inclinometer reference frame user manual
Contents
1. 10 and 10 average readings ignoring the minus sign and dividing by 2 to obtain the mean value 3 02 For the B Axis Repeat procedure above with the probe rotated 90 facing forward within the Reference Access Tube Since this is the secondary axis the reading repeatability may be reduced to 0 2mm It is unlikely that the probe will drift over its lifetime however if dropped or damaged it is prudent to check that it is reading correctly It should be emphasised that the integrity of the calibration check is dependent upon the frame remaining securely fixed in a stable position for the monitoring term If you cannot obtain reliable data or the average readings do not equal those expected please contact itmsoil for assistance User Manual INCLINOMETER REFERENCE FRAME USER MANUAL Appendix A Figure 1 Inclinometer Reference Frame 4 Access Tube sition 10 Degree position 10 Degree position User Manual INCLINOMETER CALIBRATION FRAME USER MANUAL _ Soil Instruments Ltd User Manual2. INCLINOMETER REFERENCE FRAME USER MANUAL itmsoil INCLINOMETER REFERENCE FRAME USER MANUAL Man 155 2 0 0 23 10 2006 C Rasmussen P Day Chris Rasmussen Manual No Revision Date Originator Checked Authorised for Issue User Manual INCLINOMETER REFERENCE FRAME USER MANUAL Contents Section L M ect Introduction 3 Section 2 1 oo Mounting the Reference Frame 4 Checking Procedure 5 3 01 FOF Cie 5 3 02 For tlie B AXIS 5 Figure 1 Inclinometer Reference Frame Error Bookmark not defined User Manual INCLINOMETER REFERENCE FRAME USER MANUAL Section 1 Introduction The following procedure details the mounting of the Reference checking Frame and how to conduct a routine calibration check The Reference Frame is primarily intended for checking that the inclinometer readings are repeatable over the lifetime of the equipment This is carried out by periodically checking the inclinometer systems readings at zero 10 and 10 to ensure they have not altered The frame is to be mounted in the vertical position using the Inclinometer System which is to be eventually monitored Consequently it is of paramount importance that the frame is mounted in a structurally sound position which is not subjected to vibration and is protected from physical disturbance User Manual INCLINOMETER REFERENCE FRAME USER MANUAL Section 2 Mo
3. onfirm the zero reading If not remember that the average of the readings should be 0 1mm i e 0 3 one direction and 0 4 on the other direction If the average is within 0 1mm the frame is mounted vertically The B axis should be within 0 5mm if not shim between the frame and the wall until better than 0 5mm is achieved then re measure the A axis Final adjustments are to be made accordingly without subjecting the frame and probe to mechanical shock and the frame fastened securely Record readings achieved for future reference User Manual INCLINOMETER REFERENCE FRAME USER MANUAL Section 3 Checking Procedure 3 01 For the A Axis Ensure probe and probe wheels are clean and insert it into Reference Access Tube with the leading wheel facing to the left note the zero reading 0 1 Rotate the Reference Access Tube to the 10 position Rotate the Reference Access Tube to the 10 position Remove the probe rotate it through 180 and re insert it into the calibration access tube with the leading wheel facing to the right Rotate the Reference Access Tube to the 10 position Rotate the Reference Access Tube to the 10 position Calculate the average of the readings taken at the 10 position It should be 86 8mm 0 1mm Likewise at the 10 position the average should be 86 8mm 0 1mm Note If the Reference Frame is not absolutely vertical any plus minus error will cancel out when adding the
4. unting the Reference Frame Please refer to Appendix A figure 1 Inclinometer Reference Frame Suspend the apex of the frame on a vertical wall approximately 1m above ground level using a single anchor bolt located immediately above the fulcrum point Ensure the nut on the anchor bolt is only finger tight so that the frame can hang freely and via gravity find a near vertical position Connect up the Inclinometer System and place the probe in the Reference Access Tube with the leading wheel first wheel to enter the tube pointing to your left and at 90 degrees to you Switch the reel and then the PDA on and allow 15 minutes for the probe to stabilise Ensure the reference tube is in the zero degree middle position Rotate the frame about the upper anchor point until zero deflection is registered in direction A on the PDA and carefully marks the positions for the two lower anchor bolt holes Remove the probe from the Reference Access Tube rotate the frame and drill and locate the remaining anchor bolts Mount the frame in position ensuring all anchor bolt nuts are 1 4 turn over finger tight sufficient to firmly hold the frame but not to twist or distort it Insert the probe as above into the calibration tube ensure that the frame is aligned correctly zero 0 1mm is practical and gently tighten the mounting nuts a further 1 2 to 1 turn Remove probe rotate 180 and reinsert so that the leading wheel points to the right this should c
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