1
Users Manual
• Mode d’emploi
• Bedienungshandbuch
• Manual d’Uso
• Manual de uso
AM-270
Industrial Multimeter with
Bar-graph Display
AM-270
Industrial Multimeter
with Bar-graph Display
Users Manual
May 2010, Rev.1
©2010 Amprobe Test Tools.
All rights reserved. Printed in Taiwan
English
Limited Warranty and Limitation of Liability
Your Amprobe product will be free from defects in material and workmanship for 1
year from the date of purchase. This warranty does not cover fuses, disposable batteries
or damage from accident, neglect, misuse, alteration, contamination, or abnormal
conditions of operation or handling. Resellers are not authorized to extend any other
warranty on Amprobe’s behalf. To obtain service during the warranty period, return the
product with proof of purchase to an authorized Amprobe Test Tools Service Center or
to an Amprobe dealer or distributor. See Repair Section for details. THIS WARRANTY
IS YOUR ONLY REMEDY. ALL OTHER WARRANTIES - WHETHER EXPRESS, IMPLIED OR
STAUTORY - INCLUDING IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE
OR MERCHANTABILITY, ARE HEREBY DISCLAIMED. MANUFACTURER SHALL NOT BE LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES,
ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the
exclusion or limitation of an implied warranty or of incidental or consequential damages,
this limitation of liability may not apply to you.
Repair
All test tools returned for warranty or non-warranty repair or for calibration should be
accompanied by the following: your name, company’s name, address, telephone number,
and proof of purchase. Additionally, please include a brief description of the problem or
the service requested and include the test leads with the meter. Non-warranty repair or
replacement charges should be remitted in the form of a check, a money order, credit
card with expiration date, or a purchase order made payable to Amprobe® Test Tools.
In-Warranty Repairs and Replacement – All Countries
Please read the warranty statement and check your battery before requesting repair.
During the warranty period any defective test tool can be returned to your Amprobe®
Test Tools distributor for an exchange for the same or like product. Please check the
“Where to Buy” section on www.amprobe.com for a list of distributors near you.
Additionally, in the United States and Canada In-Warranty repair and replacement units
can also be sent to a Amprobe® Test Tools Service Center (see next page for address).
Non-Warranty Repairs and Replacement – US and Canada
Non-warranty repairs in the United States and Canada should be sent to a Amprobe® Test
Tools Service Center. Call Amprobe® Test Tools or inquire at your point of purchase for
current repair and replacement rates.
In USA In Canada
Amprobe Test Tools Amprobe Test Tools
Everett, WA 98203 Mississauga, ON L4Z 1X9
Tel: 888-993-5853 Tel: 905-890-7600
Fax: 425-446-6390 Fax: 905-890-6866
Non-Warranty Repairs and Replacement – Europe
European non-warranty units can be replaced by your Amprobe® Test Tools distributor
for a nominal charge. Please check the “Where to Buy” section on www.amprobe.com for
a list of distributors near you.
Amprobe® Test Tools Europe
In den Engematten 14
79286 Glottertal, Germany
tel: +49 (0) 7684 8009 - 0
*(Correspondence only – no repair or replacement available from this address. European
customers please contact your distributor.)customers please contact your distributor.)
AM-270 Industrial Multimeter with Bar-graph Display
1 3-4/5 digits 5000 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 function
5 Input Jack for all functions EXCEPT current (µA, mA, A) functions
6 Common (Ground reference) Input Jack for all functions
7 Input Jack for milli-amp and micro-amp current functions
CONTENTS
SYMBOLS ...............................................................................................................1
UNPACKING AND INSPECTION .............................................................................3
FEATURES ...............................................................................................................3
OPERATION ............................................................................................................4
DC Voltage, AC Voltage, & Hz Frequency Functions .......................................4
Capacitance, Diode Test Function ......................................................5
Temperature Function .....................................................................................6
Resistance, Continuity Functions ............................................................8
Auto Leads Resistance Calibration ...................................................................8
µA, mA, and A Current Functions ...................................................................9
PC-COMM Computer Interface Capabilities ...................................................10
50ms MAX/MIN at Fast 20/s Measurement Mode ...........................................10
0.8ms CREST Capture Mode ............................................................................10
Backlighted Displaye ........................................................................................11
Hold ..............................................................................................................11
Zoom 5x Analog Pointer ...................................................................................11
Relative Mode ..............................................................................................12
Manual or Auto-Ranging .................................................................................12
Beep-Jack™ Input Warning ..............................................................................13
Set Beeper Off ...................................................................................................13
Auto Power Off (APO) ......................................................................................13
Disabling Auto Power Off ................................................................................13
SPECIFICATION .......................................................................................................13
MAINTENANCE AND REPAIR ................................................................................19
Trouble Shooting...............................................................................................19
Cleaning and Storage .......................................................................................20
Battery and Fuse Replacement .........................................................................20
1
SYMBOLS
Caution ! Risk of electric shock
Caution ! Refer to the explanation in this Manual
Double Insulation or Reinforced insulation
Alternating Current (AC).
Direct Current (DC).
Fuse
Earth (Ground)
Please remove all the test leads before preforming maintenance,
cleaning, battery replacement, fuse replacement, etc
Complies with European Directives
Conforms to relevant Australian standards
Do not dispose of this product as unsorted municipal waste.
Contact a qualified recycler for disposal
Safety Information
This manual contains information and warnings that must be followed for
operating the instrument safely and maintaining the instrument in a safe
operating condition. If the instrument is used in a manner not specified by the
manufacturer, the protection provided by the instrument may be impaired.
The meter is intended only for indoor use.
The meter protection rating, against the users, is double insulation per
IEC61010-1 2nd Ed., EN61010-1 2nd Ed., UL61010-1 2nd Ed. and CAN/CSA C22.2
No. 61010.1-0.92 to Category III 1000 Volts AC & DC and Category IV 600 Volts
AC & DC.
Measurement category:
V : Category III 1000 Volts AC & DC, and Category IV 600 Volts AC & DC.
A / mAµA : Category III and Category IV 600 Volts AC and 300 Volts DC.
Per IEC61010-1 2nd Ed. (2001) Measurement Category
2
Measurement Category IV (CAT IV) is for measurements performed at the
source of the low-voltage installation. Examples are electricity meters and
measurements on primary overcurrent protection devices and ripple control
units.
Measurement Category III (CAT III) is for measurements performed in the
building installation. Examples are measurements on distribution boards,
circuit- breakers, wiring, including cables, bus-bars, junction boxes, switches,
socket-outlets in the fixed installation, and equipment for industrial use
and some other equipment, for example, stationary motors with permanent
connection to the fixed installation.
Measurement Category II (CAT II) is for measurements performed on circuits
directly connected to the low voltage installation. Examples are measurements
on household appliances, portable tools and similar equipment.
WARNING
To reduce the risk of fire or electric shock, do not expose this product to
rain or moisture. To avoid electrical shock hazard, observe the proper
safety precautions when working with voltages above 60 VDC or 30 VAC
rms. These voltage levels pose a potential shock hazard to the user. Do
not touch test lead tips or the circuit being tested while power is applied
to the circuit being measured. Keep your fingers behind the finger guards
of the test leads during measurement. Inspect test leads, connectors,
and probes for damaged insulation or exposed metal before using the
instrument. If any defects are found, replace them immediately. Do not
measure any current that exceeds the current rating of the protection
fuse. Do not attempt a current measurement to any circuit where
the open circuit voltage is above the protection fuse voltage rating.
Suspected open circuit voltage should be checked with voltage functions.
Never attempt a voltage measurement with the test lead inserted into
the µA/mA or A input jack. Only replace the blown fuse with the proper
rating as specified in this manual. Only use the accompanied test leads, or
replace with the same rating or better.
CAUTION
Disconnect the test leads from the test points before changing functions.
Always set the instrument to the highest range and work downward for
an unknown value when using manual ranging mode.
3
CENELEC Directives
The instruments conform to CENELEC Low-voltage directive 2006/95/EC and
Electromagnetic compatibility directive 2004/108/EC
UNPACKING AND INSPECTION
Your shipping carton should include:
1 AM-270 Meter
1 Test Leads (1 pair)
1 K Type thermal couple with banana plug
1 Users Manual
1 Single Alkaline 9V battery; NEDA1604A, JIS6AM6 OR IEC6LF22(Installed)
If any of the items are damaged or missing, return the complete package to
the place of purchase for an exchange.
FEATURES
Analog Bar-graph
MS (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
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. The average
value is then scaled upward (calibrated) to read the RMS value of a sine wave. In
measuring pure sinusoidal waveform, this technique is fast, accurate, and cost
effective. In measuring non-sinusoidal waveforms, however, significant errors
can be introduced because of different scaling factors relating average to RMS
values.
True RMS
True RMS is a term which identifies a DMM that responds accurately to the
effective RMS value regardless of the waveforms such as: square, saw tooth,
triangle, pulse trains, spikes, as well as distorted waveforms with the presence
of harmonics. Harmonics may cause :
4
• Overheated transformers, generators and motors to burn out faster than
normal
• Circuit breakers to trip prematurely
• Fuses to blow
• Neutrals to overheat due to the triplen harmonics present on the neutral
• Bus bars and electrical panels to vibrate
Crest Factor
Crest Factor is the ratio of the Crest (instantaneous peak) value to the True
RMS value, and is commonly used to define the dynamic range of a True RMS
DMM. A pure sinusoidal waveform has a Crest Factor of 1.4. A badly distorted
sinusoidal waveform normally has a much higher Crest Factor.
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.
CMRR (Common Mode Rejection Ratio)
Common mode voltage is voltage present on both the COM and VOLTAGE input
terminals of a DMM, with respect to ground. CMRR is the DMM’s ability to reject
common mode voltage effect that can cause digit rolling or offset in voltage
measurements. This series has a CMRR specifications of > 80dB at DC to 60Hz in
ACV function; and > 120dB at DC, 50 and 60Hz in DCV function. If neither NMRR
nor CMRR specification is specified, a DMM’s performance will be uncertain.
OPERATION
CAUTION
Before and after hazardous voltage measurements, test the voltage
function on a known source such as line voltage to determine proper
meter functioning.
DC Voltage, AC Voltage, & Hz Frequency Functions
ImV function defaults at DC. Press SELECT button momentarily to select AC.
Press the Hz push-button momentarily to activate or to exit Hz.
5
Note: Input sensitivity varies automatically with function range selected before
activating the Hz function. mV function has the highest (300mV) and the
1000V range has the lowest (300V). 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 set the most appropriate trigger level. You
can also press the RANGE button momentarily to select another trigger level
manually. If the Hz reading becomes unstable, select lower sensitivity to avoid
electrical noise. If the reading shows zero, select higher sensitivity.
Capacitance, Diode Test Function
Default at . Press SELECT button momentarily to select Diode test
function.
CAUTION
Discharge capacitors before making any measurement. Large value
capacitors should be discharged through an appropriate resistance load.
6
Normal forward voltage drop (forward biased) for a good silicon diode is
between 0.400V to 0.900V. A reading higher than that indicates a leaky
diode (defective). A zero reading indicates a shorted diode (defective). An OL
indicates an open diode (defective). Reverse the test leads connections (reverse
biased) across the diode. The digital display shows OL if the diode is good. Any
other readings indicate the diode is resistive or shorted (defective).
Temperature Function
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.
7
Note: Be sure to insert the banana plug K-type temperature bead probe Bkp60
with correct polarities.
8
Resistance, Continuity Functions
Default at . Press SELECT button momentarily to select
Continuity function that is convenient for checking wiring
connections and operation of switches. A continuous beep tone
indicates a complete wire.
CAUTION
Using resistance or continuity function in a live circuit will produce
false results and may damage the meter. In many cases the suspected
component must be disconnected from the circuit to obtain an accurate
reading.
Auto Leads Resistance Calibration
When entering the 50 range manually by RANGE button for high precision
low resistance measurement, this feature will prompt you to short the inputs
for calibration. The display shows “Shrt”. Simply short the leads for about 3
seconds until the display shows zero, then the resistance in the leads and in the
internal protection circuitry of the meter is compensated automatically. The
compensation value can be as much as 5. If you need a compensation value
that is higher than that, Relative mode is recommended.
9
The shortcut is to short the test leads in auto-ranging resistance mode until
the meter enters the lowest 50 range automatically, press the RANGE button
momentarily to get the “Shrt” prompt, then wait about 3 more seconds until
the display shows zero.
Note: The calibration stays until you change ranges, functions, or go back to
auto-ranging mode.
µA, mA, and A Current Functions
Default at DC. Press SELECT button momentarily to select AC.
*Note: When measuring a 3-phase system, special attention should
be taken to the phase-to-phase voltage which is significantly higher
than the phase-to-earth voltage. To avoid exceeding the voltage
rating of the protection fuse(s) accidentally, always consider the
phase-to-phase voltage as the working voltage for the protection
fuse(s).
10
PC-COMM Computer Interface Capabilities
The instrument equips with an optical isolated interface port at the meter
back for data communication. Optional purchase PC interface kit USB-KIT3
is required to connect the meter to the PC computer. The USB-KIT3 Data
Recording System software equips with a digital meter, an analog meter,
a comparator meter, and a Data Graphical recorder display. Refer to the
README file in the interface kit for further details.
50ms MAX/MIN at Fast 20/s Measurement Mode
Press MAX/MIN button momentarily to activate MAX/MIN recording mode.
The LCD annunciators “MAX MIN” turn on, and the reading update rate will
be increased to 20/second. 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. Press the button for 1 second or more to exit MAX/MIN mode. Auto
Power Off feature will be disabled automatically in this mode.
0.8ms CREST Capture Mode
Press CREST button momentarily to activate CREST (Instantaneous Peak-Hold)
mode to capture voltage or current signal duration as short as 0.8ms. This
mode is available in DCV, ACV, DCA, & ACA functions. The LCD annunciators
“C” & “MAX” 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. Press the button for 1 second or more to exit CREST capture mode.
Auto Power Off feature will be disabled automatically in this mode.
11
Backlighted Display
Press the SELECT button for 1 second or more to turn on or off the display
backlight function. The backlight will also be turned off automatically after 30
seconds to extend battery life.
Hold
The hold function freezes the display for later view. Press the HOLD button
momentarily to activate or to exit the hold function
Zoom 5x Analog Pointer
The Zoom mode analog pointer magnifies up to 5 times the regular analog bar
graph resolution to show minute signal changes with a single analog pointer.
It is virtually equivalent to the bar graph resolution of 5 X 50 = 250 segments.
12
Relative Mode
Relative zero allows the user to offset the meter consecutive measurements
with the displaying reading as the reference value. Practically all displaying
readings can be set as relative reference value including MAX/MIN feature
readings. Press the button momentarily to activate and to exit relative zero
mode.
Manual or Auto-Ranging
Press the RANGE button momentarily to select manual-ranging, and the meter
will remain in the range it was in, the LCD annunciator turns off. Press
the button momentarily again to step through the ranges. Press and hold the
button for 1 second or more to resume auto-ranging.
Note: Manual ranging feature is not available in Hz function.
13
Beep-JackInput Warning
The meter beeps as well as displays “InErr” to warn the user against possible
damage to the meter due to improper connections to the µA, mA, or A input
jacks when other function (like voltage function) is selected.
Set Beeper Off
Press the Hz button while turning the meter on to disable the push button
operating beeper feature. However, the continuity and Jack Beep input
warning features remain.
Auto Power Off (APO)
The Auto Power Off (APO) mode turns the meter off automatically to extend
battery life after approximately 17 minutes of no activities. Activities are
specified as: 1) Rotary switch or push button operations, and 2) Significant
measuring readings of above 10% of range or non-OL readings. That is, the
meter will intelligently avoid entering the APO mode when it is under normal
measurements. To wake up the meter from APO, press the SELECT button
momentarily or turn the rotary switch to the OFF position and then turn back
on again. Always turn the rotary switch to the OFF position when the meter is
not in use
Disabling Auto Power Off
Press the RANGE button while turning the meter on to disable the Auto Power
Off (APO) feature.
SPECIFICATIONS
General Specications
Display: 3-4/5 digits 5000 counts lcd display
Update rate: Digital data 5 per second nominal; 52 segments
bar-graph 60 per second nominal
AC SENSING: True RMS
Operating temperature: 0°C to 45°C (32°F to 113°F)
Relative humidity: Maximum relative humidity 80% for
temperature up to 31°C decreasing linearly to
50% relative humidity at 45°C (113°F)
14
Pollution degree: 2
Storage temperature: -20°C to 60°C (-4°F to 140°F), < 80% R.H.
(With battery removed)
Altitude: Operating below 2000m
Temperature coefcient: Nominal 0.15 x (specified accuracy)/ °C @ (0°C -
18°C/32°F – 64.4°F) or 28°C - 45°C/82.4°F - 113°F),
or otherwise specified
Sensing: AC, AC+DC true RMS
Safety: Double insulation per iec61010-1 2nd ed.,
En61010-1 2nd ed., Ul61010-1 2nd ed. & Can/csa
c22.2 No. 61010.1-0.92 To category III 1000v AC
& DC and category IV 600V AC & DC
Overload protections: µA & mA: 1A/600V, IR 10kA or better, F fuse
A: 10A/600V, IR 100kA or better, F fuse
V: 1050VRMS, 1450VPEAK
mV, , & others: 600 VDC & VAC RMS
TERMINALS (TO COM) MEASUREMENT CATEGORY:
V: CATEGORY III 1000V AC & DC AND CATEGORY
IV 600V AC & DC
A / mAµA: CATEGORY III AND CATEGORY IV 600
VAC AND 300 VDC.
TRANSIENT PROTECTION: 8KV (1.2/50µS SURGE)
E.M.C.: Meets en61326-1:2006 (EN55022, EN61000-3-
2, EN61000-3-3, EN61000- 4-2, EN61000-4-3,
EN61000-4-4, , EN61000-4-5, EN61000-4-6,
EN61000-4- 8, EN61000-4-11)
In an RF eld of 3V/m: Capacitance function is not specified
Power supply: Single standard 9V battery NEDA1604, JIS006P
OR IEC6F22
Power consumption: 4.3mA typical
Low battery: Below approx. 7V
Apo timing: Idle for 17 minutes
Apo consumption: 50µA typical
15
Dimension: 186mm/7.3in (L) x 87mm/3.4in (W) x
35.5mm/1.4in (H); 198mm/7.8in (L) x 97mm/3.8in
(W) x 55mm/2.2in (H) with holster
Weight: 340g/0.8lb; 430g/1.0lb with holster
Electrical Specications
Accuracy is (% reading digits + number of digits) or otherwise specified, at
23°c 5°c & less than 75% relative humidity.
ACV & ACA accuracies are specified from 5 % to 100 % of range or otherwise
specified. maximum crest factor <3:1 at full scale & <6:1 at half scale, and with
frequency spectrums, besides fundamentals, fall within the meter specified AC
bandwidth for non-sinusoidal waveforms.
DC Voltage
RANGE ACCURACY
50.00 MV 0.12% + 2D
500.0 MV 0.06% + 2D
5.000V, 50.00V, 500.0V, 1000V 0.08% + 2D
NMRR: >60DB @ 50/60HZ
CMRR: >120DB @ DC, 50/60HZ, RS=1K
Input Impedance: 10M, 16pF nominal (44pF nominal for 50mV & 500mV
ranges)
AC Voltage
RANGE ACCURACY
50HZ -- 60HZ
50.00MV, 500.0MV, 5.000V,
50.00V,500.0V, 1000V
0.5% + 3D
40HZ -- 500HZ
50.00MV, 500.0MV 0.8% + 3D
5.000V, 50.00V, 500.0V 1.0% + 4D
1000V 1.2% + 4D
16
UP TO 20KHZ
50.00MV, 500.0MV 0.5DB*
5.000V, 50.00V, 500.0V 3DB*
1000V UNSPEC'D
*SPECIFIED FROM 30% TO 100% OF RANGE
CMRR: >60DB @ DC TO 60HZ, RS=1K
Input Impedance: 10M, 16pF nominal (44pF nominal for 50mV & 500mV
ranges)
DC Current
RANGE ACCURACY BURDEN VOLTAGE
500.0µA
0.2%+4D
0.15MV/µA
5000µA 0.15MV/µA
50.00MA 3.3MV/MA
500.0MA 3.3MV/MA
5.000A 45MV/A
10.00A* 45MV/A
*10a continuous, >10a to 15a (to 20a for cf-version) for 30 second max with 5
minutes cool down interval
AC Current
RANGE ACCURACY BURDEN VOLTAGE
50HZ -- 60HZ
500.0µA
0.6%+3D
0.15MV/µA
5000µA 0.15MV/µA
50.00MA 3.3MV/MA
500.0MA 1.0%+3D 3.3MV/MA
17
5.000A 0.6%+3D 45MV/A
10.00A* 45MV/A
40HZ --1KHZ
500.0µA 0.8%+4D 0.15MV/µA
5000µA 0.8%+4D 0.15MV/µA
50.00MA 0.8%+4D 3.3MV/MA
500.0MA 1.0%+4D 3.3MV/MA
5.000A 0.8%+4D 45MV/A
10.00A* 0.8%+4D 45MV/A
*10a continuous, >10a to 15a (to 20a for cf-version) for 30 second max with 5
minutes cool down interval
Ohms
RANGE ACCURACY
50.000.3% + 6D
500.00.1% + 3D
5.000K, 50.00K, 500.0K0.1% + 2D
5.000M0.4% + 3D
50.00M2.0% + 5D
open circuit voltage : < 1.3vdc
(< 3vdc for 50 & 500 ranges)
Audible Continuity Tester
Audible threshold: between 20 and 200 response time < 100µS
Crest Mode for V & A functions
Accuracy: specified accuracy 150 digits for changes > 0.8 ms in duration
18
Frequency
FUNCTION SENSITIVITY
(SINE RMS)
RANGE
MV 300MV 10HZ - 125KHZ
5V 2V 10HZ - 125KHZ
50V 20V 10HZ - 20KHZ
500V 80V 10HZ - 1KHZ
1000V 300V 10HZ - 1KHZ
, CX, DIODE 300MV 10HZ - 125KHZ
µA, MA, A 10% F.S. 10HZ - 125KHZ
Accuracy: 0.01% + 2D
Diode Tester
RANGE ACCURACY TEST CURRENT
(TYPICAL)
OPEN CIRCUIT
VOLTAGE
2.000V 1%+1D 0.4MA < 3.5 VDC
Capacitance
RANGE ACCURACY*
50.00nF 0.8% + 3D
500.0nF 0.8% + 3D
5.000µF 1.5% + 3D
50.00µF 2.5% + 3D
500.0µF** 3.5% + 5D
9999µF** 5.0% + 5D
*Accuracies with film capacitor or better
**In manual-ranging mode, measurements not specified below 45.0µF and
450µF for 500.0µF and 9999µF ranges respectively
19
Temperature
RANGE ACCURACY*
-50 OC TO 1000 OC 0.3% + 3D
-58 OF TO 1832 OF 0.3% + 5D
*Thermocouple range & accuracy not included
MAINTENANCE AND REPAIR
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
Calibration
Periodic calibration at intervals of one year is recommended to maintain meter
accuracy. Accuracy is specified for a period of one year after calibration.
If self-diagnostic message “rE-O” is being displayed while powering on, the
meter is re-organizing internal parameters. Do not switch off the meter then,
and it will be back to normal measurement shortly. However, if self-diagnostic
message “C_Er” is being displayed while powering on, some meter ranges
might be largely out of specifications. To avoid mis-leading measurements,
stop using the meter and send it for re-calibration. Refer to the LIMITED
WARRANTY section for obtaining warranty or repairing service.
Trouble Shooting
If the instrument fails to operate, check battery, fuses, leads, etc., and replace
as necessary. Double check operating procedure as described in this user’s
manual. If the instrument voltage-resistance input terminal has subjected to
high voltage transient (caused by lightning or switching surge to the system)
by accident or abnormal conditions of operation, the series fusible resistors will
be blown off (become high impedance) like fuses to protect the user and the
instrument. Most measuring functions through this terminal will then be open
circuit. The series fusible resistors and the spark gaps should then be replaced
by qualified technician. Refer to the LIMITED WARRANTY section for obtaining
warranty or repairing service.
20
Cleaning and Storage
Periodically wipe the case with a damp cloth and mild detergent; do not use
abrasives or solvents. If the meter is not to be used for periods of longer than
60 days, remove the battery and store it separately.
Battery and Fuse Replacement
Battery use:
9V alkaline battery NEDA1604A, JIS6AM6 or IEC6LF22
Fuse:
Fuse (FS1) for µAmA current input:1A/600V, IR 10kA or better, F fuse;
Fuse (FS2) for A current input: 10A/600V, IR 100kA or better, F fuse
Battery replacement for models with battery access door:
Loosen the 2 screws from the battery access door of the case bottom. Lift the
battery access door and thus the battery compartment up. Replace the battery.
Re-fasten the screws.
Fuse replacement:
Loosen the 4 screws from the case bottom. Lift the end of the case bottom
nearest the input jacks until it unsnaps from the case top. Replace the blown
fuse(s) and/or the battery. Replace the case bottom, and ensure that all the
gaskets are properly seated and the two snaps on the case top (near the LCD
side) are engaged. Re-fasten the screws.