Equipment information
Keithley 197 Digital multimeter
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Model:
197
Date:
1984
Category:
Group:
Description:
Autoranging Microvolt DMM
Information
INTRODUCTION
The model 197 is a six function, 5 1/2 digit resolution
autoranging Digital multimeter with a ±220,000 count LCD
(Liquid Crystal Display). This A/D range is greater than the
normal ±199,999 count A/D used in many 5 1/2 digit DMMs. The
5 1/2 digit resolution allows the model 197 to measure DC
voltage from 1µV/count to 1000V. AC voltage and current
measurements are standard in the model 197. TRMS ACV
capability ranges from 1µV/count to 750V. The Model 197
measures resistance from 1mΩ to 220MΩ on seven resistance
ranges. The model 197 has six current ranges that measure
current from 1nA to 10A.
The dB function makes it possible to compress a large range
of readings into a much smaller scope. The model 197 dBm
measurements are referenced to the standard 600Ω impedance
but can be modified with the use of relative (REL) feature.
The model 197 has two IEEE-488 Interface options: The Model
1972 and the Model 1973. These optional interfaces enhance
the capabilities of the model 197 by allowing programmed
control over the IEEE-488 bus. The Model 1972 also includes
an analog output. The bus commands are the same for each
Interface and respond to IEEE-488 protocol.
FEATURES
The model 197 includes the following features:
1. Six Measurement Functions—DCV, AC V, DCA, AC A, OHMS and
dB all built in.
2. (REL) Relative Mode—The relative mode allows offsets to
be nulled out (e.g. test lead resistance for low resistance
measurements) and selects a variety of reference impedances
for dB measurements.
3. Digital Calibration—A non-volatile RAM stores calibration
constants and can be performed from the front panel or over
the IEEE-488 bus.
4. Data Logger—A data storage buffer is included to allow up
to 100 readings and minimum/maximum readings be internally
stored at a user selectable rate. The buffer may be read and
controlled from the front panel or over the IEEE-488 bus. In
the talk-only mode, the output rate can also be programmed.
5. Autoranging—The model 197 includes a fast autoranging
feature for easier measurements.
6. 5 1/2 Digit Resolution—The model 197 has a ±220,000 count
A/D that surpasses the more common ±199,999 count A/D.
7. Four Terminal Ohms—These terminals are used to eliminate
the voltage drop across the current carrying leads.
8. Sensitivity—The model 197 has 1µV, 1mΩ and 1nA
sensitivity. The 1µV of sensitivity allows minute levels of
offset, temperature etc. A 1nA sensitivity allows low
current measurements without special equipment. Measure
leakage, bias and offset current. A 1mΩ sensitivity allows
easy low resistance measurements.
Manual Type:
Service and User Manual
Pages:
73
Size:
8.37 Mbytes (8775303 Bytes)
Language:
english
Revision:
Manual-ID:
197-901-01
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2012 05 20
MD5:
09261e2c571d87fd4c3a15fc82e8c79d
Downloads:
1066
Manual Type:
Service and User Manual
Pages:
65
Size:
3.08 Mbytes (3225625 Bytes)
Language:
english
Revision:
Manual-ID:
197-901-01
Date:
Quality:
Scanned document, all readable.
Upload date:
2018 08 21
MD5:
4dec7cba77bb532b8ce47462b6574e17
Downloads:
467
Information
No Schematics in this File!
This manual contains information necessary for operating and
servicing the model 197 Autoranging Microvolt DMM and the
Model 1978 Rechargeable Battery Pack. The information is
divided into the following sections.
1. Section 2 contains detailed bench operation information
for the model 197.
2. Section 3 contains the information needed to verify the
accuracy of the model 197. Performance verification can be
done upon receipt of the unit or whenever the basic accuracy
of the instrument is in question.
3. Information concerning theory of operation, maintenance
and servicing is contained in Sections 4 through 6.