ETCR7300_7300A Manual
Contents
1. measurement mode of max and min return to normal measurement mode e When the current exceeding measurement range OL A symbol will display 5 Single phase active power P reactive power Q apparent power S measurement fy COM P1 4 00 KW Q1 0 00 kvar 51 4 00 KVA 0001 Black Yellow 14 a Press IMODE key to switch the mode to active power reactive power apparent power measurement state Show as the above LCD display b Connect wires according to Table 1 press p1 p2 key to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into interface c Clamp the to be measured wire d The first row on the LCD displays the corresponding active power while the second and third row respectively displays the corresponding reactive power and apparent power e Long press A key V key for seconds when max or min displayed at the right bottom of the LCD it is to measure the maximum or minimum values And then press A key V key for seconds to exit the measurement mode of max and min return to normal measurement mode f When the power exceeding measurement range OL symbol will display g When the measured voltag2. Mcas rement Range Accuracy Resolution 7300 7300A 7300 7300A 0 00V 9 99V 0 01V 10 0V 99 9V 1 5 5dgt 0 1V 100V 600V 1V 3 AC Current I Measurement Accuracy Resolution Range 7300 7300A 7300 7300A 0 00mA 9 99mA 1 5 5dgt m 0 01mA 10 0mA 99 9mA 1 5 5dgt 0 1mA EE 100mA 999mA 1 5 5dgt 2 0 5dgt 1mA 0 1A 1 00A 9 99A 1 5 5dgt 2 0 5dgt 0 01A 0 1A 10 0A 99 9A 1 5 5dgt 2 0 5dgt 0 1A 0 1A 100A 1199A 2 0 5dgt 2 0 5dgt 1A 1A 1200A 2000A m 2 5 5dgt E 1A 4 Frequency F Measurement Accuracy Resolution Range 7300 7300A 7300 7300A 25Hz 100Hz 0 5 5dgt 0 1Hz 5 Active Power P W VXAXCOS Measurement Accuracy Resolution Range 7300 7300A 7300 7300A 0 50W 9 99W 3 5dgt 0 01W 10 0W 99 9W 1 3 5dgt 0 1W 0 10KW 9 99KW 3 5dgt 3 5dgt 0 01KW 0 01KW 10 0KW 99 9KW 3 5dgt 3 5dgt 0 1KW 0 1KW 100KW 719KW 3 5ddgt 3 5ddgt 1KW 1KW 720KW 1200KW IER 4 5dgt ao 1KW 6 Apparent Power S VA VX A Measurement Accuracy Resolution Range 7300 7300A 7300 7300A 0 50VA 9 99VA 3 5dgt 0 01VA 10 0VA 99 9VA 3 5dgt 0 1VA 0 10KVA 9 99KVA 8 5dgt 3 5dgt 0 01 0 01KVA 10 0KVA 99 9KVA 8 5dgt 3 5dgt 0 1KVA 0 1KVA 10
3. 11 VII Battery Replacement nenne 22 Vil nn t e E TREE eS A AA 22 A Warning A Thank you for purchasing our ETCR7300 Series Large Caliber Three Phase Power Tester in order to better use of this product be sure to To read this user manual carefully Comply strictly with safety rules and precautions set out in this manual u Pay special attention to safety under any circumstances while using the instrument u Take note of the label text and symbols on the panel and back of the instrument u Keep the clamp clean and maintain regularly u Please don t connect the tester with computer via RS232 during voltage measurement u Please don t place and store the instrument at the place with high temperature humidity moisture condensation and straight sunlight for a long time u Replace battery in time when the battery voltage is low u Remove or replace the battery if you expect not to use the instrument for a long time u Take note of the polarity when replace the battery u The operation demolition calibration and maintenance of the instrument must be carried out by qualified personnel authorized to do so u The meter should be stopped from being used immediately and sealed if danger is brought up in case of continued use only a competent body can be authorized to deal with it u A in the manual is the safety warning sign the contents
4. LARGE CALIBER THREE PHASE POWER TESTER ETCR 7300 ETCR 7300A gt c MANUAL ETCR Electronic Technology Company CONTENT Warn lng 3 eerte ld eiie eda edite 1 Tdntroductions he ee he su 2 The Model tind tee AS 3 Electrical 5 2 sse 3 IV Technical Specification sse 3 V Measurement Accuracy sssensnsnnensensensnennsensnnensnsennnenn 5 1 Base Conditions and Working Conditions 5 Za AC Voltage UN 2 doeet ee ee eg 6 S AC Current eh beste bt ios 6 As Ere quency Eee tet ia een 6 5 Active Power P W 6 6 Apparent Power S 2 2 2 0011 7 7 Reactive Power VAR 7 8 Power Factor PF PF W 7 9 Phase Angle i ciere tede xe e dias 7 10 Power Energy W sie oe een ee e eet 8 Vie Instrument Structure eae US 8 VII Method of Operation 10 E SWR ONO oaeeo treten 10 2 Choose measurement 10 3 Max and Min 10 4 Backlight Control en nee lets ete erbe 10 5 Data Hold Storag tne eee eig 10 6 Data Acces Exits cie AA Y RENT dun vas 11 8 Delete Data asso A b I 11 9 Measurement
5. For example the phase angle between U1 and U2 is U1U2 120 0 18 d When the measured voltage in the range of 10V 5V and the measured current in the range of 50mA 20mA the measurement error will be doubled When the voltage below 5V or the current below 20mA the tester will display U11 360 0 10 Frequency of three phase voltage and current F measurement coM F Hz U1 50 0 U2 50 0 U3 50 0 1 50 0 MEM 0000 Green Yellow a Press MODE key to switch the mode to frequency measurement state Show as the above LCD display b Connect wires according to Table 1 press p1 p2 key to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into interface c Clamp the to be measured wire d The LCD displays corresponding phase angle For example U1 50 0Hz e When the measured voltage in the range of 10V 5V and the measured current in the range of 50mA 20mA the measurement error will be doubled When the voltage below 5V or the current below 20mA the tester will display U1 0 0 19 11 Phase sequence of three phase voltage measurement 01 02 03 COM U1 U2 U3 0000 Green Yellow a Press MODE key to switch the mode to phase sequence measurement state Show as the abov
6. press p1 p2 p3 key to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into interface c The first row on the LCD displays the corresponding voltage V key for seconds when max or min d Long press key or displayed at the right bottom of the LCD it is to measure the maximum or minimum voltage And then press A key or key for seconds to exit the measurement mode of max and min return to normal measurement mode e When the voltage exceeding 600V OL V symbol will display 2 Single phase AC current I measurement a Press U1 00 0 V 1 50 0 A PF1 0 000 MEM 0000 2 MODE key to switch the mode to voltage current power factor measurement state Show as the above LCD display 12 b Clamp the to be measured wire c The second row on the LCD displays the current d Long press A key V key for seconds when max or min displayed at the right bottom of the LCD it is to measure the maximum or minimum current And then press A key V key for seconds to exit the measurement mode of max and min return to normal measurement mode e When the current exceeding measurement range OL A
7. RS232 interface upload stored data to the computer through the system software implementing online real time monitoring historical inquires dynamic display With the function of historical data read preserve print and backlight data hold etc It is a necessary tool for electrical safety testing 2 II Model Model Measurement Range Resolution Note ETCR AC0 00mA 1200A 0 01mA Can measure leakage 7300 AC 0 5W 720KW 0 01W current low power AC 0 0A 2000A 0 1A Can measure big current ETCR 7300A high power Can t AC 0 1K 1200KW iW measure leakage current Note Other function is the same III Electrical Symbols K Extremely dangerous The operator must strictly abide by the safety rules otherwise there is risk of electric shock resulting in bodily injury or fatalities Dangerous The operator must strictly abide by safety rules otherwise there is risk of electric shock resulting in bodily injury or fatalities Warning Safety rules must be strictly abided by otherwise personal injury or equipment damage may be caused lo Alternate Current AC Direct Current DC Double Insulation IV Technical Specification Function Measure three phase AC voltage leakage current current active power reactive power apparent power power phase between current and voltage phase between phase voltage frequenc
8. key Power ON OFF Aj key Open Close the backlight increase the page number by one U key Left move the cursor sum up the three phase power 6 MODEJ V key Switch the measurement mode 7 kinds of different modes decrease the page number by one 7 LCD display See the below details 8 U1 voltage input 9 U2 voltage input 10 RS232 interface upload data to computer 11 U3 voltage input 12 Public input of three phase voltage COM 13 p3 CLR key Choose to measure phase voltage or power clear date storage 14 Opening lever eM key Access Exit data reading 16 2 key Choose to measure p2 phase voltage or power right move the cursor 17 491 key Choose to measure q1 phase voltage or power 18 Up and down cover connecting screws 19 Battery cover 20 Battery cover screw 21 Test wires LCD Display 1 P1 50 0 KW 2 Q1 0 00 Kvar 3 51 50 0 KVA 4 MEM 0003 max 5 6 7 8 1 The first row on the LCD display the measurement value 2 The second row on the LCD display the measurement value 3 The third row on the LCD display the measurement value 4 The fourth row on the LCD display states 5 Low power indicator display when the batteries don t have enough power 6 State indicator MEM indicating data store HOLD indicating data hold READ indicating historical data access 7 Data group number 8 max indicating the maximum val
9. measurement state Show as the above LCD display b Connect wires according to Table 1 press p1 p2 key to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into interface c Clamp the to be measured wire d The LCD displays corresponding phase angle For example the phase angle between U1 and is U11 359 8 the other two phase have not connect voltage U2 U3 so its phase angle display 0 or 360 0 0 is same with 360 0 17 e When the measured voltage in the range of 10V 5V and the measured current in the range of 50mA 20mA the measurement error will be doubled When the voltage below 5V or the current below 20mA the tester will display U11 360 0 U1I 359 8 U2I 119 8 239 8 MEM 0000 9 Phase angle between three phase AC voltage U1 U2 U3 gt measurement n 02 03 COM U1U2 120 0 0203 120 0 U3U1 120 0 0000 a Press MODE key to switch the mode to phase angle between voltages measurement state Show as the above LCD display b Connect wires according to Table 1 press p1 p2 key to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into COM interface c The LCD displays corresponding phase angle
10. symbol will display 3 Single phase AC leakage current 1 measurement U1 0 00 V 1 1 20 mA PF1 0 000 MEM 0000 a Press MODE key to switch the mode to voltage current power factor measurement state Show as the above LCD display b Clamp the live wire and null line of single phase c The second row on the LCD displays the leakage current d Long press A key V key for 3 seconds when max or min displayed at the right bottom of the LCD it is to measure the maximum or minimum current And then press A key V key for seconds to exit the measurement mode of max and min return to normal measurement mode e When the current exceeding measurement range OL A symbol will display 313 4 Three phase leakage current I measurement U1 0 00 V 1 1 20 mA PF1 0 000 MEM 0000 a Press key to switch the mode to voltage current power factor measurement state Show as the above LCD display b Clamp three wires or four wires of the three phase together c The second row on the LCD displays the leakage current d Long press key or V key for seconds when max or min displayed at the right bottom of the LCD it is to measure the maximum or minimum current And then press A key V key for seconds to exit the
11. 0KVA 720KVA 3 5dgt 3 5dgt 1KVA 1KVA 720KVA 1200KVA 4 5dqgt 2258 1KVA 7 Reactive Power VAR VX AX sin Measurement Accuracy Resolution Range 7300 7300A 7300 7300A 0 50var 9 99var 3 5ddgt 0 01var 10 0var 99 9var 3 5ddgt 0 1var 0 10Kvar 9 99Kvar 8 5dgt 3 5dgt 0 01Kvar 0 01Kvar 10 0Kvar 99 9Kvar 3 5dgt 3 5ddgt 0 1Kvar 0 1Kvar 100Kvar 719Kvar 3 5ddgt 3 5ddgt 1Kvar 1Kvar 720Kvar 1200Kvar Er 4 5dgt pet 1Kvar 8 Power Factor PF PFZW VA Measurement Range Accuracy Resolution 7300 7300A 7300 7300A Bases oi GRD 10 02 9090 9 001 9 Phase Angle Measurement Range Accuracy Resolution 7300 7300A 7300 7300A 0 0 360 0 1 5 5dgt 0 1 10 Power Energy W Accuracy Resolution Measurement Range 7300 7300A 7300 7300A 0 0000KWh 9 9999KWh 3 5dgt 4 5dgt 0 0001KWh 10 000KWh 99 999KWh 8 5dgt 4 5dgt 0 001KWh 100 00KWh 999 99KWh 8 5dgt 4 5dgt 0 01KWh 1000 0KWh 9999 9KWh 3 5dgt 4 5dgt 0 1KWh 10000KWh 72000KWh 8 5dgt 4 5dgt 1KWh VI Instrument Structure 4 N 4 1 1 2 Clamp 80mmx80mm switch MAX MIN measurement states 3 4 5 HOLD key Data hold and store POWER
12. e LCD display b Connect wires according to Table 1 press p1 p2 key to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into interface c If no default phase the phase sequence will display The cursor flashing in order of U1 U2 U3 means positive phase sequence and in order of U3 U2 U1 means negative phase sequence If there is a default phase or voltage below 5V the corresponding cursor won t display 12 Total active power reactive power apparent power power factor CP Q S PF of three phase measurement 93 Total Power P 90 0 KW _ S 90 1 KVA v com MEM 0000 23 Total Power Q 5 00 Kvar PF 0 998 MEM 0000 gt Green Yellow a Press IMODE key to switch the mode to active power reactive power apparent power measurement state Show as the above LCD display b Connect wires according to Table 1 press 1 2 key to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into interface c Clamp 1 wire press p1 key to switch the mode to q1 phase power measurement state press key to record the power of phase 21 symbol displays at the right bottom of LCD And then repeat t
13. e in the range of 10V 5V and the measured current in the range of 50mA 20mA the measurement error will be doubled When the voltage below 5V or the current below 20mA the tester will display 0 00W 0 00var 0 00VA 6 Single phase power factor PF1 PF2 PF3 measurement coM U1 80 0 V 1 50 0 A PF1 0 999 MEM 0001 Black Yellow a Press MODE key to switch the mode to active power reactive power apparent power measurement state Show as the above LCD 15 display b Connect wires according to Table 1 press p1 p2 key to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into interface c Clamp the to be measured wire d The third row on the LCD displays the corresponding power factor e When the measured voltage in the range of 10V 5V and the measured current in the range of 50mA 20mA the measurement error will be doubled When the voltage below 5V or the current below 20mA the tester will display PF1 0 000 7 Single phase power energy W1 W2 W3 measurement 7 7 A W1 0 8020KWh TIME 35 28mins MEM 0001 a Press MODE key to switch the mode to power energy measurement state Show as the above LCD display b Connect wires according to Table 1 press 1 p2 p3 k
14. ent mode 4 Backlight Control After booting press key to control the backlight suitable for dim places and night default closed after booting 5 Data Hold Storage In all the modes except phase sequence measurement press HOLD key to lock currently displayed value and display HOLD symbol At the same time this locked value as a set of data followed by auto ID and store display the group number such as HOLD 0003 and then press HOLD key to cancel the lock HD symbol disappear then continue to measure Loop operation the meter can store 200 sets of data If the memory is full 10 display FULL symbol MEM 0003 displays in test mode means there have 3 groups stored data 6 Data Access Exit In test mode press MEM key to access data inquiry form group READ 001 and display READ symbol It is allowed to rapidly navigate to the desired page number Press A key to increase the page number by one press V key to decrease the page number by one Press lt key to decrease the page number by ten when the pages is less then ten please change to use the V key Press D key to increase the page number by ten when the left pages is less than ten please change to use the A key Press MEM key to exit date inquiry 7 Data Upload Connecting the meter and c
15. ey to switch the phase and insert the testing pens Yellow Green Red into U1 U2 U3 interface insert the black pen into interface c Clamp the to be measured wire d The first row on the LCD displays the corresponding power energy while the second row displays the measurement time with unit of mins minutes and seconds when less than 1 hour and hmin hours and minutes when more than 1 hour 16 e When the power energy exceeding measurement range OL symbol will display When measuring power energy the tester won t power off automatically after 15 minutes it can be used for 100 hours Press HOLD key to store the data meanwhile the measurement is going on until press MODE key to exit When press 01 2 p3 key to switch the phase the timer and the power energy value will be cleared restart to measure again f When the measured voltage in the range of 10V 5V and the measured current in the range of 50mA 20mA the measurement error will be doubled When the voltage below 5V or the current below 20mA the tester will display W1 0 0000KWh 8 Phase angle between voltage U1 U2 U3 and current measurement Pa 01 COM U11 359 8 021 360 0 U3I 360 0 0000 Black Yellow Press MODE key switch the mode to phase angle between voltage and current
16. hang Zhifu Road J iahe Baiyun District Guangzhou Guangdong China Post Code 510440 Tel 86 20 62199556 62199553 Fax 86 20 62199550 E mail info etcr cc Website www etcr cc
17. he same steps to measure the power of 2 and q3 the total power will automatically sum up when 23 displays on the LCD d The total active power P reactive power Q apparent power S power factor PF displays in two pages on LCD page turns every 5 seconds High voltage very dangerous Only qualified personnel after training could conduct operation on it The operator should obey safety regulations Otherwise there will be the danger of electric shock resulting in personal injury or casualty A Dangerous Can not be used to test voltage higher than 600V Otherwise there will be the danger of electric shock resulting in personal injury or casualty Please don t measure the current which exceeding the measurement range in case damage the tester Make sure the clamp well closed when measuring leakage current and current Make sure the measured wire at approximately the geometric center of the clamp Clean the clamp after finishing measurement regularly maintain the meter Be sure to connect test wires correctly when measuring voltage to avoid short circuit After measuring voltage should firstly take the test line away from measured wire and then draw from meter in order to avoid shock 5242 Clamp live wire and null line together to measure AC leakage current of single phase Note 2 wires Clamp earth wire to measure grounding line leakage curre
18. midity Storage Temperature 10 C 60 C below 70 rh and Humidity a AC 3700V rms between core and shell Safety IEC1010 1 IEC1010 2 032 2 class of pollution CAT Specifications 600 4 V Measurement Accuracy 1 Base Conditions and Working Conditions Base Working Influence Quantity Model Condition Condition Note Ambient Tem 1200 23 1 10 40 p 7300A A 7300 m Ambient Humidity 7300A 4096 6096 8096 7300 i Signal Waveform 7300A sine wave sine wave 0 01 Signal Frequenc 7300 50HZ 1HZ 45HZ 65HZ g quency 7300A Current Amplitude in Power Power E zl Energy Phase Phase 7300 5A 0 1A 50mA 1200A Sequence Test Current Amplitude in Power Power 10A 2000A Energy Phase Phase T300A ASA 2000 Sequence Test Voltage Amplitude in Power Power 7300 meee Energy Phase Phase 7300A PON Se Sequence Test Power Curent Amplitude 50mA 1200A factor in Power Factor Test 0 3 1 Power dador 50A 1A 10A 2000A factor in Power Factor Test 0 3 1 Voltage Amplitude in 7300 Power Factor Test 7300A rid 198008 External Electric 7300 Magnetic Field 7300A Tore avoldes Measured Wire 7300 Measured wire at approximately the Position 7300A geometric center of the clamp 2 AC Voltage U
19. nt of electric equipment Note single wire Clamp four wires or three wires of there phase to measure the total leakage current Note 4 wires or 3 wires Clamp main line to measure total current of that main line Note single wire VI Battery Replacement Warning Make sure the battery cover is well closed before measurement otherwise there will be danger Take note of the battery polarity otherwise it may cause damage to the instrument If the battery power is not enough please change in time Take out the batteries if you expect not to use the meter for a long time 1 7 that th is displayed when the power voltage is lower than 5 2V indicating e battery should be replaced 2 Press POWER key make sure the meter is power off Loosen the battery cover then ti screw open the plate replace new batteries and cover the plate ghten screw 3 Press POWER key to check whether the batteries are successfully replac ed repeat step 2 if it doesn t work Vil Accessories Main Unit 1 piece Meter Box 1 piece Test Wires 4 pieces Yellow Green Red Black RS232 Data Wires 1 piece Disk 1 piece Battery 4 pieces Alkaline Dry Battery LR6 User Manual 1 piece Guarantee Card 1 piece Certification 1 piece 22 A Manufactured by ETCR Electronic Technology Company Address F 3F No 4 Pengs
20. of this manual must be followed for safe operation u and other safety signs the contents of this manual must be followed for safe operation I Introduction ETCR7300 Series Large Caliber Three Phase Power Tester is well designed and manufactured for measuring three phase AC voltage current leakage current phase between current and voltage phase between phase voltage frequency power energy phase sequence active power reactive power apparent power power It is a multifunctional digital intelligent tester Its large caliber 80mm X 80mm can clamp electric cable of 80mm diameter or 96mm X 4mm flat cable and steel earth wires It has all the functions of Large Caliber Leakage Clamp Meter and Micro Power Clamp Meter Besides it also has this functions such as distinguish transformer wiring group inductive and capacitive circuits test second circuit and bus differential protection systems read the phase relationship between CTs of the differential protection check the meter wiring right repair lines and equipment etc Provide operators with a safe accurate and convenient tester ETCR7300 Series Large Caliber Three Phase Power Tester s clamp core is made of special alloy adopt the latest magnetic shielding techniques can almost shield the influence from external magnetic field to ensure the high precision high stability and high reliability of perennial uninterrupted measurement The meter can store 200 sets of data with
21. omputer with USB RS232 communication line attached in package Start up the meter run software choose history access then read save report print history data etc The more data storage take the longer time to read it Historical data can be saved in Txt text or Excel format Please don t connect the tester with computer via RS232 when the tester is under the state of voltage measurement in case result in leakage current to damage the tester 8 Delete Data At the date inquiry mode press CLR key to access deleting data menu then press lt 7 D keys to move the cursor to YES or NO item Press MENU key to confirm deletion or return to the test mode 9 Measurement Instruction 1 Single phase AC voltage U1 U2 U3 measurement L U 1 E 80 0 1 0 00 lmao TN Sac N 2 PF1 0 000 0000 11 Table 1 Measurement Key Input Input Quantity U1 Yellow COM Black Voltage of the first Q1key interface pen interface pen phase U2 Green COM Black Voltage of the second p2 key interface pen interface pen phase U3 COM Black Voltage of the third g2 interface Hed pan interface pen phase a Press key to switch the mode to voltage current power factor measurement state Show as the above LCD display b Connect wires according to Table 1
22. ue measurement of active power apparent power voltage current min indicating the minimum value measurement of active power apparent power voltage current In the normal measurement state this symbol doesn t display VI Method of Operation 1 Switch On Off Press POWER key to switch on LCD display in test mode press POWER key to switch off The meter will automatically power off after booting 15 minutes later The tester won t power off automatically in power energy measurement mode If LCD display is darker maybe the battery voltage is too low please replace batteries 2 Choose measurement mode Press MODE key to switch 7 kinds of different mode active power reactive power apparent power voltage current power factor power energy phase angle between voltage and current phase angle between three phase voltage frequency phase sequence In the mode of active power reactive power apparent power and voltage current power factor press 1 p2 p3 key to switch and display the corresponding power and voltage 3 Max and Min measurement In the mode of active power reactive power apparent power measurement and voltage current power factor measurement long press A key or V key for 3 seconds when max or min displayed at the right bottom of the LCD it is to measure the maximum or minimum value and then press Aj key or key for 3 seconds to exit the measurement mode of max and min return to normal measurem
23. y power energy phase sequence Power 6V DC LR6x4 alkaline dry batteries continuously working for 12 hours Test Mode Clamp CT integral mode Cla mp Size 80mmx80mm can clamp electric cable of 80mm diameter or 96mm 4mm flat cable and steel earth EN wires Measured Wire Position Measured wire at approximately the geometric center of the clamp Data Storage 200 sets FULL symbol indicate the memory is full RS232 Interface With RS232 interface download data to computer for analysis and management Communication RS232 communication wire 1 8m Wire Frequency 50Hz 60Hz automatic identification Gear Shift Automatic shift Sample Rate About 2 times second Line Voltage Below AC 600V line measurement Display Mode LCD 128dotsx64dots Display area 43mmx29mm Meter Size Length 275mm x Width 145mm x Height 40mm Backlight Controlled by 1 Data Hold HOLD symbol appears Overflow OL symbol appears Automatic Automatically shutdown about 15 minutes after power Shutdown on to reduce battery consumption V Low battery symbol h appears to remind the oltage Detection replacement of battery when the battery voltage drops below 5 2V Weight 1kg with batteries and accessories Working 50mA with enabled backlight 25mA with disabled Current backlight Working Temperature 10 C 40 C 80 rh and Hu
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