User manual | Datasheet ( identical to SM2040, SM2042, SM2044 specs )

Signametrics
Precision Instruments for the PC
SM2040 Series
6-1/2 Digit PCI Multimeters
■ SM2040
6-1/2 Digit Digital
Multimeter
■ SM2042
6-1/2 Digit MultiFunction Digital
Multimeter
■ SM2044
6-1/2 LCR Sourcing
Digital Multimeter
Hardware features
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DC Voltage and Current
AC Voltage and Current
• True RMS
• Peak-to-Peak
• Crest Factor
• Median
Resistance
• 2-wire
• 4-wire
• 6-wire Guarded Meas.
• Extended Meas. to 1GΩ
RTD Temperature Meas.
Diode V/I Characterization
Capacitance Measurement
Inductance Measurement
Leakage Measurement
Time Measurements
• Variable Threashold
• Frequency and Period
• Duty Cycle
• Pulse Width
• Totalizer, Event counter
Source & Measure Functions
• DC Voltage
• AC Voltage
• DC Current
Internal Temperature
Environment Friendly
• Low Power & Heat
• Minimal Materials Usage
Quality you can measure
Uncompromising Performance
The SM2040 provides a combination of resolution, accuracy and speed that surpasses rivals.
A 6-1/2 digit display, 0.0045% basic DCV accuracy and 1,000 rps assure you of measurements that
are accurate, fast and repeatable. The SM2042 adds a comprehensive repertoire of measurements,
and the SM2044 adds more measurements and source functions, packed into a half-size PCI plugin module. Both measurements and sourcing functions are isolated from the PC and are therefore
truly differential. An on board controller responds to high level commands from the PC,
minimizing overhead.
All in one
The SM2040 series is designed as a universal, multifunction DMM. Measurements commonly
associated with “high-end” system DMMs are standard features with the SM2040 family.
Functions such as 4-wire and 6-wire guarded resistance measurements, inductance
and capacitance, leakage and temperature, RMS and peak-to-peak, frequency and timing, sourcing
of voltage and current, and much more. The SM2044 is best suited for applications demanding
precision sources with simultaneous measurements such as in Parametric testing, while the
SM2040 fits the bill where basic DMM functions are required.
The SM2040 series’ unique “Relative” function allows you to remove lead resistance or other
fixed offsets in your measurement and to perform percent deviation and dB measurements. An
external, level controlled trigger can be used for capturing single-shot events, and store up to 64
measurements on board.
Signametrics
Precision Instruments for the PC
6073 50 th Avenue N.E., Seattle, WA 98115
Phone (206) 524-4074, Fax (206) 525-8578
www.signametrics.com
Easy to install and use
The SM2040 series supports Plug-and-Play
operating systems. Once installed, your
computer will automatically detect and
allocate I/O space, without having to set
address switches.
Voltage, Current and Resistance
DC Volt
[1] Accuracy is % of reading +
Volts.
DC Current
Add to this the intuitive Graphical User
Interface (GUI), and you are up and
making measurements within minutes of
installation. Just point and click to perform
a wide range of complex measurements.
To further increase productivity and to
automate the measurement process, the
SM2040 series examples are provided with
comprehensive Windows98/95/Me/2000 and
NT4.0 support for both textual programming
languages such as “C”, ATEasy, TestPoint,
LabWindows/CVI, MatLab, Delphi etc.
and graphical environments such as VisualBasic, LabView (w/opt. driver), HPVee etc.
[1] Accuracy is % of reading +
Amps. 330nA range available.
The SM2044 provides a guarded 6-wire
resistance measurement method. It is used
to make resistance measurements when the
resistor-under-test has other shunting paths
which can cause inaccurate readings. This
method isolates the resistor-under-test by
maintaining a guard voltage at a user
defined node. Applications include in
circuit test, Resistor Networks, etc.
SM2044
+
V
LO_V
330mV
3.3 V
33 V
330 V
330.0000 mV
3.300000 V
33.00000 V
330.0000 V
100 nV
1 µV
10 µV
100 µV
0.004 + 5.5 µV
0.0025 + 12 µV
0.004 + 280 µV
0.005 + 1.2 mV
0.007 + 8 µV
0.0045 + 17 µV
0.007 + 330 µV
0.008 + 1.5 mV
3.3 mA
33 mA
330 mA
2.5A
3.30000 mA
33.0000 mA
330.000 mA
2.50000 A
10 nA
100 nA
1 µA
10 µA
0.07 + 350 nA
0.06 + 2 µA
0.055 + 40 µA
0.6 + 200 µA
0.1 + 400 nA
0.1 + 3 µA
0.075 + 60 µA
0.65 + 350 µA
Full Scale
Reading
Resolution
Frequency
330 mV
(Signal >5 mV)
330.000 mV
100 nV
3.3 V
(Signal >10 mV)
3.300000 V
1 µV
33 V
(Signal>100 mV)
33.00000 V
10 µV
250 V [2]
(Signal >1 V)
250.0000 V
100 µV
10 Hz - 20 Hz
20 Hz - 47 Hz
47 Hz - 10 kHz
10 kHz - 50 kHz
50 kHz - 100 kHz
10 Hz - 20 Hz
20 Hz - 47 Hz
47 Hz - 10 kHz
10 kHz - 50 kHz
50 kHz - 100 kHz
10 Hz - 20 Hz
20 Hz - 47 Hz
47 Hz - 10 kHz
10 kHz - 50 kHz
50 kHz - 100 kHz
10 Hz - 20 Hz
20 Hz - 47 Hz
47 Hz - 10 kHz
10 kHz - 50 kHz
50 kHz - 100 kHz
3.3 mA
(Signal >50 uA)
3.30000 mA
1 nA
33 mA
(Signal >500 uA)
33.0000 mA
10 nA
330 mA
(Signal >5 mA)
330.000 mA
100 nA
2.5 A
(Signal >50 mA)
2.50000 A
1 µA
Range
Full Scale
Reading
Current
Source
Resolution
33 Ω [4]
330 Ω
3.3 kΩ
33 kΩ
330 kΩ [3]
3.3 MΩ
33 MΩ
330 MΩ [4]
33.00000 Ω
330.0000 Ω
3.300000 kΩ
33.00000 kΩ
330.0000 kΩ
3.300000 MΩ
33.0000 MΩ
330.00 MΩ
10 mA
1 mA
1 mA
100 µA
10 µA
1 µA
100 nA
10 nA
10 µΩ
100 µΩ
1 mΩ
10 mΩ
100 mΩ
1Ω
100 Ω
10 kΩ
[1] Accuracy is % of reading +
Volts.
[2] Signal is limited to 8x106 Volt
Hz Product..
AC Current (RMS)
10 Hz - 20 Hz
20 Hz - 47 Hz
47 Hz - 1 kHz
1 kHz - 10 kHz
10 Hz - 20 Hz
20 Hz - 47 Hz
47 Hz - 1 kHz
1 kHz - 10 kHz
10 Hz - 20 Hz
20 Hz - 47 Hz
47 Hz - 1 kHz
1 kHz - 10 kHz
10 Hz - 20 Hz
20 Hz - 47 Hz
47 Hz - 1 kHz
1 kHz - 10 kHz
[1]Accuracy is % of reading +
Amps.
510 Ω
30 kΩ
LO_I
Resolution
Range
HI_V
HI_I
Full Scale Reading
AC Volts (RMS)
6-wire Guarded Resistance
Measurement (SM2044)
Guard
-
Accuracy 90 Days Accuracy 1 Year
23°C ± 5°C [1]
23°C ± 5°C [1]
Range
220 Ω
G_SRC
Accuracy 90 Days Accuracy 1 Year
23°C ± 5°C [1]
23°C ± 5°C [1]
3.1 + 380 µV
0.93 + 170 µV
0.14 + 110 µV
0.6 + 200 µV
5.4 + 370 µV
3.1 + 2.2 mV
0.96 + 1.5 mV
0.055 + 1.1 mV
0.65 + 1.3 mV
5.2 + 1.7 mV
3.1 + 16 mV
0.96 + 14 mV
0.065 + 11 mV
0.33 + 21 mV
2.2 + 35 mV
3.1 + 160 mV
0.96 + 130 mV
0.045 + 110 mV
0.4 + 170 mV
2.8 + 240 mV
3.2 + 430 µV
0.95 + 200 µV
0.15 + 120 µV
0.63 + 230 µV
5.6 + 400 µV
3.2 + 2.5 mV
1.0 + 1.7 mV
0.065 + 1.2 mV
0.7 + 1.5 mV
5.3 + 2 mV
3.3 + 20 mV
1.0 + 16 mV
0.073 + 13 mV
0.35 + 25 mV
2.4 + 40 mV
3.3 + 200 mV
1.0 + 150 mV
0.06 + 130 mV
0.45 + 200 mV
3.2 + 300 mV
2.7 + 4 µA [1]
0.9 + 4 µA
0.08 + 3 µA
0.14 + 4 µA
2.6 + 30 µA
0.9 + 30 µA
0.15 + 20 µA
0.3 + 40 µA
2.7 + 400 µA
0.9 + 400 µA
0.17 + 180 µA
0.4 + 350 µA
2.5 + 4.5 mA
0.8 + 6 mA
0.63 + 3.8 mA
0.62 + 4.5 mA
2.9 + 4 µA [1]
1.0 + 4 µA
0.12 + 4 µA
0.22 + 4 µA
2.8 + 30 µA
1.0 + 30 µA
0.16 + 30 µA
0.4 + 40 µA
2.8 + 400 µA
1.0 + 400 µA
0.22 + 220 µA
0.6 + 400 µA
2.7 + 5 mA
0.9 + 6 mA
0.65 + 4 mA
0.7 + 5 mA
G_SENS
Example: Assume a 30kΩ resistor is in
parallel with two resistors (510 Ω and 220
Ω), that are connected in series. By sensing
the voltage at the top of the 30 kΩ, and
then applying this same voltage to the
junction of the 510 Ω and 220 Ω there is no
current flow through the shunting path.
With this “guarding”, the SM2044
accurately measures the 30kΩ resistor.
Extended Resistance
(SM2044)
When utilizing the Leakage Measurement
configuration, Use the following equation
to derive the resistance being measured:
Rx = Vs /I, where Vs is the DC voltage
source, and I is the leakage current being
measured. For example, if you set the
leakage test voltage to 9.0V and measure
9 nA of leakage current, this corresponds to
1,000 MΩ of resistance. This application is
useful for testing cables, printed circuit
boards, connectors and semiconductors.
Resistance
2-wire and 4-wire
Ohms
[1] Accuracy is % of
reading + Ohms.
[2] With reading rate set to 2 rps,
within one hour of Ohms zero,
using Relative control.
[3] 4-wire ohms is available to
330 kΩ range.
[4] only available with the
SM2042/44.
Accuracy 90 Days Accuracy 1 Year
23°± 5°C [1] [2] 23°± 5°C [1] [2]
0.005 + 1.5 mΩ
0.0046 + 5 mΩ
0.003 + 32 mΩ
0.0033 + 330 mΩ
0.007 + 4 Ω
0.04 + 75 Ω
0.24 + 900 Ω
1.8 + 60 kΩ
0.008 + 2 mΩ
0.007 + 6 mΩ
0.005 + 33 mΩ
0.006 + 350 mΩ
0.009 + 5 Ω
0.05 + 80 Ω
0.26 + 1 kΩ
2.0 + 80 kΩ
Temperature (SM2042 and SM2044)
Temperature
[1] These specifications are valid for
4-wire type RTD.
RTD Type [1]
pt385, pt3911,
pt3916, pt3926
pt385, pt3911,
pt3916, pt3926
Ro (Ω)
Resolution
Temperature
range
Accuracy 23°C ± 5°C
One Year [1]
100 Ω, 200 Ω
0.01 °C
-150 to 650 °C
±0.06 °C
500 Ω, 1 kΩ
0.01 °C
-150 to 650 °C
Cu (Copper)
Less than 12 Ω
0.01 °C
-100 to 200 °C
Cu (Copper)
Higher than 90 Ω
0.01 °C
-100 to 200 °C
±0.03 °C
±0.18 °C for temp. ≤ 20°C,
otherwise ±0.05 °C
±0.10 °C for temp. ≤ 20°C,
otherwise ±0.05 °C
Leakage (SM2044)
Leakage
Leakage reading
Voltage range
Accuracy 23°C ± 5°C One Year [1]
[1] Accuracy is % of reading +
Amp.
Error does not include external
shunt resistor’s tolerance.
1.00 nA to 100.00 nA
-10 V to + 10 V
2 + 350 pA
100.00 nA to 1000.00 nA
-9 V to + 9 V
1.2 + 2 nA
1000.00 nA to 3300.00 nA
-7 V to + 7 V
1.5 + 20 nA
Peak to Peak, Crest and Median (SM2042, SM2044)
ACV P-P [2]
ACV Range
Full Scale reading
(Vp-p)
[1] Accuracy is % of reading +
Volts
[2]Specified from 30Hz to 10kHz.
330 mV
3.3 V
33 V
250 V
1.85 V
18.5 V
185 V
850 V
AC Crest Factor [2]
Lowest specified
Accuracy
Resolution input
voltage (Vp-p) 23°C ± 5°C One Year [1]
1 mV
10 mV
100 mV
1V
0.1 V
1V
10 V
100 V
1.5 ± 10 mV
1.4 ± 70 mV
1 ± 700 mV
1 ± .6 V
Lowest specified
Highest specified
ACV Range Resolution input
voltage (Vp-p) input voltage (Vp-p)
[1] Accuracy is % of reading +
Constant.
[2]Specified from 30Hz to 10kHz.
330 mV
3.3 V
33 V
250 V
0.01
0.01
0.01
0.01
AC Median [2]
ACV Range
Full Scale reading
[1] Accuracy is % of reading +
Volts.
[2]Specified from 30Hz to 10kHz.
330 mV
3.3 V
33 V
250 V
± 0.950 V
± 9.50 V
± 95.0 V
± 425 V
Accuracy 23°C ± 5°C
One Year [1]
1.8 V
18 V
180 V
700 V
0.1 V
1V
10 V
100 V
2.2 ± 0.3
2.1 ± 0.1
2 ± 0.1
2 ± 0.1
Lowest specified
Resolution input
voltage (Vp-p)
Accuracy 23°C ± 5°C
One Year [1]
0.08 V
0.8 V
8V
80 V
1 mV
10 mV
100 mV
1V
3.3 ± 17 mV
3 ±160 mV
3 ±1.4V
3% ± 12V
Timing Function (SM2042, SM2044)
Timing Threshold DAC
Selected VAC range
Threshold Range
Threshold DAC
Resolution
[1] Accuracy ± (% of setting + volts).
330mV
3.3 V
33 V
250 V
-1.0V to +1.0V
-10.0V to +10.0V
-100.0V to +100.0V
-500V to +500V
0.5 mV
5.0 mV
50 mV
500 mV
Typical one year
setting uncertainty [1]
0.2% + 4mV
0.2% + 40mV
0.2% + 0.4mV
0.2% + 4V
ACV Frequency
Frequency Range
1 Hz 100 Hz
100 Hz1 kHz
1 kHz10 kHz
10 kHz100 kHz
100 kHz300 kHz
[1] Input RMS voltage required for a
valid reading. For example, 10% 200% of range indicates that in the
330 mVAC range, the input
voltage should be 33 mV to
660 mV.
Resolution
1 mHz
10 mHz
100 mHz
1 Hz
1 Hz
Uncertainty is ±0.002% of
reading ± adder shown
4 mHz
20 mHz
200 mHz
2 Hz
5 Hz
Input Signal Range [1]
10 - 200%
of range
10 - 200%
of range
10 - 200%
of range
10 - 200%
of range
25 - 200%
of range
ACI Frequency
Duty Cycle
Pulse Width
Frequency Range
1 Hz-100 Hz
100 Hz-1 kHz
1 kHz-10 kHz
10 kHz-500 kHz
Resolution
1 mHz
10 mHz
100 mHz
1 Hz
Uncertainty
0.01% ±4 mHz
0.01% ±20 mHz
0.01% ±200 mHz
0.01% ±2 Hz
Input Signal Range,
3.3 mA Range
Input Signal Range,
33 mA Range
Input Signal Range,
330 mA, 2.5A ranges
10% -500%
10% - 500%
10% -500%
10% - 500%
50% - 100%
50% - 100%
50% -100%
50% -100%
50% -110%
50% - 100%
50% - 100%
50% - 100%
Frequency Range
1Hz to 100Hz
100Hz to 1kHz
1kHz to 10kHz
10kHz to 100kHz
Resolution
0.02%
0.2%
2%
20%
Typical Uncertainty is ±0.03%
of reading ± adder shown
0.03%
0.3%
3%
20%
Full scale reading
100.00 %
100.00 %
100.00 %
100.00 %
Polarity
Positive and Negative pulse
Frequency range Resolution Width range
1 Hz to 100 kHz
2 µS
2 µS to 1S
Uncertainty
0.01% ± 4 µS
Capacitance Measurements (SM2042, SM2044)
Capacitance
[1] Accuracy is % of reading +
Farads.
[2] Within one hour of zero, using
Relative control. Accuracy is
specified for values higher than
5% of the selected range with
the exception of the 10 nF
range, which is capable of
measuring down to 0 pF.
Range
Full Scale Reading
Resolution
Accuracy One Year
23°C ± 5°C [1]
10 nF
100 nF
1 µF
10 µF
100 µF
1 mF
10 mF
11,999 pF
119.99 nF
1.1999 µF
11.999 µF
119.99 nF
1.1999 mF
11.999 mF
1 pF
10 pF
100 pF
1 nF
10 nF
100 nF
1 µF
2.1 ± 5 pF [2]
1
1
1
1
1
2
Inductance Measurements (SM2044)
Inductance
[1] Accuracy is % of reading +
Henry.
[2] Accuracy is specified for
values greater than 5% of the
selected range.
[3] Minimum measureable
500 nH.
Range
Full Scale
Reading
Resolution
Default
Frequency
Accuracy One Year
23°C ± 5°C [1]
33 µH
330 µH
3.3 mH [3]
33 mH
330 mH
3.3 H
33.00 µH
330.0 µH
3.300 mH
33.00 mH
330.0 mH
3.300 H
1 nH
10 nH
100 nH
1 µH
10 µH
100 µH
75 kHz
50 kHz
4 kHz
1.5 kHz
1 kHz
100 Hz
3 + 500 nH [2]
2 + 3 µH
1.5 + 25 µH
1.5 + 200 µH
2.5 + 3 mH
3 + 35 mH
Internal Temperature
(SM2042, SM2044)
A special on-board temperature sensor
allows monitoring of the DMM’s
internal temperature. This provides the
means to determine when to run the
self-calibration function (S-Cal) for the
DMM, as well as predicting the
performance of the DMM under
different operating conditions. When
used properly, this measurement can
enhance the accuracy and stability of
the DMM. It also allows monitoring of
the PC internal temperature.
Capacitance Measurement
(SM2042, SM2044)
The SM2042/44 measures capacitance
using a differential charge slew method,
usable down to a few pF. With the
exception of the 10 nF range, each of
the ranges has a reading span from 5%
of range to full scale. For testing surface
mount parts, use the optional
Signametrics SMT Tweezer probes.
Inductance Measurement
(SM2044)
The SM2044 measures inductance using
a precision AC source with a frequency
range of 20 Hz to 75 kHz. Since
inductors can vary greatly with
frequency, you should choose the
appropriate generator frequency. In
addition to inductance, the inductor’s
Q factor is measured.
Sourcing Functions
(SM2044)
The SM2044 adds a number of sourcing
functions, giving great versatility for a
variety of applications. All of the
available sources, VDC, VAC, and IDC
are isolated. This allows sourcing with
a significant common mode voltage as
well as the ability to connect several
SM2044 units in parallel for increased
DC current, or in series for increased
DC voltage.
Two D/A converters (DACs) are used
for the source functions, a 12 bit DAC,
and a Trim DAC. The last augments
the 12 bit DAC to form a 16 bit
composite DAC. For functions
requiring high precision, use both
DACs by selecting the ClosedLoop
mode, otherwise only the 12 bit DAC
is engaged.
Software Compatability
The Signametrics products are designed to
be compatible with most Windows® S/W
including VisualBasic®, “C++”, HPVee®,
ATEasy®, Matlab®, TestPoint®,
LabWindows®, LabView® and other
packages. Also provided is a VisualBasic®
panel with sources and plug-and-play setup.
Company Background
The Signametrics design team has many
years of experience designing brand name
bench top instruments. That experience has
resulted in a family of PC instruments that
maintain accuracy and performance.
Signamentrics instruments are designed to
sustain, without damage, the inevitable over
voltage events that occur with bench top
instruments. Attention to reliability in the
design phase results in instruments that
demonstrate over 1,000,000 hours MTBF
in operation.
AC/DC Voltage Source and Current Source (SM2044)
DC Voltage
Source
[1] Accuracy is % of
reading + Volts
Parameter
Closed Loop
Output Voltage range
Maximum Current source/sink
DAC resolution
Accuracy 23°C ± 5°C One Year [1]
Typical settling time
Typical source resistance
AC Voltage Source
[1] Accuracy is % of
reading + Volts
-10.000V to +10.000V
10 mA
16 bits
0.015% ± 250 µV
3S
Parameter
[1] Accuracy is % of
reading + Amps
Closed Loop
Range
Compliance Voltage
Resolution
Minimum level
Accuracy 23°C ± 5°C
One Year [1]
1.25 µA
12.5 µA
125 µA
1.25 mA
12.5 mA
4.2 V
4.2 V
4.2 V
4.2 V
4.0 V
400 pA
4 nA
40 nA
400 nA
4 µA
1 nA
10 nA
100 nA
1 µA
10 µA
0.2% + 1 nA
0.1% + 10 nA
0.1% + 100 nA
0.1% + 1 µA
0.1% + 10 µA
Input Characteristics
Temperature
Coefficient
All Functions Less than 0.1 x accuracy specification per °C at 23°C ± 5°C.
Specifications assume a zero operation performed within an hour of
measurement, and Self Cal within four hours.
DC Volts
Reading Rate
(user selectable) 0.5 to 1,000 rps
up to 10 rps, 6-1/2 digits
up to 30 rps, 5-1/2 digits
PCI Bus
Overload Protection
(voltage inputs) 300 VDC, 250 VAC
(DIN Connector) 50 VAC
Isolation
300 VDC, 250 VAC from Earth Ground
Maximum Input
(Volt x Hertz)
6
8x10 Volt x Hz Common Mode input (across Voltage HI & LO).
Input Resistance
Calibration
Temperature Range
Power
Size
Calibrations are performed by Signametrics in a computer with a 10°C
internal temperature rise. All calibration constants are stored in a text file.
Calibration can be performed by any calibration laboratory having the
appropriate equipment.
0°C to 50°C, operating
+5 VDC, 300 mA maximum
8.2" X 4.4"
Warranty
>10 GΩ
33 V & 330 V Ranges
10 MΩ
NMRR
50, 60, 400Hz
>95 dB
CMRR
@ ≤10 rps with 1 kΩ lead imbalance
>120 dB
Burden Voltage
< 350 mV for all ranges
Over Current Protected
fuse, top accessible
Input Resistance
1 MΩ, shunted by < 100 pF, all ranges
Crest Factor
3 at Full Scale, increasing to 7 at
Lowest Specified Voltage
AC coupled Specified range:
10 Hz to 100 kHz
Typical Settling time
< 0.5 sec to within 0.1% of final value
DC Current
AC Volts
Designed to IEC 1010-1 guidelines, for IEC 664 Installation Category II.
All DMM inputs are to be used in protected, low energy circuits only.
Approved
330 mV & 3.3 V Ranges
Noice Rejection
1x106 Volt x Hz Common Mode input (across Voltage HI & LO relative to
Earth Ground).
Safety
Open Loop
0 to 20 V peak-to-peak (0 to 7.071068V RMS)
16 bits
12 bit
10 mA
ACV spec ± 2 mV
ACV spec + 0.8% ± 8 mV
10 S
1.5 S
250 Ω
2 Hz to 75 kHz / 2 Hz
100 ppm ± 1 Hz
Other specifications
Hardware Interface
12 bits
0.13% ± 35 mV
2 mS
250 Ω
Output Voltage
DAC resolution
Peak Current
Accuracy 23°C ± 5°C One Year [1]
Typical settling time
Typical source resistance
Frequency range / resolution
Frequency stability
DC Current Source
Open Loop
CMRR @ ≤10 rps with 1 kΩ lead imbalance >60 dB.
AC Current
Burden Voltage
350 mV RMS all Ranges
Crest Factor
3 at Full Scale, increasing to 7 at Lowest
Specified Current
Over Current Protected
2.5 A fuse. top accessible
Trigger Input
Input active voltage level range
+3 V to +15 V
Minimum input current
1 mA
Timing Characteristics
Trigger occurs within 1/reading rate
Isolation
±35 V from analog DMM inputs, and
from computer chassis earth ground.
Note: Signametrics reserves the right to make changes in materials, specifications,
product functionality or accessories without notice.
Signametrics products are warranted for a period of one years from date
of delivery against defects in material or workmanship. Returned
products will either be repaired or replaced at Signametrics’ discretion.
Guarantee
If, for whatever reason, you are not satisfied with your Signametrics
purchase, please return it within 30 days for a refund.
Signametrics
Precision Instruments for the PC
Updated: 5/30/00
6073 50 th Avenue N.E., Seattle, WA 98115
Phone (206) 524-4074, Fax (206) 525-8578
www.signametrics.com

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