Brymen BM857 User Manual
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Brymen BM857 User Manual

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USER'S
MANUAL
BM857
BM859CF

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Summary of Contents for Brymen BM857

  • Page 1 USER'S MANUAL BM857 BM859CF...
  • Page 2 IEC61010-1 2nd Edition (2001) to CAT III 1000V & CAT IV 600V. The meter also meets UL3111-1(1994)* and CSA C22.2 No. 1010-1-92* to CAT III 1000V. BM857 Terminals (to COM) ratings: Category III 1000 Volts AC & DC, and Category IV* 600 Volts AC & DC.

  • Page 3: Terms In This Manual

    TERMS IN THIS MANUAL WARNING identifies conditions and actions that could result in serious injury or even death to the user. CAUTION identifies conditions and actions that could cause damage or malfunction in the instrument. WARNING To reduce the risk of fire or electric shock, do not expose this product to rain or moisture.

  • Page 4: International Electrical Symbols

    INTERNATIONAL ELECTRICAL SYMBOLS Caution ! Refer to the explanation in this Manual Caution ! Risk of electric shock Earth (Ground) Double Insulation or Reinforced insulation Fuse AC--Alternating Current DC--Direct Current 2) CENELEC Directives The instruments conform to CENELEC Low-voltage directive 73/23/EEC and Electromagnetic compatibility directive 89/336/EEC...

  • Page 5: Product Description

    3) PRODUCT DESCRIPTION Panel Illustration 1) 5-4/5 digits 500000 counts LCD display 2) Push-buttons for special functions & features 3) Selector to turn the Power On or Off and Select a function 4) Input Jack for 10A (+) (20A for 30sec) current, and for T2 (-) function 5) Input Jack (+) for...
  • Page 6 Average sensing RMS calibrated RMS (Root-Mean-Square) is the term used to describe the effective or equivalent DC value of an AC signal. Most digital multimeters use average sensing RMS calibrated technique to measure RMS values of AC signals. This technique is to obtain the average value by rectifying and filtering the AC signal.

  • Page 7: Operation

    NMRR (Normal Mode Rejection Ratio) NMRR is the DMM's ability to reject unwanted AC noise effect that can cause inaccurate DC measurements. NMRR is typically specified in terms of dB (decibel). This series has a NMRR specification of > 60dB at 50 and 60Hz, which is a good and definite ability to reject the effect of AC noise when making DC measurements.
  • Page 8 Note: Line Level Frequency measuring function input sensitivity varies automatically with voltage (or current) function range selected. The lower the measuring range the higher the sensitivity. That is, mV function has the highest and the 1000V range has the lowest as in voltage function ranges. It is recommended to first measure the signal voltage (or current) level then activate the Hz function in that voltage (or current) range to automatically get the most appropriate trigger level.
  • Page 9 Hz Logic Level Frequency and % Duty Cycle functions Press SELECT button momentarily to toggle between Hz and % (duty cycle) readings. The new setting will be saved automatically to the non-volatile memory as power up default. Press 500000 button momentarily to toggle between 5 full digits and 6 full digits Hz readings.
  • Page 10 T1-T2 Dual Channels Temperature function (BM859CF only) Press SELECT button momentarily to toggle between °C and °F readings, and the new setting will be saved automatically in the non-volatile memory as power up default. Press T1-T2 (RANGE) button momentarily to select T1, T2, or T1-T2 readings. Note: Insert the banana plug K-type temperature bead probe Bkp60 (standard accessory x 1) with correct polarities.
  • Page 11 Ω Resistance, Continuity functions Press SELECT button momentarily to toggle between Ω and Continuity functions. The new setting will be saved automatically to the non-volatile memory as power up default. Continuity function is convenient for checking wiring connections and operation of switches.
  • Page 12 Capacitance, Diode test function Press SELECT button momentarily to toggle between Capacitance and Diode test functions. The new setting will be saved automatically to the non-volatile memory as power up default. CAUTION Discharge capacitors before making any measurement. Large value capacitors should be discharged through an appropriate resistance load.
  • Page 13 µA, mA, A, and %4-20mA Current functions Insert the red test lead into the correct µA/mA or A input jack. Press SELECT button momentarily to select DC, AC, or DC+AC. The new settings will be saved automatically to the non-volatile memory as power up default. In DC mA function, neither in AC nor in DC+AC, press and hold the %4-20mA ( Hz) button for 1 second or more to display the current digital data in terms of loop current percentage (%) value.
  • Page 14 MAX/MIN RECORDING mode Press REC button momentarily to activate MAX/MIN recording mode. The LCD annunciators “R” and “MAX MIN” turn on. The meter beeps when new maximum or minimum reading is updated. Press the button momentarily to read throughout the Maximum (MAX), Minimum (MIN), and Maximum minus Minimum (MAX-MIN) readings.
  • Page 15 Hold The hold function freezes the display for later view. Press the HOLD button momentarily to activate or to exit the hold function. Set Beeper Off Press the Hz button while turning the meter on to disable the push button operating beeper feature.

  • Page 16: Maintenance

    5) MAINTENANCE WARNING To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input jacks and turn OFF the meter before opening the case. Do not operate with open case. Install only the same type of fuse or equivalent Trouble Shooting If the instrument fails to operate, check battery, fuses, leads, etc., and replace as necessary.
  • Page 17 Battery and Fuse replacement Battery use: 9V alkaline battery NEDA1604A, JIS6AM6 or IEC6LF22 BM857: Fuse (FS1) for µAmA current input: 0.63A/500V, IR 200kA, F fuse; Fuse (FS2) for A current input: 12.5A/500V, IR 20kA, F fuse BM859CF: Fuse (FS1) for µAmA current input: 1A/600V, IR 100kA, F fuse Fuse (FS2) for A current input: 15A/1kV, IR 10kA (or 11A/1kV, IR 20kA), F fuse *The 0.44A fuse is also recommended since it has a Time-Current Characteristic...

  • Page 18: Limited Warranty

    BRYMEN TECHNOLOGY CORPORATION. BRYMEN assumes no risk for damage in transit. BRYMEN will, at its option, repair or replace the defective product free of charge. However, if BRYMEN determines that the failure was caused by misused, altered, neglected, or damaged by accident or abnormal conditions of operation or handling, you will be billed for the repair.

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