[Amps] Anyone know what the specs are for the two panel meters on Amp Supply LK450-500-550 series?

[wb0gaz at yahoo.com]

 Are the panel meters (plate current, and grid current/HV) considered a milli- or micro-amp meter or a voltmeter? No info in the manuals. They are (per the schematic) both effectively across sub-ohm shunt resistors (grid current is across the sub-ohm shunt resistor to ground; plate current is across the next-up sub-ohm resistor towards the HV PS negative terminal.)

Thanks for any suggestion/info

Dave