The Hioki electrical safety testers are designed for insulation resistance and voltage withstand testing of electrical devices and components according to various safety standards. Please select and purchase the optional test leads to accommodate your application. The Insulation Tester ST delivers the fastest insulation resistance testing in the industry, meeting all the requirements of production lines thanks to rapid takt times. Testing is complete in as little as 50 ms — the fastest time in the industry.
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Quick Links. Download this manual. Hioki Manual. Table of Contents. Test Equipment Hioki Manual Memory hicorder 16 pages. Page 5 5. Page 6 6. Changes to Specifications Changes are made to software version 1. Page 9: Inspection Use the original packing materials when reshipping the product, if possible. Warranty HIOKI cannot be responsible for losses caused either directly or indirectly by the use of the with other equipment, or if ownership is transferred to a third party.
However, mishandling during use could result in injury or death, as well as damage to the product. Be certain that you understand the instructions and precautions in the manual before use.
Indicates that incorrect operation presents an extreme hazard that could result in serious injury or death to DANGER the user. These are defined as follows. This is usually the maximum value of the currently selected range. Page Notes On Use Using the product under such conditions could result in electrocution. Replace the test probes specified by Hioki. Do not use the product where it may be exposed to corrosive or combustible gases.
The product may be damaged or cause an explosion. To avoid damage, do not use it in a wet or dusty environment. Page Chapter 1 Outline Comparator and timer functions facilitate easy and accurate insulation resistance testing. Page 17 Also restarts with values saved at power shutdown when power is turned on. Additional test conditions can be selected. Records extended insulation resistance fluctuations using analog output.
Sampling lamp Blinks during resistance measurement. Measurement value Displays measured resistance value. Lower limit display Displays comparator lower limit value. Measurement Connect test probes. High voltage occurs terminals between terminals continuously electrically connected to rear panel measurement terminals.
TEST lamp Turns on during testing. Blinks during discharging buildup in tested object. Press to change settings. Rear Connect test probes.
High voltage occurs measurement between terminals. Powering On and Off the Unit See 2. Connecting Cord and Probes See 2. Using Handle See 2. Connecting to Equipment to be tested See 2. Page Connecting Cord And Probes , , 2. Do not keep power on equipment to be tested when connecting probes. When interface cable, etc. After testing is complete, confirm that the TEST lamp is off before disconnecting probe from equipment to be tested.
Setting test voltage See 3. Do not start the test simply by confirming the voltage display lamp, as unexpected voltage may be generated. Lower limit value determines resistance range for setting manual range. Auto range may require some time before measurement value is displayed because range has to shift immediately after testing starts.
Same Test duration setting is applicable at any test voltage. When setting at auto range, if the test time is set at a short time period, there is a possibility that test may finish without displaying a measurement value because of a range shift. When timer indicator is blinking, press both key and key at the same time to display "--" blinking or hold down either key or key to display "--" blinking.
Measurement value is displayed. Same delay time setting is applicable at any test voltage. For details, read 3.
Follow the direction below to confirm delay time. To avoid incorrect FAIL judgment, set delay time. While charging capacitance, time is required for applied voltage to reach test voltage standard value.
Test voltage Discharge time Approx. When measurement value fluctuates, select SLOW for effective reading. Measurement value display decimal position may differ case by case. Each setting display blinks during setting status. Delay time 1. Resistance measurement 2. Delay time countdown 1. Different ways can be used to start and to end testing.
When delay time is set, starts resistance measurement and delay time countdown. For details, see 3. To eliminate time for decimal point to move, switch resistance range to manual range.
Page Completing Testing 3 TEST lamp may not turn off and continue to blink after testing is complete indicating discharging any charge buildup in tested object and the Proceed with discharge by following instruction in 4.
Page Connecting Switched Probe 3 Connect connection cord or another test probe or to the other front panel measurement terminal. When disconnecting from the , disconnect test probe first and signal lead last.
Following indicator appears displaying a number blinking to display save setting. The number identifies test condition setting to be saved.
When save setting display appears, the number displayed is determined as described below. Following indicator appears displaying a number blinking. The number identifies saved test condition setting. All saved test conditions are cleared by system reset. All signal leads are isolated through a photocoupler from other parts.
To perform start up edge detection, it requires more than 60 ms when set to LOW. Locking on LOW does not accept "all test start" Page 64 EXT. Also connects with INT. GND terminal. GND functions. Not isolated. GND terminal is connected with power supply cord ground lead. DCV terminal at 4. DCV terminal, refer to the chart below for external DC power supply to be connected for another direct loading and output signal voltage, output current.
Output voltage External Low level See "6. Recommended Single strand wire 0. Be sure to apply protective grounding to external equipment to be connected to avoid risk of damaging insulation. Maximum photocoupler low level output current is 60 mA. When more than 60 mA current is required, current amplifier transistor circuit and other external power supply devices must be connected externally.
At factory setting, test voltage and comparator VOLT are selected. Factory setting is set to SLOW. Test voltage cannot be changed during testing. COM 60 mA max. When using relay, be sure to install back electromotive force NOTE absorption diode. It is possible to use FET or external switch in stead of transistor.
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