Specifications; Temperature Coefficient; Analog Output - Keithley 485 Quick Reference Manual

CONDENSED SPECIFICATIONS
hui Accuracy (1 year) Maximum
18? -28?C Continuous
Range | Resolution +(%rdg + counts)t Inputt
2nA 0.1pA 04 +4 350Vdc
20 nA 1 pA 04 +1 350Vdc
200 nA 10 pA 0.2 +1 350Vdc
2 pA 100 nA 0.15 + 1 350Vdc
20 pA 1 nA 0.1 +1 50Vde
200 pA 10 nA 0.1 +1 50Vdc
2mA 100 nA 0.1. 4-1 50Vdc
tWhen properly zeroed.
tWith no limiting resistance: 1000Vdc with external 100К0 series resistance.
INPUT VOLTAGE BURDEN: Less than 2004V.
RANGING: Manual or autoranging.
AUTORANGING TIME: 200ms per range.
SETTLING TIME AT DISPLAY: Less than 1sec to within 1 count after
ranging.
CONVERSION PERIOD: 300ms.
TEMPERATURE COEFFICIENT: < +0.1 x applicable accuracy
specification per °C.
MAXIMUM COMMON MODE VOLTAGE: 30Vrms, DC to 60Hz
sine wave.
ANALOG OUTPUT:
Output Voltage: +1V = —10000 counts. (Except +100mV -
—10000 counts on 2nA range.)
Output Resistance: 10000.
RELATIVE: Pushbutton allows zeroing of on range readings. Allows
readings to be made with respect to baseline value. Front panel
annunciator indicates REL mode.
DATA STORE and MIN/MAX: 100 reading storage capacity. Records
data at one of seven selectable rates from 3rdgs/s to 1rdg/hr and
manual triggering. Also detects and stores maximum and minimum
readings continuously while in the data store mode.
LOG: Displays the logarithm (base 10) of the input current referenced to
1A.