I wrote some time ago that I have aquired 'the Dodo of Multimeters' (Yokogawa Electric Works Model 2441), but I did not have time until now to come back to the topic.
Here it comes. And it IS dodoistic to the core. It has strange functions, a strange layout and strange connectors. Almost like someone had tried to design a multimeter which is as different as possible from all others as the single aim.
One should note the slide switch 'Measure - Error - Set Reference'. That was visible on the earlier pics too. What was missing is the view with the two pots on the left side, which are where you can set the reference.
Also look at the connectors, which are at the right side. First the presence of a 'Out' connector and then the inverted type (akin to those appearing on some Simpson meters). And then - who puts 'Ohms' and 'Amps' on one connector and 'Volt' and 'Hertz' on the other?
Also those probes - for most other probes it seems clear why they are designed the way they are. For those, I don't know. What is the purpose of that neck if the long needle precludes sticking something on?
The first picture shows the 'Measure' mode. It behaves like other 'hybrid' multimeters. The analogue meter shows the same value (roughly) than the digital display.
The second picture shows the 'Error' mode. The reference is set to 6.75V and therefore it shows '0' on the analogue meter. The 'Out' connector gives the set reference value scaled in mV when the meter is in 'Measure' and in 'Set Reference' mode. In 'Error' mode, where I would have found that most likely to be used, it outputs a constant value of 484mV.
Also, the usage of this signal during a measurement is unclear to me, especially when not measuring a benign DC voltage like 6.75V, because it shares the 'Com' connector with the measurement signal!
Home
Help
Search
Login
Register
