Hi all,

I have a 1960s/1970s(?) Meratronik Meratester analog multimeter (made in
Poland).

http://www.radiomuseum.org/r/meratronik_meratester_v4028.html

This unit might be known by some other names. Someone was throwing it
out only because they lost the battery cartridge for it. Silly goose,
the typewritten manual says any 12-18V source will do.

It's a *very* high precision and accuracy analog multimeter with high
impedance FET inputs. Came with schematics and user manuals. It easily
outdoes all of my cheap digital multimeters in every way. These guys
thought of everything. Even applies "motor brakes" (whatever the actual
term is for magnetic braking) on the needle so it doesn't get damaged
during transportation.  Also fully specified, with schematics and part
numbers. That's something I really appreciate.

1. The multimeter has a zero knob on it and manual says to zero the
device by selecting the 1.5mV range and adjusting to zero with the leads
shorted before using. However, after doing so, the other voltage ranges
are not zeroed, as the manual implies. They're each offset up to +/- 2
ticks on the dial. And zeroing in another range of course leads to
different offsets in the rest of the ranges. Essentially means that one
must zero every time after selecting a new voltage measurement range.
However, when zeroed, the actual accuracy of the multimeter is
incredible. Testing 1.25V and 5V 0.05% shows that the needle deflects to
exactly where it should be. And I mean *exactly*.

Q1: The manual implies that the whole device should be zeroed after
zeroing the 1.5mV range. But this is definitely not the case. Is this
normal behaviour? Or are all voltage ranges expected to be zeroed after
the 1.5mV (smallest) range is zeroed? Is there a need to open it up and
somehow try to adjust (recalibrate(?)) it?

2. I really like this thing and I would like to buy another one or
something similar. It's sad that such multimeters are so hard to find
these days. The only analog multimeters I can find now are cheap ones
without high impedance inputs. I'm guessing the needle is deflected with
energy taken from the circuit being measured. Not acceptable.

Q2: Can anyone suggest some good analog multimeters and where they can
be bought? They don't have to be antique.
--=20
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