Service Manuals, User Guides, Schematic Diagrams or docs for : Keithley 193 193A_901_01A
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Instruction Manual
Model 193A
System DMM
01985, Keithley Instruments, Inc.
Instrument Division
Cleveland, Ohio, U.S.A.
Document Number 193A-901-01
SAFETY PRECAUTIONS
The following safety precautions should be observed before operating the Model ~193A
This instrument is intended for use by qualified personnel who recognize shock huxds .~nd are i,lmiliar
with the safety precautions required to avoid possible injury. Read WET the manual carefully before operating
this instrument.
Exercise extreme caution when a shock hazard is present at the instrument's input. The American National
Standards Institute (ANSI) states that a shock hazards exists when voltage levels greater than 3OV rms or
42.4V peak are present. A good safety practice is to expect that a hazardous voltage is present in any unknown
circuit before measuring.
Ins ect the test leads for possible wear, cracks or breaks before each use. If any defects are found, replxe
wt .R test leads that have the same measure of safety as those supplied with the instrument.
For optimum safety do not touch the test leads or the instrument while power is applied to the circuit under
test. Turn the power off and discharge all capacitors, before connecting or disconnecting the instrunwnt.
Always disconnect all unused test leads from the instrument.
Do not touch any object which could provide a current path to the common side of the circuit under lest
or power line (earth) ground. Always make measurements with dry hands while standing on `1 dry, ill-
s&ted surface, capable of withstanding the voltage being measured.
Exercise extreme safety when testing high energy power circuits (AC line or mains, etc). Refer to the t ligh
Energy Circuit Safety Precautions found in paragraph 2.6 (Basic Measurements).
Do not exceed the instrument's maximum allowable input as defined in the specifications and operation
section.
SPECIFICATIONS
DC VOLTS ACCURACY (5% Digits)" TEMPERATURE
MAXIMUM * t%rdg + counts) COEFFICIENT ANALOG 1
READING RESOLUTION INPUT 24 Hr., 90 Days, 1 Yr., it%rdg+countsli~~ C SETTLING ~
RANGE (5% Digits) 6% 5% RESISTANCE 23O+l"C 23'*5T 23'f5"C O"-18'C & 28--5O~C TIME"*
i
200mV 219.999mV 10" n" 1 IrV >lCX 0.003+2* 0.005+2' 0.00x+2* o.wK? in 1 < zms
2 V 2.19999 V 1 $V lop" >lCx 0.002+ 1 0.005+2 0.007+2 +~
(l.WOS0. I < 1,115
20 V 21.9999 V 10 &V 100 &V 1OMCl 0.003+ 1 0.007+1 0.009+3 (1.lx)O7+O.l < I",>
200 V 219.999 V 100 ,,V lm" 1OMR 0.003+1 O.O07+l 0.009+3 O.WO7 +o. I < lms
1000 v 1000.00 v 1mV 1OmV 1OMR 0.004+1 0.007+1 0.009+5 0.0007+0.1 < I",5
*When properly zeroed. **Multiply digit error by 10 for h%~digit accuracy. "`To (1.01% of step ch.qe.
NMRR: Greater than 60dB at 50 or 60Hr. MAXIMUM MEASUREMENT RATES (into internal
CMRR: Greater than 120dB at dc and 50 or 6OHz memory, filter and multiplex off):
(with lk0 in either lead). 3% Digit 4% Digit 5% Digit 6'12 Digit
MAXIMUM ALLOWABLE INPUT: 1OOOVpeak. 1000 rdgis 333 rdgls 25 rdg:s 25 rdg s
TRMS AC VOLTS (Option 1930)
MAXIMUM ACCURACY (5% Digits)`*'
READING RESOLUTION + t%rdg + counts, 1 Year, 18'.28 c
RANGE (5% Digits) 6% 5% 20Hz-50Hz' 50Hz-IOkHz' IOkHz-20kHz' ZOkHz-100kHz"
2" 2.19999" 1 Ir" 10pv 0.25+ I(10
1 + 100 +
11.35300 I f so0
2ov 21.9999" 10/Lv 100 flv 1+ 1000.25+100 L1.35+ SW I f xx1
2oov 219.999" 100 PV 1mV 1+ 1000.25+ 100 13.31+ 3Nl I _ 3ki
700" 700.00 v 1mV lOmV 1+100 0.35+100 0.5 4~ SW I + SiHl
*Above 2000 COUPES.**Above 20000 counts; 3%+500 typical below 20000. "`Multiply digit erwr by ill for 6'.:-digit .~cur.xy. ~
RESPONSE: True root mean square, ac or ac+dc. 3dB BANDWIDTH: 500kHr typical. !
CREST FACTOR: Rated accuracy to 3. Specified for CMRR: Greater than 6OdB at 50 and 6OHr (Ikl2 1111. ~
pulse widths > lops, peak voltage 5 1.36 x full scale. balance).
AC+DC: Add 60 counts to specified accuracy. dBV (Ref. = 1V): ACCURACY +dBV
MAXIMUM INPUT: 1OOOVpeak ac + dc, 2 x lO'V*Hr. 1 Year. In~-zn c
SETTLING TIME: 0.5s to within 0.1% of change in INPUT ZOHz-ZOkHz ZOkHz-1WkHr RESOLUTION
reading. 14 to +57dHV
INPUT IMPEDANCE: 1Mfi shunted by less than 120pF. (2OOmVt* 7WV rms) 0.2 11.4 ,J OldH\'
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