Frequency Counter - Keithley 2002 User Manual

Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
www.keithley.com
AC COUPLING
For AC only coupling, add the following % of reading:
20–50Hz
rms, Average 0.55
AC+DC COUPLING
For DC>20% of AC rms voltage, apply the following additional uncertainty, multiplied by the ratio (DC/total rms).
% of Reading
rms, Average
HIGH CREST FACTOR ADDITIONAL ERROR
Applies to rms measurements.
Crest Factor 1 – 2
Additional Error
AVERAGE ACI MEASUREMENT
rms specifications apply for 10% to 100% of range.
Settling Characteristics:
Autoranging: Autoranges up at 105% of range, down at 10% of range.

FREQUENCY COUNTER

FREQUENCY/PERIOD INPUT CHARACTERISTICS AND ACCURACY
Frequency
43
Range
AC Voltage Input 1Hz–15 MHz
AC Current Input 1Hz– 1 MHz
Time Base: 7.68MHz ± 0.01%, 0°C to 55°C.
Reading Time: 420ms maximum.
Voltage Input Impedance: 1MΩ ± 2% with <140pF.
Trigger Level Adjustment: Trigger level is adjustable in 0.5% of range steps to ±60% of range in real-time using the up and down range
buttons.
Frequency Ranging: Autoranging from Hz to MHz.
Frequency Coupling: AC only.
TEMPERATURE (RTD)
Range Resolution
–100° to +100°C 0.001°C
–200° to +630°C 0.001°C
–148° to +212°F 0.001°F
–328° to +1166°F 0.001°F
RTD Type: 100Ω platinum, DIN 43760, 4-wire. ITS-90 (PT100, D100, F100) and IPTS-68 (PT385, PT3916).
Sensor Current: 960µA (pulsed).
Temperature Coefficient: ±0.001°C/°C or ±0.002°F/°C outside T
Maximum Source HI Lead Resistance: 200Ω.
Maximum Source LO Lead Resistance: 100Ω.
43 7
Subject to 2 × 10
V·Hz product (for inputs above 20V).
44
Valid for the lowest range. For each range increase, multiply these numbers by 10.
45
Specifications are for 10 power line cycles, autozero on, 10 reading repeat digital filter, 4-wire mode. Exclusive of RTD probe errors.
46
For T ± 1°C, following 4-hour warm-up.
CAL
Specifications are subject to change without notice.
Page 10 of 14
50–100Hz 100–200Hz
0.09 0.015
% of Range
0.05 0.1
±(% of reading)
2 – 3 3 – 4
0 0.1 0.2
<300ms to 1% of step change
<450ms to 0.1% of step change
<500ms to 0.01% of step change
Period
Range Resolution
67 ns – 1 s 5 digits
1 µs – 1 s 5 digits
46
24 Hours
±0.016°C
±0.061°C
±0.029°F
±0.110°F
4 – 5
0.4
90 Days, 1 Year, or 2 Years
Minimum Signal Level
1Hz–1MHz 1–5MHz
60 mV 60 mV
150 µA
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4-Wire Accuracy
7 7
90 Days 1 Year 2 Years
±0.020°C ±0.021°C ±0.022°C
±0.066°C ±0.068°C ±0.070°C
±0.036°F ±0.038°F ±0.040°F
±0.119°F ±0.122°F ±0.126°F
±5°C.
CAL
Multimeter Specifications
44
Maximum
Input
5–15MHz
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400 mV 1100 V pk
1 A pk
7
SPEC-2002 Rev. H / February 2009
Model 2002
Trigger Accuracy
Level ±(% of reading)
0–600V 0.03
0–600mA 0.03