Atec Valhalla-Scientific-4650A - Manual (Page 2)

Valhalla Scientific, Inc.
4650A Specifications
Sample Rate......................................2 rdg/sec standard mode (1 rdg/sec in TrueΩ mode or 25MΩ rng)
Settling Time ..............................approximately 15 seconds (45 seconds in TrueΩ mode or 25MΩ rng)
Settling Indications................................................. display dims during settling, brightens after settling
4-Wire Lead Rejection:......... 3ppm per % (% = lead+contact resistance
÷ unknown resistance x 100)
Interface: ................... IEEE-488 with subsets SH1 AH1 T6 TE0 L4 LE0 SR1 RL1 PP0 DC1 DT1 C0
Display Type.......................................................................................... 20 character vacuum fluorescent
Indicator Lamps.................................................. rectangular red and green light emitting diodes (LED)
Overrange Indication........................................ display shows "OVERRANGE" or "OPEN CIRCUIT"
Data Entry................................................................27 key silicon rubber keyboard, or via the interface
Calibration Enable Switch ...........................................................front-mounted, screwdriver accessible
Input Connectors ...................................................................... front and rear low-thermal binding posts
Power Requirements
Power .............................................................................. powered from internal sealed lead-acid battery
Battery Endurance .......................................................... up to 4 hours continuous following full charge
Charging Time...............................................................min 10 hours to restore fully discharged battery
Charging Voltage .................................provided by AC line, 105-130VAC or 210-260VAC, 50-60Hz
Charging Mode................................... enabled by front switch or by a logic 0 (short) on rear terminals