Đồng hồ để bàn Keithley 2750 Multimeter Data Acquisition Switch System

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Integra Series systems (2700, 2701, 2750) combine precision measurement, switching, and  control in a single, tightly integrated enclosure for either rack-mounted or benchtop applications. These cost-effective, high performance test platforms offer affordable alternatives to separate DMMs and switch systems, dataloggers/recorders, plug-in card data acquisition equipment, and VXI/PXI systems. The Integra Series plug-in switching and control modules offer unmatched flexibility and testing efficiency for a wide range of industries and applications. System builders can create test solutions with a combination of channel count, cost per  channel, and system performance unmatched by any other single-box measurement system. The input modules provide the flexibility to vary the channel count from 20 to 200 (2-pole), apply a stimulus to the device under test, route signals, control system components, and make precision measurements with up to 14 functions. Robust  digital I/O capabilities can be used for triggering, handshaking with other automation equipment, and alarm limit outputs. Scan rates of up to 500 channels/second (up to 3500 readings/second on a single channel) will increase test  productivity.

Fast Setup and Operation

The Integra systems are fully integrated, off-the-shelf measurement and control systems. Their DMM- like interfaces make it easy for users to collect data and/or perform troubleshooting within minutes of installation and startup. Once sensor or DUT leads are hooked to the instrument’s input, use the front panel controls to select the measurement function, range, filtering, scaling, trigger source, scanning sequence, alarms, and more. The free ExceLINX-1A software makes it easy to configure and use the system in a graphical “point-and-click” environment. This gives developers the basic tools needed to create a simple application without writing program code.

The Advantage of Integrated Design

The Integra systems offer a variety of advantages over existing solutions for ATE and data acquisition applications. For example, their flexible modular architecture and integrated measurement, switching, and control capabilities save rack space by reducing the number of separate instruments needed. This design also simplifies expanding the system as the number of channels grows or re-purposing it as new test requirements evolve. Integrated signal conditioning, scaling, stimulus, filtering and I/O capabilities eliminate the need for external circuitry when designing and building data acquisition systems. The Integra systems offer accuracy and repeatability superior to plug-in data acquisition boards, while providing faster test times than typical DMM/switch systems. This makes it possible to combine higher test yields with higher test throughout.

Ethernet

The Model 2701 offers a 10/100 BaseT Ethernet connection for high speed and long distance communication between a computer and a virtually infinite number of instruments. Any PC with an Ethernet port can connect to a single Mode 2701 in a point-to-point configuration, to multiple Model 2701s through a hub, or to multiple Model 2701s distributed on a network.

The Model 2701 Ethernet port uses the industry-standard TCP/IP socket interface. This provides data rates up 100Mbits/sec. and allows the instrument to be located up to 100 meters from the nearest  computer or network hub in hardwired systems and miles in wireless Ethernet systems. The maximum distances between a control PC and the instruments are limited only by the size of the network. The instrument also provides a built-in diagnostic Web page for easy remote access to the Model 2701. Entering the instrument’s IP address in the URL line of Microsoft Internet Explorer will allow communication with and control of the Model 2701. This Web page allows users to read and set network parameters, such as IP address, subnet mask, gateway, MAC address, and calibration dates, and to send commands to and query data from the Model 2701.

Temperature Capabilities

Integra Series mainframes support three major types of temperature sensors with built-in signal conditioning and 300V isolation: thermocouples, RTDs, and thermistors. To begin using a sensor, simply hook it up and the instrument does the rest. If a thermocouple is broken or disconnected, the instrument will alert the operator. The mainframes also support three methods for cold-junction compensation (CJC): automatic (built-in), external (built-in), and simulated.

Install up to five input modules in the 2750 mainframe (or up to two in the 2700 and 2701 mainframes). All switch/control modules are fully enclosed in impact-resistant plastic for exceptional ruggedness. Three connector alternatives simplify connecting the modules to DUTs. Rugged D-sub connectors allow quick, secure connections and are especially convenient when performing routine maintenance or when the system is installed in a rack. IDC ribbon cable adapters are supplied with the Model 7701, 7707, and 7709 modules for fast, uncomplicated hookups in production test and process monitoring applications. Oversize screw-terminal connectors simplify setup in applications that require the greatest connection flexibility. Additional D-sub and IDC ribbon cable connector kits and pre-wired cable assemblies are sold  separately.

Rugged 50-pin D-sub connectors ensure dependability and quick setup/teardown in  production test racks.	Screw terminals use oversize connectors for easier, mistake-free wiring. Easy-to-use removable terminals are available on some models.

Software Solutions

Whether the task calls for a simple start-up package to acquire several channels of data or the tools to create a fully custom acquisition and analysis solution, Keithley has the software needed to get the most performance from a Model 2700, 2701, or 2750 Multimeter/Switch System. Our broad range of software solutions makes it easy to get applications “Up & Running” quickly and economically.

Measurement Ranges for the Integra Series Systems

Applications:

• Built-in measurement functions include:
• DCV – ACV – DCI – ACI
• Resistance (2- or 4-wire, offset compensation selectable)
• Dry circuit ohms (20mV clamp) 2750 only
• Temperature (with thermocouples, RTDs, or thermistors)
• Frequency/Period
• Continuity

GENERAL SPECIFICATIONS
EXPANSION SLOTS	5
POWER SUPPLY	100V / 120V / 220V / 240V
LINE FREQUENCY	50Hz to 60Hz and 400Hz, automatically sensed at power-up
POWER CONSUMPTION	80VA
OPERATING ENVIRONMENT	Specified for 0°C to 50°C. Specified to 80% RH at 35°C. Altitude up to 2000 meters
STORAGE ENVIRONMENT	-40°C to 70°C
BATTERY	Lithium battery-backed memory, 3 years @ 23°C
WARRANTY	3 years
EMC	Conforms to European Union Directive 89/336/EEC EN61326-1
SAFETY	Conforms to European Union Directive 73/23/EEC EN61010-1, CAT I
VIBRATION	MIL-PRF-28800F Class 3, Random
WARM-UP	2 hours to rated accuracy
DIMENSIONS	Rack Mounting	89mm high × 485mm wide × 370mm deep (3.5 in. × 19 in. × 14.563 in.)
	Bench Configuration (with handles and feet)	104mm high × 485mm wide × 370mm deep (4.125 in. × 19 in. × 14.563 in.)
SHIPPING WEIGHT	13kg (28 lbs)
DIGITAL I/O	2 inputs, 1 for triggering and 1 for hardware interlock. 5 outputs, 4 for Reading Limits and 1 for Master Limit. Outputs are TTL compatible or can sink 250mA, diode clamped to 40V.
TRIGGERING AND MEMORY	Window Filter Sensitivity	0.01%, 0.1%, 1%, 10%, or Full-scale of range (none)
	Reading Hold Sensitivity	0.01%, 0.1%, 1%, or 10% of reading
	Trigger Delay	0 to 99 hrs (1ms step size)
	External Trigger Delay	<1ms
	Memory Size	110,000 readings
MATH FUNCTIONS	Rel, Min/Max/Average/Std Dev/Peak-to-Peak (of stored reading), Limit Test, %, 1/x, and mX + b with user defined units displayed
REMOTE INTERFACE	GPIB (IEEE-488.2) and RS-232C. SCPI (Standard Commands for Programmable Instruments)
ACCESSORIES SUPPLIED	Model 1751 Safety Test Leads, Product Information CD-ROM, and hardcopy User’s Manual. Software CD-ROM with IVI/VISA drivers for VB, VC/C++, LabVIEW, TestPoint, and LabWindows/CVI, and free runtime startup software
ACCESSORIES AVAILABLE	4288-7 Rack Mount Rear Support Kit 77XX Modules Extended Warranty ExcelLINX-1A (Excel add-in datalogger software) TestPoint TM Software Development Package
SOFTWARE	Windows 98, NT, 2000, ME, and XP compatible

 

DC CHARACTERISTICS
CONDITIONS: MED (1 PLC) 2 or 10 PLC or MED (1 PLC) with Digital Filter of 10
FUNCTION	RANGE	RESOLUTION	TEST CURRENT ±5% OR BURDEN VOLTAGE	INPUT RESISTANCE OR OPEN CKT. VOLTAGE	ACCURACY: ±(ppm of reading + ppm of range) (ppm = parts per million) e.g., 10ppm = 0.001%)			Temperature Coefficient 0°-18°C & 28°-50°C
					24 Hour 23°C±1°	90 Day 23°C±5°	1 Year 23°C±5°
Voltage	100.0000mV	0.1 µV		>10 GΩ	15+30	25+35	30+35	(1 + 5)/°C
	1.000000V	1.0 µV		>10 GΩ	15+6	25+7	30+7	(1 + 1)/°C
	10.0000V	10 µV		>10 GΩ	10+4	20+5	30+5	(1 + 1)/°C
	100.0000V	100 µV		10 MΩ ± 1%	15+6	35+9	45+9	(5 + 1)/°C
	1000.000V	1mV		10 MΩ ± 1%	20+6	35+9	50 + 9	(5 + 1)/°C
Resistance	1.000000Ω	1 µΩ	10 mA	5.9 V	80+40	80+40	100+40	(8 + 1)/°C
	10.00000Ω	10 µΩ	10 mA	5.9 V	20+20	80+20	100+20	(8 + 1)/°C
	100.0000Ω	100µΩ	1mA	12.2V	20+20	80+20	100+20	(8 + 1)/°C
	1.000000kΩ	1mΩ	1mA	12.2V	20 + 6	80+6	100+6	(8 + 1)/°C
	10.00000kΩ	10mΩ	100µA	6.8 V	20 + 6	80+6	100+6	(8 + 1)/°C
	100.0000kΩ	100mΩ	10µA	12.8 V	20 + 6	80+10	100+10	(8 + 1)/°C
	1.000000MΩ	1.0Ω	10µA	12.8 V	20 + 6	80+10	100+10	(8 + 1)/°C
	10.00000MΩ	10Ω	0.7 µA //10MΩ	7.0 V	150+6	200+10	400+10	(70+1)/°C
	100.0000MΩ	100Ω	0.7 µA //10MΩ	7.0 V	800+30	2000+30	2000+30	(385 + 1)/°C
Dry Circuit Resistance	1.000000Ω	1 µΩ	10 mA	20mV	80+40	80+40	100+40	(8 + 1)/°C
	10.00000Ω	10 µΩ	1 mA	20mV	25+40	80+40	100+40	(8 + 1)/°C
	100.0000Ω	100 µΩ	100 µΩ	20mV	25+40	90+40	140+40	(8 + 1)/°C
	1.000000kΩ	1mΩ	10µA	20mV	25+90	180+90	400+90	(8 + 1)/°C
Continuity (2W)	1.000kΩ	100mΩ	1 mA	12.2 V	40+100	100+100	100+100	(8 + 1)/°C
Current	20.00000mA	10nA	<0.2 V		60+30	300+80	500+80	(50+5)/°C
	100.0000mA	100nA	<0.1 V		100+300	300+800	500+800	(50+50)/°C
	1.000000A	1.0µA	<0.5 V		200+30	500+80	800+80	(50+5)/°C
	3.000000A	10 µA	<1.5 V		1000+15	1200+40	1200+40	(50+5)/°C
Channel (Ratio)				Ratio Accuracy = Accuracy of selected Channel Range + Accuracy of Paired Channel Range
Channel (Average)				Average Accuracy = Accuracy of selected Channel Range + Accuracy of Paired Channel Range

 

TEMPERATURE
(Display in °C, °F, or K. Exclusive of probe errors.) Thermocouples (Accuracy based on ITS-90.)
Type	Range	Resolution	90 Day/1 Year (23°C ±5°C)		Temperature Coefficient 0°-18°C & 28°-50°C
			Relative to Simulated Reference Junction	Using 77xx Module
J	-200 to +760°C	0.001°C	0.2°C	1.0°C	0.03°C/°C
K	-200 to +1372°C	0.001°C	0.2°C	1.0°C	0.03°C/°C
N	-200 to +1300°C	0.001°C	0.2°C	1.0°C	0.03°C/°C
T	-200 to +400°C	0.001°C	0.2°C	1.0°C	0.03°C/°C
E	-200 to +1000°C	0.001°C	0.2°C	1.0°C	0.03°C/°C
R	0 to +1768°C	0.1°C	0.6°C	1.8°C	0.03°C/°C
S	0 to +1768°C	0.1°C	0.6°C	1.8°C	0.03°C/°C
B	+350 to +1820°C	0.1°C	0.6°C	1.8°C	0.03°C/°C
4-Wire RTD: (100? platinum [PT100], D100, F100, PT385, PT3916, or user type, Offset compensation On)
	-200° to 630°C	0.1°C	0.6°C		0.003°C/°C
Thermistor: (2.2kΩ, 5kΩ, and 10kΩ)
	-80° to 150°C	0.01°C	0.08°C		0.002°C/°C

 

DC SYSTEM SPEEDS
RANGE CHANGES	50/s (42/s)
FUNCTION CHANGES	50/s (42/s)
AUTORANGE TIME	<30ms
ASCII READINGS TO RS-232 (19.2k BAUD)	55/s
MAX. INTERNAL TRIGGER RATE	2000/s
MAX. EXTERNAL TRIGGER RATE	375/s

 

DC MEASUREMENT SPEEDS
Single Channel, 60Hz (50Hz) Operation
Function	Digits	Readings/s	PLCs
DCV, DCI, Ω (<10M), Thermocouple, Thermistor	6.5	5 (4)	10
	6.5	35 (28)	1
	6.5	45 (36)	1
	5.5	150 (120)	0.1
	5.5	300 (240)	0.1
	5.5	500 (400)	0.1
	4.5	2500 (2000)	0.01
4WΩ (<10M)	6.5	1.4 (1.1)	10
	6.5	15 (12)	1
	5.5	33 (25)	0.1
4W? 0Comp, RTD	6.5	0.9 (0.7)	10
	6.5	8 (6.4)	1
	5.5	18 (14.4)	0.1
Channel (Ratio), Channel (AVG)	6.5	2.5 (2)	10
	6.5	15 (12)	1
	5.5	25 (20)	0.1

 

Multiple Channels Into Memory
7703 and 7710 Scanning DCV	230/s
7703 and 7710 Scanning with Limits or Time Stamp On	230/s
7703 and 7710 Scanning DCV alternating 2WΩ	55/s
7710 Scanning Temperature (T/C)	90/s
7700 and 7708 Scanning Temperature (T/C)	50/s

 

Multiple Channels Into and Out of Memory
7703 and 7710 Scanning DCV	200/s
7703 and 7710 Scanning with Limits or Time Stamp On	200/s
7703 and 7710 Scanning DCV alternating 2WΩ	45/s
7710 Scanning Temperature (T/C)	85/s
7702 Scanning DCV	65/s
7700 and 7708 Scanning Temperature (T/C)	50/s

 

DC SPEED vs. NOISE REJECTION
Rate	Filter	Readings/s	Digits	RMS Noise 10V Range	NMRR	CMRR
10	50	0.1 (0.08)	6.5	<1.2 µV	110 dB	140 dB
1	Off	15 (12)	6.5	<4 µV	90 dB	140 dB
0.1	Off	500 (400)	5.5	<22 µV		80 dB
0.01	Off	2500 (2000)	4.5	<150 µV		80 dB

 

DC MEASUREMENT CHARACTERISTICS
DC Volts
	A-D LINEARITY	2.0 ppm of reading + 1.0 ppm of range
	INPUT IMPEDANCE	100mV-10V Ranges	Selectable >10GΩ// with <400pF or 10MΩ ±1%.
		100V, 1000V Ranges	10MΩ ±1%.
		Dry Circuit	100kΩ ±1% // <1µF
	INPUT BIAS CURRENT	<75pA at 23°C
	COMMON MODE CURRENT	<500nApp at 50Hz or 60Hz
	AUTOZERO ERROR	Add ±(2ppm of range error +5µV) for <10 minutes and ±1°C
	INPUT PROTECTION	1000V, all ranges, 300V with plug-in modules
Resistance
	MAX 4W? LEAD RESISTANCE	80% of range per lead (Dry Ckt Mode). 5Ω per lead for 1Ω range, 10% of range for 10Ω, 100Ω and 1kΩ ranges; 1kΩ per lead for all other ranges
	OFFSET COMPENSATION	Selectable on 4WΩ, 1Ω, 10Ω, 100Ω, 1kΩ, and 10kΩ ranges
	CONTINUITY THRESHOLD	Adjustable 1 to 1000Ω.
	INPUT PROTECTION	1000V, all Source Inputs, 350V Sense Inputs, 300V with plug-in modules
DC Current	SHUNT RESISTORS	100mA-3A, 0.1Ω. 20mA, 5Ω
	INPUT PROTECTION	3A, 250V fuse
Thermocouples	CONVERSION	ITS-90
	REFERENCE JUNCTION	Internal, External, or Simulated (Fixed)
	OPEN CIRCUIT CHECK	Selectable per channel. Open >11.4k ±200Ω
	EARTH ISOLATION	500V peak, >10GΩ and <300pF any terminal to chassis

 

AC SPECIFICATIONS
FUNCTION	RANGE	RESOLUTION	Calibration Cycle	Accuracy: ±(% of reading + % of range), 23°C ±5°C
				3 Hz- 10 Hz	10 Hz- 20 kHz	20 kHz- 50 kHz	50 kHz- 100 kHz	100 kHz- 300 kHz
Voltage	100.0000mV	0.1µV	90 Days (all ranges)	0.35+0.03	0.05+0.03	0.11+0.05	0.6+0.08	4.0+0.5
	1.000000V	1.0µV
	10.00000V	10µV	1 Year (all ranges)	0.35+0.03	0.06+0.03	0.12+0.05	0.6+0.08	4.0+0.5
	100.0000V	100µV
	750.000V	1.0mV
			(Temp. Coeff.)/°C	0.035 + 0.003	0.005 + 0.003	0.006 + 0.005	0.01 + 0.006	0.03 + 0.01
				3 Hz-10 Hz	10 Hz-3 kHz	3 kHz-5kHz
Current	1.000000A	1.0µA	90 Day/1 Yr	0.30+0.04	0.10+0.04	0.14+0.04
	3.00000A	10µA		0.35+0.06	0.15+0.06	0.18+0.06
			(Temp. Coeff.)/°C	0.035 + 0.006	0.015 + 0.006	0.015 + 0.006
				Accuracy ±(ppm of reading + offset ppm) (3 Hz-500 kHz) (333 ms-2 µs)
Frequency 4 and Period	100mV to 750V	0.333ppm	90 Day/1 Yr	80 ppm + 0.333 ppm (SLOW, 1s gate)
		3.33ppm		80 ppm + 3.33 ppm (MED, 100ms gate)
		33.3ppm		80 ppm + 33.3 ppm (FAST, 10ms gate)

 

Additional Uncertainty ±(% of reading)
Low Frequency Uncertainty			MED	FAST
20Hz-30Hz			0.3
30Hz-50Hz			0
50Hz-100Hz			0	1.0
100Hz-200Hz			0	0.18
200Hz-300Hz			0	0.10
>300Hz			0	0
CREST FACTOR	1–2	2–3	3–4	4-5
Additional Uncertainty	0.05	0.15	0.30	0.40
Maximum Crest Factor	5 at full-scale

 

AC MEASUREMENT CHARACTERISTICS
AC Volts	MEASUREMENT METHOD	AC-coupled, True RMS
	INPUT IMPEDANCE	1MΩ ±2% // by <100pF
	INPUT PROTECTION	1000Vp or 400VDC, 300Vrms with plug-in modules
AC Current	MEASUREMENT METHOD	AC-coupled, True RMS
	SHUNT RESISTANCE	0.1Ω
	BURDEN VOLTAGE	1A <0.5Vrms, 3A <1.5Vrms. Add 1.5Vrms when used with plug-in modules
	INPUT PROTECTION	3A, 250V fuse
AC General	AC CMRR	70dB
	VOLT HERTZ PRODUCT	=8 × 10 Volt-Hz

 

AC MEASUREMENT SPEEDS
Single Channel, 60Hz (50Hz) Operation
Function	Digits	Readings/s	Rate	Bandwidth
ACV, ACI	6.5	2s/Reading	SLOW	3 Hz-300 kHz
	6.5	4.8 (4)	MED	30 Hz-300 kHz
	6.5	40 (32)	FAST	300 Hz-300 kHz
Frequency, Period	6.5	1 (1)	SLOW	3 Hz-300 kHz
	5.5	9 (9)	MED	30 Hz-300 kHz
	4.5	35 (35))	FAST	300 Hz-300 kHz
	4.5	65 (65)	FAST	300 Hz-300 kHz