9. To  activate  the 
100 
point  DATA 
LOGGER 
with 
minimum/maximum, press and hold in the STO/CLR but- 
ton.  When  the reading  rate r=O  is  displayed  release  the 
STO/CLR button. The STO annunciator turns on. Press 
the RCL button and the last data point is briefly displayed 
followed  by  the  reading  (data). Other data points can be 
displayed  by  holding  in  the  RCL  button.  Turn  off  the 
DATA LOGGER by pressing the STO/CLR button again. 
1.10 ACCESSORIES 
The following accessories can be used with  the Model  197 
MODEL 
1010 
SINGLE RACK  MOUNTING KIT-Used  to 
mount one Model  197 in a standard 5%’’ 
X 
19” rack. 
MODEL  1017  DUAL  RACK  MOUNTING  KIT-Use  to 
mount two Model 197s in a standard 
5Y4” 
X 
19” rack. 
MODEL 
1301 TEMPERATURE PROBE-A  rugged low cost 
temperature  probe  designed  to  allow  precision  temperature 
measurements from  -55  to 150°C. 
MODEL 1600A HIGH 
VOLTAGE 
PROBE-Extends 
DMM 
measurements  to 40kV. 
Model  1641 Kelvin  Test  Lead Set-Special  clip leads allow 
4-terminal  measurements to be made while making only two 
connections. 
MODEL 1651 50-AMPERE CURRENT SHUNT-The  exter- 
nal 
0.001Q 
f 
1 
% 
4-terminal  shunt,  permits  current 
measurements from 
0 
to 50A 
AC 
or DC. 
MODEL  1681 CLIP  ON TEST  LEAD  SET-Contains  two 
leads,  1.2m (48”) long  terminated  with  banana  plugs  and 
spring action clip probes. 
MODEL 1682A RF  PROBE-Permits  voltage  measurements 
from  100kHz  to  250MHz. 
AC 
to  DC  transfer  accuracy  is 
+IdB  from  1OOkHz  to  250MHz  at 
1V, 
peak  responding, 
calibrated in RMS of  a sine wave. 
MODEL  1684  HARD  SHELL  CARRYING  CASE-Hard 
vinyl case,  100mm 
X 
300mm 
X 
350mm  (4” 
X 
13” 
X 
14”) 
has a fitted foam insert with room for the Model 197, an in- 
struction  manual and small accessories. 
MODEL 1751 SAFETY TEST LEADS-This  test  lead set is 
supplied with every Model 197. Finger guards and shrouded 
banana  plugs  help  minimize  the  chance 
of 
making  contact 
with live circuitry. 
MODEL  1754 UNIVERSAL TEST  LEAD  KIT-A  12 piece 
test lead kit, with interchangeable plug-in accessories. Includ- 
ed in the 
kit 
is one set of  test leads (1-red, 1-black), two spade 
lugs, 
two standard banana plugs, two phone tips (.06 DIA.) 
two hooks and miniature alligator clips (with boots). 
MODEL 1972 ANALOG OUTPUT IEEE-488 INTERFACE- 
The Model  1972 is an optional  IEEE-488 interface  that  in- 
cludes all of the logic necessary to interface the Model 197 to 
the  IEEE-488 bus.  The Model  1972 is  similar  to the  Model 
1973 however, 
it 
contains an analog output. The analog out- 
put is  a scaled  output that follows the display  of  the Model 
197. The Model 1972 is field installable. 
MODEL 1973 IEEE-488 INTERFACE-The  Model 1973 is an 
optional IEEE-488 interface for the Model 197. This interface 
adds  extra  versatility  to  the  Model  197 by  allowing  the 
transmission  of  data and commands over the IEEE-488 bus. 
The interface provides all the logic necessary to interface the 
Model 197 to the bus using standard IEEE-488-1978 protocol. 
The Model 1973 is field installable. 
MODEL  1978  RECHARGEABLE  BATTERY  PACK-The 
rechargeable battery pack allows off  line or in the field opera- 
tion of  the Model 197. The pack provides typically five hours 
operation from full charge. The battery pack contains its own 
charging circuit  and can be recharged  within 
10 
hours. The 
battery pack  is field installable. 
MODEL  7008 IEEE-488  DIGITAL  CABLE-Useful  for con- 
necting  the  1973 to  the  IEEE-488  bus.  The Model  7008-3 is 
0.9m (3 
ft.) 
in length and has a standard IEEE-488 connector 
at each end. The Model 7008-6 is 1.8m (6 
ft) 
in length and has 
a standard IEEE-488 connector at each end. 
MODEL 8573 IEEE-488 INTERFACE-The  Model 8573 is an 
IEEE-488 standard interface designed to interface the 
IBM 
PC 
or 
XT 
computers  to  Keithley  instrumentation  over  the 
IEEE-488  bus.  The  interface  system  contains  two  distinct 
parts:  an  interface  board  containing  logic  to  perform  the 
necessary  hardware  functions  and  the  handler  software 
(supplied on disk) to perform the required control functions. 
These two important facets of  the Model 8573 join together to 
give  the  IBM  advanced  capabilities  over  IEEE-488  inter- 
faceable instrumentation. 
MODEL 1685 CLAMP ON 
AC 
PROBE-Measures  AC cur- 
rent by clamping on to 
a 
single conductor. Interruption of  the 
circuit  is  unnecessary.  The Model  1685 detects  currents by 
sensing the changing magnetic field produced by the current 
flow. 
1-311-4 
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