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Related Manuals for HT T2000
Summary of Contents for HT T2000
- Page 1 ENGLISH User manual Copyright HT ITALIA 2019 Release EN 3.06 - 10/05/2019...
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Page 2: Table Of Contents
Current measurement (T2000) ................... 16 5.3.1. HOLD ............................16 5.3.2. Anomalous situations ........................16 5.4. Leakage current measurement (T2000) ................17 5.4.1. HOLD ............................17 5.4.2. Anomalous situations ........................17 5.5. Managing the memory ....................... 18 ... -
Page 3: Precautions And Safety Measures
T2000-T2100 1. PRECAUTIONS AND SAFETY MEASURES This manual refers to two models: T2000 and T2100. Further in this manual, the word “instrument” will be used to generically refer to both models unless otherwise specified. The instrument has been designed in compliance with directive IEC/EN61010-1 relevant to electronic measuring instruments. -
Page 4: During Use
During current measurement (T2000), any other current near the clamp may affect measurement precision. When measuring current (T2000), always put the conductor as near as possible to the middle of the clamp jaw, to obtain the most accurate reading. -
Page 5: General Description
Resistance measurement on earth rods with resistive loop method Direct measurement on earth probes without any cable interruption Measurement of leakage current on earth systems (T2000) Setting of alarm thresholds on measurements Storage of measurement results ... -
Page 6: Preparation For Use
T2000-T2100 3. PREPARATION FOR USE 3.1. INITIAL CHECKS Before shipping, the instrument has been checked from an electric as well as mechanical point of view. All possible precautions have been taken so that the instrument is delivered undamaged. However, we recommend rapidly checking it to detect any damage possibly suffered during transport. -
Page 7: Nomenclature
Function key Description HOLD Enables/disables “HOLD” function Enables/disables display backlight Switches to current measuring mode (T2000) A Switches to RS232 mode (T2100) RS232 Increases the alarm threshold value for resistance measurements and is used in memory recall mode ... -
Page 8: Display Description
3. Symbol of noise 4. Symbol of open clamp 5. Symbol of wait 6. Symbol of activeRS232 (T2100) 7. Current measuring unit (T2000) 8. Resistance measuring unit 9. Battery level percentage 10. Alarm resistance unit 11. Alarm resistance threshold or battery level percentage value 12. -
Page 9: Operating Instructions
T2000-T2100 5. OPERATING INSTRUCTIONS 5.1. SWITCHING ON/OFF THE INSTRUMENT CAUTION When switching on the instrument, do not operate the clamp lever, do not open the clamp and do not clamp any cable When message “OL ” appears on the display, it is possible to open the clamp and to clamp a cable being measured ... -
Page 10: Resistance Measurement
T2000-T2100 5.2. RESISTANCE MEASUREMENT CAUTION Measurements carried out by the instrument can be used to evaluate single rods’ resistance values within an earth installation without disconnecting the rods, assuming they do not affect each other. 5.2.1. Operating principle The principle upon which the test carried out by the instrument is based is the “resistive loop resistance measurement”, as shown in Fig.6... -
Page 11: Clamp Operation Check
T2000-T2100 5.2.2. Clamp operation check 1. Press the ON/OFF key to switch on the instrument 2. The displayed message “OL ” indicates that the instrument is ready to carry out measurements 3. Open the jaws gently (the display will show the screen in Fig. 7) and clamp one test loop provided as accessory (see Fig. -
Page 12: Methods For Resistance Measurement On Earth Rods
T2000-T2100 5.2.3. Methods for resistance measurement on earth rods 1. Press the ON/OFF key to switch on the instrument 2. The displayed message “OL ” indicates that the instrument is ready to carry out measurements. 3. Open the jaws gently (the display will show the screen in Fig. 7) and clamp the rod to be measured, then read the result on the display. -
Page 13: Systems Composed Of A Single Rod
T2000-T2100 5.2.3.2. Systems composed of a single rod According to its operating principle, the instrument can only perform measurements on resistive loops. This means that it is not possible to measure systems made of a single rod. In these cases, it is still possible to assess whether the resistance of the rod being tested is... - Page 14 T2000-T2100 (B) Measuring the earth resistance of a rod with the 3-point method In this situation, at an appropriate distance from the rod being tested with RA resistance, there are two independent auxiliary rods with resistance RB and RC, having optimal features in terms of earthing (e.g.: metal pipe, reinforced concrete building, etc…), whose...
- Page 15 T2000-T2100 Fig. 13: Three-point method: third test R3 Under these conditions, assuming that the resistance of the cables connecting the rods is negligible, the following relationships are valid: R1 = RA + RB R2 = RB + RC R3 = RC + RA where the values R1, R2 e R3 are measured by the instrument.
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Page 16: Hold
“HOLD” function and freezes the result on the display (see Fig. 14). To go back to the normal measuring mode press the HOLD key again or press the A (T2000) (RS232) (T2100) or key (toquit “HOLD” and enter resistance or Fig. 14 current measuring mode). -
Page 17: Current Measurement (T2000)
T2000-T2100 5.3. CURRENT MEASUREMENT (T2000) CAUTION Do not measure AC current values exceeding 20A in order to prevent possible electrical shocks and any damage to the instrument. Fig. 19: AC current measurement 1. Press the ON/OFF key to switch on the instrument 2. -
Page 18: Leakage Current Measurement (T2000)
T2000-T2100 5.4. LEAKAGE CURRENT MEASUREMENT (T2000) CAUTION Do not measure AC current values exceeding 20A in order to prevent possible electrical shocks and any damage to the instrument. Fig. 23: Leakage current measurement 1. Press the ON/OFF key to switch on the instrument 2. -
Page 19: Managing The Memory
Fig. 30 Fig. 30 3. Shortly press the A key (T2000), RS232 key (T2100) or key to respectively increase or decrease the number of the memory location and display the saved data or shortly press the MEM key to quit this mode. -
Page 20: Deleting The Internal Memory
Fig. 33: Setting of alarm thresholds in resistance measurement 3. Shortly press the A key (T2000), RS232 key (T2100) or key to respectively increase or decrease the limit value of the alarm threshold in the range: 1 ÷ 199... -
Page 21: Rs232 Communication With A Master Instrument (T2100)
CAUTION The clamp has a RS232 half-duplex serial output and, therefore, it can ONLY be connected to suitable HT instruments. Do not connect the clamp’s serial output to other equipment as this may cause damage to the clamp itself. Fig. 34: Connecting T2100 to a MASTER instrument 1. -
Page 22: Disabling Auto Power Off Function
T2000-T2100 5.8. DISABLING AUTO POWER OFF FUNCTION 1. Press the ON/OFF key (>2s) to switch off the instrument 2. Press both the ON/OFF key and the HOLD key at the same time 3. The “A.P.O no” message is shown on the display for a few seconds (see Fig. 36), the instrument automatically switches on in measuring mode and the “P”... -
Page 23: Maintenance
T2000-T2100 6. MAINTENANCE 6.1. GENERAL INFORMATION 1. While using and storing the instrument, carefully observe the recommendations listed in this manual in order to prevent possible damage or danger during use. 2. Do not use the instrument in environments with high humidity levels or high temperatures. -
Page 24: Technical Specifications
800 1200 (20%rdg + 20) If measured resistance is ≥1200, the display shows “OL” Resistance measuring frequency: >1kHz Measuring range of resistance alarm threshold setting: 1 199 AC TRMS Current (T2000) Range Resolution Accuracy 0.0mA 99.9mA (2.5%lrdg + 1mA) 0.1mA... -
Page 25: Reference Guidelines
7.2.1. Reference guidelines Safety: IEC/EN61010-1, IEC/EN61010-2-032 EMC : IEC/EN61326-1 Earth resistance : IEC/EN61557-4 (partial), IEC60364-6 Appendix C.3 Leakage current (T2000): IEC/EN61557-13 Insulation: double insulation Pollution level: Measurement category: CAT IV 300V, CAT III 600V to earth, Max. 20A 7.2.2. General characteristics... -
Page 26: Service
T2000-T2100 8. SERVICE 8.1. WARRANTY CONDITIONS This instrument is warranted against any material or manufacturing defect, in compliance with the general sales conditions. During the warranty period, defective parts may be replaced. However, the manufacturer reserves the right to repair or replace the product.
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