1999 3157-01 ac grounding hitester protective ground tester indispensable for standard certification ce certified low-resistance measurement compliant with major safety standards iso14001 jqa-e-90091 hioki company overview, new products, environmental considerations and other information are available on our website. http://www.hioki.co.jp/ electronic measuring instrument 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 carry out measurements in accordance with the stipulations of multiple standards.
compliant with a multitude of standards 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. constant-current testing (max. 31.0 a) with feedback control 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. setting value store function up to 20 settings can be stored, allowing quick switching between the various setups for different standards and legal requirements. major features main applications standards supported by the 3157-01 iec60065 [safety requirements for mains operated electronic and related apparatus for household and similar general use] iec60204-1 [electrical equipment of industrial machines -part1,general requirements] iec60335-1 [safety of household and similar electrical appliances - part 1, general requirements] iec60601-1 [medical electrical equipment -part 1, general requirements for safety] ?oft start?function 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. 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. 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) 7 kg(247.2 oz)] low-resistance measurements in accordance with all major safety standards 1 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 iec60950 [safety of data processing equipment, including office equipment] iec61010-1 [safety requirements for measurement, control, and laboratory electrical equipment] ul standard relevant standards (ul 1012, ul 1270, ul 1409, ul 1419, ul 1437, ul 2601, etc.)
a multitude of functions in a compact body ? pass/fail hold function setting determines whether the condition is held after detecting pass or fail. ? output current frequency switching (0: 50 hz / 1: 60 hz) ? 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. ? use test lower limit setting (0: no / 1: yes) disabling the setting allows only the upper limit to be set. enabling the setting allows also the lower limit to be set. ? 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. ? test data count function (0: disable/1: enable) allows counting of test points for equipment with many test points. ? buzzer setting ? enable current control in test condition (0: no/1: yes) allows changing of the output current value while a test is in progress. ? momentary out 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) ? test mode 0: soft start mode 1: normal mode 2: continuous test mode print function 0: not used 1: automatically print pass/fail result 2: optionally print in pass/fail hold condition easy standard testing measurement range versatile functions external i/o external interface (option) 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. output current [ a ] load resistance [ ? ] measurement current measurement time remaining time measurement value measurement value upper limit test condition file number 0 0 0.5 1.0 1.8 1.5 10 20 30 open terminal voltage 6 v line maximum output power 130 va line for 6 a output, 6 v line yields 6 (v) =1.0 [ ? ] 6 (a) for 25 a output, 130 va line yields 130 (va) =0.208 [ ? ] 25 2 (a 2 ) preparation measurement result * if hold is not enabled, unit reverts to ready condition after 1 second. ? ? ? ? ? ? ? ? ? ? (pressing shift + stop keys allows the user to make settings for each function.) 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 printing method : thermal serial dot printer paper width : 112 mm printing speed : 52.5 cps power source : 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. 2 measurement range 0 1 2 3 pass no yes no yes fail yes yes no no 0 1 2 3 evaluation on off off on error on off on off fail pass 11 11
3157-01 specifications options : 0 - 1.800w (0.001w resolution) : (2% rdg. +4 dgt.) after zero-adjust : 0 - 35.0 a ac (0.1 a resolution) : (1% rdg. +5 dgt.) (at 3 a or more) : counts down time after start until preset time : 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) : pwm constant current control : 3.0 a - 31.0 a ac (0.1 a resolution), into 0.1w load : (1% of setting + 0.2 a) within maximum output power range : 130 va (at output terminals) * * subject to derating according to ambient temperature [80% at 40?c (104?f)] : max. 6 v ac : 50 hz or 60 hz sine wave (selectable) : apply current only after checking load connection basic functions resistance measurement range accuracy current monitoring range accuracy setting on setting off setting range setting resolution accuracy : 0 - 6.00 v ac (single range 0.01 v resolution) : (1% rdg.+5 dgt.) : 0.5 s voltage monitor range accuracy monitoring cycle : pass/fail evaluation using preset upper/lower limit : internal buzzer (pass/fail, on/off switchable) and i/o output : for measurement probe impedance cancellation : 0 - 0.100w : max. 20 settings (with save/load) : 1. external i/o * output signals: pass /up fail /low fail /test /ready .... open collector input signals: start /stop /external i/o enable .... 5 - 24 v dc 2. front ext connector * 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) : 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) comparator function comparator result output zero-adjust function zero-adjust range memory function interfaces dimensions mass standard accessories : fluorescent tube (digital display) : 0 to +40 ? c (32 to 104 ? f), 30 to 90% rh (no condensation) : -10 to +50 ? c (14 to 122 ? f), 10 to 95% rh (no condensation) :23 ? c 5 ? c (71.3 ? f 9 ? f) 30 to 90% rh (no condensation) after 30-minute warmup period : indoors, altitude up to 2000 m : 100 - 120 v/200 - 240 v ac (auto-switching) : 50 - 60 hz : 1.35 kv ac, 20 ma, 1 min., between power supply and chassis : 350 va (with optional equipment) : 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) display ambient conditions for use ambient conditions for storage ambient conditions for assured accuracy suitable environments power supply voltage range power line frequency withstand voltage maximum rated power fuse compatible standards basic specifications general specifications [ generator section ] [ other functions ] [ monitor section ] [ timer section ] 9518-02 gp-ib interface 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) 3157-01 ac grounding hitester *for measurement, two 9296 or one each of 9296 and 9297 are required. 9296 current probe 9297 current apply probe * 9296/9297 use dual wiring up to the probe tip. 9296 9297 3 length: approx. 1.5 m (59.3") length: approx. 1.5 m (59.3") f3157e1-91m-03k printed in japan distributed by all information correct as of jan. 14, 1999. all specifications are subject to change without notice. : ac 4-terminal method resistance measurement current generator principle current setting range accuracy maximum output power open-terminal voltage generator frequency soft start function inter net hioki website http://www.hioki.co.jp/ a s m g mbh a m bleichbach 18 - 22 8 54 52 m oo si nn ing / germany
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