• I have placed this under New as it is new to me, though decades old in the workings.

    Test Set No.1 is a military version of Model 8 Mark 2 housed in a radiation protective steel case. It incorporates a fuse on low ohms ranges. The ranges are from 3-10 instead of 2.5-10 with top terminals respectiveley at 3000v. There is no dB scale and the resistance scale is located at the bottom. There are no LR or Ins options.
    Military style Avo 8 Mk2

    This instrument was gifted to me by Derek a former Royal Airforce Controller.

    Ranges :-

    DC 3, 10, 30, 100, 300, 600, 1000, 3000 volts - sensitivity 50 uA
    DC 0.05, 0.3, 1, 10, 100 mA, 1, 10 A
    AC 3, 10, 30, 100, 300, 1000, 3000 volts - sensitivity: 1 mA on 100+ volts, 3 mA on 30, 10 mA on 10, 30 mA on 3
    AC 10, 100 mA, 1, 10 A
    R 2k, 200k, 20 M ohm (20, 2k, 200k ohm center)

    See also :richardsradios.co.uk

    . . .
    However, the AVOmeter HR had additional 2500 V (AC) and (DC) ranges which used the corresponding 1000 V ranges, and were connected through two additional terminals at the top corners of the front panel. This feature was continued in the Model 8 and, with an increase to 3000 V to match their 1 - 3 - 10 ranges sequence, in the Model 9, Marks II and IV and the Model 8 Mark V. The 3000 V ranges were deleted in the Model 8 Marks 6 and 7 due to concerns for compliance with contemporary safety standards.

    . . .

    With the DC switch set to its "AC" position and the AC switch set to "DC", no current can flow through the instrument. However whenever any moving coil instrument is likely to be subjected to heavy shock in transit, it is good practice to damp the movement by short circuiting the moving coil using a heavy gauge wire connected across the terminals. On earlier Avometers, this may be done by short-circuiting the input terminals and selecting the most sensitive direct current range. The Model 8 Mark V, 6 & 7 were provided with an "OFF" position on the DC switch which both disconnected the meter's terminals and short-circuited the moving coil.
    wikipedia.org/wiki/Avometer

    Documents:
    User Manual :: Service Manual :: Circuit Diagram :: For images of the innards see Comments, 1,2 &3

  • Just started: User name :: Roger

    Archive to 2018 :: Victron On-line discussion/blog

    Current :: https://community.victronenergy.com/index.html

  • Morning Low ::12.63 | < 12.63 | < 12.39 | < 12.03     Yield :: 1.54K | 1.01K | 610 || 600 | 320 | 160

    31st December : : ML V=11.03 :: Y=40Wh
    30th December :: ML V=12.40 Y=120Wh
    29th December :: ML V=9.84 Y=370Wh
    28th December :: ML V=10.28 Y=80Wh
    27th December :: ML V=11.24 Y=80Wh
    26th December :: ML V=12.39 Y=210Wh
    25th December :: ML V=12.28 Y=790Wh
    24th December :: ML V=11.74 Y=220Wh
    23rd December :: ML V=12.28 Y=310Wh
    22nd December : ML V=9.46 Y=450Wh
    21st December :: ML V=12.23 Y=90Wh
    20th December :: ML V=9.58 Y=330Wh
    19th December :: ML V=12.29 Y=20Wh
    18th December :: ML V=12.30 Y=30Wh
    17th December :: ML V=12.09 Y=710Wh
    16th December :: ML V=12.24 Y=270Wh
    15th December :: ML V=12.40 Y=440Wh
    14th December :: ML V=11.94 Y=760Wh
    13th December :: ML V=11.54 Y=520Wh
    12th December :: ML V=12.52 Y=180Wh
    11th December :: ML V=12.43 Y=390Wh
    10th December : ML V=12.55 Y=10Wh
    9th December ::: ML V=12.47 Y=890Wh
    8th December ::: ML V=12.16 Y=450Wh
    7th December ::: ML V=12.22 Y=240Wh
    6th December ::: ML V=12.37 Y=170Wh
    5th December ::: ML V=12.48 Y=200Wh
    4th December ::: ML V=12.52 Y=570Wh
    3rd December ::: ML V=12.36 Y=940Wh
    2nd December :: ML V=12.24 Y=990Wh
    1st December ::: ML V=10.21 Y=650Wh

  • Morning Low ::12.63 | < 12.63 | < 12.39     Yield :: 1.54K | 1.01K | 610 || 600 | 320 | 160

    30th November : ML V=10.05 :: Y=130Wh
    29th November : ML V=12.05 Y=110Wh
    28th November : ML V=12.44 Y=250Wh
    27th November : ML V=12.05 Y=150Wh
    26th November : ML V=12.29 Y=310Wh
    25th November : ML V=12.81 Y=150Wh
    24th November : ML V=12.83 Y=110Wh
    23rd November : ML V=12.81 Y=140Wh
    22nd November  ML V=12.71 Y=100Wh
    21st November : ML V=12.52 Y=90Wh
    20th November : ML V=12.15 Y=420Wh
    19th November : ML V=12.36 Y=210Wh
    18th November : ML V=12.32 Y=1.0KWh
    17th November : ML V=12.56 Y=590Wh
    16th November : ML V=12.58 Y=770Wh
    15th November : ML V=12.23 Y=740Wh
    14th November : ML V=12.24 Y=110Wh
    13th November : ML V=12.42 Y=260Wh
    12th November : ML V=12.52 Y=760Wh
    11th November : ML V=12.31 Y=720Wh
    10th November : ML V=12.28 Y=610Wh
    9th November ::: ML V=12.27 Y=440Wh
    8th November ::: ML V=12.42 Y=780Wh
    7th November ::: ML V=12.28 Y=970Wh
    6th November ::: ML V=12.28 Y=520Wh
    5th November ::: ML V=12.51 Y=510Wh
    4th November ::: ML V=12.47 Y=650Wh
    3rd November ::: ML V=12.03 Y=560Wh
    2nd November :: ML V=11.97 Y=100Wh
    1st November ::: ML V=11.92 Y=110Wh

  • Morning Low ::12.63 | < 12.63 | < 12.39     Yield :: 1.54K | 1.01K | 610 || 600 | 320 | 160

    31st October :: ML V=12.00 :: Y=120Wh
    30th October :: ML V=12.23 :: Y=80Wh Left router on all night
    29th October :: ML V=12.39 :: Y=120Wh Removed Batt 3
    28th October : ML V=12.56 :: Y=370Wh Remove Batt 3
    27th October :: ML V=12.27 :: Y=1.22KWh Remove Batt 3
    26th October :: ML V=12.34 :: Y=110Wh Remove Batt 3
    25th October : ML V=12.31 :: Y=70Wh Remove Batt 3
    24th October :: ML V=12.44 :: Y=960Wh Remove Batt 3
    23rd October :: ML V=12.44 :: Y=900Wh Remove Batt 3
    22nd October : ML V=12.46 :: Y=690Wh Remove Batt 3
    21st October :: ML V=12.47 :: Y=940Wh Remove Batt 3
    20th October :: ML V=12.32 :: Y=1.33KWh Remove Batt 3
    19th October :: ML V=12.32 :: Y=940Wh Remove Batt 3
    18th October :: ML V=12.36 :: Y=790Wh Remove Batt 3
    17th October :: ML V=12.19 :: Y=870Wh Remove Batt 3
    16th October :: ML V=12.32 :: Y=650Wh Remove Batt 3
    15th October :: ML V=12.16 :: Y=980Wh Remove Batt 3
    14th October :: ML V=11.59 :: Y=270Wh Remove Batt 3
    13th October :: ML V=12.32 :: Y=680Wh Remove Batt 3
    12th October :: ML V=12.33 :: Y=320Wh Remove Batt 3
    11th October :: ML V=12.40 :: Y=100Wh Remove Batt 3
    10th October : ML V=12.60 :: Y=520Wh Remove Batt 3
    9th October ::: ML V=12.56 :: Y=1.07KWh Remove Batt 3
    8th October ::: ML V=12.56 :: Y=1.08KWh Remove Batt 3
    7th October ::: ML V=12.63 :: Y=180Wh Remove Batt 3
    6th October ::: ML V=12.49 :: Y=1.41KWh Remove Batt 3
    5th October ::: ML V=12.71 :: Y=540Wh Remove Batt 3
    4th October ::: ML V=12.67 :: Y=910Wh Remove Batt 3
    3rd October ::: ML V=12.56 :: Y=610Wh Remove Batt 3
    2nd October :: ML V=12.64 :: Y=1.70KWh Remove Batt 3
    1st October ::: ML V=12.51 :: Y=840Wh Remove Batt 3

  • Morning Low ::12.63 | < 12.63 | < 12.39     Yield :: 1.54K | 1.01K | 610 || 600 | 320 | 160

    30th September :: ML V=12.66 :: Y=230Wh Remove Batt 3
    29th September :: ML V=12.52Y=710Wh Remove Batt 3
    28th September :: ML V=12.48Y=440Wh Remove Batt 3
    27th September :: ML V=12.63Y=590Wh Remove Batt 3
    26th September :: ML V=12.44Y=910Wh Remove Batt 3
    25th September :: ML V=12.61Y=310Wh
    24th September :: ML V=12.59Y=930Wh
    23rd September :: ML V=12.69Y=270Wh
    22nd September : ML V=12.55Y=760Wh
    21st September :: ML V=12.48Y=940Wh
    20th September :: ML V=12.36Y=1.86KWh
    19th September :: ML V=12.52Y=1.83KWh
    18th September :: ML V=12.44Y=1.83KWh
    17th September :: ML V=12.66Y=1.72KWh
    16th September :: ML V=12.44Y=570Wh
    15th September :: ML V=12.56Y=1.72KWh
    14th September :: ML V=12.64Y=1.80KWh
    13th September :: ML V=12.51Y=1.62KWh
    12th September :: ML V=12.48Y=820Wh
    11th September :: ML V=12.51Y=370Wh
    10th September :: ML V=12.60Y=1.64KWh
    9th September ::: ML V=12.52Y=420Wh
    8th September ::: ML V=12.51Y=1.05KWh
    7th September ::: ML V=12.55Y=1.03KWh
    6th September ::: ML V=12.59Y=570Wh
    5th September ::: ML V=12.84Y=1.55KWh :: Checked electrolyte level and worse than expected, given the warning signs of high ML. Battery 3 alone was very low and took over 100ml each cell, most of which didn't even cover with nigh on that much water. Battery 3 was in the middle of two other ||| and therefore was warmer ??
    4th September ::: ML V=12.67Y=1.40KWh :: check electrolyte level
    3rd September ::: ML V=12.87Y=900Wh :: check electrolyte level
    2nd September :: ML V=12.71Y=1.03KWh :: check electrolyte level
    1st September ::: ML V=12.54Y=1.58KWh :: 12.54 left router on all night :: check electrolyte level