USER’S MANUAL
99 Washington Street
Melrose, MA 02176
800.517.8431
TestEquipmentDepot.com
DUAL DISPLAY L/C/R METER
MZ-505C
- 0 MI1972 -
SAFETY NOTES
Read the instruction manual before using the equipment, mainly
"SAFETY RULES" paragraph.
The symbol on the equipment means "SEE USER’S
MANUAL". In this manual may also appear as a Caution or Warning
symbol.
Warning and Caution statements may appear in this manual to
avoid injury hazard or damage to this product or other property.
INSTRUCTION MANUAL. MZ-505C
TABLE OF CONTENTS
1 GENERAL .....................................................................................1
1.1 Introduction .........................................................................1
1.2 Specifications......................................................................2
2 SAFETY RULES ........................................................................... 7
3 OPERATING INSTRUCTIONS .....................................................9
3.1 Description of the controls and elements............................9
3.2 LCD Display illustration.....................................................11
3.3 How to operate..................................................................13
3.3.1 Inductance measurement............................................13
3.3.2 Capacitance measurement .........................................14
3.3.3 Resistance measurement............................................ 15
4 OPERATING INSTRUCTIONS ...................................................17
4.1 Autopower down ...............................................................17
4.1.1 Continuous Mesurement .............................................17
4.1.2 Power Switch............................................................... 17
4.2 Frequency select............................................................... 18
4.3 Parallel/Series mode.........................................................18
4.4 RANGE Button.................................................................. 18
4.5 L/C/R Function button (only main indicator)...................... 19
4.6 Q/ D/ R FUNCTION BUTTON (secondary display)...........19
4.7 HOLD. > 2sec. ..................................................................19
4.8 MIN/ MAX BUTTON.......................................................... 20
4.9 SET ...................................................................................21
4.10 REL. Relative mode (only Main display) ...........................23
4.11 HI/LO LIMITS ....................................................................24
4.12 TOL ...................................................................................24
4.13 Automatic fuse status detection ........................................25
4.14 Calibration ......................................................................... 26
4.15 Low battery indication .......................................................27
5 MAINTENANCE ..........................................................................29
5.1 Service ..............................................................................29
5.2 Battery replacement.......................................................... 29
5.3 Fuse replacement .............................................................30
5.4 Cleaning recommendations ..............................................31
User’s manual. MZ-505C
INSTRUCTION MANUAL. MZ-505C
DUAL DISPLAY L/C/R METER
MZ-505C
1 GENERAL
1.1 Introduction
This 19.999 count L/C/R hand-held meter is a special
microprocessor-controlled meter for measuring functions of
inductance, capacitance and resistance. Simple to operate, the
instrument not only takes absolute parallel mode measurements, but
also capable of series mode measurement. The meter provides
direct and accurate measurements of inductors, capacitors and
resistors with different testing frequencies. It is selectable for auto
and manual ranging.
Front panel pushbuttons maximize the convenience of function
and feature selection such as data hold; maximum, minimum and
average record mode; relative mode; tolerance sorting mode;
frequency and L/C/R selection.
The test data can be transferred to PC through an full isolated
optical RS232C interface.
A tilt stand provides position flexibility for viewing and operating
the meter. The over-melding plastic and rubber case protects the
meter to be stronger. With single 9V battery operation is standard for
the meter, a DC 12V power adaptor can also be used as an optional
power input.
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1.2 Specifications
INSTRUCTION MANUAL. MZ-505C
Parameters measured LS + (Q, D, RS), LP + (Q, D, RP), CS
+ (Q, D, RS), C
Displays
L/C/R Maximum Display 4 ½ digit 19999
counts.
Q/D/R Display 4 digit 999.9 count
maximum (Autoranging).
Measuring ranges
C (120 Hz) 1 pF ~ 10 mF (basic accuracy
0.7 %).
C (1 kHz) 0.1 pF ~ 1000 μF (basic accuracy
0.7 %).
L (120 Hz) 1 μH ~ 10000 H (basic accuracy
0.7 %).
L (1 kHz) 0.1 μH ~ 1000 H (basic accuracy
0.7 %).
R 1 mΩ ~ 10 MHΩ (basic accuracy
0.5 %).
Resolution
R Up 0.001 Ω.
L Up 0.1 μH.
C Up 0.1 pF.
Ranging mode Auto & Manual.
Measuring terminals 2 terminals with sockets.
Test frequency 1 KHz, 120 Hz.
Tolerance mode 1 %, 5 %, 10 %, 20 %.
Measuring rate 1 measurement x seconds, nominal.
Response time Approx. 1 second at manual range.
Auto power-off 10 minutes approx. without
operation.
Temperature coefficient 0,15 x (specific accuracy)/°C
(0-18 °C and 28-40 °C).
P
+ (Q, D, RP).
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INSTRUCTION MANUAL. MZ-505C
-
Low battery indicator The symbol
+
appears on the
screen.
Voltage measurement 600 mV AC.
Input protection Fuse.
POWER SUPPLY
Internal Battery 9 V IEC6F22.
External 12 to 15 V DC.
Consumption Aprox. 12 mA for operation
0.03 mA After auto power-off
Operating environmental conditions
Altitude Up to 2000 m
Temperature range From 0 °C to 40 °C
Max. relative humidity 80 % (up to 31 °C), decreasing
lineally up to 50% at 40 °C
Mechanical properties
Dimensions L. 91 x W. 192 x H. 52,5 (mm).
Weight Aprox. 365 gr. (Accessories
Included).
Standard accessories Test alligator clips (pair).
Kit for RS-232 + software.
DC 9V battery (IEC 6F22 ).
Instruction Manual.
Optional accessories SMD Tweezers PP-009.
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INSTRUCTION MANUAL. MZ-505C
Ranges and accuracies
Accuracy ± (% of reading ± num. of digits) at 23°C ±5°C, RH<75%.
Resistance
Test Frequency: 120 Hz / 1 KHz
Range
10 MΩ 10 MΩ ±(2.0%+8 dig) ± (2.0%+8 dig)
2MΩ 1.9999MΩ ± (0.5%+5 dig) ± (0.5%+5 dig)
200kΩ 199.99kΩ ± (0.5%+3 dig) ± (0.5%+3 dig)
20kΩ 19.999kΩ ± (0.5%+3 dig) ± (0.5%+3 dig)
2kΩ 1.9999kΩ ± (0.5%+3 dig) ± (0.5%+3 dig)
200Ω 199.99Ω ± (0.8%+5 dig) ± (0.8%+5 dig)
20Ω 19.999Ω ± (1.2%+4 dig) ± (1.2%+4 dig)
Maximum
Display
Accuracy
at 120 Hz at 1 KHz
Specified Note
After open cal.
After open cal.
-
-
After short cal.
After short cal.
Capacitance
Test Frequency: 120 Hz
Range
2000μF 1999.9μF
2000nF 1999.9nF
Maximum
Display
20mF 10mF
200μF 199.99μF
20μF 19.999μF
200nF 199.99nF
20nF 19.999nF
Capacity. DF
Accuracy
± (5.0%+5 dig)
DF<0.1
± (1.0%+5 dig)
DF<0.1
± (0.7%+3 dig)
DF<0.5
± (0.7%+3 dig)
DF<0.5
± (0.7%+3 dig)
DF<0.5
± (0.7%+5 dig)
DF<0.5
± (1.0%+5 dig)
DF<0.1
± (10%+100/Cx+5 dig)
(DF<0.1)
± (2%+100/Cx+5 dig)
(DF<0.1)
± (0.7%+100/Cx+5 dig)
(DF<0.5)
± (0.7%+100/Cx+5 dig)
DF<0.5
± (0.7%+100/Cx+5 dig)
DF<0.5
± (0.7%+100/Cx+5 dig)
DF<0.5
± (2%+100/Cx+5 dig)
DF<0.1
Specified
Note
After short
cal.
After short
cal.
-
-
-
After open
cal.
After open
cal.
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INSTRUCTION MANUAL. MZ-505C
Test Frequency: 1 KHz
Range
2000μF 1000.0μF
200μF 199.99μF
20μF 19.999μF
2000nF 1999.9nF
200nF 199.99nF
20nF 19.999nF
2000pF 1999.9pF
Maximum
Display
(2)
(3)
Capacity. DF
Accuracy
± (5.0%+5 dig)
DF<0.1
± (1.0%+5 dig)
DF<0.1
± (0.7%+3 dig)
DF<0.5
± (0.7%+3 dig)
DF<0.5
± (0.7%+3 dig)
DF<0.5
± (0.7%+5 dig)
DF<0.5
± (1.0%+5 dig)
DF<0.1
± (10%+100/Cx+5 dig)
DF<0.1
± (2.0%+100/Cx+5 dig)
DF<0.1
± (0.7%+100/Cx+5 dig)
DF<0.5
± (0.7%+100/Cx+5 dig)
DF<0.5
± (0.7%+100/Cx+5 dig)
DF<0.5
± (0.7%+100/Cx+5 dig)
DF<0.5
± (2.0%+100/Cx+5 dig)
DF<0.1
Specified
Note
After short
cal.
After short
cal.
-
-
-
After open
cal.
After open
cal.
Notes: Q Value is the reciprocal of DF (dissipation factor).
This specification is based on the measurement performed
at the test socket.
Inductance
Test Frequency: 120 Hz
Range
Maximum
Display
20000H 10000H
1000H 999.9H
200H 199.99H
20H 19.999H
2000m 1999.9mH
200m 199.99mH
20m 19.999mH
Inductance DF
unspecified unspecified
± (1.0%+ Lx/10000% +5 dig)
± (0.7%+ Lx/10000%+5 dig)
± (0.7%+ Lx/10000%+5 dig)
± (0.7%+ (Lx/10000)%+5
± (1.0%+ Lx/10000%+5 dig)
± (2.0%+ Lx/10000%+5 dig)
DF<0.5
DF<0.5
DF<0.5
dig) DF<0.5
DF<0.5
DF<0.5
Accuracy
(2%+100/Lx+5 dig)
DF<0.5
(1.2%+100/Lx+5 dig)
DF<0.5
(1.2%+100/Lx+5 dig)
DF<0.5
(1.2%+100/Lx+5 dig)
DF<0.5
(3%+100/Lx+5 dig)
DF<0.5
(10%+100/Lx+5 dig)
DF<0.5
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Specifie
d Note
-
After
open cal.
-
-
-
After
short cal.
After
short cal.
Test Frequency: 1 KHz
INSTRUCTION MANUAL. MZ-505C
DF<0.5
DF<0.5
DF<0.5
DF<0.5
DF<0.5
DF<0.5
Accuracy
± (2.0%+100/Lx+5 dig)
± (1.2%+100/Lx+5 dig)
± (1.2%+100/Lx+5 dig)
± (1.2%+100/Lx+5 dig)
± (3.0%+100/Lx+5 dig)
± (10%+100/Lx+5 dig)
DF<0.5
DF<0.5
DF<0.5
DF<0.5
DF<0.5
DF<0.5
Specifie
d Note
After
open
cal.
-
-
-
After
short
cal.
After
short
cal.
Range
Maximu
m
Display
2000H 1000.0
200H 199.99H
20H 19.999H
2000mH 1999.9mH
200mH 199.99mH
20mH 19.999mH
2000μH 1999.9μH
Inductance DF
unspecified unspecified
± (1.0%+ Lx/10000%+5 dig)
± (0.7%+ Lx/10000%+5 dig)
± (0.7%+ Lx/10000%+5 dig)
± (0.7%+ Lx/10000%+5 dig)
± (1.0%+ Lx/10000%+5 dig)
± (2.0%+ Lx/10000%+5 dig)
Notes: Q Value is the reciprocal of DF.
This specification is based on the measurement performed
at the test socket.
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INSTRUCTION MANUAL. MZ-505C
2 SAFETY RULES
* The safety could not be assured if the instructions for use
are not closely followed.
* When measuring components in circuit you must previously
disconnect the power supply.
* When measuring capacitors is necessary to discharge them
previously.
* When using some of the following accessories use only the
specified ones to ensure safety:
Battery 9V 6F22.
* Observer all specified ratings both of supply and
measurement.
* Use this instrument under the specified environmental
conditions.
* Remember that voltages higher than 70 V DC or 33 V AC rms
are dangerous.
* The user is only authorised to carry out the following
maintenance operations:
Replace the battery.
Fuse replacement
On the Maintenance paragraph the proper instructions are given.
Any other change on the equipment should be carried out by
qualified personnel.
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INSTRUCTION MANUAL. MZ-505C
* Follow the cleaning instructions described in the Maintenance
paragraph.
* Symbols related with safety:
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INSTRUCTION MANUAL. MZ-505C
3 OPERATING INSTRUCTIONS
3.1 Description of the controls and elements.
Figure 1.- MZ-505C, front panel.
1. LCD display.
2.
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Power ON/OFF button.
3. Scale button.
INSTRUCTION MANUAL. MZ-505C
4.
5.
6.
7.
8.
Standby button and data on the backlight.
Mode Selection button on.
Test button frequency selection.
Button Parallel or Serial selection.
Resistance function selection button, Capacity and
Inductance.
9.
10.
11.
12.
13.
Selection button Q/D/R.
Read-button preset selection Max, Min and Average.
Adjustment Button.
Adjustment knob upper and lower limits.
Tolerance selection button.
14. Input terminals and sockets.
15. RS-232 Output optocoupler.
16. 12V DC input connector. External power supply.
17. Optic interface.
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INSTRUCTION MANUAL. MZ-505C
3.2 LCD Display illustration
. APO On AutoShutdown indicator. 1
2. RS232 indicator.
3. Record mode indicator.
4.
Δ
Mode indicator on.
5. MAX Maximum reading indicator.
6. TOL Tolerance mode indicator.
7. MIN Minimum reading indicator.
8. AVG Average reading indicator.
9. R Indicator of resistance in series or parallel.
Figure 2.- LCD Display.
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10. Q Quality factor indicator.
11. D Dissipation factor indicator.
12. SER Series mode indicator.
13. PAL Parallel mode indicator.
8888
14.
15. % Tolerance (percentage) indicator.
16. KMΩ Resistance (MΩ / kΩ / Ω) indicator.
17. 1kHz Frequency indicator.
18. 120Hz Frequency indicator.
19.
20. KMΩ Resistance (MΩ / kΩ / Ω) indicator.
21.
mH Inductance (μH / mH, H) indicator.
μ
22. n
μ
23. AUTO Auto-ranging indicator.
24.
25. SET Mode Indicator Set.
26. LCR L=inductance, C=capacitance or R=resistance
27.
Secondary display.
Beeper tone indicator for tolerance mode.
npF Capacitance (pF / μF / mF / F) indicator.
Indicator data retention.
function indicator.
Indicator of high tolerance limits.
INSTRUCTION MANUAL. MZ-505C
28.
29.
Page 12 04/2015
Indicator of low tolerance limits.
: Low battery indicator.
INSTRUCTION MANUAL. MZ-505C
Special indication characters
shrt
OPEN
CAL
FUSE
Indicates short connectors for calibration mode
Indicates open connectors for calibration mode
Indicates calibration mode.
Indicates damaged or open fuse.
3.3 How to operate
CAUTION
Note: For achieving optimum precision for all L, C and R
measurements at either the highest or lowest ranges, it is
recommended to calibrate the meter before testing.
3.3.1 Inductance measurement
1. Press the [2] button to turn on the meter.
2. Press
measurement.
3. Insert an inductor into component receptacle socket or
connect the test clip to the component leads as required.
4. Press
[8] button to select inductance (L)
[6] button to select testing frequency.
5. Press
[9] button to select Q factor for secondary
display.
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6. Read the display readings for inductance value and quality
factor.
INSTRUCTION MANUAL. MZ-505C
Figure 3.- Inductance measurement
3.3.2 Capacitance measurement
1. Press
[2] button to turn on the meter.
2. Press
[8] button to select capacitance (C)
measurement.
3. Insert a capacitor into the component receptacle socket or
connect the test clip to the component leads as required.
4. Press
[6] button to select testing frequency.
5. Press [9] button to select D factor for secondary
display.
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INSTRUCTION MANUAL. MZ-505C
6. Read the display readings for capacitance value and
dissipation factor.
Warning
To avoid electrical hazards, discharge the capacitor to be tested
before measuring.
Figure 4.- Capacitance measurement
3.3.3 Resistance measurement
1. Press
[2] button to turn on the meter.
2. Press [8] button to select Resistance (R)
measurement.
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3. Insert a resistor into the component receptacle socket or
connect the test clip to the component leads as required.
INSTRUCTION MANUAL. MZ-505C
4. Press
[6] button to select testing frequency.
5. Read the display readings for resistance value.
Figure 5.- Resistance measurement.
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INSTRUCTION MANUAL. MZ-505C
4 OPERATING INSTRUCTIONS
4.1 Autopower down
If unused for about 10 minutes, the meter will power down
automatically. Press
mode.
When the power is down, press
meter. The operating condition return to what they were before the
power was last turned off.
In the MIN MAX record mode, RS-232 communication mode or
using DC power-adaptor auto-power down function is disabled
automatically.
4.1.1 Continuous Mesurement
In the power down mode, Push
the APO OFF annunciator appears. Will put the meter into the
continuous measurement mode.
4.1.2 Power Switch
The
[2] button turns the meter on or off. In the
microcomputer failure status press
off.
[2] button switches to resume power-on
[2] button to turn on the
[2] button 2 seconds. Until
[2] button until the meter
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INSTRUCTION MANUAL. MZ-505C
4.2 Frequency select
Set the [6] button switch to 120 Hz or 1 kHz according to
the specimen to be test. Generally, the electrolytic capacitor is set to
120 Hz. Others are set to 1 kHz in general.
4.3 Parallel / Series mode
Set the [7] button switch to parallel or series measuring
circuit mode. However, in the specimen having a high impedance in
general, measurement is made in “parallel equivalent circuit” mode
“PAL”, while in the specimen having a low impedance,
measurement is made in “series equivalent circuit” mode “SER”.
Note: For resistances (R) is only available the parallel (PAL) mode.
4.4 RANGE Button
Press
[4] button to select the Manual Range mode and
turn off the “AUTO” enunciator. (The meter remains in the range it
was in when manual ranging was selected).
In the Manual Range mode. Each time press
[4] button,
the range (and the input range enunciator) increments, and a new
value displayed. To exit the Manual Range mode and return to
autoranging, press and hold down
[4] button for 2 seconds.
The “AUTO” enunciator turns back on.
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INSTRUCTION MANUAL. MZ-505C
4.5 L/C/R Function button (only main indicator)
The
key switch the measurement parameter in sequence
Q-D-R-Q..., the enunciator is indicated on LCD.
When the meter is turned on, it is set to the measurement
parameter selected that was in use when the meter was last turned
off.
4.6 Q/ D/ R FUNCTION BUTTON (secondary display)
The
[9] key switch the measurement parameter in
sequence Q-D-R-Q..., the enunciator is indicated on LCD.
When the meter is turned on, it is set to the measurement
parameter selected that was in use when the meter was last turned
off.
4.7 HOLD. > 2sec.
Press the
enunciator is displayed.
When Hold mode is selected, the meer stops all further
measurements. Press
press this key for 2 seconds to exit the Backlit function.
After starting the Backlit for 1 minute, the Backlit function will exit
by itself.
[4] key to enter the data hold mode, the “HOLD”
[4] 2 seconds to start backlit function,
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4.8 MIN/MAX BUTTON
INSTRUCTION MANUAL. MZ-505C
Press
[6] to enter the MIN/MAX/AVG mode, and stop the
auto shut down function. In addition to power and hold key, the other
keys cannot be activated. When the meter samples about 6 times,
and then beeper will emit a sound. When a new Max/Min data being
recorded and then beeper will emit 2 sounds.
Main display value (second display value) cycles through
[6] present value (parameter value) → Max value (parameter value)
→ Min Value (parameter value) → Max value minus Min value
(times to test) → The Average Value's displauy (times to test).
The meter will ignore and not to record if overload (“OL”)
situation happens in the comparative processes or in the
capacitance range 50 counts.
The average value's display is true average recording. It can
save up to 3000 times, the “AVG” annunciator will flash when
recording times reaching 2991 to 3000 times. When recording over
3000 times the “AVG” will stop to record and it will also display the
average value on the LCD. The meter continues to record the
MAX/MIN value.
Under the MAX/MIN function, press
[4] key to stop
recording temporarily but store the former recording value in
advance, pres
[4] again to go on recording.
In order to prevent any mistakes or losses taken, you have to
press 2 sec to exit the Max/ Min function and cancel the original
recordings.
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INSTRUCTION MANUAL. MZ-505C
4.9 SET
1. The [11] can only be activated only before you have
not used any other functions.
2. Press [11] to enter the SET mode, and change to
manual range mode automatically.
3. While in the SET function, the main display is cleared, the
second display shows “SET” annunciators, LCD shows, ^,
TOL, ^,^ flashing. There are only 5 keys that you can use
[2], [11], [5], [12], [13] in this
moment.
4. OPEN, SHORT calibration:
Press [11], LCD will display CAL open, and press
[7] (ENTER), the program enters “OPEN” calibration,
after completing the open. The LCD displays CAL, Shrt,
press
[7]. The program enters Short calibration. If you
do not want to proceed Short Calibration, and press
[11], to exit. When LCD shows
CAL Shrt, press [7]
(ENTER) key. The program enters “SHORT” calibration. And
then back to normal situation.
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INSTRUCTION MANUAL. MZ-505C
5. Hi/Lo Limits Settings:
Press [12], LCD only shows “ ” flashing. The
previous setting Hi will also appear and let user to do the
modifications. When you input Lo setting value, the
annunciator “
” is flashing. The previous setting Lo will
also appear and let user to do the modifications.
When the Lo setting value is greater than the Hi setting
value, the LCD shows Err and back to the Hi setting mode.
Please to enter the new Hi/Lo setting value.
6. TOL Hi/Lo Limits Setting:
Press
[13], LCD shows TOL flashing. The previous
setting standard value will also appear and let user to do the
modifications. When you in out + TOL setting value, the
annunciators “TOL” “
” are flashing. The previous setting
+ TOL will also appear and let user to do the modifications.
When you input — TOL setting value, the annunciators “TOL”
” are flashing. The previous setting — TOL will also
“
appear and let user to do the modifications.
7. REL Setting:
Press , LCD shows D flashing. The previous standard
setting value ell also appear and let user to do the
modifications.
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INSTRUCTION MANUAL. MZ-505C
8. Data Setting:
When using the character on the name plate to input data,
the previous setting will appear, and the place that waits to
be entered will flash. INPUT starts from the largest digit to
enter, the largest digit only 1, In that case the original setting
will flash. The original setting is 0, and the bottom part of
seven segments will flash. Press “1” is 1, press any keys is
0, press “ENTER” to exit without change. TOL Hi/Lo limits
setting without largest digit. There is no annunciator flashing
after entering 5 digits, In the mean time enters +/- symbols,
press “o” to change +/- symbols, press other keys to input +
symbol.
Caution: Press “ENTER”, emit two beeps, the data store in
volatile storage. The data will store in nonvolatile storage
region whle the meter power off. In this mode the
4.10 REL. Relative mode (only Main display)
automatic power-off feather is disabled.
Press [5] key to the Relative mode. The displayed reading
is stored as a reference value, the display is zeroed and annunciator
“
Δ” is displayed. Press [5] key again to exit the Relative mode.
For example: the displayed reading is 100.0, then press
[5] to store as a reference value, and the display become zero, to
store 100.0 as a standard reference value, if our input signal is 99,5
then the reading will be 99.5-100.0 that equals -0.5.
04/2015 Page 23
The user (see “SET” in this manual can also set the relative
value). When the desired relative value has been entered, press
[5] key to enter the Relative mode, and press [11] key to
INSTRUCTION MANUAL. MZ-505C
use Relative value as a reference value. Press
[5] again to exit
the relative Mode.
4.11 HI/LO LIMITS
Press
[12] to enter the Hi/Lo LIMITS mode, and change to
manual range mode, the original Hi/Lo LIMITS value and
annunciators “
” “ ” appear in the same time individually.
When the input exceeds Hi limits, the “
a continuous tine. When the input goes below the Lo limits, the “
” is blinking and emits
”
is blinking and the beeper emits a pulse tone. This warns users that
out of setting ranges, press “Hi/Lo LIMITS” again to exit this mode.
In additions, the meter will ignore and not to record if overload
(“OL”) situation happens in the comparative processes or in the
capacitance range 50 counts.
4.12 TOL
Press
[13] to enter the tolerance mode, and change to
manual range mode automatically, the original preset standard value
and enunciators “TOL” appear in the same time individually. How to
set standard value please refer to SET in this manual. When
entering TOL mode, the Main display is the present value and the
second display is tolerance value.
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INSTRUCTION MANUAL. MZ-505C
There are 4 preset values in the TOL mode for instant use, just
to press
[13] again to cycle through 1%, 5%, 10%, 20% then
back to the present. When entering the TOL mode, and the
enunciator “
exceeds Hi limits, the “
tone. When the Input goes below LO limits, the “
” “ ” will appear in the same time, when the input
” is blinking and also emits a continuous
” is blinking and
the beeper emits a pulse tone. This warns users that out of setting
ranges.
The standard value can be set by SET function, press refer to
SET setting in this manual. When standard value have set, and
press
[13]then press [11] to use preset TOL setting.
In additions, the meter will ignore and not to record if overload
(“OL”) situation happens in the comparative processes or in the
capacitance range 50 counts. Press
[13] 2 sec to exit this
function.
4.13 Automatic fuse status detection
When the meter detects that the protective fuse is open, the
"
FUSE" character will appear and an internal beep will sound
continuously. In this situation, none of the function keys can be
operated and all other meter functions will be discontinued. Fuse
replacement is required.
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INSTRUCTION MANUAL. MZ-505C
4.14 Calibration
Figure 6.- Fuse detection.
The calibration process is activated automatically in certain
types of measurement and according to the range, although also it is
possible to be carried out manually in any range. Simply press
[11] button for more twice to enter the calibration mode and
calibration prompts will be displayed. Il on screen appears the
indication (
indication (
Open) hold the test leads terminals open. If it appears
shrt) short-circuit the test leads terminals and press
"CAL" key again. After calibration is completed, the meter will be
restored to normal display and ready for normal usage.
Figure 7.- Open / Short calibration
The function calibrates the meter’s internal parameters as well
as external connector residues and measurement cables for further
measuring. It is highly recommended to calibrate extremely high or
low ranges for L, C and R before making precision measurements.
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INSTRUCTION MANUAL. MZ-505C
Calibration prompts will be displayed automatically every time
those ranges are manually or functionally selected, (e.g. REL, TOL,
REC etc.), and calibration is recommended. Simply follow the open
connector (
Open) or short connector (shrt) instruction and then
press the
the
[11] button. You may skip the calibration by pressing
[9] button.
Notes: 1.- Changing measurement frequencies is handled the
same as selecting a different hardware range, and so
automatic calibration prompts will be displayed in the
recommended ranges.
2.- Be sure to use same testing position after short
calibration.
4.15 Low battery indication
When the “
voltage is below normal working voltage and is weakening. Replace
battery with a new one to maintain accuracy of the meter.
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” symbol flashes on the display, the battery
INSTRUCTION MANUAL. MZ-505C
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INSTRUCTION MANUAL. MZ-505C
5 MAINTENANCE
WARNING
To avoid electrical shock, do not perform any service unless you are
qualified to do so.
5.1 Service
If the instrument fails to operate, to check battery and test leads,
and replaces them if necessary. If the instrument still can’t work,
double check operating procedure as described in this instruction
manual. When servicing, use specified replacement parts only. The
meter must be completely turned off while replacing either the fuse
or battery.
5.2 Battery replacement
The meter is powered with a single 9V battery, IEC6F22 carbonzinc or alkaline battery. Replace battery if the low battery sign (
is displayed and flashing. Use the following procedures to replace
the battery:
1. Remove the screws with suitable screwdriver and remove
battery cover as figure 10.
2. Replace the degraded battery with a new battery respecting
the indicated polarity.
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)
INSTRUCTION MANUAL. MZ-505C
5.3 Fuse replacement
Figure 8.- Battery replacement
The meter can self-detect if its input protective fuse is either
open or damaged. In this case, the LCD will display the symbol
FUSE" and an audible beep will sounds continuously, warning the
"
user to replace the damaged fuse to maintain the instrument
operating. While replacing the fuse, the power of the meter must be
completely shut off.
1. Loosen screw with suitable screwdriver and remove battery
cover as figure 10.
2. Loosen screws with suitable screwdriver and remove bottom
cover as figure 11.
3. Replace the damaged fuse with specified one.
FUSE TYPE SHOULD BE 5 x 20 mm. and:
0.1 A F 250 V
AVOIDING THESE DIRECTIONS COULD DAMAGE THE EQUIPMENT
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INSTRUCTION MANUAL. MZ-505C
Figure 9.- Fuse replacement.
5.4 Cleaning recommendations
To clean the cover, take care the instrument is disconnected
Do not use scented hydrocarbons or chlorized solvents. Such
products may attack the plastics used in the construction of the
cover.
The cover should be cleaned by means of a light solution of
detergent and water applied with a soft cloth.
Dry thoroughly before using the system again.
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CAUTION
CAUTION
INSTRUCTION MANUAL. MZ-505C
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