Extracted from LEADER (Japan) professional test equipment
UNRECOGNISED MANUFACTURER - Panel Meter
Made in Japan
Manufacturer is unknown - the symbol or logo looks a little like a K with the vertical line of the K looking like a triangle which has been rotated on its side through 90 degrees clockwise.
Circa 1970's (based on the age of the sacrificial test equipment!)
Series 9509
Type: H 1994A (this code appears to refer to the scale NOT the meter itself)
Stamped on the rear of the movement MADE IN JAPAN
All plastic casing
Very large movement (and heavy)
DIMENSIONS:
Face frame measures 87mm wide x 62mm height x 15mm deep
Display window is 75mm wide x 30mm height
Pointer (black) 28mm long
The movement barrel is very large, measuring 53mm diameter x 31mm deep
Four mounting bolts (with nuts) mount this meter onto a panel
The rear of the movement barrel has two large bolts (with nuts) and a solder lug
Polarity is marked at these terminals
The meter scale comments:
The scale is marked as LEVEL V p-p and is scaled from 0 - 5V and 0-2.7
The current meter scale was made to purpose BUT it can be removed, re-labelled and replaced.
Removal of the front casing is easy (clip on) and this reveals two hex bolts securing the scale in place. Very careful removal of the existing scale, re-labelling and placing back on the face and you are ready to go.
Of course this is a very delicate process as this requires working behind the pointer.
COSMETIC CONDITION:
In excellent condition, as new in fact
No marks or scratches on the clear acrylic display window
There is no parallax mirror fitted
The meter has no built in facility to be backlit
TESTING:
I have established following during testing...
100uA F.S.D
Coil resistance is 1160 Ohm
The movement provides heavy damping, resulting in very smooth movement of the pointer when current passes through the meter
Front mechanical zero adjustment
Fully functional and without any "quirks" - pointer movement is very smooth, this meter has "class"!
