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MIT400 Series
Insulation and continuity testers

USER GUIDE

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Содержание MIT400 Series

Страница 1: ...M MIT400 Series Insulation and continuity testers USER GUIDE www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com...

Страница 2: ...nce measurements k Range 19 13 Capacitance measurements 20 Capacitance measurement procedure 20 Distance measurement by capacitance 20 14 Setup options 21 15 Saving recalling and downloading test resu...

Страница 3: ...ting to use the instruments This user guide describes the operation and functions of the MIT400 series of insulation and continuity test instruments These instruments are designed and manufactured by...

Страница 4: ...eads probes and crocodile clips must be in good order clean and with no broken or cracked insulation 8 Ensure that hands remain behind guards of probes clips when testing 9 National Safety Authorities...

Страница 5: ...scharges to a safe level On battery cover see section 2 0 notes 10 and 11 At terminals do not exceed rated input voltage Equipment protected throughout by Double Insulation Class II Equipment complies...

Страница 6: ...need arise 4 2 Case contents all instruments 1 x MIT400 series instrument 1 x Hard carry case 1 x Red black test lead set with clips 5 x AA LR6 batteries fitted 1 x Warranty card 1 x Calibration cert...

Страница 7: ...to confirm that their condition is good with no damaged or broken insulation 2 Check continuity of the test leads by firmly shorting the leads together and read the test lead resistance measurement d...

Страница 8: ...e Note This limit is increased on MIT480 MIT481 and MIT485 to 75 V but a warning buzzer will indicate voltages above 50 V Use extreme care when using or measuring voltages above 30 V particularly in h...

Страница 9: ...ttons Battery internal fuse access panel at rear Result recall and transfer Insulation test ranges OFF positon Resistance ranges Capacitance F Insulation PI test DAR test or timed test button Up down...

Страница 10: ...sting will be automatically inhibited and voltage measurement will be displayed 6 4 Backlight operation All instrument displays are backlit The backlight function can be selected at any time while the...

Страница 11: ...afety 1 Connect the SP5 probe to the instrument using the special 3 pole ve socket in place of the RED test lead 2 Select a suitable insulation resistance range 3 Press and hold down the SP5 probe but...

Страница 12: ...d on the main digital scale in units of V or mV as appropriate In TRMS mode the measured frequency Hz will be simultaneously displayed on the MIT410 MIT420 MIT430 MIT 481 and MIT 40X instruments as sh...

Страница 13: ...witch to the desired test voltage 50 V 100 V 250 V 500 V or 1 kV 3 Press and hold the TEST button to start the test 4 The insulation resistance value in both analogue and digital form is displayed tog...

Страница 14: ...PI 10 minute value 1 minute value c Dielectric Absorption Ratio DAR DAR is the ratio between the insulation resistance values at 30seconds assigned t1 and at 60 second interval assigned t2 i e after...

Страница 15: ...ct the timed test t by pressing PI DAR t function button repetitively until the desired function is displayed Note the test type defaults to insulation resistance when the range switch is moved See fi...

Страница 16: ...10 minutes a second test result is stored t2 The resultant ratio is then displayed on the screen The same procedure applies for the D DAR timed tests however the test duration is 60 seconds with the...

Страница 17: ...tip will be within the stated tolerance of 1 V The MIT40X is supplied with a default setting of 10 V This can be adjusted in the setup procedure between 10 V and 100 V To adjust the insulation test vo...

Страница 18: ...hen enabled the sounder symbol will be shown on the screen display The pass threshold is set to 2 by default but is adjustable as defined in Setup see section 13 Note that the buzzer defaults to OFF o...

Страница 19: ...st procedure refer to Figure 10 Figure 10 Resistance k range 1 Turn the instrument ON by rotating the selector switch to the desired k position 2 Connect the test leads to the isolated conductors unde...

Страница 20: ...Observe the test result displayed automatically 13 2 Distance measurement by capacitance 4 For the MIT481 and MIT485 instrument only cable length is also be displayed in feet km or kft as defined in...

Страница 21: ...20 mA 200 mA default 200 mA All InS Sets low threshold for insulation test buzzer in Mohms Buzzer sounds is result is more than set value 0 5 M 0 5 1 2 5 10 20 M MIT420 MIT40X t Timer for insulation t...

Страница 22: ...hold the TEST button to change the value Each subsequent press increments the limit Holding down the TEST button will automatically increment 4 Changing a value will start the lock symbol flashing Thi...

Страница 23: ...est result is displayed on the instrument display refer to Figure 13 Screen A The test result will remain displayed for one minute during which time the result may be stored 2 Press STORE to record th...

Страница 24: ...displayed Additional information stored with the test result may be viewed using the relevant button For example on insulation test A can be recalled using the A S V key The TRMS key will operate on v...

Страница 25: ...ntification number by using the and buttons then press OK to select 3 The test result will be displayed To scroll through the different measurements used in calculating the PI or DAR ratio use the onl...

Страница 26: ...sition 2 The latest test result will be displayed Where no results have previously been stored the display will indicate this by three dashes 3 Press OK to delete the displayed test result 4 Observe t...

Страница 27: ...ress next button Note that the display now indicates ALL 3 Press OK to delete all the test results Note the progress bar decays as the contents of memory are deleted 4 On completion of the deletion pr...

Страница 28: ...od is to Pair F From the MIT430 MIT485 T To the PC As described in in detail below Users familiar with Bluetooth devices may wish to Pair F From the PC In this case Open your Bluetooth Manager usually...

Страница 29: ...d device will be shown on the auxiliary display 4 Use the keys to scroll round and locate the address that matches the required one shown on Download manager window 5 With the required address display...

Страница 30: ...ts that may be displayed as part of this setup sequence If you get a message bubble or prompt asking you to accept a serial port connection then click and accept ticking the A Always allow check box i...

Страница 31: ...e download button d Switch the instrument to the SND position to initiate the communications port and start the download The download may take a few seconds to start if you have the Auto Detect serial...

Страница 32: ...f the instrument and disconnect the instrument from any electrical circuits 3 To avoid the possibility of electric shock do not press the test button or touch the fuse when changing batteries 4 To rem...

Страница 33: ...d Follow the same procedure as for battery replacement A replacement fuse m must be of the correct type and rating i e 500 mA FF H B C 50 kA min 1000 V 32mm x 6mm 18 Preventive maintenance The MIT400...

Страница 34: ...V Ii 1 mA Test current on load 1 mA at min pass value of insulation specified in BS7671 HD384 and IEC364 EN61152 2 2 mA max EN61557 operating range 0 10 M to 1 00 G Leakage current range 10 A to 2000...

Страница 35: ...ment MIT420 MIT430 MIT481 and MIT485 Measurement range 100 pF to 10 F Accuracy 5 0 2 digits Distance by capacitance MIT420 MIT430 MIT481 MIT485 Arithmetic conversion from capacitance measurement Defau...

Страница 36: ...o 1 G 0 1 per C per G above 1 G Environmental Operating range 20 C to 55 C Operating humidity 95 RH at 0 C to 35 C 70 RH 35 C to 55 C Storage temperature range 30 C to 80 C Calibration Temperature 20...

Страница 37: ...MIT430 and MIT485 Download Manager CD 6111 442 Optional accessories and replacements Fused 2 wire test lead set and crocodile clips 6220 789 Bluetooth Module qualifications details Bluetooth identifie...

Страница 38: ...air and calibration companies which offer excellent in service care for your Megger products Returning your product to Megger UK and USA service centres 1 When an instrument requires recalibration or...

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