HDT20A HDT20B
Insulation Resistance Tester User's Manual
Safety Rules
Safety Warning
The design、manufacture and test are all up to the safety
standard IEC61010(safety demand of the electronic products), this
manual includes the safe using of the instrument and the safety
state of instrument, the warning and the safety rules that the users
must comply. Please read the manual before use.
Warning
●Please read carefully and understand this manual before using
the instrument.
●Please comply the regulation of the manual all the time, and
keep the manual for consultation.
●When using the instrument for testing, wrong operation can
result in accident and instrument damage.
●The Company reserves the right to modify the instructions, if the
instructions are to change without notice，pls understand.
The symbols on the instrument mean that in order to operate
the instrument safely, the users are supposed to refer to the relating
description in this manual.
Danger is in order to avoid the probably serious or fatal
damage in some state and operation.
Warning is in order to avoid the danger of electric-shocking.
Notice means avoiding the damage to the instrument and
accurate measuring.
Danger
● Please don't take measurement in the flammability place, the
spark maybe result in explosion.
● Please don't operate the instrument if it is wet of the instrument
surface or of the user's hand.
● When testing voltage, it probably result in person injury
because of the short circuit of the metal part and the testing lead.
● Please don't exceed the maximum scope of the allowable range.
● Don't open the battery cover when testing.
● When taking the insulated measurement, please don't touch the
circuitry under test.
Warning
● If there is abnormity from the instrument, please stop using.
For example: the instrument dilapidation or metal part exposure.
● Please don't rotate the Function/Selection switch when the
testing lead is inserted into the instrument and connected to the
circuitry for testing.
● Please don't install any substituting parts to the instrument or
carry on any unauthorized modification, instruments are sent back
to the Hongda Company when maintaining.
● Please don't replace the battery when the instrument is in the
state of humidity.
● Please sure the connection is fastness of all the testing
interfaces between the testing lead and the instrument.
● Please sure the instrument is turned off when opening the
battery cover.
Notice
● Before test, please sure the voltage selector switch is on the
proper location.
● After test, please set the function switch to the range "OFF". If
it is available for a long time, please take out the battery for storage
● Please don't put the instrument in the place of high
temperature、humidity、dew and strong light for a long time.
● Please use the humid cloth or detergent to clean the instrument
case. Don't use the friction material or solvent.
● If the instrument is wet, please make it dry then storage.
Symbol
The probability of electric-shocking
The instrument has double insulation or reinforcing insulation
Important operation(referring to the manual)
1.Preface
1.1 Thanks for use our products, you will get the
comprehensive technology support and service from our company.
1.2This manual is used for HDT20A/HDT20B insulation
resistance tester.
1.3 Before using the product, please read the manual
carefully and keep it well for reference.
1.4 The product is for high-voltage electric equipment tester,
please accord to the manual description to operate. And comply
strictly to the Nation's related regulations. For inappropriate
operation, it will probably result in equipment damage or person
safety danger.
1.5 Please consult our company when there is any question
as you read the manual or use the instrument.
2.Characteristics
2.1 HDT20A HDT20B is a electron controlled minitype
instrument, thereinto, the high voltage insulation resistance tester
has three insulation resistance for voltage test.
2.2 The design is up to the following safety standard:
IEC 1010
89/336/EEC(electromagnetism compatibility, Nov, 1992, EMC)
P73/23/EEC(product safety regulation: Nov, 6
th
, 1979,
low-voltage regulation: Feb,19th, 1973)
2.3 Automatically release voltage function:
2.4 Be used for the insulation resistance of all kinds of
electron equipment and insulation material, such as transformer、
generator、 cable、 switch、 electric equipment and so on. Be used for
the maintenance、test and check of all the series of electric
equipment.
2.5 Rated voltage variable
HDT20A-- Rated voltage can be switched among 250V, 500V,
1000V by knob switch.
HDT20B-- Rated voltage can be switched among 1000V,
2500V by knob switch.
2.6 High voltage indication
There is the LED in the instrument(HV ON) indicating the high
voltage work state.
2.7 Low battery indication.
2.8 Battery drive, removing the operation of hand-cranked
generator.
2.9 3
1
/
2
digital display, reading clearly.
2.10 Th e measurement range for HDT20A is 0.1MΩ～1999M
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