TA044
WARNING Warning statements identify conditions or practices
CAUTION Caution statements identify conditions or practices
to this product or other
70 MHz High-Voltage Differential Probe
User’s Manual
This probe complies with IEC-1010.2-031 CAT I, Pollution Degree 2.
1. Safety terms and symbols
Terms appearing in this manual:
that could result in injury or death.
that could result in damage
property.
Symbols appearing on the product:
Danger
High Voltage
DO139-1 © Copyright Pico Technology 2008 1
Protective
(Earth) Terminal
Attention
Refer to Manual
WARNING Before making connections to the in p ut leads of this
output lead is grounded.
You may do this either by connecting the BNC shell
, or by
the auxiliary grounding terminal to a
ad the next paragraph for
2. General safety summary
Please review the following safety precautions to avoid injury and prevent damage
to this probe or any products that are connected to it.
Observe maximum working voltage
To avoid any injury, do not use the probe above 2500 V rms CAT I between each
input lead and earth or above 5000 V rms CAT I between the two input leads.
Must be grounded
This probe is grounded with the shell of the BNC connector and an auxiliary
grounding terminal.
probe, ensure that its
You must verify that the probe is securely grounded before connecting the probe
input leads. Some types of measuring instrument, such as a USB oscilloscope
connected to a laptop, are unlikely to be grounded even if the laptop is powered
from the mains. Bench-top oscilloscopes are us ually gro unded, b ut in so me cases
may have been isolated from ground. A USB oscillosco pe connected to a deskto p
computer is usually grounded. In any case, do no t assume tha t the mea surement
instrument is grounded. Always verify the ground connection for yourself
before connecting the probe input leads.
Use fused test prods if necessary
If this probe is intended to use for measurements in circuits of INSTALLATION
CATEGORY III, it should incorporate with fused test prods.
to a grounded measurement instrument
connecting
reliable ground po int. Re
further advice.
Do not operate without covers
To avoid electric shock or fire hazard, do not operate this probe with the covers
removed.
Do not operate in wet or damp conditions
To avoid electric shock, do not operate this probe in wet or damp conditions.
Do not operate in explosive atmosphere
To avoid injury or fire hazard, do not operate this probe in an explosive
atmosphere.
Avoid exposed circuitry
To avoid injury, remove jewelry such as rings, watches and other metall ic objects.
Do not touch exposed connections and components when power is present.
2 © Copyright Pico Technology 2008 DO139-1
Use proper power source
WARNING To protect against electric shock, use only the
accessories designed for use with this differential
CAUTION This probe is designed for carrying out differential
the circuit
under test. It is not intended for electrically
insulating the circuit under test and the measuring
To ensure proper functioning of this probe, use four AA cells or a 6 VDC / 200 mA
mains adaptor or 9 VDC / 120 mA mains adaptor or power leads.
Do not operate the probe if it is damaged
If you suspect there is damage to thi s probe , have it inspecte d by qualified service
personnel.
3. Description
By enabling conventional oscilloscopes to display and measure in-circuit
waveforms that are referenced to high common-mode voltages, this differential
probe extends the measurement capability of oscilloscopes to electronic power
converters, inverters, motor speed controls, switch-mode power supplies and
many other applications.
4. Installation
a. Simply plug in the BNC output connector to the vertical input of a
general-purpose oscilloscope or other meas urement instrument, and connect
the auxiliary grounding terminal to a proper ground. The measurement
instrument must have a ground ref erence.
b. Install four AA cells or connect an appropriate power source to this probe.
c. Select the proper attenuation ratio. When measuring signals below 700 V,
switch the attenuation ratio to 1/100 in order to get higher resolution and less
noise. Otherwise , set the attenuation to 1/1000.
probe.
d. Using the appropriate probe accessories, connect the input to the circuits
under measurement.
measurements between two points on
instrument.
DO139-1 © Copyright Pico Technology 2008 3
A. Output Lead
The BNC output connector and an auxiliary grounding
B. Input Leads
The input leads of the differential probe c onnect to sprung
C. Sprung Hooks
The sprung hooks are connected safely to t est points in the
A B C
5. Appearance
The differential probe looks like this:
terminal are connected to the oscilloscope.
hooks that come with the probe.
circuits under test.
4 © Copyright Pico Technology 2008 DO139-1
6. Power leads
Oscilloscope front
Two types of power leads are available for use with this instrument:
a. Lemo
b. Probus
®
Lead: For oscilloscopes with Lemo® power connectors.
®
Lead: For oscilloscopes with Probus® power connectors.
DO139-1 © Copyright Pico Technology 2008 5
Bandwidth
DC to 70 MHz (-3 dB)
Attenuation ratio
1:100/1000
Accuracy
±2%
Input Impedance
10 MΩ // 10 pF each sid e to ground
Input Voltage
Differential Range* (1/100)
Max. Differential* (1/1000)
±700 V (DC + Peak AC) or 700 V rms
±7000 V (DC + Peak AC) or 5000 V rms
Common Mode Range*
±7000V (DC + Peak AC) or 2500 V rms
(1/100 and 1/1000)
Absolute Max. Voltage*
Common mode
±7000 V (DC + Peak AC) or 2500 V rms
(1/100 & 1/1000)
Differential mode
±7000 V (DC + Peak AC) or 5000 V rms
(1/100 & 1/1000)
Output Voltage
Swing
±7V into 50 kΩ load
Offset (typical)
<±5 mV
Noise (typical)
0.9 mV rms
Source Impedance (typical)
50 Ω
CMRR (typical)
-80 dB @ 60 Hz; -50 dB @ 1 MHz
Ambient Operating Temperature
-10 to 40 ℃
Ambient Storage Temperature
-30 to 70 ℃
Ambient Operating Humidity
25 to 85% RH
Ambient Storage Humidity
25 to 85% RH
Power Requirements
Standard
4xAA cells or 6 V DC / 200 mA mains adaptor**
or regulated 9 V DC / 120 mA mains adaptor**
Options
Power leads
Length of Input Leads
60 cm
Length of BNC Lead
90 cm
Weight
500 g
Dimension (LxWxH)
202 mm x 83 mm x 38 mm
7. Specifications
* Voltage limit is the lesser of the DC+Peak AC and RMS values.
**
a. The supplied voltage must be less than 12 V and greater than 4.4 V, otherwise
the probe could be damaged or might not operate properly.
b. Polarity is “+” inside and “–” outside. If the polarity is wrong, a built-in
circuit protects the probe so that no danger or damage will occur.
c. When the voltage of the cells becomes too low, the power indicator on the
panel will flicker.
6 © Copyright Pico Technology 2008 DO139-1
8. Derating curve
20
200
2500
2500
10
100
1000
10000
1.0E+05 1.0E+06 1.0E+07 1.0E+08
Freq ue ncy (Hz)
Voltage (V rms)
The derating curve for absolute maximum input voltage is as follows:
9. Overrange indicator
The overrange indicator lights up red if the voltage of the inp ut signal exceed s the
linear operating range of the probe. When this happens, the signal on the probe
output may not accurately represent the signa l o n the probe input.
10. Test procedure
a. Connect the BNC output connector to the vertica l input of a general-purpose
oscilloscope.
b. Install four AA cells or connect an appropriate mains adaptor to this probe.
c. Set the oscilloscop e input coupling to DC and 1 V/div. Center the trace on
the display.
d. Connect the sprung hooks of the probe to power lines.
e. Set the range of the probe to 1/100.
f. A 50 Hz / 60 Hz sine-wave of proper amplitude will be displayed on the scree n
of the oscilloscope. This means the probe is working properly.
11. Cleaning
Use a soft cloth to clean the probe, taking care not to cause damage.
a. Do not immerse the probe.
b. Do not use abrasive cleaners.
c. Do not use chemicals contains benzene or similar solvents.
DO139-1 © Copyright Pico Technology 2008 7
Pico Technology
Ja
Colmworth Business Park
St. Neots
PE19 8YP
www.picotech.com
Lemo®, Probus® and Pico Technology are registered trademarks.
Issue history:
1
Manufactured in Republic of China.
8.8.2008.
mes House
8 © Copyright Pico Technology 2008 DO139-1
Loading...