IET Labs HARS-X Series, Руководство пользователя и обслуживания

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4 SPECIFICATION
HARS Series
CONSULT INSTRUCTION MANUAL FOR PROPER INSTRUMENT OPERATION
HARS-X SERIES
HIGH ACCURACY DECADE RESISTANCE SUBSTITUTER
Temperature Coefficient:
<±50 ppm/
°C for 1 m
Ω
steps;
<±20 ppm/
°C for 10 m
Ω
through 1
Ω
steps;
<±15 ppm/
°C for 10
Ω
steps;
<±5 ppm/
°C for 100
Ω
through 100 k
Ω
steps;
<±10 ppm/
°C for 1 M
Ω
and 10 M
Ω
steps.
Switch Type:
Multiple solid silver alloy contacts.
Switch Capacitance:
Less than 4 pF per switch, low loss.
Operation:
If switches have not been operated for an extended period, they should be rotated a few times to restore contact resistance to specifications.
Resistor Type:
Resistance wire for 0.1
Ω
steps and under;
wirewound, noninductive for 1
Ω
through 1 M
Ω
steps;
resistance film for 10 M
Ω
steps.
Accuracy:
±(0.01% + 2 m
Ω
) after subtraction of zero resistance,
at 23
°C; traceable to NIST.
Zero Resistance:
≤
1 m
Ω
per decade, typical at dc.
Power per Step:
25 mW for 1 m
Ω
steps;
0.2 W for 10 m
Ω
steps;
0.25 W for 100 m
Ω
steps;
0.6 W for 1
Ω
through 100
Ω
steps;
0.5 W for 1 k
Ω
through 1 M
Ω
steps;
0.1 W for 10 M
Ω
steps;
subject to a maximum of 2000 V.
WARNING
MODEL:
HARS-X-4-0.1
SN:
C1-01191538
Figure 2.1.
T
ypical Operating Guide Affix
ed to Unit
Observe all safety rules when working with high voltages or line voltages. Connect the (G) terminal to earth ground in order to
maintain the case at
a safe voltage. Whenever hazardous voltages (>45 V) are used, take all measures to avoid accidental contact with any live compo
nents: a) Use maximum
insulation and minimize the use of bare conductors. b) Remove power when adjusting switches. c) Post warning signs and keep per
sonnel safely away.
IET LABS, INC
.
•
534 Main Street, Westbury, NY 11590
• (800) 899-8438
• (516) 334-5959
• Fax: (516) 334-5988
HARSXCLBL/p1/HARS-X gen'l/10-00
CAGE CODE: 62015
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