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Instrutech Wasp WGM701, User Manual

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Instrutech Wasp WGM701 User Manual Download Page 25

 

Instruction Manual                                                                                                                   WGM701 Wasp

 

 

InstruTech

 

Page 22 

 

7.4.2

 

Replacing the ionization chamber and sensor activation aid 

 

 

Due to contamination remove the 
ignition aid with the removing tool.

 

 

 

We recommend to rub the inside walls of the measuring chamber up to the groove for the retaining ring to a 
bright finish using a polishing cloth. 

 

 

 

  

CAUTION!  

 

•

 

The sealing surfaces must only be worked 
concentrically. 

•

 

Do not bend the anode.

 

 
 
 
 

 

Insert the new ignition aid into the mounting 
tool with the jagged side downwards

 

…

 

 

 
 
 

 

…

 and slide it onto the anode until 

the stop position is reached. 

 

 

Summary of Contents for Wasp WGM701

Page 1: ...h Cold Cathode Pirani Combination Vacuum Gauge WGM701 Module The Wasp User Manual InstruTech 1475 S Fordham St Longmont CO 80503 USA Phone 1 303 651 0551 Fax 1 303 678 1754 E mail info instrutechinc c...

Page 2: ...ility for any actual use based on the examples and diagrams No patent liability is assumed by InstruTech with respect to use of information circuits equipment or software described in this manual Thro...

Page 3: ...any form or by any means electronic or mechanical including photocopying and recording or by any information storage or retrieval system except as may be expressly permitted in writing by InstruTech P...

Page 4: ...Electrical Conditions 8 2 3 1 Proper Equipment Grounding 8 2 3 2 Electrical Interface and Control 8 2 4 Overpressure and use with hazardous gases 8 2 5 Gas Dependency 9 3 Installation 10 3 1 Mechanica...

Page 5: ...vice 19 7 1 Calibration 19 7 2 Maintenance 19 7 3 Contamination 19 7 4 Removing the gauge from service 20 7 4 1 Inspecting the sensor 21 7 4 2 Replacing the ionization chamber and sensor activation ai...

Page 6: ...WGM701 provides the basic signal conditioning required to turn the sensor into a complete vacuum pressure measurement instrument The built in controller provides a log linear analog output for the me...

Page 7: ...pply unit must be increased proportionally to the length of the cable fuse required 1AT supply voltage ripple 1 Vp p high voltage in measuring chamber operating voltage anode 3 3 KV sensor activation...

Page 8: ...02586 002585 Collector H High Current L Low Current Fittings Flanges C NW25KF D NW40KF F 2 3 4 in CF NW40CF Conflat Electrical Connector A 9 pin D sub male Example WGM701SHDA WGM701 with standard sens...

Page 9: ...emoved WARNING Do not modify this product or substitute any parts without authorization of qualified InstruTech service trained personnel Return the product to an InstruTech qualified service and repa...

Page 10: ...t the internal power supply and other components DO NOT operate the WGM701 with the WGM701 enclosure removed Contact with exposed electrical circuits in the WGM701 could result in death or serious inj...

Page 11: ...ding to EN 61010 VCR connections fulfill this requirement For gauges with a KF connection use a conductive metallic clamping ring WARNING In order to protect personnel from electric shock and bodily h...

Page 12: ...wed to increase above local uncorrected barometric pressure atmospheric pressure side vacuum fittings may release and possible overpressure conditions may cause leaks that would allow the gas inside t...

Page 13: ...the gauge with port down to help minimize the effect of any particles or condensation collecting in the gauge For electrical safety purposes the housing of the gauge must be grounded to the vacuum cha...

Page 14: ...KF flanges metal clamps must be used to ensure proper grounding WARNING The gauge may only be connected to power supplies instruments or control devices that conform to the requirements of a grounded...

Page 15: ...D 3 Analog output Log Linear 0 5 to 7 Vdc 0 5 V decade 4 Power Input 14 5 to 30 Vdc 2 W protected against power reversal and transient over voltages 5 Not assigned 6 Do not connect 7 Analog output com...

Page 16: ...le The two sensors are designed to operate as one combined measuring unit The optimum measuring configuration for the particular pressure range in which measurement is performed is shown below 7 6 x 1...

Page 17: ...off EEPROM error 4 4 Gauge Adjustment The cold cathode measuring circuit which is dominant for low pressures 7 6 10 4 Torr is factory calibrated and cannot be adjusted The HV zero adjustment of the P...

Page 18: ...If the output from the gauge corresponds to 760 Torr the ATM adjustment has been successful Otherwise repeat the adjustment procedure 4 4 2 Pirani HV zero adjustment For adjusting the zero operate the...

Page 19: ...N2 For other gases the measurements have to be corrected Indicated pressure range from 7 6 x 10 3 to 75 Torr Pirani Mode only Gauge calibrated for air p Torr peff Torr 102 8 6 4 2 101 8 6 4 2 100 8 6...

Page 20: ...indication is linear For gases other than air the pressure can be determined by means of the following conversion formula peff K indicated pressure where Gas type K Air N2 O2 CO 1 0 Xe 0 4 Kr 0 5 Ar...

Page 21: ...tage is 10 Vdc when pressure is in the cold cathode measurement but the cold cathode sensor has not ignited Log Linear Analog Output N2 air only Pressure Torr Voltage 1 0E 09 1 0 1 0E 08 1 5 1 0E 07 2...

Page 22: ...ation in the range of 7 6 x 10 5 to 7 6 x 10 3 Torr can cause severe contamination as well as reduced up time Contamination can to a certain extent be reduced by Geometric protection e g screenings el...

Page 23: ...CAUTION Dirt and damage impair the function of the vacuum component Take appropriate measures to ensure cleanliness and prevent damage Touching the product or parts with bare hands increases the desor...

Page 24: ...the retaining ring 1 as well as the ionization chamber 2 from the measuring chamber 3 Check the ionization chamber and the measuring chamber for contamination Ionization chamber is contaminated only...

Page 25: ...ool We recommend to rub the inside walls of the measuring chamber up to the groove for the retaining ring to a bright finish using a polishing cloth CAUTION The sealing surfaces must only be worked co...

Page 26: ...cal stop is reached and mount the retaining ring 1 It is recommend to perform a leak test leak rate 1 10 9 mbar l s Carefully slide the measuring chamber 3 clean or new into the electronics unit 5 unt...

Page 27: ...ics unit 5 until the mechanical stop is reached Pins aligned straight 3 5 4 Fasten the measuring chamber 3 by means of the hexagon socket set screw 4 Perform an ATM and HV adjustment of the Pirani usi...

Page 28: ...put does not drop under below 10 V lid solid green blinking green off Gas discharge has not ignited Wait until the gas discharge has ignited 5 minutes at a pressure of 7 6 X 10 10 Torr Signal output c...

Page 29: ...Alteration or removal of serial numbers or other identification marks renders this warranty void The warranty does not apply to products or components which have been abused altered operated outside...

Page 30: ...p n 002618 100 InstruTech 1475 S Fordham St Longmont CO 80503 USA Phone 1 303 651 0551 Fax 1 303 678 1754 E mail info instrutechinc com www instrutechinc com...

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