Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for HT HT2055
Summary of Contents for HT HT2055
- Page 1 ENGLISH User manual Copyright HT ITALIA 2020 Release EN 2.03 - 11/11/2020...
-
Page 2: Table Of Contents
HT2055 TABLE OF CONTENTS 1 PRECAUTIONS AND SAFETY MEASURES ................2 Preliminary instructions ........................2 During use ............................3 After use ............................... 3 Definition of measurement (overvoltage) category ................3 2 GENERAL DESCRIPTION ......................4 ... -
Page 3: 1 Precautions And Safety Measures
HT2055 1 PRECAUTIONS AND SAFETY MEASURES The instrument has been designed in compliance with standards IEC/EN61557-1 and IEC/EN61010-1 regarding electronic measuring instruments. CAUTION For the operator’s safety and to prevent damaging the instrument, follow the procedures described in this manual and carefully read all notes preceded by... -
Page 4: During Use
HT2055 1.2 DURING USE Carefully read the following recommendations and instructions: CAUTION Failure to observe the warnings and/or instructions may damage the instrument and/or its components or generate a danger for the operator Before selecting a new function, disconnect the measuring probes from the circuit ... -
Page 5: 2 General Description
HT2055 2 GENERAL DESCRIPTION The instrument HT2055 you purchased grants accurate and reliable measurements as well as the utmost safety provided it is used in compliance with the indications given in this manual. Thanks to a new concept development it ensures double insulation and, consequently, compliance with the requirements of overvoltage category IV. -
Page 6: 3 Preparation For Use
HT2055 3 PREPARATION FOR USE 3.1 INITIAL INSPECTIONS Before shipment, the instrument’s electronics and mechanics were inspected. All possible precautions were taken to permit delivery of instrument free of damage. However, we recommend generally inspecting the instrument in order to detect any damage suffered during transport. -
Page 7: 4 Description Of Parts
HT2055 4 DESCRIPTION OF PARTS 4.1 HT2055S STATION UNIT DESCRIPTION Fig. 1: HT2055S unit description CAPTION: Protection fuse on mains (see § 11.1) Switch for supply voltage selection (110/230V) ON/OFF key to switch the instrument ON or OFF Input connector for mains cord... -
Page 8: Description Of Test Leads
HT2055 4.2 DESCRIPTION OF TEST LEADS 4.2.1 Front view Fig. 2: HT2055M unit front view description CAPTION: ESC key to return at previous screen MEM key for access to internal memory (see § 8) , , , arrow keys and TEST key to activation measurements... -
Page 9: Backside View
HT2055 4.2.3 Backside view Fig. 4: HT2055M unit backside view description CAPTION: Battery compartment cover Safety information label Fixing screws for battery compartment cover Fig. 5: HT2055M battery compartment description CAPTION: Serial number label Battery cells (6x1.2V NiMH type AA) -
Page 10: 5 Initial Operations With Ht2055M Unit
HT2055 5 INITIAL OPERATIONS WITH HT2055M UNIT Press the function keys to display the below screens relative to the Step Voltage, Contact Voltage and Settings (see Fig. 6) Fig. 6: Screens of general menu 5.1 SETTINGS The below operations are possible within Settings menu: ... -
Page 11: Synchronization
HT2055 5.1.3 Synchronization Selecting this option will allow to upload different data from the station unit to the meter unit. The possible options are: Synchronization of the actual time/date and the generated current Uploading of test current results for Step / Contact voltage calculation ... -
Page 12: Default Settings
HT2055 5.1.4 Default settings This section permits to restore the default value (factory) of measurement parameters and limits set on the instrument Fig. 10: Initial settings screen 1. Press keys to enter Settings menu 2. Select the item “Initial Settings” with the or keys and press TEST key 3. -
Page 13: 6 Initial Operations With Ht2055S Unit
HT2055 6 INITIAL OPERATIONS WITH HT2055S UNIT Press the function keys to display the below screens relative to the earth/resistivity measurements and Settings (see Fig. 12) Fig. 12: Screens of general menu 6.1 SETTINGS The below operations are possible within Settings menu: ... -
Page 14: Setting Output Power
HT2055 6.1.2 Setting output power This section permits to set the output power of current generator by selecting the percentages: 10%, 25%, 50%, 75% and 100% Fig. 14: Output power generator setting screen 1. Press keys to enter Settings menu 2. -
Page 15: Adjust Contrast Of Display
HT2055 6.2 ADJUST CONTRAST OF DISPLAY 1. Press the key. The following screen is shown: 2. Use the or keys to reduce or increase the contrast percentage of display 3. Press the TEST key to confirm the operation or the ESC key to exit from this function 6.3 HELP SCREENS... -
Page 16: 7 How To Perform The Measurements
HT2055 7 HOW TO PERFORM THE MEASUREMENTS 7.1 THEORY OF STEP/CONTACT VOLTAGE MEASUREMENTS An earth electrode / grid depleted into ground has a certain resistance, depending on its size, surface (oxides on the metal surface) and the soil resistivity around the electrode. -
Page 17: Step/Contact Voltage Measurement
HT2055 7.2 STEP/CONTACT VOLTAGE MEASUREMENT The measurements of step/contact voltage are performed by a voltmeter with an internal resistance of 1k simulating the body resistance and with two weight probes of 25 kg each simulating feet. Alternatively it is possible to use two metal plates instead of weight probes on the ground where the operator stands. - Page 18 HT2055 Fig. 17: Circuit scheme for step voltage measurement Fig. 18: Circuit scheme for contact voltage measurement Generation of test current 3 Switch on the station unit HT2055S 4 Use keys and select the “CURRENT GEN.” screen (see Fig. 19) Fig.
- Page 19 HT2055 5 Press TEST key to activate the operation. The value of generated current is displayed. Check this value. CAUTION The output power is set automatically to its available maximum value (see § 6.1.2) Completely unwind measuring cable to avoid affecting test current value (coil impedance) ...
- Page 20 HT2055 Perform step/contact voltage measurements 8 Use keys and select the CONTACT VOLT or STEP VOLT measurements on the meter unit Fig. 21: Screens for step/contact voltage measurements 9 Use ,, and keys and perform the settings of the following test parameters: Test current (manual setting considering the range 0.20A ÷...
- Page 21 HT2055 Synchronization between the units after the test (recommended) If the meter and station units were synchronized during the measurements they should be synchronized again after completing the tests. In this step the values of generated currents (measured with the station) are downloaded to the meter so automatically correcting the measured results previously stored and providing the correct value of step and contact voltages.
-
Page 22: Earth Resistance Measurement
HT2055 7.3 EARTH RESISTANCE MEASUREMENT The earth resistance measurement is performed by the HT2055S station unit only by using the standard 3-wire method with two supplied auxiliary probes fitted at adequate distances from the earth system under test according to the Fig. 24 Fig. - Page 23 HT2055 5 Use keys and select the EARTH RE measurement on the station unit. The following screen is displayed: Fig. 25: Main screen of earth resistance measurement 6 Press TEST key to perform the measurement. The result is displayed Fig. 26: Result screen of earth resistance measurement Where: R ...
-
Page 24: Ground Resistivity Measurement
HT2055 7.4 GROUND RESISTIVITY MEASUREMENT For the ground resistivity measurement the test current is injected through two current probes (C1/H and C2/E). The voltage probes S and ES must be placed between the current probes (equidistance ‘a’ between probes must be considered). Using different distances between the test probes means that the material is measured at different depths. - Page 25 HT2055 CAUTION When starting test the unit performs a preliminary check of the resistance values of current probe (Rc) and voltage probe (Rp) stopping the test if these values are assumed to be too high and giving the messages “Rc: >2.0k”...
-
Page 26: 8 Operation With Memory
HT2055 8 OPERATION WITH MEMORY The measurement results, including associated parameters, can be saved inside the internal memories of station unit and meter unit. In particular: The step/contact voltage measurements can be saved in the meter unit The earth resistance/ground resistivity measurements can be saved in the station unit and then transferred to the meter unit ... -
Page 27: Saving Results
HT2055 Measurement structure No.: 1 Number of measurements associated to the selected location Number of measurements in the selected location No.: 1 [13] [Number of measures in the selected location and sub-locations] Number of selected test / Number of all results saved in the >... -
Page 28: Delete Saved Results
HT2055 8.3 DELETE SAVED RESULTS The following operations are available: Deletion of all memory Deletion of data in single selected locations Deletion of generated currents (only for station unit) Deletion of internal memory 1 Selected the item “MEMORY CLEAR ALL MEMORY” inside settings menu (see §... -
Page 29: 9 Connection Of The Instrument To Pc
HT2055 9 CONNECTION OF THE INSTRUMENT TO PC The saved data can be transferred to PC by using the TeraView software provided with instrument. TeraView software permits the following operations: Download data from meter Define customized settings on the final report ... - Page 30 HT2055 8. Select the “Config COM Port…” command and click on the “AutoFind” button to start the automatic detection of the instrument (see Fig. 37) Fig. 37: Connection of the instrument to PC 9. The herewith message means a correct detection of meter by the PC Fig.
-
Page 31: 10 Maintenance
HT2055 10 MAINTENANCE CAUTION During use and storage, carefully observe the recommendations listed in this manual in order to prevent possible damage or dangers during use Do not use the instrument in environments with high humidity levels or at high temperatures. -
Page 32: 11 Technical Specifications
HT2055 11 TECHNICAL SPECIFICATIONS Accuracy is calculated as ±[%rdg + (number of dgt* resolution)] at reference condition indicated in § 11.2 Step/Contact voltage measurement (unit HT2055M) Measured voltage range Resolution Accuracy 0.01 19.99mV 0.01mV 20.0 199.9mV 0.1mV 200 1999mV (2.0rdg + 2dgt) -
Page 33: General Characteristics
HT2055 11.1 GENERAL CHARACTERISTICS Station unit HT2055S Power supply: 115V/230VAC (±10%), 50/60Hz Max. power consumption: 750VA Protection on mains: 2x fuse T 6.3A / 500V (6mm x 30mm) Safety of meter: IEC/EN61010-1, IEC/EN61557-1 Safety of accessories: IEC/EN61010-031 Installation over 1kVAC:... -
Page 34: Environment
HT2055 11.2 ENVIRONMENT Reference temperature: 10°C ÷ 30°C ; (50°F ÷ 86°F) Reference humidity: 35% ÷ 65%RH Operating temperature: 0°C ÷ 40°C ; (32°F ÷ 104°F) Operating humidity: <85%RH Storage temperature: -10°C ÷ 60°C ; (14°F ÷ 140°F) Storage humidity: <80%RH... -
Page 35: 12 Service
HT2055 12 SERVICE 12.1 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.
Need help?
Do you have a question about the HT2055 and is the answer not in the manual?
Questions and answers