4
HARS-LX Series
4
Specifications
Figure 2-1:
T
ypical Operating Guide Affix
ed to Unit (See label on y
our specific unit f
or actual specifcations)
HARS-LX-5-100 OPERA
TING GUIDE
CONSUL
T INSTR
UCTION MANU
AL FOR PR
OPER INSTR
UMENT OPERA
TION
HARS-LX-5-100 lb
l/5/6/2015
W
ARNING
Obser
ve
all
saf
ety
r
ules
when
w
or
king
with
high
voltages
or
line
voltages
. Connect
the
(GND)
ter
minal
to
ear
th
ground
in
order
to
maintain
the
case
at
a
saf
e
voltage
. Whene
ver
hazardous
voltages
(>45
V)
are
used,
tak
e
all
mea
-
sures to a
void accidental contact with an
y liv
e components:
a) Use maxim
um insulation and minimiz
e the use of bare conductors
. b) Remo
ve po
w
er when adjusting s
witches
. c) P
ost w
ar
ning signs and k
eep personnel saf
ely a
w
ay
.
IET LABS, INC.
www
.ietlabs.com
CA
GE CODE:
62015
• Long Island, NY • Email:
inf
o@ietlabs
.com
• T
el:
(516) 334-5959 • 800-899-8438 • F
ax:
(516) 334-5988
Accuracy:
±(20 ppm+0.5 mΩ)
*At 23°C “true ohm” measurement, 30-70% RH
, absolute reading
No zero subtraction required
Minimum resistance:
100 Ω ± 0.5 mΩ; determined by the lowest settable position, “1”
,
of the 100 Ω/step decade
Resistance repeatability:
Better than 100 µΩ
, short-term, average value
Environmental Conditions:
Operating T
emperature: 0°C to 55°C
Storage T
emperature: -40°C to 70°C
Switch T
ype:
Multiple solid silver contacts; dust-tight diallyl-phthalate bo
dy
.
To allow continuous rotation, a blank position is added on
most decades.
For Best Performance:
Whenever the unit has been idle, turn each switch 7-10 times bo
th
ways before using.
This switch "break-in" procedure is standard
metrology practice required for best accuracy to remove any sil
ver
oxide film on the contact surfaces, typically <1 mΩ
.
Terminals:
Four
, 5-way
, gold-plated, tellurium-copper binding posts with
low thermal emf and low resistance, for four-terminal Kelvin
measurements, plus one binding post connected to case for
shielding. Rear outputs are available as an option.
MODEL:
HARS-LX-5-100
SN:
D5-
1422571
Resistance
per step
Total decade
resistance
Max current
Max po
wer
Temperature
coefficient
(±ppm/ºC)
P
ower
coefficient
(±ppm/mW)
Stability
(±ppm/yr)
Decade positions
whic
he
ver applies fir
st
100
Ω
1 k
Ω
0.1 A
5
W
3
0.1
20 ppm+0.5 m
Ω
10 positions
“1”-”10”
(100
Ω
minim
um reading)
1 k
Ω
10 k
Ω
33 mA
5
W
3
0.1
10 ppm
(<5 ppm typical)
11 positions
“0”-”10”
10 k
Ω
100 k
Ω
10 mA
5
W
3
0.1
100 k
Ω
1 M
Ω
3 mA
5
W
3
0.1
1 M
Ω
11 M
Ω
1 mA
1,500
V peak
3
0.1
12 positions
“0”-”11”
Wiring and s
witc
h resistance
NA
50 µ
Ω
/ºC
0.2 µ
Ω
/W
NA