Keithley 175
Keithley 175 Autoranging Multimeter
Description
Keithley Model175 Autoranging Multimeter combines the functionality and high channel count of a switch mainframe with the accuracy, convenience, and traceability of a true 4.5 digit DMM.
Keithley 175 is a ±20,000 count DMM with five AC and DC voltage ranges, 7 resistance ranges and 5 AC and DC current ranges.
A/D converter is the heart of the model 175 that translates the conditioned analog input signals into a form usable by microcomputer.
It packs all these capabilities into a compact half rack unit at a price that is comparable to a high performance data acquisition board.
The line voltage can be changed to operate Keithley 175 between 105-125v and 230-250v it has an IEEE-488 interface at the rear of the unit.
175 Model can test currents up to 10 Amps. 175 Model comes complete with test leads.
Keithley 175 is a reliable unit and capable of extremely accurate measurement of Voltage, Current and Resistance.
Key Points
4½ Digit LCD Display
Fast Autoranging
Bench or Portable
Digital Calibration
100 Point Data Logger
10µV/10m ohms/10nA Sensitivity
0.03% Basic DCV Accuracy
TRMS AC
dBm/Relative Functions
Min/Max Reading Hold
Safety Input Jacks
10A Capability
100KHz Specified AC Bandwidth
Specifications
Bandwidth: 100KHz
DISPLAY: 41/2-digit LCD, 0.5” height; polarity, function, range and status indication.
RANGING: Auto or manual on DCV, ACV and ohms; manual on ACA and DCA.
AUTO RANGING TIME: 300ms per range.
RELATIVE: Pushbutton allows zeroing of on orange readings. Allows reading to be made with respect to baseline value. Front panel annunciator indicates REL mode.
DATA LOGGER and MIN/MAX: 100 reading storage capacity, records data at one of six selectable rates from 3 rdg/s to 1 rdg/hr. Also detects and stores maximum and minimum readings continuously while in the data logger mode.
CONVERSION RATE: 3 readings/second.
OVERRANGE INDICATION: “OL” displayed.
CREST FACTOR (ratio of peak value to rms value)
AC FUNCTIONS: 3
MAXIMUM COMMON MODE VOLTAGE: 500Vpeak.
COMMON MODE REJECTION RATIO (1K ohm unbalance): > 120 dB at DC, 50 Hz , 60 Hz ± 0.15%. Greater than 60 dB in AC Volts.
TEMPERATURE COEFFICIENT: (0 -18 deg C & 28-50 deg C): 0.1 X applicable accuracy specification/ deg C except ±(0.07% +2)/ deg C for 50Hz-10KHz on ACV.
ENVIRONMENT: Operating: 0 deg C to 50 deg C; less than 80% relative humidity up to 35 deg C; linearly derate 3% RH/ deg C, 35 to 50 deg C, Storage: -25 to +60 deg C
POWER: 105-125V or 210-250V (external switch selected), 90-110V available; 50-60 Hz, 12V*A. Optional 6-hour battery pack, Model 1758.
DIMENSIONS: 89mm high X 235mm wide X 275mm deep
NET WEIGHT: 1.8 Kg (3 lbs)
INPUT RESISTANCE: 11M ohms on 200mV, 2V and 20V ranges. 10M ohms on 200V and 1000V ranges (>1000M ohms on the 200mV and 2V ranges with all function buttons in the out position)
NORMAL MODE REJECTION RATIO: >60dB at MHz, 60Hz ± 15%
<
p>MAXIMUM ALLOWABLE INPUT: 1000V DC or peak AC (<10 sec. per minute on 200mV and 2V ranges; 300Vrms continuous)
SETTLING TIME: 1 sec. to within 1 count of final reading on range.
dB MODE (ref: 600 ohms): Accuracy: ±(0.02dB + 1 count) (above-78dBm). Resolution: 0.01dB above 5% oi range.
