Fluke 8845A, Руководство пользователя

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8845A/8846A
Users Manual
1-10
Trigger Delay ...................................................... 0 s to 3600 s; in 10
μ
S increments
External Trigger Delay ........................................ <1 mS
External Trigger Jitter ......................................... <500
μ
S
Trigger Input ....................................................... TTL Levels
Trigger Output..................................................... 5 V maximum (open collector)
Memory
8845A.................................................................. 10,000 measurements, internal only
8846A.................................................................. 10,000 measurements, internal, and up to 2 Gigabyte capacity with
USB memory module (available separately, see “Accessories”) through
front-panel USB port
Math Functions
Zero, dBm, dB, MX+B, Offset, DCV ratio and TrendPlot, Histogram, Statistics (min/max/average/standard deviation), and
Limit Test
Electrical
Input Protection....................................................... 1000 V all ranges
Overrange ............................................................... 20 % on all ranges except 1000 V dc, 1000 V ac (8846A),
750 V ac (8845A), Diode, and 10 A ranges
Remote Interfaces
RS-232C, DTE 9-pin, 1200 to 230400 baud (RS-232C to USB cable available to connect the Meter to a PC USB port.
See Accessories)
IEEE 488.2
LAN and “Ethernet 10/100 base T with DHCP (for IP_ADDRess) option”
Warranty
One year
Electrical Specifications
Accuracy specifications are valid for 6½ digit resolution mode after at least a 1-hour warm-up with Auto Zero enabled.
24-hour specifications are relative to calibration standards and assume a controlled electromagnetic environment per
EN 61326-1:2000-11
DC Voltage Specifications
Maximum Input ....................................................... 1000 V on any range
Common Mode Rejection ....................................... 140 dB at 50 or 60 Hz
±
0.1 % (1 k
Ω
unbalance)
Normal Mode Rejection .......................................... 60 dB for NPLC of 1 or greater with analog filter off and power line
frequency
±
0.1 %
100 dB for NPLC of 1 or greater with analog filter on and power line
frequency
±
0.1 %
Measurement Method ............................................. Multi-ramp A/D
A/D Linearity ........................................................... 0.0002 % of measu0.0001 % of range
Input Bias Current ................................................... <30 pA at 25
°
C
Autozero Off Operation ........................................... Following instrument warm-up at calibration temperature
±
1
°
C and
less than 10 minutes, add error: 0.0002 % range additional error
+5
μ
V.
Analog Filter............................................................ When using the analog filter, specifications are relative to within one
hour of using the ZERO function for that range and NPLC setting.
DC Ratio ................................................................. Accuracy is +/- (Input ac Reference accuracy), where Input
accuracy = DC Voltage accuracy for the HI to LO Input (in ppm of the
Input voltage), and Reference accuracy = DC Voltage accuracy for the
HI to LO (Sense) Reference (in ppm of the Reference voltage).
Settling Considerations ........................................... Measurement settling times are affected by source impedance, cable
dielectric characteristics, and input signal changes.