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earth / ground testers unilap geo / geo x description at the locations involving the generation, distribution and consumption of electrical energy, certain safety measures must be met in order to protect human life. in many cases, these safety measures are national and international regulations which must be checked regularly. earthing , the connection of exposed conductive parts to the earth in case of a fault, represents the most fundamental safety measure. real life requires the earthing of transformers, high and medium voltage power pylons, railway tracks, tanks, vats, foundations and lightning protection systems. large fields of applications, the seasonal variations of the earth resistance, variations from weather and ground conditions, require test instrument able to collect and document additional information in order to ensure that the conditions under which the measurement was taken are known and that the results are reproducible. finally, the device must provide all of this information reliably with the greatest possible simplicity and ease of use. the unilap geo and unilap geo x provide the perfect solution by combining the latest technology and years of lem experience into a compact, field-rugged and extremely easy to use instrument. in addition to performing standard 3- and 4-pole earth resistance measurements, an innovative process accurately measures individual earth electrode resistances in single and meshed earthed systems without disconnecting any parallel electrodes! one specific application of this capability is quick and accurate measurement of power pylon grounds. the unilap geo (x) also incorporates the first truly automatic frequency control (afc) to minimise interference. before measuring, the instruments identify existing interference and select a measurement frequency to minimise its effect. the unilap geo (x) incorporates microprocessor controlled automatic measurements including checking probe hookup to ensure measurements are taken correctly and measuring all probe ground resistances to ensure reliable, repeatable results. probe resistance and auxiliary earth resistance are also measured and displayed. all measured data, as well as the time-of-day the measurement was taken, can be sent to computer or directly to the retrofitable docu- pack with built-in memory, printer and rs232 interface. in real life situations this means: - select function - press start button - read measured value unilap geo and unilap geo x also offer extra features: earthing resistance 3-pole and 4-pole of 0.001 ...300k , with voltages of 20 v/48 v ac, with frequencies of 94, 105, 111, 128 hz or afc (automatic frequency control), with automatic test of test lead connection and adjustable limit values resistance 2-pole ac 0.001 ...300 k noise voltage up to 50 v, noise frequency measurement of the earthing impedance of electricity pylons unilap geo x additionally offers: selective measurement of individual earth electrode resistance in interlinked or parallel ground systems (i.e. power pylons, grounding grids, lightning protection systems) without influence from other grounds. low resistance 2- and 4-pole 0.001 ...3 k with automatic polarity reversing and high short-circuit current as per iec 61557-4 display illumination serial interface (rs 232, optional) option docu-pack: memory, printer, interface pc-software wingeo as an option unilap geo automatic determination of auxiliary earth electrode- and probe- resistance displays all measuring results for as long as desired programmable limits - optical and acoustical warning at limit infringement long battery service-life because of short-time-measuring method and automatic switch-off operator quick reference on rear of instrument splashproof case ip56 (outdoor application) developed, designed and manufactured as per din iso 9001 unilap geo x additionally: measurements with current clamps: selective, stakeless resistance measurements with 250ma short circuit current output of measured values via interface on printer or pc measuring protocol via pc-software elmes heme norma
2 technical data display: 4-digit (2999), 7-segment- liquid crystal display, 18 mm high, with fluorescent and active illumination (geo x) working temperature: -10 c ... + 50 c operating temperature: 0 c ... + 35 c reference temperature: +18 c ... +28 c storage temperature: -30 c ...+60 c operating error: refers to operating temperature range intrinsic error: refers to reference temperature range climatic class: jwg as per din 40040 protective type: ip 56 as per din 40050 operating altitude: max. 2000 m safety: safety class ii ( ) as per iec/en 61010-1 max. noise voltage: 24 v, thereon measurements are locked power supply: 6 x 1.5 v alkali-mangan batteries (iec lr 6) or 1.5 v zink-carbon-batteries (iec r 6) or 1,2 v accus dimensions: 240 x 180 x 110 mm (l x w x h) weight: approx. 1.5 kg incl. batteries approx. 5.9 kg incl. 4 pcs. batteries and accessories in carrying case warranty: 2 years calibration interval: 3 years, recomended unilap geo noise voltage (dc + ac) (ust) measuring method: mean value rectification measuring range display range resolution frequency range intrinsic error 1 ... 50 v 0.0 ... 50 v 0.1 v dc/ac (5 % of mv + 5d) 45...400hz sine measuring rate: approx. 4 measurements/s internal resistance: approx. 1.5 m max. overload: u eff = 250 v interference frequency (fst) measuring method: measurement of period of noise voltage measuring range display range resolution v-range operating error 16...400 hz 16.0...300...999 0.1...1hz 1v... 50 v (1 % of mv + 2d) earthing resistance r a (r e ) as per iec 61557-5: measuring method: current and voltage measurement with probe measuring voltage: 20/48 v ac - switchable short circuit current: 250 ma measuring frequency: 94/105/111/128 hz manual or autom. (afc) switchable, 55 hz for r* max. overload: u eff = 250 v switch position measuring range resolution intrinsic error operating error 3pole 0.020 ...300k 0.001...100 (2 % of mv + 2d) (5 % of mv + 5d) 4pole automatic range selection measuring time: typ. 8 sec. with fixed frequency chosen max. 30 sec. with autom. frequency selection max. probe resistance: <1 m max. auxiliary earth res.: <1 m display shows warning r s resp. r h , if ratio r h /r e is too high max. noise voltage: 24 v, above no measurement is started noise voltage suppr.: 120db (16 2 / 3 , 50, 60, 400 hz) resistance (r~): measuring method: 2-pole current and voltage measurement measuring voltage: 20 v ac short circuit current: 250 ma ac measuring frequency: 94/105/111/128 manual or autom. (afc) switch positon measuring range resolution intrinsic error operating error ra 2pole 0.020 ...300k 0.001...100 (2 % of mv + 2d) (5 % of mv + 5d) measuring time: typ. 6 sec. max. noise voltage: 24 v, above no measurements started max. overload: u eff = 250 v r* - earthing impedance with 55 hz for calculation of short circuit current in power distribution systems unilap geo x: noise voltage (dc + ac) (ust) measuring method: mean value rectification measuring range display range resolution frequency range intrinsic error 1 ... 50 v 0.0 ... 50 v 0.1 v dc/ac (5% of mv + 5d) 45...400hz sine measuring rate: approx. 4 measurements/s internal resistance: approx. 1.5 m max. overload: u eff = 250 v interference frequency (fst) measuring method: measurement of period of noise voltage measuring range display range resolution voltage range operating error 16...400 hz 16,0...300...999 hz 0,1...1hz 1v... 50 v (1 % of mv + 2d) earthing resistance r a (r e ) as per iec 61557-5: measuring method: current and voltage measurement with probe measuring voltage: 20/48 v ac switchable short circuit current: 250 ma measuring frequency: 94/105/111/128 hz manual or autom. (afc) switchable, 55 hz for r* max. overload: u eff = 250 v switch position measuring range resolution intrinsic error operating error 3pole 0.020 ...300k 0.001...100 (2 % of mv + 2d) (5 % of mv + 5d) 4pole automatic range selection measuring time: typ. 8 sec. with fixed frequency chosen max. 30 sec. with autom. freuency selection max. probe resistance: <1 m max. auxiliary earth electrode resistance: <1 m display shows warning r s resp. r h , if ration r h /r e is too high max. noise voltage: 24 v, above no measurement is started noise voltage suppr.: 120db (16 2 / 3 , 50, 60, 400 hz) selective earthing resistance (r a ): with supplementary current transformer switch position measuring range resolution intrinsic error operating error 3-pole 0.020 ...30k 0.001...10 (7 % of mv + 2d) (10 % of mv + 5d) 4-pole transformer ratio: 80...1200 : 1,(adjustable) minimal current in single branch to be measured: 0,5 ma with transformer 1000:1 0,05 ma with transformer 100:1 intrinsic error: operating error (r a) + error (clamp) other data see earthing resistance ( r a ) resistance (r ... ) as per iec 61557-4: measuring method: current and voltage measurements 2-pole and 4-pole method possible open-circuit voltage: 20 v dc short circuit voltage: 250 ma dc switch position measuring range resolution intrinsic error operating error r a ... 2-pole 0.020 ...3k 0.001...1 +(2 % of mv + 2d) +(5 % of mv + 5d) 4-pole measuring time: approx. 4 sec. with reversing of polarity max. noise voltage: <3 v ac/dc, above no measurement started max. inductivity: 2 henry max. overload: u eff = 250 v resistance (r~) measuring method: 2-pole current and voltage measurement measuring voltage: 20 v ac short circuit current: 250 ma ac measuring frequency: 94/105/111/128 man./autom. (afc) switchable switch position measuring range resolution intrinsic error operating error r a 2-pole 0.020 ...300k 0.001...100 +(2 % of mv+ 2d) +(5 % of mv + 5d) measuring time: typ. 6 sec. max. noise voltage: 24 v, above no measurement will be started max. overload: u eff = 250 v r* - earthing impedance with 55 hz for calculation of short circuit current in power distribution systems ra r a r a
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4 functions win geo: data acquisition from unilap geo x (support of all measuring functions) data export of measured data (ascii) to windows ? applications (winword ? , excel ? , access ? measurement protocols - the values are transfered automatically (dde) to forms of windows ? applications remote control of unilap geo x - selection and initiation of measuring functions, downloading measurement values setup - setting of date/time, input of user defined text diagnose - display/print settings of unilap geo x rs232 interface (option): electrical data: - voltage levels according to eia rs 232c specifications - parameters: 2400 baud, 8 data bits, no parity, 1 stop bit - half duplex - lines: gnd; txd, rxd; rts - test voltage: 3 kv ac - nonvolatile memory for 48 characters of user defined text (incl. control characters , ) software - setup/diagnose software on 3 1 / 2 inch disk, 1.44 mb, for all pcs higher than dos 3.3 unilap geo x + win geo - - the professional system for earth measurements
5 order codes description order-no. unilap geo basic set a 1885 06110 unilap geo 2 measuring leads 1.5 m long 2 alligator clips 1 carrying strap 6 batteries manual in english, german or french delivered in carrying case unilap geo a 1885 06111 same as a 1885 06110 and additionally. 4 earth stakes 3 reels with 2x25m and 1x50m wire unilap geo x basic set a 1885 06210 unilap geo x 2 measuring leads 1.5 m long 2 crocodile clips 1 carrying strap 6 batteries manual in english, german or french delivered in carrying case unilap geo x with geo measuring set 4pole a 1885 06211 same as a 1885 06210 and additionally: 4 earth stakes 3 reels with 2x25m and 1x50m wire unilap geo x with interface and geo measuring set 4pole a 1885 06212 same as a 1885 06211 additionally: 1 interface rs232 1 set-up software 1 rs232 cable and pc adapter unilap geo x + docu-pack + a 1885 06215 geo measuring set 4pole same as a 1885 06211 additionally: 1 docu-pack 1 set-up software 1 rs232 cable and pc adapter 2 paper rolls accessories geo-measuring set 3-pole a 6045 10302 2 earth stakes, 1 reel with 25m wire 1 reel with 50m wire measuring set 4-pole a 6045 10301 4 earth stakes, 2 reels with 25m wire, 1 reel with 50m wire geo-clamp set ?selective? a 6045 10305 for selective measurements 1 clamp 100a, 1 connector clamp cable geo-clamp set ?stakeless? a 6045 10306 for stakeless earth resistance measurements 1 clamp 100a, 1 clamp 1000a 1 clamp connector cable 1 adapter for stakeless measurements 1 manual description order-no. carrying case a 6030 00520 for unilap geo / geo x and accessories pc-software wingeo for unilap geo x a 6899 00172 windows software for setup of unilap geo x, diagnosis, data acquisition, protocol generation, operating instructions, 3 1/2 ? disk current transformer 1000a , opening up to a 6805 01010 54 mm, for selective earth resistance measurements current transformer 100a , opening up to 12 mm, a 6805 01007 for selective earth resistance measurements adapter for stakeless earth measurements a 6403 06311 (2 clamps necessary) split-core current transformer a 6805 06211 for measurements on high voltage pylons up to 310 mm accumulator set 1500 mah a 6403 04111 1,5 ah nicd-accu, electronics, mains adapter accumulator set 600 mah a 6403 06211 0,6 ah nicd-accu, electronics, mains adapter, cable for 12 v car system, manual. versions gb for uk, us for usa earth stake 35 cm a 6045 10350 reel with 25 m cable a 6045 05102 reel with 50 m cable a 6045 05103 3 alligator clips a 6009 17103 3 test tips a 6009 54300 docu-pack for geo x a 6412 06111 rs232 interface, memory and printer. incl. 2 paper rolls, 1 rs232 cable, setup/diagnosis software, mounting panels, modified battery cover and manual interface rs 232 for geo x a 6412 06211 for data transfer to printer or pc incl. 3 1/2? disk with setup + diagnose software, cable for pc, manual thermoprinter dpu 201 for saturn geo x a 6413 06111 with interface, data printing via rs232 paper for printer dpu 201 a 6202 46111 adapter rs232-centronics a 6045 00610 adapter, cable for direct printing from rs232 interface on centronics printers
lem norma gmbh export department palmersstrasse 2 a-2351 wiener neudorf tel: + 43(0)2236 691 0 fax: +43(0)2236 63 080 e-mail: lno@lem.com great britain & ireland lem uk ltd geneva court 1 penketh place west pimbo skelmersdale, lancashire wn8 9qx tel: +44(0)1 695 72 07 77 fax: +44(0)1 695 50 704 e-mail: luk@lem.com printed in austria. technical modifications reserved. publication a 99 000525 distributor netherlands lem nederland b.v. rijzendeweg 5 nl-4634 tv woensdrecht tel: +31(0)16 46 154 62 fax: +31(0)16 46 166 06 e-mail: lne@lem.com nafta lem instruments inc. 23822 hawthorne boulevard #100 us-torrance, ca 90505 tel: +1 310 373 09 66 fax: +1 310 373 90 56 e-mail: liu@lem.com belgium & luxemburg lem belgium sprl-bvba route de petit-roeulx, 95 b-7090 braine-le-comte tel: +32(0)67 55 01 14 fax: +32(0)67 55 01 15 e-mail: lbe@lem.com

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