50MHz DIFFERENTIAL PROBE USER'S MANUAL
Contents
1. 3dB 1 lt 7ns 7MQ 7pF each side to ground 1400V DC Peak AC or 1000Vrms 1400V DC Peak AC or 1000Vrms 1400V DC Peak AC or 1000Vrms CAT II 7V lt IlmV 0 3mVrms 50Q 85dB 60Hz 50dB 1MHz Mains adaptor 6VDC 90mA or 9VDC 70mA or Removable battery pack 4xAA cells or Power leads One jack of 1A current rating Three plugs of 1A current rating 10 to 40 C 30 to 70 C 25 to 85 RH 25 to 85 RH Length of BNC Cable 125cm Length of Input Leads 50cm Weight 400gms Dimensions LxWxH 111mm x 22mm x 14mm Voltage limit is the lesser of the DC Peak AC and RMS values a The supplied voltage must be less than 16V and greater than 3 3V otherwise the probe could be damaged or can t be operated properly b For wrong polarity of power sources a built in circuit will protect the probe and no danger or damage will occur c When the voltage of the cells become too low the power indicator on the panel will change its color and then distinguish 10 Derating Curve The derating curves of the absolute maximum input voltages either input to ground is illustrated as follows 10 1 1 0E 06 1 0E 07 1 0E 08 Frequency Hz 11 Inspection Procedure a Connect the BNC output connector to the vertical input of a general purposed oscilloscope Connect an appropriate power source to this probe and then turn it on Set the oscilloscope to DC coupling and 1 V div Center2. the trace on the display Connect the inputs of the probe to power lines eo Boe p Then a 50Hz 60Hz sine wave or a distorted sine wave for 1 10 attenuation ratio of proper amplitude will be displayed on the screen of the oscilloscope and this means the probe is working properly 12 Cleaning Use a soft cloth to clean the dirt Prevent damage to probe a Avoid immersing the probe b Avoid using abrasive cleaners c Avoid using chemicals contains benzene or similar solvents Lemo and Probus are the registered trademarks Date June 1 2004
3. 4 x AA cells or Power leads Power Supply Probe Body The input leads of the differential probe Sprung Hooks The sprung hooks are connected safely to test points in circuits 6 Power Leads Two types of power leads are offered a Lemo Lead For the oscilloscope whose power connector is Lemo connector b Probus Lead For the oscilloscope whose power connector is Probus connector Power Lead Pa ae 7 0 i ye a Hoe l MS X os 6 2 le ee JAS A Nee P a ior lle IM e U eese H f LN 7 Removable Battery Pack The following figure illustrates the operation of the removable battery pack 8 Extension Plugs for mains adaptor The extension plugs enable one mains adaptor to supply power for three pieces of probes 9 Specifications Attenuation Ratio Bandwidth Accuracy Rise Time Input Impedance Input Voltage Differential Range Common Mode Range Absolute Max Voltage either input to ground Output Swing into 5kQ load Offset typical Noise typical Source Impedance typical CMRR typical Power Requirements Three options of power sources Optional Extension Plugs for Mains Adaptor Input Output Ambient Operating Temperature Ambient Storage Temperature Ambient Operating Humidity Ambient Storage Humidity 1 200 DC to 50MHz
4. SOMHz DIFFERENTIAL PROBE USER S MANUAL This probe is in compliance with IEC 1010 1 IEC 1010 2 031 CAT I or CAT II Pollution Degree 2 1 Safety Terms and Symbols Terms appear in this manual WARNING Warning statements identify conditions or practice that A could result in injury or loss life CAUTION Caution statements identify conditions or practice that A could result in damage to this product or other property Symbols appear on the product 4 A Danger Protective Attention High Voltage Earth Terminal Refer to Manual 2 General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this probe or any products that connected to it Observe Maximum Working Voltage To avoid any injury do not use the probe under following conditions a Attenuation ratio is 1 10 and the voltage between either input lead and earth is above 600Vrms CAT I b Attenuation ratio is 1 100 and the voltage between either input lead and earth is above 600Vrms CAT II c Attenuation ratio is 1 200 and the voltage between either input lead and earth is above 1000Vrms CAT II Must be Grounded This probe is grounded with the shell of BNC connector and an auxiliary grounding terminal through the grounding conductor of the power cord of the measurement instrument Before making connections to the input leads of this probe ensure that the output BNC connector is attached to the BNC connec
5. ower 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 purposed oscilloscope or other measurement instrument and connects the auxiliary grounding terminal to a proper ground The measurement instrument must have a ground referenced b Connect an appropriate power source mains adaptor battery pack or power lead to this probe and then turn it on A WARNING To protect against electric shock use only the accessories supplied with this probe c Using the appropriate probe accessories connect the inputs to the circuits under measurement CAUTION This probe is to carry out differential measurement A between two points on the circuit under measurement This probe is not for electrically insulating the circuit under measurement and the measuring instrument 5 Appearance g mo o The differential probe looks as follows Output Cable The BNC output connector and an auxiliary grounding terminal are connected to the oscilloscope Removable Battery Pack optional 4 x AA cells Power Source Connector This connector can be connected to the following sources Mains adaptor 6VDC 90mA or 9VDC 70mA or Removable battery pack
6. tor of the measurement instrument and the auxiliary grounding terminal is connected to a proper ground while the measurement instrument is properly grounded 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 Do Not Operate Without Covers To avoid electric shock or fire hazard do not operate this probe with covers removed Do Not Operate in Wet Damp Conditions To avoid electric shock do not operate this probe in wet of 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 Circuit To avoid injury remove jewelry such as rings watches and other metallic objects Do not touch exposed connections and components when power is present Use Proper Power Source To use four AA cells or 6VDC 90mA or regulated 9VDC 70mA mains adaptor or power lead Do not operate this probe from a power source that applies more than the voltage specified Do Not Operated With Suspected Failures If you suspect there is damage to this probe have it inspected 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 the differential probe extends the measurement capability of oscilloscopes in electronic p
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