MY40 Digital Insulation Tester
MY40 Digital Insulation Tester
SERIES
쎲 Digital model with 4 voltage/resistance ratings
쎲 Multifunction
Insulation resistance, AC voltage and conductor resistance measurement
Insulation test mode: Comparator, memory, auto-hold and
discharge functions
All test modes:
Live-line alarm (excluding AC voltage
measurement), battery check and automatic power-off
쎲 Easy-to-view, fluctuation-free display
쎲 Double-action safety mechanism
Protection against inadvertent setting of rotary
switch to 1000 V rating
Testing Performance Specifications
Model
Rating
125V/200MΩ
250V/200MΩ
MY40
-01
500V/2000MΩ
1000V/2000MΩ
Range
Option
.4000
4.000
40.00
200.0
.4000
4.000
40.00
200.0
4.000
40.00
400.0
2000
4.000
40.00
400.0
2000
Resolution Measuring Range
.1kΩ
1kΩ
10kΩ
100kΩ
.1kΩ
1kΩ
10kΩ
100kΩ
1kΩ
10kΩ
100kΩ
1MΩ
1kΩ
10kΩ
100kΩ
1MΩ
Tolerance
Lower Limit of Rated Central Scale
measured Ω Current Value
0.125MΩ
1mA 5MΩ
0–.0199MΩ
.0200–10.00MΩ *
10.01–200.0MΩ
± (5%of rdg+6dgt)
± (2%of rdg+6dgt)
± 5%of rdg
0–.0499MΩ
.0500–20.00MΩ *
20.01–200.0MΩ
± (5%of rdg+6dgt)
± (2%of rdg+6dgt)
± 5%of rdg
0.25MΩ
0–0.999MΩ
1.000–500MΩ *
501–2000MΩ
± (5%of rdg+6dgt)
± (2%of rdg+6dgt)
± 5%of rdg
0.5MΩ
± (5%of rdg+6dgt)
± (2%of rdg+6dgt)
± 5%of rdg
2MΩ
0–1.999MΩ
2.000–1000MΩ *
1001–2000MΩ
Standard test conditions
Ambient temperature/humidity ranges: 23 ±5:/45-75% RH
Tolerances under the above-mentioned conditions:
Deviation from zero scale value: 6 digits maximum
Indication of ∞ mark on bar graph: Approx. 4000 MΩ min. (500 V/1000 V)
Approx. 400 MΩ min. (125 V/250 V)
Open circuit voltage: 130% max. of rated voltage
1mA
5MΩ
1mA 50MΩ
Rated measuring current: 1 mA (0 to 20%) when in first effective measuring range
Short-circuit Current: 2 mA max.
AC voltage measurement (45-400 Hz)
Model
Range Resolution
MY40-01 600V
0.5mA 50MΩ
1V
Accuracy
Input Impedance
±(2% of rdg + 6dgt)
Approx. 2 MΩ
Conductor resistance measurement
Model
Range Resolution
MY40-01 400Ω
Accuracy
±(2% of rdg + 8dgt)
0.1Ω
Open-circuit Voltage
Buzzer sound
resistance: <40Ω.
* First effective measuring range; ** The minimum value at which the rated voltage can be maintained
General Specifications
Standard Accessories
Display: 3 1/2-digit LCD; 4000 count; backlight-illuminated; logarithmic
bar graph; extension bar graph–no fluctuations, as the display shows
the digits of a reading in the order in which each digit settles.
Example of Extension Bar Indicator View
The data value is
changing.
Product
Part Number
Qty
Protection cover
93013
1
Shoulder strap
99005
1
Line probe
98001
1
Earth probe
98002
1
User's manual
–
1
Batteries
–
4
The data value is fixed.
External Dimensions
Unit: mm
52.5
125
103
Comparator function:The MY40 alerts you by turning on the LOW
symbol and sounding the buzzer if the measured value is smaller than
the reference value. You can allocate as many as three user-defined
reference values to each rating. The factory-set defaults are 0.1 MΩ,
0.2 MΩ and 0.4 MΩ.
Memory function:For each rating, you can save as many as 20 measurements at desired memory address numbers.
INSULATION
TESTER
LIGHT
Enter
ALARM
1000V
2000MΩ
500V
MEM
250V
MEAS
200MΩ
PULL LOCK
125V
V
600V MAX
Automatic discharge function:The MY40 automatically begins discharge when you turn off the MEAS switch. You can monitor the state
of discharge by checking the bar graph and make sure discharge is
complete by checking that the segment bar disappear.
COMP
Select
OFF
Clr
1000V RELEASE
High-voltage indicators: The high-voltage symbol and LED lamp
come on to alert you when the MY40 is in insulation testing mode or if
any voltage remains to be discharged.
Live-line alarm:If you apply an AC voltage of approximately 40 V or
higher across the input terminals, the MY40 alerts you by blinking the
LED lamp and sounding the buzzer.
Overrange input alarm: If the voltage being measured exceeds 600 V
during AC voltage measurement, the MY40 alerts you by flashing the
Maximum Value indicator and sounding the buzzer.
93013
Protection cover
Auto-hold function: The tester retains the measured resistance for
approximately 5 seconds after the MEAS switch is turned off.
Dimensions: 125 (W) ҂ 103 (H) ҂ 53 (D) (mm), excluding protrusions
Weight: 420 g (main unit and batteries only, excluding accessories)
Batteries: Four AA (R6P) batteries
Note: See the list of accessories on the backside of this bulletin for more information on
accessories.
3
B9108XA
Accessory-housing case
93015
Carrying case
(case for housing both the main
unit and accessories)
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