SAKER

SAKER PRODUCTS

Products for the measurement of voltage, current and temperature. Voltage detectors are part of our product line due to our commitment to safety in high voltage and medium voltage systems. SAKER solutions offer fiber optic isolation as one of the core technologies.

Voltage Measurement

Fiber Isolated Voltage Probe XFVP

Fiber Isolated Voltage Probe XFVP-L

Medium Voltage Detectors/Indicators

Voltage Detector Module MVD

Temperature Measurement

Fiber Optic Isolated Temperature Probe

Fiber Optic Isolated Voltage Probe. XFVP

The XFVP isolated voltage probe allows the safe and accurate measurement of floating voltages in power electronic modules or electronics. Although it is best suited for medium voltage equipment due to the isolation provided, the high common mode and EMI rejection make it a perfect choice for general low voltage measurements. The 25V input voltage range with the supplied x10 attenuator is ideal to measure gate voltage in various semiconductor switching devices and study potential problems and improvements. Also input capacitance has been kept to a minimum as this is what really hurts most high-frequency measurements, causing loading of high and medium impedance signal sources and signal degradation.

A calibrate function brings the zero automatically to its position and calibrates the gain of the probe, all this without the need to disconnect the input signal as compared to other probes. A remote standby function allows to safely reduce the power consumption and extend battery life of both probe head and receiver without accessing potentially hazardous areas. The output signal is provided via a BNC connector which allows the use of any 50Ohm input terminated scope.

The probe head is small enough to be used inside cabinets and small modules. It also features a camera mount type tripod thread that allows easy placement and clearances from the probe to ground to be maintained.

Downloads

XFVP Isolated Probe Brochure

Measurements with the XFVP Probe Guide

High Voltage Isolated Probe XFVP User Manual

Probe Accessories

XFVP Quick Reference Guide

Fiber Optic Isolated Voltage Probe. XFVP-L

XFVP-L

The XFVP-L is a novel isolated voltage probe derived from the XFVP and aimed at power electronics and high voltage use. The probe was designed to minimize input capacitance as this is what hurts most high frequency measurements. This together with the optical isolation and the excellent CMRR provides accurate measurements in high-side and floating measurements.

The receiver is USB powered, connects to any oscilloscope via a BNC cable and features an auto-zero function. The emitter runs on standard AA batteries for more than 6h continuously, has a standard camera mount thread and is small enough to fit inside cabinets and small spaces. A unique touch protected SMB input connector designed by SAKER gives users added safety when handling the probe as well as extra signal integrity.

The XFVP-L exceeds the specifications of competing probes, eliminates the need to invest in new scopes making it an ideal choice for customers with tight budgets. Finally researchers have a chance to leave behind the less than optimal measurements taken by traditional differential probes.

Downloads

XFVP Isolated Probe Brochure

XFVP-L User Manual

Probe Accessories

Measurements with the XFVP Probe Guide

XFVP-L Quick Reference Guide

Models Compared

	XFVP	XFVP-L
Type of probe	Split Probe	Split Probe
Bandwidth	220MHz, 110MHz models	220MHz, 110MHz models
Input range	2.5V , up to 2500V with external attenuators	2.5V , up to 2500V with external attenuators
Max. common mode	50kV	50kV
Remote power-off of probe head	Yes	No
Fiber cable length	2m..12m	2..25m
Offset adjustment	Fine auto adjustment	Fine auto adjustment (with no signal at input)
Gain adjustment	Auto adjustment	Manual adjustment
Input connector	Touch protected SMB	Touch protected SMB
Output	Coaxial cable, BNC 50Ohm	Coaxial cable, BNC 50Ohm
Tripod mount	Yes	Yes
Power	Receiver USB powered, Transmitter uses AA batteries	Receiver USB powered, Transmitter uses AA batteries
Tripod included	Yes	Yes
External attenuator included	Yes, one to choose (x2, x10 or x50)	Yes, one to choose (x2, x10 or x50)

What are the differences between the XFVP and XFVP-L?

The measurements obtainable with both models are the same. However the XFVP has some features that may be useful for your particular application.

The XFVP has a bidirectional optical control channel between the emitter and receiver and associated adjustment circuitry. This allows for example a remote standby function by which the probe head is put on standby to save battery while you are not taking measurements. This can be useful in medium voltage applications were reaching the probe head can be hazardous.

The main difference however is in the calibration of the probe. Isolated probes do have offset drift due to temperature changes, so initially after the probe has warmed up a couple of minutes the offset in the XFVP-L can be automatically corrected with no signal at the input by pressing the CAL button. After that a small long term offset drift may be visible due to temperature changes, although this does not generally have to be the case.

The amplitude adjustment in the XFVP-L is fixed with a potentiometer and is very stable, but since it is analog it is a bit less precise than the XFVP. To ease the adjustment of the amplitude we have designed the GEVP-OSC which is a small battery powered oscillator with a precise 2.5V level, setting the scope at 500mv/div the signal should cover exactly 5 divisions.

In the XFVP both offset and amplitude are adjusted digitally by pressing the CAL button at any time even with a signal connected at the input. This can be useful in applications were more DC accuracy is needed or where you can’t disconnect the input signal because the probe head is inside a high-voltage protection cage.

AC/DC High Voltage Detector in Modular form

The MVD series of live line AC/DC voltage presence indicators provide a means to detect visually the presence of dangerous voltages in medium voltage lines, capacitors or busbars. The MVD15, MVD25 and MVD30 come in module form easy to be installed in power modules or electric cabinets. Digital multimeters are limited to 1kV DC or AC maximum so there is a need to reliably and safely identify the presence of hazardous voltages in power electronics equipment. Four high intensity red LEDs will blink at a rate greater than 2Hz when the input voltage is higher than the activation voltage. Blink intensity and rate remain constant through the entire activation voltage range. Also, the MVD series of detectors are extremely tolerant to input over voltages.

The MVD30F and MVD25F model provides visual signaling through a 1.5m fiber optic (different lengths available) that carries the light pulse to a panel mounted light pipe, thus avoiding the need for auxiliary supplies on the low voltage area to signal the presence of voltage.

MVD30/MVD25/MVD15 AC/DC Voltage Detector

Flyer MVD/MVDH

HV Detectors in Power Electronics

Specification	MVD15	MVD25	MVD30
Max input voltage DC	1800V	2900V	3500V
Max input voltage AC	1200V	2100V	2500V
Overvoltage DC, 3s	3500V	3100V	4200V
Activation voltage (25C)	85V	20V	130V
LED frequency	2Hz	2Hz	2Hz

Isolated Temperature Probe TM200

The TM200 system allows the remote and safe measurement of temperatures by transmitting digital data over a fiber optic cable. The temperature sensor used is a platinum RTD that is highly accurate and lacks the need to have an external temperature reference (cold junction) typical in thermocouples. Also the sensor is supplied in 3 different terminations to adapt to different customer needs. A great engineering effort has been put on the design of the TM200 transmitter to make it as small as possible, and ease its use in tightly spaced power modules, transformers or electronic cabinets.

The TM200 receiver is fitted in a battery powered handheld enclosure that outputs the temperature as a proportional voltage (10mV/∘C) through a standard BNC connector and whose output can be connected to standard digital multimeters with the supplied cable for a direct temperature reading. Also, the TM200 can be connected to data recorders or a digital oscilloscope configured with a long timebase that will provide direct reading as well as waveform recording capabilities.

Fiber Optic Isolated Temperature Sensor TM200

Flyer TM200

Specification	TM200 System
Conversion resolution	12 bits
Emitter dimensions	6x4x2 cm
Output conversion ratio	10mV/ºC
Max output voltage	3.25V (325ºC)
Element type	Platinum RTD
Sensor cable length	25cm