IET Labs PRS-370 SERIES, Руководство по эксплуатации

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SPECIFICATIONS
PRS-370 Series
3
Chapter 2
SPECIFICATIONS
For convenience to the user, the pertinent
speci
fi cations are given in an OPERATING
GUIDE, shown typically in Figure 2.1, af fi xed
to the case of the instrument.
2.1 Specifi cations
User interface:
Numeric keypad, softkeys and color capacitive touch
screen
Accuracy:
±(70 ppm + 1 m Ω ) 2 and 4 Terminal at 23°C ±5°C
Minimum setting:
0.100 000 Ω
Resolution:
1 μΩ or 6 digits
Range:
0.1 Ω - 20 M Ω
Stability:
±50 ppm/year
Thermal emf:
<15 μ V
Resistance difference front to rear binding posts:
±
(
2 ppm + 20 μΩ )
Maximum load:
2 A, 200 V (peak), 0.5 W whichever
applies fi rst
Resistors:
Precision wire-wound and metal foil
TC of resistors:
<1 ppm/°C for 1.37 Ω and above
Relays
1
:
Silver alloy contacts, expected life of 10 8
cycles
Switching time:
<10 ms second per change
RTD simulation:
9 RTD tables can be entered into memory to allow
user selection of temperature and the correct value
of resistance will automatically be programmed.
PT-100 and PT-1000 tables for both Fahrenheit and
Celsius are pre-programmed into memory locations
1 to 4.
Adjustment:
Automatic adjustment procedure utilizing a high pre-
cision DMM eliminates the requirement for manual
trimming of resistors.
Terminals
:
Front and rear connections each consisting of 4
low-emf, gold-plated, tellurium-cop per 5-way bind ing
posts are used for
HI
and
LO
ter mi nal pairs for
CUR-
RENT
and
SENSE
.
GND
bind ing post is con nect ed
to the case, to chassis ground.
ac Frequency Response:
Residual capacitance terminals to GND: < 850 pF
Resistance Typical ac/dc difference @ 1 kHz
0.1 Ω -10 k Ω <100 ppm
10 - 100 k Ω <200 ppm
100 k Ω - 1 M Ω <1%
1 - 20 M Ω <20%
Power requirements:
90 - 264 Vac , 47 - 63 Hz., 30 W. Max.
Fuse: T 0.8 A,250 V, 5 x 20 mm
Environmental conditions:
Operating:
10°C to 40°C;
<80% RH non-condensing
Storage:
-40°C to 70°C ; <90% RH
non-condensing
Remote Control:
GPIB:
GPIB standard 24 pin connector, conforms to IEEE-
488.2; SCPI 1994.0 command set; Hardware or
software con fi gurable addressing range of 1 to 30.
Dimensions:
Bench model: 43 cm W x 8.9 cm H x 33 cm D
(17” x 3.5” x 13”) in front of panel: 3.8 cm (1.5”)
Rack Mount: 47 cm W x 8.9 cm H x 33 cm D
(19” x 3.5” x 13”) in front of panel: 3.8 cm (1.5”)
Weight:
Bench model: 5.5 kg (12 lb) nominal
1
Note: Warranty covers relays up to expected life