IM MY40-02EN <P 2>
<Deleting data>
Data saved can be collectively deleted.
(1) Turn the function switch from power-off to the continuity test position (Clr) while
pressing and holding the
key (MEM).
(2) “MEM” and “CLr” appear.
(3) Press the
key (MEM). “CLr” starts flashing.
(4) Press the
key (MEM) again while “CLr” is flashing.
The buzzer sounds and all data are deleted (do not change the position of
the function dial for two seconds when “CLr” is displayed).
The tester changes its mode to measurement of conductor resistances.
NOTE
To stop deleting of data:
Do not perform any key operation and wait for 10 seconds while
the “CLr” indication mentioned in step (3) is flashing; or
Turn the function switch to another rating.
<Turning off the memory feature>
Turn the function switch to the off position.
14.8 Comparator
When a measured insulation resistance is less than the reference value setting,
the
mark appears and the buzzer sounds. Also the measured value is
automatically held for 5 seconds.
<Selecting the reference value>
Select from three preset values for each rating.
Default values: no.01: 0.1 MΩ/ no.02: 0.2 MΩ/ no.03: 0.4 MΩ
(1) Turn the function switch to a measurement rating.
(2) Press the
key.
(3) “
”appears and the reference value appears on the subdisplay.
(4) Pressing the
key (Select) changes the reference value display as follows.
0.1 MΩ → 0.2 MΩ → 0.4 MΩ → Comparator off (no display)
The reference value currently displayed is selected as the comparator setting.
<Setting the preset values>
Main display
Sub-display
Position of decimal point
Measured
value
Reference
value
Reference
value
no.
Maine
display
Sub-
display
Comparator setting
Insulation resistance
measurement
(with comparator)
<Setting the preset values>
Each of the default preset values no.01 to no.03 can be changed independently.
(1) Turn the function switch from power-off to a desired rating while pressing and
holding the
key. “no.01” on the sub-display flashes.
Press the
key (Select) to select no.02 or no.03.
(2) Confirm the setting no. with the
key (Enter).
The reference value on the main display can be set.
(3) Select the position of the decimal point with the
key (Select).
(4) Confirm the decimal point with the
key (Enter).
(5) Select the number for each digit sequentially.
Pressing the
key (Select) changes the number as follows.
0 → 1 → 2 ··· 8 → 9 → 0
(6) Confirm the number with the
key (Enter).
(7) Set the number for the next digit.
(8) When settings for all the digits are complete,
the reference value starts flashing.
(9) Confirm the reference value with the
key (Enter).
The buzzer sounds and the setting ends.
The tester changes its mode to measurement of insulation resistances.
Repeat steps (1) to (9) to change other preset values.
NOTE
• To cancel the preset setting
Pressing the
key (Select) in step (8) returns the setting procedure to step (1).
To stop the setting, turn the function switch to the off position.
• To set the preset values for another rating
Turn the function dial to the desired rating (insulation resistance) in step (8).
15. Corrective Measures in Case of Failure
If the instrument does not operate properly after taking the corrective measures shown
below or any other failure that is not covered here occurs, contact the vendor from which
you purchased the instrument.
Failures
• The tester displays nothing after turning the function switch to the on position.
• The display is light in color.
• The measured values are erroneous.
Items to Check
• The batteries are installed properly and their power levels are not low.
• The measuring probes are connected correctly and are not damaged.
• Whether the failure reoccurs after turning off the power and retrying the operation.
Error Messages
Err.0
An internal operation failure.
Turn off the power and retry the operation.
* If the failure reoccurs, the tester needs repairing.
Err.1
Cannot save the comparator or memory settings.
Measurement functions other than the comparator and
memory functions operate normally.
Settings and data saved without the error indication (Err.1) can be used.
* If the failure reoccurs, the tester needs repairing.
Err.2
An internal operation failure.
Turn off the power and retry the operation.
* If the failure reoccurs, the tester needs repairing.
13. Measuring Conductor Resistance (Continuity)
The tester can measure the conductor resistance of 0 to 400 Ω.
The buzzer beeps for resistances approximately 40 Ω or lower.
WARNING
Turn off the power to the measured object before connecting or
measuring conductor resistance.
13.1 Setting the Function Switch
Turn the function switch to a conductor resistance measurement (
) position.
13.2 Connecting the Earth Probe
Securely connect the earth probe to the measured object.
13.3 Connecting the Line Probe
Bring the line probe into contact with the measured object.
The display indicates the resistance of the measured object.
NOTE
You do not have to press the MEAS key when you measure conductor resistances.
14. Additional Features
14.1 Double-action 1000-V Function
The tester is equipped with the RELEASE button to protect the measured circuit from
damage due to inadvertent measurement at 1000 V.
To select the 1000 V rating, turn the function switch to the position
while pressing this button.
To cancel the 1000 V rating, turn the function switch to the off position or
another rating position.
14.2 Live-line Alarm
Always turn off the power to the measured object before connecting or measuring
insulation resistance. If an AC voltage of more than 40 V is applied,
the ALARM LED flashes and the buzzer beeps.
In this case, stop the measurement immediately and check the power supply voltage.
14.3 Locking the MEAS Key (for Continuous Measurement)
The MEAS key, when pulled up to the right, can be locked to ensure the key remains
turned on. Use this mechanism when making continuous measurement over
a prolonged period.
Note, however, that leaving the key turned on for an unreasonably long time will
accelerate the discharge of the batteries.
14.4 HOLD Feature
Measured insulation resistances are automatically held for approximately
five seconds. Turning off the MEAS key initiates holding.
14.5 Auto Power-off
The tester is automatically turned off when no key operations are performed
for 10 minutes.
The buzzer sounds 9 and a half minutes after the last key operation (at 1-sec intervals).
If any measurement or key operation is not made while the buzzer sounds,
the tester is turned off. However, it is not turned off when measurement is in
progress or an alarm occurs.
To use the tester after the auto power-off is triggered,
press the
key or the
key, or turn the function switch to the off
position once before proceeding with the desired operation.
14.6 LIGHT and COMP Keys
The
key is used as the Select key for settings and storage numbers of
the comparator and memory functions.
The
key is used as the Enter key for settings and storage numbers of
the comparator and memory functions.
Pressing the Enter key while the display is flashing, confirms selection of
the setting or the storage numbers.
<When setting the memory or comparator function>
Turn the function switch to an insulation resistance rating position while
pressing and holding the
key or the
key until all the displayed
digits stop flashing and remain on, and the buzzer sounds.
Or position the function switch to a rating of the insulation resistance first,
press the
key or the
key when all the digits appear,
and hold the key until the buzzer sounds.
<Backlight>
• The backlight remains off while the comparator is set.
• The backlight is lit when memory is in use.
14.7 Memory Feature (Data Saving)
Up to 20 measured values of the insulation resistance for each rating can be
saved to memory.
<Displaying data>
(1) Turn the function switch from power-off to a measurement rating
while
pressing and holding the
key (MEM).
“MEM” appears and “no.01” (storage number) flashes on the sub-display.
(2) Select a storage number.
Press the
key (Select) to select a storage number (no.01 to no.20).
If an insulation resistance data is saved with the selected (displayed) number,
the insulation resistance value is displayed.
If any data is not saved with the selected (displayed) number, “----” is displayed.
<Saving data>
First select a storage number as in steps (1) and (2) above.
Overwriting data is possible.
(3) Perform measurement with the
key.
(4) Turn off the
key.
The measured value is held and starts flashing.
Press the
key (Enter) while the measured value is flashing to save
it to memory (it is held for five seconds in which time the next data cannot be saved).
NOTE
If the data being held is invalid, “----” is displayed and it cannot be saved.
In this case, perform measurement again and save the data.
