Hioki 3174 AC Automatic Insulation/Withstanding Tester

Output voltage: 0.2 to 5 kV AC (50/60 Hz), Single range output
Measurement category ? , Anticipated transient overvoltage 1500 V

Output frequency: 50/60 Hz, ?0.2%

Voltage output method: PWM switching (0 V start, Voltage change during supply possible)

Voltage setting method: Digital setting, Setting resolution: 0.01 kV

Output voltage accuracy: ?1.5% of the setting value ?20 V

Maximum rated power: 100 VA AC (5 kV/20 mA), continuous

Transformer capacity: 100 VA

Output waveform: Sine wave

Fluctuation rate: 15% or less (At Maximum rated load ? no load converge to set value within 1 second)

Distortion rate: 5% or less (At 40 MO, load 5 kV output: impedance of measuring device during measurement)

Voltage measurement: True RMS indication
Digital meter, 0 to 5.00 kVrms AC Withstand-voltage, Accuracy ?1.5%rdg (?15 V for less than 1000 V)

Current measurement range: 0.01 mA to 20 mA (2-range structure)

Designated value: True RMS indication

Measurement range: 10 mA/20 mA

Measured area and resolution: 0.00 mA to 9.99 mA, 0.01 mA (10-mA range)
0.0 mA to 20.0 mA, 0.1 mA (20-mA range)

Measurement accuracy: ?2%rdg ?0.05 mA (10-mA range)
?2%rdg ?0.5 mA (20-mA range)

Decision Function
Decision method: Window comparator method (digital setting) for setting upper-limit and lowerlimit values

Decision contents: UPPER FAIL : when measured current exceeds the upper-limit setting
PASS : when measured current remains between the upper- / lower limit settings for set time
LOWER FAIL : when the measured current is below the lower-limit setting
UPPER LOWER FAIL : Test errors such as when there is no pre-set voltage out-put

Decision process: Output to the display, beeper sound, signals to EXT I/O for each decision result

Setting range: AC: 0.1 to 20.0 mA (Upper-limit value), 0.1 to 19.9 mA (Lower-limit value), Setting resolution: 0.1 mA

Rated supply: 500 V/1000 V DC (positive electrode)

No load voltage: 1 to 1.2 times of rated voltage

Voltage measurement: Digital meter, 0 to 1000 V DC Insulation resistance, Accuracy ?30 V

Rated measurement current: 1 to 1.2 mA

Short-circuit current: 4 to 5 mA (500 V), 2 to 3 mA (1000 V)

Measurement range: 0.2 M to 2000 MO (500 V), 0.5 M to 2000 MO (1000 V)

Accuracy guarantee: 0.5 M to 999 MO (500 V), 1 MO to 999 MO (1000 V): ?4%rdg 1000 MO to 2000 MO: ?8%rd

Measured resolution: 0.01 MO (0.20 MO to 19.99 MO)
0.1 MO (20.0 MO to 199.9 MO)
1 MO (200 MO to 2000 MO)

Measurement resistance range: 2 MO, 20 MO, 200 MO, 2000 MO (500 V)
4 MO, 40 MO, 400 MO, 2000 MO (1000 V)

Decision method: Window comparator method (digital setting)

Decision contents: UPPER FAIL : When measured resistance exceeds the upper-limit setting.
PASS : When measured resistance is within the upper-limit and lower- limit settings.
LOWER FAIL : When the measured resistance is below the lower-limit setting
UPPER LOWER FAIL : Test errors such as when voltage is low

Decision process: Output to the display, beeper sound, signals to EXT I/O for each decision result

Setting resolution: 0.01 MO (0.2 to 2.00 MO)
0.1 MO (2.10 to 20.0 MO)
1 MO (21.0 to 200 MO)
10 MO (210 to 2000 MO)

Setting range: 0.3 to 999 s

Operation: At ON Setting : Displays the time that is counted down from the start
At OFF Setting: Displays the time that has elapsed from the start

Setting resolution: 0.1 s: 0.3 to 99.9 s, 1 s: 100 to 999 s

Accuracy: 0.3 to 99.9 s: ?50 ms, 100 to 999 s: ?0.5 s

Setting range: 0.1 to 99.9 s, The ramp-up time and ramp-down time can be set individually.

Operation: Ramp-up : Using ramp-up time from initial voltage to test voltage to increase the output voltage gradually
Ramp-down : Using ramp-down time after test time timer to decrease the output voltage from pre-set voltage to 0 V
Both are displayed as time counted down from the set time.

Setting resolution: 0.1 s

Accuracy: ?50 ms

Delay timer: (Withstand-voltage test)

Setting range: 0.1 to 99.9 s

Setting resolution: 0.1 s

Accuracy: ?50 ms

Power supply: Internal power supply Between ISO_DCV-ISO_COM: 15 V?0.5 V, 100 mA (total)

Signal level: All signals Active LOW

Output signals: Open collector output, (insulated with a photocoupler), All signals Active LOW

Maximum load voltage: 30 V DC

Maximum output current: 100 mA DC/ For 1 signal

Output saturation voltage: 1.5 V DC or less

Signal names: H.V.ON : Generating voltage for output
TEST : Test in progress
PASS : PASS status at Evaluation Function setting
UFAIL : UPPER-FAIL status at Evaluation Function setting
LFAIL : LOWER-FAIL status at Evaluation Function setting
READY : Standby
I_MODE : Insulation-resistance test mode
W_MODE : Withstand-voltage test mode
W_FAIL : Withstand-voltage test failed
I_FAIL : Insulation-resistance test failed
MODE1 : Indicates current mode with MODE2 (W, I, W-I, I-W)
MODE2 : Indicates current mode with MODE1
ISO.DCV : Internal standby insulated power supply 15 V, 0.1 A
ISO.COM : Internal standby insulated power supply connections

Input signals: All Active LOW inputs (insulated with a photocoupler)

Maximum input voltage: 30 V DC

HIGH level voltage: Above 15 V below 30 V DC or open

LOW level voltage: 5 V DC or less (-6 mA typ.)

Signal names: START : Test start
STOP : Test stop
EXT-E : External I/O effective
INT.LOCK : Interlock
MEM0 : Memory Selection 0
MEM1 : Memory Selection 1
MEM2 : Memory Selection 2
MEM3 : Memory Selection 3
MEM_E : Memory Enable
Note: Load starts when memory number is selected from MEM0 to 3 and MEM_E is set to L.

Input signal (contact input): START, STOP, SW.EN (External Switch Terminal valid)

Output signal: LED light signal (40 mA max. load current)

Priority placings for Key input: RS-232C Remote control box EXT I/O Front panel of the 3174 (3174- 01) (When START setting is valid with RS-232C) (Only START. STOP, Interlock are valid and all have the same level of priority regardless of the condition of EXT_E))

Synchronization method: Start-stop synchronization, full duplex

Transfer rate: 9600 bps/ 19200 bps

Data length: 8 bits

Stop bit: 1bit

Hand shake: No X flow, hardware flow control

Delimiter: Receiving : CR, CR+LF
Transmitting : CR+LF

Command structure: Reference standard: IEEE 488.2-1987 (3174-01)

Memory function: This function allows test conditions to be saved.

Memory contents: Withstand-voltage test mode test-voltage type (AC50/60 Hz), test-voltage, upper (lower)-limit current evaluation values, test-time, ramp-up (down) time, initial voltage for ramp-up, upper (lower)-limit for Contact Check voltage (Both upper-limit and lower-limit values can be set)
Insulation resistance test mode test-voltage, upper (lower)-limit resistance evaluation values, test-time, delay time, upper (lower)-limit for Contact Check voltage

Memory space: 8 sets each for withstand and insulation (save, load possible)

Pass hold function: Enable this function to hold the Pass state when detected, to facilitate confirmation.

Fail hold function: Enable this function to hold the Fail state when detected, to facilitate confirmation.

Hold function: Maintains the measurement value obtained at the end of a test

Buzzer settings: Buzzer volume settings for test screening and errors (buzzer volume settings are to be performed for PASS and FAIL separately)

Momentary output: This function allows voltage output only when the START key is pressed.

Double action: Enable this function to allow testing to start only when the START key is pressed within about 0.5 seconds after the STOP key.

Fail mode: Enable this function to restrict hold release to the STOP key on the main unit.

PC command “START”: This function validates or invalidates START from RS-232C or GP-IB.

Interlock function: ON/OFF setting for interlock function restricting test start conditions

Maximum output voltage settings: To set the upper-limit for the output voltage (common to withstand-voltage mode and insulation-resistance mode)

Insulation-resistance range: Sets fixed range/ auto range

Insulation-resistance test termination mode: Enable this mode to terminate an insulation-resistance test when the set time of the timer has elapsed (unrelated to screening), or to terminate the test at PASS or FAIL screening.

PC interface settings: To select an interface from among RS-232C (9,600 bps), RS-232C (19,200 bps), and GP-IB. When GP-IB is selected, address (0 to 30) is to be set.

START protection function: Makes START invalid when electricity is discharged at the end of respective tests

TEST signal restriction: ON/OFF test signal output for external I/O while test time or while ramp-up and ramp-down time

Evaluation output in forced stop: Carries out test evaluation when STOP key is pressed after test has been forcibly terminated.

Continuous testing in FAIL status: Test continues as long as it is within the measurement range (for withstandvoltage and insulation-resistance) even when FAIL is shown

Initial ramp-up value: Sets the initial ramp-up value (Setting range: 0.0 to 1.0, Resolution: 0.1, Minimum: 0.1 kV)

Memory function: This function allows test conditions to be saved.

Memory contents: Withstand-voltage test mode test-voltage type (AC50/60 Hz), test-voltage, upper (lower)-limit current evaluation values, test-time, ramp-up (down) time, initial voltage for ramp-up, upper (lower)-limit for Contact Check voltage (Both upper-limit and lower-limit values can be set)
Insulation resistance test mode test-voltage, upper (lower)-limit resistance evaluation values, test-time, delay time, upper (lower)-limit for Contact Check voltage

Memory space: 8 sets each for withstand and insulation (save, load possible)

Pass hold function: Enable this function to hold the Pass state when detected, to facilitate confirmation.

Fail hold function: Enable this function to hold the Fail state when detected, to facilitate confirmation.

Hold function: Maintains the measurement value obtained at the end of a test

Buzzer settings: Buzzer volume settings for test screening and errors (buzzer volume settings are to be performed for PASS and FAIL separately)

Momentary output: This function allows voltage output only when the START key is pressed.

Double action: Enable this function to allow testing to start only when the START key is pressed within about 0.5 seconds after the STOP key.

Fail mode: Enable this function to restrict hold release to the STOP key on the main unit.

PC command “START”: This function validates or invalidates START from RS-232C or GP-IB.

Interlock function: ON/OFF setting for interlock function restricting test start conditions

Maximum output voltage settings: To set the upper-limit for the output voltage (common to withstand-voltage mode and insulation-resistance mode)

Insulation-resistance range: Sets fixed range/ auto range

Insulation-resistance test termination mode: Enable this mode to terminate an insulation-resistance test when the set time of the timer has elapsed (unrelated to screening), or to terminate the test at PASS or FAIL screening.

PC interface settings: To select an interface from among RS-232C (9,600 bps), RS-232C (19,200 bps), and GP-IB. When GP-IB is selected, address (0 to 30) is to be set.

START protection function: Makes START invalid when electricity is discharged at the end of respective tests

TEST signal restriction: ON/OFF test signal output for external I/O while test time or while ramp-up and ramp-down time

Evaluation output in forced stop: Carries out test evaluation when STOP key is pressed after test has been forcibly terminated.

Continuous testing in FAIL status: Test continues as long as it is within the measurement range (for withstandvoltage and insulation-resistance) even when FAIL is shown

Initial ramp-up value: Sets the initial ramp-up value (Setting range: 0.0 to 1.0, Resolution: 0.1, Minimum: 0.1 kV)

Contact check: Makes the Contact Check function valid (no increase in tact time)
LOW side : if no electric current is detected during checks, a result of no connection will appear
HIGH side : upper-limit and lower-limit detection voltages used in checks can be set When the Contact Check measurement voltage is higher than the upper-limit value, or when it is smaller than the lower-limit value, a result of power breakage will appear
Withstand test: voltage setting range 0.20 kV to 5.0 kV, 0.01 kV Resolution (common to both the upper and lower limits)
Insulation-resistance measurement:
500 V; Upper Limit 600 V, Lower Limit 500 V
1000 V; Upper Limit 1200 V, Lower Limit 1000 V (Fixed in all cases)

Accuracy of Voltmeter for Contact Check: Detection method : Detection of average value and conversion to executable value
Accuracy : Set value ?50 V
Note: When the waveform is distorted, the error margin may become bigger.

Key-lock function: Ignores key inputs when set to Key Lock

Status Out: Pre-set contact output in the Optional Function Screen
Maximum input voltage: 150 V AC, 30 V DC
Maximum contact current: 0.5 A
Insulation method: Mechanical Contact Relay
Output conditions
1 H.V.ON
2 TEST
3 PASS
4 FAIL
5 INT.LOCK
6 READY
7 EXT.CONT
8 POWER-ON
Note: ON output for rear panel relay contact with OR for respective valid conditions