Voltage multiplier for test meter. ID Please.

[FIXITNOW]

voltage multiplyer for test meter
picked this up with another test item I guess it belongs to another test meter can anyone id it please

markings on it are

30 VOLTS
1995 OHMS
SCALE READING X2

Holes in each end are standard 4mm sockets

thanks

[Skywave]

As you state, it looks like a range multiplier for a voltmeter and probably a moving coil type. As to what particular voltmeter it was designed to be used with, I have no idea. However, with the data you provided, I did make some deductions - which might help.

First, a few assumptions:
30 VOLTS: I assume that that is the FSD of the meter when this multiplier is not in use.
1995 OHMS: I assume that that is the resistance of this multiplier.
SCALE READING X2: I assume that when this multiplier is in use, the 30-v. scale then becomes 60-v.

So on that basis, my arithmetic produces:
1. When the meter is on the 30-v. FSD range, the meter's resistance is 1995 Ω.
2. The current drawn by the meter will be 15 mA.
3. The sensitivity of the meter is 67 Ω Ohms per volt.

However, if the 30 VOLTS refers to the 'new' FSD, then the above figures change and a re-calc. is then required.

Al.

[Ed_Dinning]

Hi Gents, probably from a 1960s griffin and George school meter.
This used various shunts and multipliers that fitted on to the meter case.
Meter was scaled 0-15 & 0-150 and was possibly a 10mA movement. 30v would be the FSD with the multiplier fitted.

Ed

[FIXITNOW]

thanks guys