 5 ampere of current. The supply
should be voltage or current regulated.
Adjust input supply for a reading of 5 amps on your current meter and
read the LV 6 panel meter. |
| If the LV 6 panel meter reads more than (5.00) +/- .05 amps +/-
1 LSD the DC AMP trim pot needs to be adjusted. The DC AMP trim
pot is the fourth hole from the front of the meter on its left side. |
| |
| 26 ACV |
| Select 26VAC on the LV 6 panel meter switch. |
| Connect your calibrated DVM to LV 6 panel tip jack
Compass H and tip jack ZZ. |
| If the LV 6 panel meter reads more than (26.0) +/- .1 volt -/+ 1
LSD the AC VOLTS trim pot needs to be adjusted. The AC VOLTS trim
pot is the fifth hole from the front of the meter on its left side. |
| AUDIO RMS |
| The above 26 ACV calibration also calibrated this
position. |
| 115 ACV |
| The above 26 ACV calibration also calibrated this
position. |
| |
| NAV FLAG in uAmp |
| Select NAV FLAG on the LV 6 panel meter switch.
Select the 1 load position on the Flag Load switch. |
| Connect a calibrated 1 mAmp DC source to the LV 6 panel
NAV/LOC Flag + and - tip jacks. |
| If the LV 6 panel meter reads more than (1000) +/- 2 LSD the NAV FLAG trim pot needs to be adjusted. The NAV FLAG trim
pot is the second hole from the front of the meter on its left
side. Note: reading can be read as mVDC across 1k ohm load. |
| |
| GS FLAG in uAmps |
| Select GS FLAG on the LV 6 panel meter switch.
Select the 1 load position on the FLAG Load switch. |
| Connect a calibrated 1 mAmp DC source to the LV 6 panel
GS FLAG + and - tip jacks. |
| If the LV 6 panel meter reads more than (1000) +/- 2 LSD the GS FLAG trim pot needs to be adjusted. The GS FLAG trim
pot is the first hole from the front of the meter on its left side.
Note: reading can be read as mVDC across 1k ohm load. |
| |
| GS DEVIATION in uAmps |
| NO Calibration needed. This is a basic meter
reading. To check apply 100uAmp DC source to the LV 6 panel GS DEV
U and DEV D tip jacks. |
| |
| TO-FROM FLAG This is also a basic meter reading,
however, apply 1mA DC at the LV 6 TO-FROM
tip jacks. The meter will indicate the current
thru the flag load in microamperes. To find the voltage applied to
flag ( mVDC= .2 x reading). 1000uA=200mV |