PMK 400V Passive Probe with Extended Temperature Range 350 MHz Instruction Manual
- June 12, 2024
- PMK
Table of Contents
- Safety Information
- IEC Measurement Categories
- IEC Pollution Degrees
- IEC Safety Symbols
- About ENVI® Probes
- Specifications
- Typical Voltage Derating
- Typical Input Impedance
- Probe Accessories
- Adjustment Procedures
- Adjustment Procedures
- Scope of Delivery
- Handling
- Maintenance
- Warranty
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Probing Solutions.
Made in Germany.
ENVI®
Passive Probe with extended Temperature Range
350 MHz, 400 V
Instruction Manual
Safety Information
Prevent personal injury, fire and product damage.
To avoid personal injury and to prevent fire or damage to this product or
products connected to it, review and comply with the following safety
precautions. Be aware that if you use this probe assembly in a manner not
specified the protection this product provides may be impaired. Only qualified
personnel should use this probe assembly.
Use only grounded instruments.
Do not connect the probe ground lead to a potential other than earth
ground. Always make sure the probe and the measurement instrument are grounded
properly.
Connect and disconnect properly.
Connect the probe output to the measurement instrument and connect the ground
lead to earth ground before connecting the probe to the circuit under test.
Disconnect the probe input and the probe ground lead from the circuit under
test before disconnecting the probe from the measurement instrument.
Observe probe and probe accessory ratings.
Do not apply any electrical potential to the probe input which exceeds the
maximum ratings of the probe or the accessories connected to it. In a
combination always the lower rating / measurement category applies to both
probe and accessories connected to it. Make sure to comply with the voltage
versus frequency derating curve on page 20.
Keep away from hazardous live circuits.
Avoid open circuitry. Do not touch connections or components when power is
present.
Do not operate with suspected failures.
Refer to qualified service personnel.
Indoor use only.
Do not operate in wet or damp environment. Keep the product dry and clean.
Do not operate the product in an explosive atmosphere.
IEC Measurement Categories
Definitions and Examples
No Measurement Category
not in CAT II, III or IV| Definition:| Many types of test and measuring
circuits are not intended not in CAT II, III or IV to be directly connected to
the mains supply. Some of these measuring circuits are intended for very low
energy applications, but others of these measuring circuits may
experience very high amounts of available energy because of high short-circuit
currents or high open-circuit voltages. There are no standard transient levels
defined for these circuits. An analysis of the WORKING VOLTAGES, loop
impedances, temporary over voltages, and transient over voltages in these
circuits is necessary to determine the insulation requirements and short-
circuit current requirements.
---|---|---
Examples:| Thermocouple measuring circuits, high-frequency measuring circuits,
automotive testers, and testers used to characterize the mains installation
before the installation is connected to the mains supply.
Measurement Category II| Definition:| MEASUREMENT CATEGORY II is
applicable to test and measuring circuits connected directly to utilization
points (socket outlets and similar points) of the low-voltage mains
installation.
Examples:| Measurements on MAINS CIRCUITS of household appliances, portable
tools and similar equipment, and on the consumer side only of socket-outlets
in the fixed installation.
Measurement Category III CAT III| Definition:| MEASUREMENT CATEGORY
III is applicable to test and measuring circuits connected to the distribution
part of the building’s low-voltage mains installation. To avoid risks caused
by the HAZARDS arising from these higher short-circuit currents, additional
insulation and other provisions are required.
Examples:| Measurements on distribution boards (including secondary meters),
photovoltaic panels, circuit breakers, wiring, including cables, busbars,
junction boxes, switches, socket-outlets in the fixed installation, and
equipment for industrial use and some other equipment such as stationary
motors with permanent connection to the fixed installation.
Measurement Category IV CAT IV| Definition:| MEASUREMENT CATEGORY IV
is applicable to test and measuring circuits connected at the source of the
building’s low-voltage mains installation.
Due to these high short-circuit currents which can be followed by a high
energy level, measurements made within these locations are extremely
dangerous. Great precautions shall be made to avoid any chance of a short
circuit.
Examples:| Measurements on devices installed before the main fuse or circuit
breaker in the building installation.
IEC Pollution Degrees
Definitions and Examples:
Overview of measurement categories according to IEC 61010-031
O = No Measurement Category (Other circuits that are not directly connected to
mains)
Pollution Degree 1| No POLLUTION or only dry, non conductive POLLUTION.
NOTE: The POLLUTION has no influence.
---|---
Pollution Degree 2| Only- non conductive POLLUTION. Occasionally, however, a
temporary conductivity caused by condensation must be accepted.
Pollution Degree 3| Conductive POLLUTION occurs or dry, non-conductive
POLLUTION occurs which becomes conductive due to condensation which is to be
expected.
IEC Safety Symbols
The following symbols may appear on the product or in this instruction manual:
| Caution, risk of danger. Refer to manual.
---|---
| Caution, risk of electric shock.
| Earth (ground) TERMINAL.
About ENVI® Probes
The passive probe ENVI ® is ideal for environmental testing, and measurements in climatic chambers from -55 °C to +155 °C. The world’s first modern probe for this high temperature range with 300 V CAT II input voltage range, 10:1 divider and 350 MHz bandwidth is suitable for a variety of applications. Due to its BNC connector with read-out function the probe is universally connectable to any oscilloscope with BNC input and shows the correct measured voltage directly.
Specifications
| ENVI® PHT 312-RO
---|---
Order Number with Read-Out| 835-312-001
Electrical Specifications
Attenuation Ratio (± 2% at DC) (¹)| 10:01
System Bandwidth (- 3 dB)| 350 MHz
Rise Time (10 % – 90 %)| 1 ns
Voltage Coefficient (at DC)| 0.00025 % / V
Input Resistance (System) (± 1 %)| 5 MΩ
Input Capacitance (System)| 20 pF
Compensation Range| 10 pF – 25 pF
Input Coupling of the Measuring Instrument| 1 MΩ AC / DC
Maximum Rated Input Voltages, CAT II (²)
Pollution Degree| 3
Measurement Category II| 300 V CAT II
Maximum Rated Input Voltages, No Measurement Category, not in CAT II, III,
IV (²)
Pollution Degree| 3
No Measurement Category| 400 V / 1250 V peak
Maximum Pulse Rating, No Measurement Category, not in CAT II, III, IV (²)
Upulse (³)| Upulse 1250 V
(Step 0 V to 1250 V)
Mechanical Specifications
Weight (Probe only) | 93 g |
---|---|
Cable Length | 2 m |
Probe Tip Diameter | 5 mm |
Environmental Specifications
Probe head and cable assembly
Altitude | operating | up to 2000 m |
---|---|---|
non-operating | up to 15000 m | |
Temperature Range | operating | -55 °C to +155 °C |
non-operating | -55 °C to +155 °C |
Maximum Relative
Humidity| operating| 98 % relative humidity
*BNC connector and () marked accessories**
Altitude | operating | up to 2000 m |
---|---|---|
non-operating | up to 15000 m | |
Temperature Range | operating | 0 °C to +50 °C |
non-operating | -40 °C to +71 °C |
Maximum Relative
Humidity| operating| 80 % relative humidity for temperatures up to +31
°C, decreasing linearly to 40 % at +50 °C
This product comes with 2 years warranty.
Specifications that are not marked as guaranteed are typical.
- Connected to oscilloscope with an input impedance of 1 MΩ ±1 %.
- As defined in IEC 61010-031. See definitions explained on page 16 and 17.
- No overshoot permitted.
Typical Voltage Derating
Note that the maximum input voltage rating of the probe decreases as the frequency of the applied signal increases.
Valid for no measurement category, not in CAT II, III, IV (¹):
Typical Input Impedance
Note that the input impedance of the probe decreases as the frequency of the applied signal increases.
Valid for no measurement category, not in CAT II, III, IV (¹):
(1) As defined in IEC 61010-031. See definitions explained on page 16 and 17.
Probe Accessories
The parts supplied are “highlighted”, see also “Scope of Delivery” on page 24.
(*) Ambient temperature may not exceed specified limits. See “Environmental Specifications” on page 19 for clarification.
Adjustment Procedures
The probe can be adjusted for DC gain, low frequency (LF) compensation and for
high frequency (HF) compensation.
A factory calibration is possible at any time on request.
The trimmers are sensitive components. Too much mechanical pressure during
adjustment might damage the trimmers.
● LF Compensation
When the probe is connected to the oscilloscope input the first time probes
cable capacitance needs to be matched to the oscilloscope input capacitance.
This matching assures good amplitude accuracy from DC to the probes bandwidth.
A poorly compensated probe clearly influences the overall system performance
(probe + scope) and causes measurement errors resulting in inaccurate readings
and distorted waveforms.
LF compensation is performed by connecting the probe to the CAL – output on
the oscilloscope front panel and adjusting the LF compensation trimmer to
optimum square wave response. For clarification see below figures.
Adjustment Procedures
● HF Compensation
Overshoot doesn´t necessarily need to be adjusted when connecting the probe to
your oscilloscope for the first time.
We recommend to use the following equipment for proper HF compensation:
Rectangular waveform generator with a rise time faster than 700 ps, 50 Ω feed
through and probe BNC adapter. If you do not have the appropriate equipment we
are pleased to help you. Simply send a message to our service department.
HF adjustment is performed by connecting the probe to the rectangular wave
generator.
● DC Adjustment (Factory calibrated)
DC compensation is executed while connected to the oscilloscope. Use a
precision input resistance of 1 MΩ ±0.01 %.
Scope of Delivery
Accessories delivered with each probe are highlighted in the graphical overview.
Item | Qty |
---|---|
Adjustment Tool T Adjustment Tool T | 1 |
BNC Adapter 5.0-L | 1 |
2 Footer Positioner | 1 |
Ground Blade 2.5 | 1 |
HT-Dual Lead Adapter to 0.64 mm | 1 |
HT-Insulating Cap | 1 |
HT-Ground Lead 10 cm | 1 |
HT-Ground Lead 10 cm to 4 mm Banana | 1 |
Instruction Manual | 1 |
Probe ENVI® | 1 |
Solder-in Contact Pin 0.64 mm | 10 |
Solid Tip CuBe 0.8 mm | 1 |
Spring Tip 0.8 mm (¹) | 2 |
- plugged on probe
- installed in probe
Handling
Handle with care especially when fitted with the extra thin and sharp spring
contact tip to avoid any injury. Note that the probe cable is a sensitive part
of the probe. Do not damage through excessive bending or pulling. Avoid
mechanical shock to this product in general to guarantee accurate performance
and protection.
Use ground lead only for connections to earth ground.
The accessories provided with the probe have been safety tested. Do not use
any other accessories than those “originally” provided.
Maintenance
● Cleaning
To clean the exterior of the probe use a soft cloth moistened with either
distillated water or isopropyl alcohol. Before use allow the probe to dry
completely.
● Changing the Probe Tip
To change the probe tip use pliers to grip and pull it carefully straight out
of its contact socket, along the axis of the probe. Do not grip the white
plastic insulator or the housing with pliers, because the tip could be
squeezed and cannot be removed and respectively the probe could be damaged. If
the probe tip is removed, the new tip can be inserted with pliers into the
contact socket, along the axis of the probe. In order to insert the probe tip
completely into the housing, press the probe tip against a hard surface
carefully.
Most oscilloscopes provide a build-in function generator to verify the passive
probe is compensated correctly. After changing the probe tip always use the
build-in function generator or other stand-alone instrument to make sure the
probe is safe to operate.
|
---|---
Use pliers to grip and pull the probe tip carefully out of its contact
socket.| Do not grip the white plastic insulator or the probe housing with
pliers.
Copyright © 2022 PMK – All rights reserved.
Manufacturer
PMK Mess- und Kommunikationstechnik GmbH Koenigsteinerstrasse 98 65812 Bad
Soden am Taunus, Germany
Phone: +49 (0) 6196 5927 – 930
Fax: +49 (0) 6196 5927 – 939
Internet: www.pmk.de
E-Mail: sales@pmk.de
Warranty
PMK warrants this product for normal use and operation within specifications for a period of two years from date of shipment and will repair or replace any defective product which was not damaged by negligence, misuse, improper installation, accident or unauthorized repair or modification by the buyer. This warranty is applicable only to defects due to material or workmanship. PMK disclaim any other implied warranties of merchantability orfitness for a particular purpose. PMK will not be liable for any indirect, special, incidental, or consequential damages (including damages for loss of profits, loss of business, loss of use or data, interruption of business and the like), even if PMK has been advised of the possibility of such damages arising from any defect or error in this manual or product.
Copyright © 2022 PMK – All rights reserved.
Information in this publication supersedes that in all previously published
material. Specifications are subject to change without notice.
M35-PHT-001
Revision 07.2022
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>