The Basic Feature
l   4-range Hight voltage insulation resistance test：
Ø  3123：250V、500V、1000V 、2500V
Ø  3125：500V、1000V、2500V 、5000 V
l   DC/AC Voltage measurement：
DC：00～±1000V  AC：30～600V（50/60Hz）
l   Liquid crystal display(Max. 9999 counts)，36 sect bar graph to display
l   Sample rate：apptox.0.5 ～5 times/sec
l   Hight voltage insulation resistance test Auto-ranging
l   PI（Polarization Index）、DAR（Induction absorption ratio）can be measured by the automatic measurement function
l   Continuous measurementfunction
l   With Timer measurement function
l   Automatic Electric discharge function
l   Stepping voltage test、temperature measurement、Leakage current display
l   The actual output voltage value and the survey insulation resistance value are displayed at the same time
l   Built-in real-time clock，provide the accurate time to the record and the surveying work
l   Two kind of convenient of operation data record function：Manual record and Work record，and may convenient inquire about data recording
l   Uses the panel calibration technology，without opening the crust can be calibrated
l   Available alkaline battery、Ni-Hi battery or power adapter power supply，the battery compartment cover may convenient the battery replacement
l   Has the automatic backlight closure function and the automatic power source closure function
l   Big screen LCD display，with the white LED backlight
l   The meter can communicate with computer by isolation interface USB，and can be operated by computer
l   The feature of simple man-machine operation、portable and firm suits the field use
Basic Specification  
（Apply within one year after the calibration、23℃±5℃、0～70%RH、Accuracy =±（%reading+LSD））
 
Insulation Resistance tester

3123	√	√	√	√
3125		√	√	√	√
Rated voltage	250V	500V	1000V	2500V	5000V
Measuring Range	0.0～99.9MΩ 100～999MΩ 1.00～2.50GΩ	0.0～99.9MΩ 100～999MΩ 1.00～5.00GΩ	0.0～99.9MΩ 100～999MΩ 1.00～9.99GΩ	0.0～99.9MΩ 100～999MΩ 1.00～9.99GΩ 10.0～99.9GΩ	0.0～99.9MΩ 100～999MΩ 1.00～9.99GΩ 10.0～99.9GΩ 100～1000GΩ 1.00～1.20TΩ
Open circuit Voltage	DC 250V + 20% ，-0%	DC 500V + 20% ，-0%	DC 1000V + 20%，-0%	DC 2500V + 20%，-0%	DC 5000V +20%，-0%
Rated Current	1mA--1.2mA (at 0.21MΩ load)	1mA--1.2mA (at 0.5MΩ load)	1mA--1.2mA (at 1MΩ load)	1mA--1.2mA (at 2.5MΩ load)	1mA—1.2mA (at 5MΩ load)
Short-circuit Current	Approx. 1.3mA
Accuracy	±5%rdg ± 3dgt / ±20%(100GΩ or more)

Voltage monitor display for insulation resistance range
0～5000V(resolution 1V)：±2%rdg±3dgt
 
Leakage current measurement
 

CurrentRange	Measuring Range	Accuracy
5uA	0.000～5.250uA	±10%rdg±5dgt
50uA	5.00～52.50uA	±2.5%rdg±5dgt
250uA	50.0～262.5uA	±2.5%rdg±5dgt
1500uA	250～1500uA	±2.5%rdg±5dgt

Voltage measurement

	DC voltage	AC voltage
Measuring range	0～±1000V	30 ～600V(50/60Hz)
Resolution	1V
Accuracy	±2%rdg±3dgt

 
 Temperaturemeasurement

Measuring range	Accuracy
0.0～25.0ºC	±1ºC
25.0～70.0ºC	±2.ºC

General
l   Operating temperature & humidity range：
0ºC ~ 40ºC/Relative humidity 85% or less(no condensation)
l   Storage temperature & humidity range：
-20ºC ~ +60ºC/Relative humidity 90% or less(no condensation)
l   Operable altitude：
2000m or less（used to indoor）
l   Rated Transient Overvoltage
6KV（1.2*50us）CATⅠ, CAI Ⅱ, CAT  Ⅲ peak  measurement
l   Insulation resistance & Withstand voltage：
1000MΩor more /DC1000V  (Between electrical circuit and enclosure)
    AC8320V(50/60Hz)/5sec.  (Between electrical circuit and enclosure)
l   shake & impact:：
Randomicity 2g，5~500Hz
1 meter drops the test
l   Calibrating period & Preheat interval：
In order to guarantee that this meter precision, its calibrating period is one year or other
Starting preheat interval is 10 minutes or other
 
l   Display & Backlight：
Sect style LCD double display：63.7×104.7mm
White LED backlight,  may setup backlight time 0~3600sec
l   Power Source：
 DC12V：Alkaline battery size C(LR14) × 8pcs
DC12V：Ni-Hi battery size C(R14) × 8pcs
            the external DC12V adapter
l   Auto-power-off：
may setup Auto-power-off time 0~60minutes
l   Dimensions & Weight：
210 × 155 × 95（mm），approx. 1300g(barring battery)
l   Accessories：
 A set of test leads
Alkaline size C battery (LR14) × 8pcs
            Instruction manual
 Hard Case
12V adapter for recorder