3157-01--Datasheet/数据表在线中文翻译

1999

3157-01 AC GROUNDING HiTESTER

Electronic Measuring Instrument

CE certified low-resistance measurement compliant with major safety standards

Protective ground tester indispensable for

standard certification

The 3157-01 AC GROUNDING HiTESTER is designed to measure

whether the metal enclosure of an electrical equipment is connected to

the ground terminal at sufficiently low resistance levels. It also can be

used to evaluate the grounding conditions of large-scale electrical

installations. Measurement is carried out by using a high current

according to the specifications of the measurement object, and

determining the voltage drop at the measurement point. Reference

values are as set out in the various safety standards. The 3157-01 can

ISO14001

carry out measurements in accordance with the stipulations of multiple

standards.

JQA-E-90091

http://www.hioki.co.jp/

HIOKI company overview, new products, environmental considerations and

other information are available on our website.

Low-resistance measurements

in accordance with all major

safety standards

Main applications

The 3157-01 passes a large AC current through the

measurement object and measures the voltage drop

according to the AC 4-terminal method, making it

possible to measure very low resistance values.

■ Protective grounding checks of medical and

general electrical equipment

■ Ground connection tracing of machine tools

and wiring panels

■ Safeguard and equal-potential connection

checks of medical installations

■ High-current behavior evaluation of connections

Major features

■ Compliant with a multitude of standards

■■“SOFT START” function

The 3157-01 allows measurement as prescribed by most

major safety standards. Using the 4-terminal method to

measure the voltage drop for a high current, the unit offers

evaluation features and a timer function to allow efficient

standard compliance testing.

The unit checks whether the probe is connected to the

measurement object, and raises the output current to the preset

value when a connection is detected. This serves to prevent

sparks caused by connecting a live probe to a measurement

object, thereby guarding against equipment damage and

ensuring operator safety.

■ Constant-current testing (max. 31.0 A) with

feedback control

■ Fluorescent tube display (VFD)

The display uses an easy to read fluorescent tube. Compared

to conventional meters, the digital indication allows effortless

reading of the data.

The output current is controlled by a feedback loop to achieve

stability, regardless of fluctuations in the load impedance.

■ Test data count function

For installations with many test points, the unit can

automatically count the number of tests, to ensure that no

points are missed.

■ Light weight and compact dimensions

Whereas conventional testing equipment required a trolley for

transport, the 3157-01 can be easily carried with one hand. Its

small dimensions, light weight, and ease of maintenance make

it ideal for use in the field.

[320 (W) × 90 (H) × 263 (D) mm

12.6" (W) × 3.56" (H) × 10.40" (D)

■ Setting value store function

Up to 20 settings can be stored, allowing quick switching

between the various setups for different standards and legal

requirements.

7 kg(247.2 oz)]

Standards supported by the 3157-01

■IEC60950

■IEC60065

[Safety of data processing equipment, including

office equipment]

[Safety requirements for mains operated

electronic and related apparatus for household

and similar general use]

■IEC61010-1

[Safety requirements for measurement, control,

■IEC60204-1

and laboratory electrical equipment]

[Electrical equipment of industrial machines

-Part1,General requirements]

■UL standard

Relevant standards

■IEC60335-1

[Safety of household and similar electrical

(UL 1012, UL 1270, UL 1409, UL 1419, UL 1437,

UL 2601, etc.)

appliances - Part 1, General requirements]

■IEC60601-1

[Medical electrical equipment -Part 1, General

requirements for safety]

A multitude of functions in a compact body

■ Easy standard testing

■ Measurement range

Load resistance [Ω]

Measurement current

Upper limit

Measurement time

Open terminal voltage 6 V line

Preparation

1.8

1.5

Maximum output power 130 VA line

Test condition file number

Remaining time

For 6 A output, 6 V line yields

6(V)

=1.0 [ Ω ]

6(A)

Measurement

1.0

For 25 A output, 130 VA line yields

130 (VA)

25 (A )

PASS

FAIL

=0.208 [ Ω ]

Result

0.5

Measurement range

Measurement value

* If hold is not enabled, unit reverts to READY condition after 1 second.

Output current [ A ]

■ Versatile functions

■■■■ ■ ■■■■ ■ ■ ■ ■■■■■ ■ ■

■ Test data count function (0: Disable/1: Enable)

Allows counting of test points for equipment with many test points.

■ Buzzer setting

(Pressing SHIFT + STOP keys allows the user to make settings for each

function.)

Evaluation

Error

OFF

■ Output current frequency switching (0: 50 Hz / 1: 60 Hz)

■ Enable current control in test condition (0: No/1: Yes)

Allows changing of the output current value while a test is in

progress.

■ PASS/FAIL hold function setting

Determines whether the condition is

■ Momentary out

held after detecting PASS or FAIL.

PASS

FAIL

NO YES NO YES

YES YES NO NO

Enabling this function allows the current to be output only when

the START key is pressed.

0: Disabled (trigger operation)

1: Enabled (momentary out operation)

■ Hold function setting (0: Hold disabled / 1: Hold enabled)

Holds the condition of the unit after the preset test time has elapsed

or after the STOP key is pressed.

■ Test mode

0: Soft start mode

1: Normal mode

■ Use test lower limit setting (0: No / 1: Yes)

2: Continuous test mode

Disabling the setting allows only the upper limit to be set.

Enabling the setting allows also the lower limit to be set.

Print function

0: Not used

■ Timer override (0: No / 1: Yes)

Determines whether a test time can be set. If test time is not set,

the test ends only when the STOP key is pressed or the result is

FAIL.

1: Automatically print PASS/FAIL result

2: Optionally print in PASS/FAIL hold condition

■ External I/O

The unit comes with I/O connectors as standard equipment.

The connectors allow external START/STOP control,

READY/TEST status checking, and PASS/FAIL result

reading. Photocouplers are used to isolate the I/O signals from

the internal circuitry.

9442 printer

■ External interface (option)

Printing method : Thermal serial dot printer

The 9518-02 GP-IB interface or 9593-02 RS-232C interface

can be installed in the unit. This allows remote control from a

computer as well as export of measurement data. The 9593-02

RS-232C interface also allows connection of the 9442 printer

for producing a hard copy of measurement data.

Paper width

Printing speed : 52.5 cps

Power source

: 112 mm

: 9443 AC adapter, or supplied nickel-hydride battery

(Charged through 9443; printing capability approx. 3000 lines with

full charge)

* To use the 9442 printer, an optional 9593-02 RS-232C interface, 9446 connection

cable, and AC adapter are required.

■ 3157-01 Specifications

■ Basic specifications

Voltage monitor

range

: 0 - 6.00 V AC (single range 0.01 V resolution)

: AC 4-terminal method resistance measurement

Basic functions

[ Generator section ]

Current generator : PWM constant current control

Accuracy

Monitoring cycle

: ± (1% rdg.+5 dgt.)

: 0.5 s

principle

Current setting

range

[ Timer section ]

: 3.0 A - 31.0 A AC (0.1 A resolution), into 0.1W load

: Counts down time after start until preset time

Setting ON

Accuracy

Maximum output

power

Open-terminal

voltage

: ± (1% of setting + 0.2 A) within maximum output power range

: 130 VA (at output terminals) *

Setting OFF

Setting range

Setting resolution

Accuracy

: Shows elapsed time after start

: 0.5 - 999 s

: 0.1 s (0.5 - 99.9 s)/ 1 s (100 - 999 s)

: ±50 ms (0.5 - 99.9 s)/±0.5 s (100 - 999 s)

* Subject to derating according to ambient temperature [80% at 40˚C (104˚F)]

: Max. 6 V AC

Generator

frequency

SOFT START

function

: 50 Hz or 60 Hz sine wave (selectable)

[ Other functions ]

Comparator

: PASS/FAIL evaluation using preset upper/lower limit

: Apply current only after checking load connection

function

Comparator result

output

: Internal buzzer (PASS/FAIL, ON/OFF switchable) and

I/O output

[ Monitor section ]

Resistance

measurement

range

Accuracy

Current monitoring

range

Zero-adjust

function

: For measurement probe impedance cancellation

: 0 - 1.800W (0.001W resolution)

Zero-adjust range

Memory function

: 0 - 0.100W

: Max. 20 settings (with save/load)

: ± (2% rdg. +4 dgt.) after zero-adjust

: 0 - 35.0 A AC (0.1 A resolution)

Accuracy

: ± (1% rdg. +5 dgt.) (at 3 A or more)

■General Specifications

Interfaces

: 1. External I/O *

: Fluorescent tube (digital display)

Display

: 0 to +40˚C (32 to 104˚F), 30 to 90% RH (no condensation)

Output signals: PASS /UP FAIL /LOW FAIL /TEST

/READY .... open collector

Ambient conditions

for use

: -10 to +50˚C (14 to 122˚F), 10 to 95% RH (no condensation)

Input signals: START /STOP /External I/O

ENABLE .... 5 - 24 V DC

Ambient conditions

for storage

: 23˚C ± 5˚C (71.3˚F ± 9˚F)

2. Front EXT connector *

Ambient conditions

for assured

accuracy

30 to 90% RH (no condensation)

After 30-minute warmup period

: Indoors, altitude up to 2000 m

External START/STOP input .... contact signal

* When external start/stop connector is used, START key is inactive

3. RS-232C or GP-IB (option; one only)

Remote control, measurement data output

(When RMT indicator is on, operation keys are locked; only LOCAL,

STOP, and external keys work)

Suitable

environments

Power supply

voltage range

Power line frequency

Withstand voltage

Maximum rated

power

Fuse

Compatible

standards

: 100 - 120 V/200 - 240 V AC (auto-switching)

Dimensions

: Approx. 320 (W) × 90 (H) × 263 (D)mm

Approx. 12.6" (W) × 3.56" (H) × 10.40" (D)

(Without protruding parts)

: Approx. 7 kg/247.2 oz (without options)

: Power cord, spare fuse (integrated in inlet),

shorting bar × 2 (current output - voltage sensing terminal)

: 50 - 60 Hz

: 1.35 kV AC, 20 mA, 1 min., between power supply and chassis

: 350 VA (with optional equipment)

Mass

Standard

accessories

: 250VT3. 15AL

: 1. EMC : EN55011:1991+A1:1997+A2:1996

Group1 CLASS A

EN50082-1:1992

2. Safety : EN61010-1:1993+A1:1995

Contamination 2 Overvoltage category II

(expected overvoltage category 2500 V)

3157-01 AC GROUNDING HiTESTER

*For measurement, two 9296 or one each of 9296 and 9297 are required.

■ Options

9296 CURRENT PROBE

9518-02 GP-IB INTERFACE

9297 CURRENT APPLY PROBE

9593-02 RS-232C INTERFACE

9442 PRINTER

1196 RECORDING PAPER(25m, 10 rolls)

9443-02 AC ADAPTER(for printer, EU)

9443-03 AC ADAPTER(for printer, America)

9446 CONNECTION CABLE(for printer)

9297

9296

Length: approx. 1.5 m (59.3")

* 9296/9297 use dual wiring up to the probe tip.

DISTRIBUTED BY

ASM GmbH

Am Bleichbach 18 - 22

85452 Moosinning / Germany

All information correct as of Jan. 14, 1999. All specifications are subject to change without notice.

■Internet HIOKI website http://www.hioki.co.jp/

F3157E1-91M-03K Printed in Japan