380385

更新时间:2025-07-12 09:04:29
品牌:EXTECH
描述:10KV Digital High Voltage Insulation Tester

380385 概述

10KV Digital High Voltage Insulation Tester 10KV数字高压绝缘电阻测试仪

380385 数据手册

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User's Manual  
10KV Digital High Voltage Insulation Tester  
Model 380385  
Warranty  
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects  
in parts and workmanship for one year from date of shipment (a six month limited  
warranty applies on sensors and cables). If it should become necessary to return the  
instrument for service during or beyond the warranty period, contact the Customer  
Service Department at (781) 890-7440 ext. 210 for authorization or visit our website at  
www.extech.com (click on Contact Extech and go to Service Department to request an  
RA number). A Return Authorization (RA) number must be issued before any product is  
returned to Extech. The sender is responsible for shipping charges, freight, insurance  
and proper packaging to prevent damage in transit. This warranty does not apply to  
defects resulting from action of the user such as misuse, improper wiring, operation  
outside of specification, improper maintenance or repair, or unauthorized modification.  
Extech specifically disclaims any implied warranties or merchantability or fitness for a  
specific purpose and will not be liable for any direct, indirect, incidental or consequential  
damages. Extech's total liability is limited to repair or replacement of the product. The  
warranty set forth above is inclusive and no other warranty, whether written or oral, is  
expressed or implied.  
Introduction  
Congratulations on your purchase of the Extech High Voltage Insulation Tester. This  
device has four pre-set voltage test ranges (up to 10kV) and measures insulation  
resistance to 500G. Other voltage test values can be selected using the ±500V step  
buttons. This professional meter, with proper care, will provide years of safe reliable  
service.  
Safety  
1. Circuits under test must be de-energized and isolated before connections are made.  
2. Circuit connections must not be touched during a test.  
3. After insulation tests, capacitors must be discharged.  
4. Test leads (including alligator clips) must be in good working order, clean and without  
broken or cracked insulation.  
5. When servicing, use only specified replacement parts.  
6. Environmental conditions:  
Indoor use only; Installation category III 300V  
Pollution degree 2  
Altitude up to 2000 meters  
Relative Humidity 80% max.; Temperature 0 to 40oC  
International Safety Symbols  
Caution, refer to this manual before using this meter  
Dangerous Voltages; risk of electric shock  
Meter is protected throughout by double or reinforced insulation  
2
380385 V1.5 3/04  
Specifications  
General specifications  
Display  
2 x 20 character alphanumeric multi-function dot matrix  
Range selection  
20 ranges in 500V steps with automatic ranging.  
Preset buttons for 1KV, 2.5KV, 5KV, and 10KV  
Bargraph  
Displays voltage ramp, soak, and decay  
Automatic discharge  
Low battery indicator  
Power source  
After automatic & manual stop or upon completion of test  
"Replace battery" displayed when battery voltage is low  
Eight 1.5V ‘C’ cells; Battery life 40 hrs (no load at 10kV)  
After 5 minutes of inactivity  
Auto Power off  
EnersaveTM mode  
Test Leads  
Shorter test time to conserve battery life  
Supplied. RED (length = 108”) with GREEN guard lead.  
BLACK lead is 42”.  
Operating conditions  
Storage conditions  
Dimensions  
32 to 104oF (0 to 40oC); < 80% RH  
14 to 140oF (-10 to 60oC); < 80% RH  
13 x 10.2 x 6.3” (330 x 260 x 160mm)  
7.9 lbs (3.6kg)  
Weight  
Range Specifications  
DC Test  
Voltages  
Resistance  
Ranges (in G)  
Short Circuit  
Current  
Accuracy  
Resolution  
0.5KV  
1KV  
25  
50  
100mA  
1.5KV  
2KV  
75  
100  
125  
150  
175  
200  
225  
250  
275  
300  
325  
350  
375  
400  
425  
450  
475  
500  
2.5KV  
3KV  
120mA  
3.5KV  
4KV  
4.5KV  
5KV  
± (3% + 2d)  
1MΩ  
5.5KV  
6KV  
6.5KV  
7KV  
170mA  
360mA  
7.5V  
8KV  
8.5KV  
9KV  
9.5KV  
10KV  
Note: Voltage Regulation is +20% -5% unless current limited.  
380385 V1.5 3/04  
3
Meter Description  
1. Test lead jacks  
2. Dot Matrix Display  
3. Keypad  
1
2
4. Battery compartment (on bottom)  
5. Test lead compartment latch  
5
3
4
Preparation  
Warning: Ensure that the circuit under test does not include devices or components that  
can be damaged by 10KVDC; such devices include power factor correction capacitors, low  
voltage mineral insulated cables, electronic light dimmers, ballasts and starters for  
fluorescent lamps.  
Connecting the Test Leads to the meter  
The Black (Earth), Red (Line), and Green (Guard) test leads connect to the meter  
directly above the dot matrix display (the meter jacks are color coded). NOTE: The Green  
(Guard) lead is attached to the Red lead and should be used (refer to applications section  
next).  
Connecting the Test Leads to the device under test  
The Black (Earth) lead is connected to the conductive material. The Red (Line) and  
Green (Guard) leads are connected to insulating, sheathing, and covering material as  
shown in the following applications section.  
4
380385 V1.5 3/04  
Operation  
Powering the meter  
Press the ON button to turn the unit on. Press the OFF button to turn the unit off.  
Insulation Resistance Measurements  
Warning: The circuit under test must be completely de-energized and isolated before  
making test connections.  
1. After turning the unit on, the display will prompt the user  
Select Voltage:  
250000MV = 5000V  
to select a test voltage (diagram at right).  
2. Select the test voltage by pressing one of the preset  
voltage buttons (1KV, 2.5KV, 5KV, 10KV) or by pressing the Voltage Adjust buttons  
(500+, 500-) to step through the available test voltages in 500V steps.  
3. The resistance range for the selected voltage is indicated on the dot matrix display as  
shown above.  
4. Press the TEST START / STOP button again.  
5. The display will prompt the user to connect the leads.  
Connect Leads . . . .  
. . . . . . Press TEST  
Press the TEST START/STOP button to start testing.  
6. The elapsed test time appears on the upper line (right  
hand side) of the display. The resistance reading is shown on the upper left hand side  
of the display. The lower line shows the test voltage in bargraph format (see diagram  
at right).  
R=9.998MΩ  
0> █████ <500V  
6.8s  
7. The HOLD icon will appear in place of the bargraph  
when the test is complete and the voltage has been  
discharged.  
WARNING: DO NOT REMOVE THE TEST LEADS BEFORE THE HOLD DISPLAY  
APPEARS.  
8. The meter automatically discharges the system at the end of the test.  
9. The meter automatically powers down after 5 minutes.  
The EnersaveTM Mode  
EnersaveTM mode conserves battery life by performing a relatively short test (10 seconds).  
The EnersaveTM mode is the default test mode. To bypass this mode and run a longer test  
(100 seconds max), press and hold the TEST button for 3 seconds when starting a test.  
Bargraph Voltage Display  
The bargraph represents the voltage present on the test leads as it rises, soaks, and  
decays. The bargraph appears on the lower left of the dot matrix display during a test.  
Automatic Under/Over Range Resistance Detect  
If the display shows the message “LOW M”, the test should be interrupted immediately  
by pressing the TEST button. This message indicates that the insulation under test has  
broken down and the meter is trying to inject a high potential onto a short circuit. If ‘HIGH’  
appears, it is likely that the test configuration is open. Check the test set-up then test  
again.  
Elapsed Timer  
The test duration is indicated on the display. This is particularly useful in determining  
whether an insulating material under test will break down in a given amount of time.  
5
380385 V1.5 3/04  
Manual Test STOP  
To stop a test in progress, press the TEST button. The test will immediately end and the  
system will automatically discharge.  
Automatic Test STOP  
When in the default EnersaveTM mode, the test automatically stops after approx. 10  
seconds. The test automatically stops after approx. 100 seconds if the meter is not in the  
EnersaveTM mode.  
Live Circuit Warning  
If the test leads are connected to a live circuit (approx. 500V), a warning beeper will sound  
and the meter will display “Live Warning…Circuit Live…”. In this case, correct the problem  
and retest.  
Automatic Discharge  
At the end of a test, the meter automatically discharges the high voltage. The automatic  
discharge status is reflected on the display. During discharge the beeper will sound and,  
when completely discharged, the HOLD icon appears on the display.  
Applications  
Measuring Power Tools and Small Appliances  
For small appliances, connect the Black (EARTH) lead to conductors and the Red (LINE)  
lead to insulating material.  
For single or double insulated power tools, one lead should be connected to the device’s  
chuck, blade, etc. and the other lead to one of the AC power cord conductors (test both  
conductors in turn). Refer to the power tool application diagram below.  
AC  
Plug  
For 2 or 3 prong plugs, connect the  
RED lead to one conductor at a time  
Connect the BLACK  
lead to the chuck  
Testing Motors  
AC Motors  
Connect BLACK lead  
to the motor leads  
Disconnect the motor from the line by:  
a. Disconnecting the wires from the  
motor terminals or  
Connect RED lead  
b. Opening the main switch  
to grounded housing  
If the main switch is opened, and the  
motor also has a motor-starter, then  
the starter must be held in the ON position. With the main switch opened, the measured  
resistance will include the resistance of the motor wire and all other components between  
the motor and the main switch. If a weakness is indicated, the motor and other  
components should be checked individually. If the motor is disconnected at the motor  
terminals, connect the RED lead to the grounded motor housing and the BLACK lead to  
one of the motor leads.  
6
380385 V1.5 3/04  
DC Motors  
1. Disconnect the motor from the line.  
2. To test the brush rigging, field coils and armature, connect the RED lead to the  
grounded motor housing and the BLACK lead to the brush on the commutator.  
3. If the resistance measurement indicates a weakness, raise the brushes off of the  
commutator and separately test the armature, field coils and brush rigging by  
connecting one lead to each individually, leaving the other connected to the grounded  
motor housing. This also applies to DC Generators.  
Core  
Insulation Sheath Covering  
Testing Single Conductor Cables  
1. Completely disconnect the cable  
under test from its source and  
destination.  
2. Connect the test leads to the  
cable as shown at right.  
EARTH  
GUARD LINE  
Testing Multi Conductor Cables  
1. Completely disconnect the cable under test from its source and destination.  
2. Refer to the diagrams below for three possible tests.  
GUARD  
EARTH  
EARTH  
LINE  
LINE  
GUARD  
EARTH  
LINE  
Testing one conductor  
to earth  
One conductor to all  
minus ground  
Testing one conductor to  
all of the conductors  
Transformer Testing  
Transformer tests are performed with the transformer completely disconnected from the  
line and the load. Note that the case ground should not be removed.  
The five tests listed below will completely test a single-phase transformer. Note that at  
least  
1 minute should be allowed  
between each test.  
1. High voltage winding to low voltage  
winding and ground  
2. Low voltage winding to high  
voltage winding and ground  
Connect the  
BLACK lead here  
Connect the  
RED lead here  
3. High voltage winding to low voltage  
winding (pictured at right)  
4. High voltage winding to ground  
5. Low voltage winding to ground  
7
380385 V1.5 3/04  
Maintenance  
Battery Replacement  
When ‘REPLACE BATTERY’ appears on the display, replace the eight 1.5V ‘C’ batteries.  
1. Ensure that the meter is powered down and that the test leads are not connected  
2. Close the instrument cover and turn the instrument upside down  
3. Remove the screw located on the bottom of the meter  
4. Remove the battery compartment cover  
5. Replace the eight batteries ensuring proper polarity  
6. Affix the rear cover and secure the rear screw  
Cleaning  
Periodically wipe the case with a dry cloth. Do not use solvents or abrasives to clean this  
instrument.  
Repair and Calibration  
Extech offers complete repair and calibration services for all of the products we sell. For  
periodic calibration, NIST certification or repair of any Extech product, call customer  
service for details on services available. Extech recommends that calibration be performed  
on an annual basis to insure calibration integrity.  
Support Hotline (781) 890-7440  
Tech support: Ext. 200; Email: support@extech.com  
Repair/Returns: Ext. 210; Email: repair@extech.com  
Website: www.extech.com  
Copyright © 2002 Extech Instruments Corporation. All rights reserved  
including the right of reproduction in whole or in part in any form.  
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380385 V1.5 3/04  

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