OPERATING INSTRUCTIONS MODEL 2705B DIGITAL MULTIMETER
Contents
1. CAT Ill Is for measurements performed in the building installation EMC Conforms to EN61326 The symbols used on this instrument are A Caution refer to accompanying documents Equipment protected throughout by Double insulation Class I Alternating current Direct current Ground2. and the reading of measurement will be maintained in the display Cancellation of Auto Power Off Feature Press and hold the RANGE button while rotating function switch from off to any position to turn the meter on The auto power off feature is disabled Note APO annunciator is missing from the LCD MAINTENANCE WARNING Remove test leads before changing battery or fuse or performing any servicing Battery Replacement Power is supplied by a 9 volt battery NEDA 1604 IEC 6F22 The appears on the LCD display when replacement is needed To replace the battery remove the three screws from the back of the meter and lift off the front case Remove the battery from case bottom Fuse Replacement If no current measurements are possible Check for a blown overload protection fuse For access to fuses remove the three screws from the back of the meter and lift off the front case Replace F1 only with the original type 0 5A 500V fast acting ceramic fuse 6 35x32mm Replace F2 only with the original type 10A 600V fast acting ceramic fuse 6 35x25 4mm Cleaning Wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents Dirt or moisture in the terminals can affect readings CE Safety Conforms to IEC61010 1 EN61010 1 CATII 1000V CATIII 600V Class Il Pollution degree 2 Indoor use CATII Is for measurements performed on circuits directly connected to the low voltage installation
3. LCD with a maximum reading of 3999 Polarity Automatic positive implied negative polarity indication Overrange OL or OL is displayed Zero Automatic Low battery indication The E 1 is displayed when the battery voltage drops below the operating level Measurement rate 2 times per second nominal Auto power off Approx 10 minutes Operating environment 0 C to 50 C at lt 70 relative humidity Storage temperature 20 C to 60 C 0 to 80 relative humidity Accuracy Stated accuracy at 23 C 5 C lt 75 relative humidity Temperature Coefficient 0 1 x specified accuracy per C C to 18 C 28 C to 50 C Altitude 6561 7 feet 2000m Power Single standard 9 volt battery NEDA 1604 JIS 006P IEC 6F22 Battery life 200 hours typical with carbon zinc Dimensions 165mm H x78mm W x42 5mm D Weight Approx 10 0 02 285g including holster Accessories One set test leads one spare fuse 9V battery installed and Operating Instructions DC VOLTS Ranges 400mV 4V 40V 400V 1000V Resolution 0 1mV Accuracy 1 0 rdg 2dgts Input impedance 400mV gt 100MO 4V 10MOQ 40V 1000V 9 1MQ Overload protection 1000VDC or 750VAC rms AC VOLTS 50Hz 500Hz Ranges 400mV 4V 40V 400V 750V Resolution 0 1mV Accuracy 2 0 rdg 5 dgts 50 100Hz on 400mV range 2 0 rdg 5 dgts Input impedance 400mV gt 100MQ 4V 10MQ 40V 750V 9 1MQ Overload protection 1000VDC or 750
4. OPERATING INSTRUCTIONS MODEL 2705B DIGITAL MULTIMETER APO HOLD RANGE em AC O Ai MKQ BOO SAFETY INFORMATION The following safety information must be observed to ensure maximum personal safety during the operation at this meter Use the meter only as specified in this manual or the protection provided by the meter might be impaired Test the meter on a known voltage before using it to determine if hazardous voltage is present Do not use the meter if the meter or test leads look damaged or if you suspect that the meter is not operating properly Never ground yourself when taking electrical measurements Do not touch exposed metal pipes outlets fixtures etc which might be at ground potential Keep your body isolated from ground by using dry clothing rubber shoes rubber mats or any approved insulating material Turn off power to the circuit under test before cutting unsoldering or breaking the circuit Small amounts of current can be dangerous Use caution when working above 60V dc or 30V ac rms Such voltages pose a shock hazard When using the probes keep your fingers behind the finger guards on the probes Measuring voltage which exceeds the limits of the multimeter may damage the meter and expose the operator to a shock hazard Always recognize the meter voltage limits as stated on the front of the meter SPECIFICATIONS Display 3 digit liquid crystal display
5. VAC rms CURRENT Ranges 400uA 4000uA 40mA 400mA 10A Resolution 0 1uA DC accuracy t 2 0 rdg 2 dgts on 400uA to 400mA ranges t 3 0 rdg 3 dgts on 10A range AC accuracy 50Hz 500Hz 2 5 rdg 5 dgts on 400uA to 400mA ranges 3 5 rdg 5 dgts on 10A range Voltage burden 0 2V on 400uA 40mA 10A ranges 2V on 4000uUA 400mA ranges Input protection 0 5A 500V fast blow ceramic fuse 10A 600V fast blow ceramic fuse 10A Input 10A for 60 seconds maximum followed by a 10 minute cooling period RESISTANCE Ranges 4000 4kQ 40kQ 400kQ 4MQ 40MQ Resolution 0 10 Accuracy 1 5 rdg 4 dgts on 400Qto 400kQ ranges 2 5 rdg 4 dgt on 4MQ range 5 0 rdg 5 dgt on 40MO range Open circuit volts 0 45Vdc 1 2Vdc on 4000 range Overload protection 500VDC or AC rms DIODE TEST Test current 1 0mA approximate Accuracy 3 0 rdg 3 dgts Resolution 10mV Audible indication lt 0 25V Open circuit volts 3 0Vdc typical Overload protection 500VDC or AC rms CONTINUITY Audible indication Less than 250 Response time 500ms Overload protection 500VDC or AC rms OPERATION Before taking any measurements read the Safety Information Section Always examine the instrument for damage contamination excessive dirt grease etc and defects Examine the test leads for cracked or frayed insulation If any abnormal conditions exist do not attempt to make any measurements Input Warning Beeper The met
6. er has a beeper that warns the user when the test lead is in the current jack while the meter is switched to make a voltage measurement Another safety feature to protect the meter and you Data Hold Feature Press HOLD button to lock the reading on display and release it by pressing the button again Manually Selecting Range The meter also has a manual range mode In manual range you select and lock the meter in a range To manually select a range Press RANGE button to hold the selected range Subsequently pressing the RANGE button will select each range in sequence from the lowest to highest range Hold the button for 2 seconds to return to the Autorange Mode Voltage Measurements 1 Connect the red test lead to VQ jack and the black test lead to the COM jack 2 Set the Function Range switch to the desired voltage type AC or DC and range If magnitude of voltage is not known set switch to the highest range and reduce until a satisfactory reading is obtained 3 Connect the test leads to the device or circuit being measured 4 For dc a sign is displayed for negative polarity positive polarity is implied Current Measurements 1 Connect the red test lead to the uA mA or 10A jack and the black test lead to the COM jack 2 Set the Function Range switch to the DC or AC ranges 3 Remove power from the circuit under test and open the normal circuit path where the measurement is to be taken Connect the meter i
7. n series with the circuit 4 Apply power and read the value from the display Resistance Measurements 1 Set the Function Range switch to the desired resistance range 2 Reove power from the equipment under test 3 Connect the red test lead to the VO jack and the black test lead to the COM jack 4 Connect the test leads to the points of measurements and read the value from the display Diode Tests 1 Connect the red test lead to the VQ jack and the black test lead to the COM jack 2 Set the Function Range switch to the position 3 Turn off power to the circuit under test External voltage across the components causes invalid readings 4 Touch probes to the diode A forward voltage drop is about 0 6V typical for a silicon diode 5 Reverse probes If the diode is good OL is displayed If the diode is shorted 000 or another number is displayed 6 If the diode is open OL is displayed in both directions 7 Audible Indication Less than 0 25V Continuity Measurements 1 Set the Function switch to the si position 2 Turn off power to the circuit under test External Voltage across the components causes invalid reading 3 Connect the test leads to the two points at which continuity is to be tested The buzzer will sound if the resistance is less than approximately 250 Auto Power Off 1 Auto power off approx 10 minutes 2 After auto power off press any button to restart the meter
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