Brymen BM789, BM785 User guide

USER'S
MANUAL

BM789
BM785

Digital
Multimeter

1

1) SAFETY

This manual contains information and warnings that must be followed for operating the
meter safely and maintaining the meter in a safe operating condition. If the meter is
used in a manner not specified by the manufacturer, the protection provided by the
meter may be impaired.

Observe proper safety precautions when working with voltages above 30 Vrms, 42.4
Vpeak or 60 VDC. These voltage levels pose a potential shock hazard to the user. Do
not expose this product to rain or moisture. The meter is intended only for indoor use.

Keep your hands/fingers behind the hand/finger barriers (of the meter and the test
probe assembly, where applicable) that indicate the limits of safe access of the hand­held parts during measurements. Inspect lead wires, connectors, and probes for
damaged insulation or exposed metal periodically. If any defects are found, replace
them immediately. Only use the test probe assembly provided with the meter or a UL
Listed test probe assembly to the same meter ratings or better.

Optional offer premium test probe assembly using silicone lead wire insulation, at
agent’s discretion, is equipped with white inner insulation layers as wear indicators.
Replace them

immediately if any of the white layers has become visible.

Disconnect the test leads from the test points before changing functions.

The meter meets IEC/EN/BSEN/CSA_C22.2_No./UL standards of 61010-1 Ed. 3.0,
61010-2-030 Ed. 1.0, 61010-2-033 Ed. 1.0 to Measurement Categories CAT III 1000V
and CAT IV 600V ac & dc.

The accompanied test probe assembly meets IEC/EN/BSEN/CSA_C22.2_No./UL
standards of 61010-031 Ed. 2.0 to the same meter ratings or better. The 61010-031
requires exposed conductive test probe tips to be ≤ 4mm for CAT III & CAT IV ratings.
Refer to the category markings on your probe assemblies as well as on the add-on
accessories (like detachable Caps or Alligator Clips), if any, for applicable rating
changes.

INTERNATIONAL SYMBOLS

Marking of Electrical and Electronic Equipment (EEE). Do not dispose of this

product as unsorted municipal waste. Contact a qualified recycler
Refer to the explanation in this Manual
Possibility of electric shock

Earth (Ground)
Meter protected throughout by Double Insulation or Reinforced insulation

Fuse
Direct Current (DC)
Alternating Current (AC)

Three-phase Alternating Current

3

Application around and removal from hazardous live conductors is permitted

BRIEF INFORMATION ON MEASUREMENT CATEGORIES

2

Measurement Category IV is applicable to test and measuring circuits connected at
the source of the building’s low-voltage MAINS installation. Examples are
measurements on devices installed before the main fuse or circuit breaker in the
building installation.
Measurement Category III is applicable to test and measuring circuits connected to
the distribution part of the building’s low-voltage MAINS installation. Examples are
measurements on distribution boards (including secondary meters), circuit-breakers,
cables, bus-bars, junction boxes, switches, socket-outlets, stationary motors in the fixed
installation, and equipment for industrial use.
Measurement Category II is applicable to test and measuring circuits connected
directly to utilization points (socket outlets and similar points) of the low-voltage MAINS
installation. Examples are measurements on MAINS CIRCUITS of household
appliances, portable tools and similar equipment.

2) EUROPEAN DIRECTIVES AND UK STATUTORY REQUIREMENTS

The instruments conform to EUROPEAN (CE) Low-Voltage Directive 2014/35/EU,
Electromagnetic Compatibility Directive 2014/30/EU, and RoHS 2 Directive 2011/65/EU
plus amendment Directive (EU) 2015/863. The instruments also conform to the UK
(UKCA) Electrical Equipment (Safety) Regulations 2016, Electromagnetic Compatibility
Regulations 2016, and The Restriction of the Use of Certain Hazardous Substances in
Electrical and Electronic Equipment Regulations 2012.

3) PRODUCT DESCRIPTION

This user's manual uses only representative model(s) for illustrations. Please refer
detailed specifications for function availability to each model.

1) 4-5/6 digits 60000 counts
display

2) Push-buttons for special
functions & features

3

3) Selector to turn the Power On
or Off and Select a function

4) Positive Input Jack for T2 and
mA/µA functions

5) Positive Input Jack for all
functions EXCEPT T2, A and
µA/mA

6) Common/ Negative (Ground
reference) Input Jack for all

function while Negative for T2



Analog bar-graph

functions EXCEPT T2

7) Positive Input Jack for A

4

The analog bar graph provides a visual indication of measurement like a traditional
analog meter needle. It is excellent in detecting faulty contacts, identifying
potentiometer clicks, and indicating signal spikes during adjustments.

5

4) OPERATION

Note: Before and after hazardous voltage measurements, test the voltage function on a
known source such as line voltage to determine proper meter functioning.

AutoV (LoZ) (Model 789 only)

Inputs are made via the test lead terminals V-COM. AutoV automatically selects
measurement function of DCV or ACV based on their input levels via the test leads.
The input also provides a low ramp-up impedance (LoZ) to drain ghost voltages.

◎

With no input, the meter displays “Auto” when it is ready.

◎

When a signal above the voltage threshold of 1V DC or AC up to the rated 1000V is

present, the meter displays the voltage value in appropriate DC or AC, whichever larger
in peak magnitude.

◎

Push-button features of only HOLD, AutoHold, EF and Backlight are available in

AutoV mode.

Note:

1) Ghost-voltage Buster: Ghost-voltages are unwanted stray signals coupled from

6

adjacent hard signals, which confuse common multimeter voltage measurements. The
AutoV mode provides low (ramp-up) input impedance (approx. 2.1kΩ at low voltage) to
drain ghost voltages leaving mainly hard signal values on meter readings. It is an
invaluable feature for precise indication of hard signals, such as distinguishing between
hot and open wires (to ground) in electrical installation applications.

2) AutoV Mode input impedance increases abruptly from initial 2.1kΩ to a few hundred
kΩ’s on high voltage hard signals. “LoZ” displays on the LCD to remind the users of
being in such a low impedance mode. Peak initial load current, while probing 1000VAC
for example, can be up to 673mA (1000V x 1.414 / 2.1kΩ), decreasing abruptly to
approx. 2.1mA (1000V x 1.414 / 670kΩ) within a fraction of a second. Do not use
AutoV mode on circuits that could be damaged by such low input impedance. Instead,
use rotary selector

or high input impedance voltage modes to minimize the test

loadings for such circuits.

ACV; VFD-ACV; dBm (Model 789 only)

Inputs are made via the test lead terminals V-COM. Press the SELECT button
momentarily to select the subject functions in sequence. Last selection will be saved as
power up default for repeat measurement convenience.

Note: In dBm function, power up default reference impedance will be displayed for 1



second before displaying the dBm readings. Press dBm-

(RANGE) button

momentary to select different reference impedance of 4, 8, 16, 32, 50, 75, 93, 110, 125,

7

135, 150, 200, 250, 300, 500, 600, 800, 900, 1000, up to 1200. Last selection will be
saved as power up default for repeat measurement convenience.

~Hz Line Frequency

Press the ~Hz button momentarily to switch to Line Frequency function. It is only
available to the functions as in the table below. Input sensitivity varies automatically
with the function range selected while the ~Hz function is being activated. Level 0 is the
highest sensitivity while LEVEL 3 is the lowest. Press momentarily the ~Hz (LEVEL)
button can manually select the available Trigger Levels (see table below) in sequence.
Press the ~Hz button for one-second-or-more to leave Line Frequency function.

TRIGGER

ACV/dBm/DCV/AC+DCV VFD-ACV

A

LEVEL 0 6V 600A
LEVEL 1 60V 6000A

mA A

60mA 6A

600mA 10A
LEVEL 2 600V 600V
LEVEL 3 1000V 1000V

Note: It is recommended to direct measure the signals (voltage or current) in auto­ranging mode before activating the ~Hz function right in that range to get the most
appropriate trigger level automatically. If the ~Hz reading is unstable, select lower
sensitivity to avoid possible electrical noises. If the reading shows zero, select higher

sensitivity to measure.

8

9

DCV; DC+ACV

Inputs are made via the test lead terminals V-COM. Press the SELECT button
momentarily to select the subject functions in sequence. Last selection will be saved as
power up default for repeat measurement convenience.

DCmV; ACmV; DC+ACmV; Logic-level Hz; Logic-level Duty %; dBm (Model 789
only)

Inputs are made via the test lead terminals V-COM. Press the SELECT button
momentarily to select the subject functions in sequence. Last selection will be saved as
power up default for repeat measurement convenience.

10

Note: In dBm function, power up default reference impedance will be displayed for 1
second before displaying the dBm readings. Press dBm-



(RANGE) button

momentary to select different reference impedance of 4, 8, 16, 32, 50, 75, 93, 110, 125,



135, 150, 200, 250, 300, 500, 600, 800, 900, 1000, up to 1200

. Last selection will be

saved as power up default for repeat measurement convenience.

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 Resistance; BeepLitTM Continuity; nS Conductance (Model 789 only)

Inputs are made via the test lead terminals V-COM. Press the SELECT button
momentarily to select the subject functions in sequence. Last selection will be saved as
power up default for repeat measurement convenience.

◎

BeepLitTM Continuity

This function is having improved convenience for checking wiring connections and
operation of switches. Resistance threshold is being used. A continuous beep tone
together with display backlight flashing indicate a complete wire. Such audible and
visible indications improve continuity readabilities in noisy working environments.

◎

nS Conductance (Model 789 only)



nS Conductance is the inverse of Resistance. That is, S=1/

or nS=1/G. It virtually
extends the Resistance measurements to the order of Giga-Ohms for leakage
measurements.

Note: Using Resistance, BeepLit

TM

Continuity or nS Conductance function in a live

circuit will produce false results and may damage the meter. In many cases, the
suspected component(s) must be disconnected from the circuit to obtain an accurate
measurement reading.

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Capacitance; BeepLitTM Diode

Inputs are made via the test lead terminals V-COM. Press the SELECT button
momentarily to select the subject functions in sequence. Last selection will be saved as
power up default for repeat measurement convenience.

◎

BeepLitTM Diode

●Reading indication: Forward voltage drop (forward biased) for a good silicon diode is
between 0.400V to 0.900V. A higher reading indicates a leaky diode (defective). A zero
reading indicates a shorted diode (defective). An over-range display indicates an open
diode (defective). Reverse the test leads connections (reverse biased) across the diode.
The digital display shows over-range if the diode is good. Any other readings indicate
the diode is resistive or shorted (defective).

●Beep-Alert & BeepLit

TM

indication: When the display reading drops across 0.850V,

the meter alerts a short beep to signal a reasonable forward voltage drop of common
diodes. However, if the reading further drops below 0.100V, the meter gives a
continuous beep tone together with flashing display backlight to indicate a shorted diode

TM

or a complete wire. It is similar to that of BeepLit

Continuity function but BeepLitTM

Diode, instead, is based on voltage threshold to indicate a complete wire.

Note:

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1) Discharge capacitor(s) before making capacitance measurements. Large value
capacitors should be discharged through an appropriate resistance load.

TM

2) Using BeepLit

Diode or Capacitance function in a live circuit will produce false
results and may damage the meter. In many cases, the suspected component(s) must
be disconnected from the circuit to obtain an accurate measurement reading.

Temperature T1 & T2 (Model 789 only)

T1 inputs are made via the input terminals V-COM. Press SELECT button momentarily
can toggle between °C (Celsius) and °F (Fahrenheit) readings when enabled. Last
selection will be saved as power up default for repeat measurement convenience.
Additional T2 inputs are made via the input terminals

- . Press RANGE (T1-

T2) button momentarily to select T1, T2 and T1-T2 in sequence.

◎

Enabling °F and/or °C readings

1) Enabling both °F and °C readings: Press-and-hold EF button to power on the
meter. The meter displays “C-F” to acknowledge both °F and °C readings are enabled.

2) Enabling °C readings only: Repeat step #1 when needed. Turn on the meter to
temperature function. Select readings in °C and then turn the meter off. Press-and-hold
CREST button to power on the meter again. The meter displays “C” to acknowledge °C
readings only is enabled.

3) Enabling °F readings only: Repeat step #1 when needed. Turn on the meter to
temperature function. Select readings in °F and then turn the meter off. Press-and-hold
CREST button to power on the meter again. The meter displays “F” to acknowledge °F
readings only is enabled.

Note:

1) Temperature accuracies assume meter interior has the same temperature
(isothermal stage) of the ambient for a correct junction voltage compensation. Allow the
meter and the type-K probe set to reach isothermal stage for a significant change of
ambient temperature. It can take up to an hour for changes > 5°C.

2) Beware +/- polarities of the banana-plug when using the type-K temperature bead­probe Bkp60.

3) Banana-pins to type-K socket adapter Bkb32 (Optional purchase) can be used to
adapt other type-K probes with standard miniature plugs. However, the adapter

14

becomes part of the measurement isothermal block when in use, and should be
included in the overall isothermal considerations to minimize erratic readings.

A Current

15

Inputs are made via the input terminals

-COM. Press the SELECT button
momentarily to select DC, AC, DC+AC in sequence. Last selection will be saved as
power up default for repeat measurement convenience of all current functions.

µA Current

Inputs are made via the input terminals

-COM. Press the SELECT button
momentarily to select DC, AC, DC+AC in sequence. Last selection will be saved as
power up default for repeat measurement convenience of all current functions.

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mA Current

Inputs are made via the input terminals

-COM. Press the SELECT button
momentarily to select DC, AC, DC+AC and %4-20mA (Model 789 only) in sequence.
Last selection will be saved as power up default for repeat measurement convenience
of all current functions.

EF-Detection of Electric Field

Press EF button momentarily to enter EF-Detection function. Defaults at high

17

sensitivity EF-H. The meter displays “EF-H” when it is ready. If it is too sensitive for your
applications, press EF button momentarily to select lower sensitivity “EF-L”. The
detected Electric Field strength is indicated as a series of bar-graph segments on the
display plus variable beep tones. Press EF button for one-second-or-more to exit EF-
Detection function.

◎

Non-Contact EF-Detection (NCV): An antenna is located along the top-right corner

which detects the electric field surrounding energized conductors. It is ideal for tracing
live wiring connections, locating wiring breakages and to distinguish between live and
earth connections.

◎

Probe-Contact EF-Detection (Single-pole): For more precise indication of live

wires, such as distinguishing between Live and Ground connections, use one single
test-probe to test via terminal COM for direct metal contact probing to achieve the most
distinctive indications.

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LCD Backlight

Press the SELECT button for one-second-or-more to toggle the LCD backlight. The
LCD backlight goes off automatically after idling for approximately 16 minutes to extend
battery life.

Manual or Auto-ranging

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For most auto-ranging functions (LCD “

” turns on by default), press the RANGE
button momentarily to override and select manual-ranging. The meter will remain in the
range it was in, the LCD “

” turns off. Press the button momentarily again to select

the next range. Press RANGE button for one-second-or-more to resume auto-ranging.

Note: Manual-ranging feature is not available to the Auto-V, dBm, Capacitance & Hz
functions.

HOLD
HOLD feature freezes the display for later view. LCD “

” turns on. Press the HOLD

button momentarily to toggle the HOLD feature.

AutoHold Real-Read™
AutoHold feature displays the last latched stable-reading for later view when the test

leads are removed from the test points after a significant-measurement session. Real­Read™ is to show real-time readings during the significant-measurement session to
avoid “blind” measurements. Press the AutoHold
to toggle the AutoHold feature on. LCD “

” turns on. Availability: Resistance,

button for one-second-or-more

Continuity, LoZ AutoV, VFD Volts, Voltage and Current functions.

◎

Significant-measurements (readings) are >5% of range in Voltage and Current

functions, or non-OL in Resistance function.

◎

Stable-reading is a significant-measurement reading having ≤ 30 counts in

difference with its two immediate preceding measurement readings.

◎

Significant-measurement readings are being displayed in real time (Real-Read™); “-

- - - -” is being displayed while awaiting significant-measurements.

◎

The AutoHold gives a short-beep with a flashing “

” when a stable-reading is

successfully latched ready for later display. If any of the further significant-measurement
readings differs from the latched reading by >30 counts, the latched-reading will be
reset waiting to re-latch a new stable-reading.

◎

After a significant-measurement session, AutoHold gives a short-beep and displays

the latched-reading. The reading flashes to emphasize it is on hold to avoid confusions.

◎

The AutoHold gives 3 short-beeps and “- - - - -” flashes to indicate a null capture

after a significant-measurement. It represents no stable-reading is being latched or that
has been reset after further encountering unstable signal changes to avoid displaying

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misleading readings.

Note: Make sure both test probes are making good contacts simultaneously when
using the AutoHold feature. Single probe contact may lead to latching floating-signal
readings. Removing both probes from the test points simultaneously largely avoids the
mis-latching of an unwanted floating-signal.

MAX/MIN/AVG Record mode

Press REC

button momentarily to activate MAX/MIN/AVG recording mode. LCD “
MAX AVG MIN” turn on. The meter beeps when new MAX (maximum) or MIN
(minimum) reading is updated. Press the button momentarily to read the MAX, MIN,
AVG and MAXAVGMIN (active measurement) readings in sequence. Press REC
button for one-second-or-more to exit this mode. Auto-Power-Off is disabled
automatically in this mode.

Relative
Relative

the displaying reading as the reference value. LCD “
momentarily to toggle Relative

mode

mode allows the user to offset the meter consecutive measurements with

” turns on. Press the button

mode.

CREST mode

Press CREST button momentarily to activate CREST mode (Instantaneous PEAK­HOLD) to capture current or voltage peak values in duration as short as 0.25ms. LCD

& MAX turn on. The meter beeps when new MAX (maximum) or MIN (minimum)

reading is updated. Press the button momentarily to toggle the

MAX and MIN
readings. Press the button for one-second-or-more to exit this mode. Auto-Power-Off is
disabled automatically in this mode. Availability: Voltage and Current functions.

Beep-Jack™ Input Warning

The meter beeps as well as displays “InEr” to warn the user against possible damage
to the meter due to improper connections to the A, mA, or A input jacks when another
function, especially a voltage function, is selected.

Auto-Power-Off (APO)

The Auto-Power-off (APO) mode turns the meter off automatically to extend battery life
after approximately 30 minutes of no rotary switch or push button operations. To wake

21

up the meter from APO, press the SELECT button momentarily and release, or turn the
rotary switch OFF and then back on. Always turn the rotary switch to the OFF position
when the meter is not in use

Power-on Options

◎

Disabling APO

Press-and-hold the SELECT button while powering on the meter can disable APO
feature temporarily during the power-on session. The LCD will display “dSAPO” to
confirm selection before the SELECT button is released.

◎

Disabling beep tone

Press-and-hold the RANGE button while powering on the meter can toggle the beep
tone OFF or ON in sequence. The meter confirms selection by displaying “dSbEP” for
beeper OFF (disabled) or “EnbEP” for beeper ON (enabled), before the RANGE button
is released. Last selection will be saved as power up default. When disabled, most

TM

operation beep tones are turned off except those for BeepLit

Continuity and BeepLitTM

Diode functions.

◎

Shortening APO idling time for inspection

Press-and-hold the

(Relative) button while powering on the meter can shorten the

APO idling time to approximately 8 seconds temporarily during the power-on session. It

is designed mainly for production inspection.

◎

Disabling/Enabling oC or oF function availability

See Temperature measurement operation description for details.

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5) MAINTENANCE

Note: 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.

Trouble Shooting

If the instrument fails to operate, check batteries and test leads etc., and replace as
necessary. Double check operating procedure as described in this user’s manual. Refer
to the LIMITED WARRANTY section for obtaining calibration, repairing or warranty
service.

Accuracy and Calibration

Accuracy is specified for a period of one year after calibration. Periodic calibration at
intervals of one year is recommended to maintain meter accuracy.

Cleaning and Storage

Periodically wipe the meter and the test probe assembly with a damp cloth and mild
detergent. Do not use abrasives or solvents. Allow to dry completely before operating. If
the meter is not to be used for periods of longer than 60 days, remove the batteries and
store them separately.

Battery use and replacement

The meter uses standard 1.5V AAA Size (IEC R03) battery X 3
Loosen the 2 captive screws on the battery compartment of the bottom housing. Lift the
battery compartment cartridge. Replace with new batteries. Replace the battery
compartment cartridge. Re-fasten the screws.

Fuse use and replacement

The Meter uses:

Fuse (F1) for A input:

Bussmann DMM-11AR;
mm

Fuse (F2) for µA/mA input:

SIBA 7017240; 0.4A/1000Vac & Vdc, IR 30kA, F fuse; Dimension: 6 x 32 mm

11A/1000Vac & Vdc, IR 20kA, F fuse; Dimension: 10 x 38

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Turn the rotary knob to OFF position. Loosen 6 captive screws (2 are under the tilt
stand) from the bottom housing. Lift the battery compartment cartridge. Further loosen 2
captive screws under the battery compartment cartridge. Lift the upper housing and
replace with new fuse(s). Replace the upper housing, and make sure the rotary knob is
pointing at the OFF position when doing so. Re-fasten the 2 captive screws under the
battery compartment cartridge. Replace the battery compartment cartridge. Re-fasten
the 6 captive screws on the bottom housing.

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General Specification
Display: 4-5/6 digits 60,000 counts.
Polarity: Automatic
Update Rate:

4-5/6 digits: Max 5 per second nominal
31 Segment Bar-graph: 50 per second max
Operating Temperature: -20C to 55C continuous operating (except on A function, see
Electrical Specifications below for more details)
Relative Humidity: Maximum relative humidity 80% for temperature up to 31C decreasing
linearly to 50% relative humidity at 55C

Pollution degree: 2
Storage Temperature: -20C to 60C, < 80% R.H. (with battery removed)
Altitude: Operating below 2000m
Temperature Coefficient: nominal 0.10 x (specified accuracy)/ C @ (-20C ~ 18C or
28C ~ 55C), or otherwise specified
Sensing: AC and AC+DC True RMS
Safety: Double insulation per IEC/UL/EN/BSEN 61010-1 Ed. 3.0, IEC/UL/EN/BSEN 61010-

2-030 Ed. 1.0, IEC/UL/EN/BSEN 61010-2-033 Ed. 1.0, IEC/UL/EN/BSEN 61010-031 Ed.

2.0 and the corresponding CAN/CSA-C22.2 regulations to Measurement Categories III
1000V AC & DC and Category IV 600V AC & DC
Overload Protections:

A & mA: 0.4A/1000V DC/AC, IR 30kA or better, F fuse
A: 11A/1000V DC/AC, IR 20kA or better, F fuse
V: 1100V DC/AC rms
mV,  & Others: 1000 V DC/AC rms

Transient protection: 8kV (1.2/50s surge)
E.M.C.: Meets EN/BSEN 61326-1:2013
Power Supply: 1.5V AAA Alkaline battery x 3
Power Consumption: 10mA typical for AC & AC+DC Voltage/Current functions; 8mA

typical for other functions

Low Battery: Below approx. 3.7V
APO Timing: Idle for 15 minutes
APO Consumption: 15A typical.
Dimension: L193mm X W89mm X H51mm
Weight: 420 gm
Accessories: Test lead pair, User's manual, Bkp60 banana plug K-type thermocouple x 1

(Model 789 only)
Optional Accessories: BKB32 banana plug to type-K socket plug adaptor (Model 789
only), BMH-02 magnetic hanger strap

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Special Features: AutoHold; VFD; BeepLitTM Continuity; Record MAX, MIN, & AVG
readings; Crest (Instantaneous Peak hold) MAX & MIN readings; Relative Zero mode; Data
Hold; Backlighted LCD display; BeepJack™ audible & visible input warning; %4-20mA loop
current readings (Model 789 only); T1-T2 differential temperature readings (Model 789
only); dBm readings (Model 789 only)

ELECTRICAL SPECIFICATIONS

Accuracy is (% reading digits + number of digits) or otherwise specified, at 23C  5C &
less than 75% relative humidity.
Maximum Crest Factor <1.6:1 at full scale & < 3.2:1 at half scale, and with frequency
components fall within the specified frequency bandwidth for non-sinusoidal waveforms.

DC Voltage

Model 789 Model 785
RANGE Accuracy

600.00mV, 6.0000V, 60.000V 0.03% + 2d 0.03% + 2d

600.00V 0.05% + 5d 0.05% + 5d

1000.0V 0.15% + 5d 0.15% + 5d

Input Impedance: 10M, 75pF nominal (280pF nominal for 600mV range)

AC Voltage

Model 789

1)

Model 785

RANGE Accuracy

50Hz ~ 60Hz

600.00mV

2)

, 6.0000V, 60.000V, 600.00V, 1000.0V 0.5% + 30d 0.5% + 30d

40Hz ~ 1kHz

600.00mV

2)

, 6.0000V, 60.000V, 600.00V, 1000.0V 0.9% + 30d 1.2%+30d

1kHz ~ 7kHz

600.00mV

2)

, 6.0000V, 60.000V, 600.00V 1.8% + 40d 2.0%+40d

1000.0V Unspec'd Unspec'd

7kHz ~ 20kHz

600.00mV

2)

, 6.0000V, 60.000V, 600.00V

4)

2.0%+60d
Unspec'd

1000.0V Unspec'd

20kHz ~ 100kHz

600.00mV

5)

2)

, 6.0000V

5)

, 60.000V

5)

4.0%+60d
Unspec'd

600.00V, 1000.0V Unspec'd

1)

Accuracy specified from 10% to 100% of range

2)

Signal peak absolute values, including DC bias, less than 1000mV

3)

Accuracy adds 1% @ >5kHz ~ 7kHz

4)

Bandwidth specified to 10kHz only for 600V range

5)

Accuracy specified from 30% to 100% of range

peak

3)

26

Input Impedance: 10M, 75pF nominal (140pF nominal for 600mV range)
Residual reading less than 50 digits with test leads shorted

AC+DC Voltage

Model 789

1)

Model 785

RANGE Accuracy

50Hz ~ 60Hz

600.00mV

2)

, 6.0000V, 60.000V, 600.00V, 1000.0V 0.7% + 40d 0.7% + 40d

0Hz, 40Hz ~ 1kHz

600.00mV

2)

, 6.0000V, 60.000V, 600.00V, 1000.0V 1.2% + 40d 1.4%+40d

1kHz ~ 7kHz

600.00mV

2)

, 6.0000V, 60.000V, 600.00V 2.0% + 50d 2.2%+50d

1000.0V Unspec'd Unspec'd

7kHz ~ 20kHz

600.00mV

2)

, 6.0000V, 60.000V, 600.00V

4)

2.5%+70d
Unspec'd

1000.0V Unspec'd

1)

Accuracy specified from 10% to 100% of range

3)

2)

Signal peak absolute values, including DC bias, less than 1000mV

3)

Accuracy adds 1% @ >5kHz ~ 7kHz

4)

Bandwidth specified to 10kHz only for 600V range

peak

Input Impedance: 10M, 75pF nominal (140pF nominal for 600mV range)
Residual reading less than 50 digits with test leads shorted.

VFD AC Voltage

RANGE Accuracy

1)

10Hz ~ 200Hz

600.00V, 1000.0V 4% + 50d
200Hz ~ 440Hz

600.00V, 1000.0V 10% + 50d

1)

Signal fundamental frequency > 440Hz is unspecified

2)

Accuracy linearly decreases from 2% + 50d @ 200Hz to 10% + 50d @ 440Hz

2)

27

LoZ Auto-DCV (Model 789 only)

RANGE Accuracy

6.0000V, 60.000V, 600.00V, 1000.0V 0.5%+30d

LoZ Auto-DCV Threshold: > +1.0VDC or < -1.0VDC nominal
LoZ Auto-DCV Input Impedance:

Initially approx. 2.1k, 140pF nominal; Impedance increases abruptly within a fraction of a
second as display voltage is above 50V (typical). Ended up impedances vs display
voltages typically are:
12k @ 100V
90k @ 300V
300k @ 600V
670k @ 1000V

LoZ Auto-ACV (Model 789 only)

RANGE Accuracy

1)

50Hz ~ 60Hz

6.0000V, 60.000V, 600.00V, 1000.0V 1.0%+40d

1)

Accuracy specified from 10% to 100% of range
LoZ Auto-ACV Threshold: > 1.0VAC (50/60Hz) nominal
LoZ Auto-ACV Input Impedance:

Initially approx. 2.1k, 140pF nominal; Impedance increases abruptly within a fraction of a
second as display voltage is above 50V (typical). Ended up impedances vs display
voltages typically are:
12k @ 100V

90k @ 300V
300k @ 600V
670k @ 1000V

28

29

dBm (Model 789 only)

Range and accuracy are subject to ACmV, ACV and reference impedance selected.
Typical 600 reference impedance ranges:

In ACmV: -42.22 dBm to -2.22 dBm

In ACV: -17.78 dBm to 62.22 dBm
Input Impedance: 10M,140pF nominal
Selectable reference impedance of 4, 8, 16, 32, 50, 75, 93, 110, 125, 135, 150, 200, 250,
300, 500, 600, 800, 900, 1000 and 1200

Ohms

RANGE Accuracy

1)

600.00

6.0000k, 60.000k

600.00k

6.0000M

60.000M

99.99nS

2)

3) 4)

3) 5)

1.0%+10d

0.085%+10d

0.085%+4d

0.15%+4d

1.5%+5d

2.0%+5d

Open Circuit Voltage: < 1.3VDC (< 1.5VDC for 600 range)

1)

Temperature Coefficient: 0.20 x (specified accuracy)/ C @ (-20C ~ 18C or 28C ~

55C)

2)

Constant Test Current: 0.1µA Typical

3)

Constant Test Current: 0.01µA Typical

4)

Specified accuracy adds 0.5% @ >50M

5)

For Model 789 only; Specified accuracy adds 30d @ <10nS

BeepLitTM Continuity Tester

Audible threshold: between 100 and 420
Response time < 100s
Audible Indication: Beep Sound
Visible Response: LCD Backlight

BeepLitTM Diode Tester

RANGE Accuracy Test Current (Typical) Open Circuit Voltage

3.0000V 1%+20d 0.35mA < 3.1 VDC

Short-Beep-Alert Threshold: Drop Across 0.850V
BeepLit™ continuous ON Threshold: < 0.100V
Audible Indication: Beep Sound
Visible Indication: LCD Backlight

Capacitance
RANGE Accuracy

1) 2)

10.00nF 1.0% + 10d

100.0nF~1000nF 1.0% + 2d

30

10.00F~1.000mF

1.8% + 4d

10.00mF 2.0% + 4d

1)

Accuracies with film capacitor or better

2)

Temperature Coefficient: 0.20 x (specified accuracy)/ C @ (-20C ~ 18C or 28C ~

55C)

DC Current
RANGE Accuracy Burden Voltage

600.00A

6000.0A

60.000mA

1) 2)

2)

0.075%+20d 2.0mV/mA

0.075%+20d

0.075%+20d

0.2mV/A

0.2mV/A

600.00mA 0.15%+20d 2.0mV/mA

6.0000A 0.3%+20d 30mV/A

10.000A

1)

Specified with Open-circuit-voltage (OCV) of Current-loop-under-test at >100V.

2)

The meter shows a few negative residue counts when the input is short-circuited, with

3)

0.3%+30d 30mV/A

OCV at zero volt. It is the nature of the internal protection circuity design, and will not affect
measurement readings at nominal OCVs greater than 100V in significant measurements.

3)

10A continuous up to ambient 40oC only, and is <3 mins on per >15 mins off @ 40oC ~

55oC; >10A to 20A for <30 seconds on per >15 mins off

AC Current
Model 789

1)

Model 785

Burden Voltage

RANGE Accuracy

40Hz ~3kHz

600.00A, 6000.0A 0.2mV/A

0.9%+20d 0.9%+20d

60.000mA, 600.00mA

6.0000A, 10.000A

1)

Accuracy unspecified @ <10% of range

2)

10A continuous up to ambient 40oC only, and is <3 mins on per >15 mins off @ 40oC ~

2)

1.0%+30d 1.0%+30d 30mV/A

2.0mV/mA

55oC; >10A to 20A for <30 seconds on per >15 mins off

AC+DC Current
Model 789

1)

Models 785

RANGE Accuracy

0Hz, 40Hz ~ 3kHz

31

Burden Voltage

600.00A, 6000.0A

1.0%+30d 1.0%+30d

0.2mV/A

60.000mA, 600.00mA 2.0mV/mA

6.0000A, 10.000A

1)

Accuracy unspecified @ <10% of range

2)

10A continuous up to ambient 40oC only, and is <3 mins on per >15 mins off @ 40oC ~

2)

1.2%+40d 1.2%+40d
30mV/A

55oC; >10A to 20A for <30 seconds on per >15 mins off

DC Loop Current %4~20mA (Model 789 only)

4mA = 0% (zero)
20mA = 100% (span)
Resolution: 0.01%
Accuracy:  25d

Temperature (Model 789 only)
RANGE Accuracy

1) 2)

-200.0C to 1090C 1.0%+1.0C

-328.0F to 1994F 1.0%+1.8F

1)

Accuracies assume meter interior has the same temperature (isothermal stage) of the
ambient for a correct junction voltage compensation. Allow the meter and the type-K
probe set to reach isothermal stage for a significant change of ambient temperature. It
can take up to an hour for changes > 5°C.

2)

Type-K thermocouple range & accuracy not included

Hz Logic Level Frequency

RANGE Accuracy

5.000Hz ~ 1.0000MHz 0.002%+4d

1)

Sensitivity: >3.0Vp square wave

2)

Specified with Pulse Width > 0.5s

%Duty Cycle
5V Logic Frequency RANGE Specified Accuracy

1) 2)

5Hz ~ 1kHz 0.10% ~ 99.99%
1kHz ~ 10kHz 1.00% ~ 99.00%
10kHz ~ 500kHz 20.00% ~ 80.00%

3d/kHz+2d

Sensitivity: >3.0Vp square wave

32

~ Hz Line Level Frequency

Function RANGE Sensitivity (Sine RMS) Range

6V 0.4V 10Hz ~ 50kHz
60V 4V 10Hz ~ 50kHz
600V 40V 10Hz ~ 30kHz
1000V 400V 10Hz ~ 5kHz
VFD 600V 40V 10Hz ~ 400Hz
VFD 1000V 400V 10Hz ~ 400Hz

33

600A 40A
6000A 400A

10Hz ~ 5kHz

10Hz ~ 5kHz
60mA 4mA 10Hz ~ 5kHz
600mA 40mA 10Hz ~ 5kHz
6A 0.6A 10Hz ~ 3kHz
10A 6A 10Hz ~ 3kHz
Accuracy: 0.05%+5d

Non-Contact EF-Detection (NCV)

Bar-Graph Indication

EF-H (Hi Sensitivity) EF-L (Lo Sensitivity)

Typical Voltage (Tolerance)

-

- -

- - -

- - - -

- - - - -

25V ( 18V ~ 45V) 60V (50V ~ 140V)

50V (30V ~ 80V) 120V (100V ~ 260V)

80V (70V ~ 160V) 230V (180V ~ 400V)

120V (110V ~250V) 400V (330V ~ 490V)

350V (>270V) 600V (>500V)
Indication: Bar-graph segments & audible beep tones proportional to the field strength
Detection Frequency: 50/60Hz
Detection Antenna: Top-left end of the meter
Probe-Contact EF-Detection (Single-pole): For more precise indication of live wires, such
as distinguishing between live and ground connections, use one single test probe to test via
terminal COM for direct metal contact probing to achieve the most distinctive indications.

RECORD mode (MAX MIN AVG)

34

Function Mode

Added Uncertainty

1)

Min. Volts/Amps

REC Nominal

Update Rate per

Where Available

to Specified Accuracy

Signal Duration

Second

DC
AC
VFD
DC+AC

30d

300d (80d

180d

300d 2)

2) 3)

300ms

)

460ms
800ms

2s

10

5 (10 3))

5

1
nS -- -- 1
Cx -- -- Subject to Cx Values
Hz, T1-T2 -- -- 2
Ω, T1, T2, Others -- -- 5

1)

Specified at Range Locked (Manual-ranging)

2)

Specified at AC Inputs >15% of Range for Model 789

3)

For Model 789 only

CREST mode (Instantaneous Peak Hold)

Accuracy: Specified accuracy  100 digits for changes > 0.35ms in duration
Availability: Voltage and Current functions
Resolution: 6000 counts

AutoHold Real-ReadTM

Accuracy: Specified accuracy  50 digits
Availability: Resistance, Continuity, LoZ AutoV, VFD Volts, Voltage and Current functions

35

- NOTE -

LIMITED WARRANTY

BRYMEN warrants to the original product purchaser that each product it manufactures
will be free from defects in material and workmanship under normal use and service
within a period of one year from the date of purchase. BRYMEN's warranty does not
apply to accessories, fuses, fusible resistors, spark gaps, varistors, batteries or any
product which, in BRYMEN's opinion, has been misused, altered, neglected, or
damaged by accident or abnormal conditions of operation or handling.

To obtain warranty service, contact your nearest BRYMEN authorized agent or send
the product, with proof of purchase and description of the difficulty, postage and
insurance prepaid, to 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.

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE OR USE. BRYMEN WILL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.

BRYMEN TECHNOLOGY CORPORATION

TEL:[phone]

FAX:[phone]

http://www.brymen.com

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