LASCAR EM32-1B-LED Round Hole Mounting LED Voltmeter
Contents
1. ILO IHI a LASCAR 1 welascatelectronics com Page 2 of 4 EM32 1B LED Round Hole Mounting LED Voltmeter m o OO m CIRCUIT DIAGRAM R7 1 J amp 7nF 2 2 IM 2g AB Tig AB 1k5 c3 c2 a nl HI ANODE c DP DP2 DP3 z Ea I DPL DISPLAY SCREW TERMINAL FUNCTIONS OV Negative power supply to the meter V Positive power supply to the meter 5V nom IHI Positive measuringinput IHI must be no closer than 1 5V to either the positive or the internal negative supply ILO Negative measuring input ILO must be no closer than 1 5V to either the positive or the internal negative supply Note Internal negative supply This is generated from the supply voltage between V and OV and is negative with respect to OV For example if V 5V with respect to OV then the allowable common mode input range is from V 1 5V to V 1 5V or from 3 5V to 3 5V with respect to the OV power supply connection JUMPER LINKS J1 Connects ILO to COM when jumper linkis fitted J2 Connects ILO to OV when jumper linkis fitted a LASCAR wedascarelectronics com Page 3 of 4 EM32 1B LED Round Hole Mounting LED Voltmeter2. E CC OO SCALING Two resistors Ra and Rb may be used to alter the Ra full scale reading FSR of Voltage i al the meter see table The Vin meter will have to be re Minor Jin Rb EM32 1B LED calibrated by adjusting the Current g ILO calibration potentiometer fia on the rear of the module Ensure that Ra is rated for high voltage use APPLICATIONS Do not connect more than one meter to the same power supply if the meters cannot use the same signal ground Taking any input beyond the power supply rails will damage the meter 4 75 to 5 25V a 4 75 to 5 25V V V VE IHI Hl HI 200mV 200mV R gt Lo gt lLo __t Ilo ov ov R 2z ay ov ow ph o Measuring an input voltage referenced Measuring a single ended input Measuring current to a floating supply i e the input voltage referenced to supply i e the The meter s supply is isolated voltage and the meter s power supply input voltage and the meter s power from the current being measured are isolated from each other supply share the same OV rail Ensure Jumper link J1 is fitted Ensure Jumper link J1 is fitted Ensure Jumper link J1 is not fitted Ensure Jumper link J2 is not fitted Ensure Jumper link J2 is not fitted Ensure Jumper link J2 is fitted Specifications liable to change without prior warning EM32 1B LED Issue1 February 2003 M C Applies to EM32 1B LED 1 a LASCAR AWA Eel ics Page 4 of 4
3. EM32 1B LED Round Hole Mounting LED Voltmeter PRODUCT DESCRIPTION The EM32 1B LED is a 3 digit LED voltmeter whichis designed to be panel mounted in most low and medium volume applications The meter features 8mm digit height 3 decimal points auto polarity auto zero 200mV full scale reading and alow current consumption This product is designed so no soldering is required Connection is via screw terminals and options are selected via jumper links The module features a round metal bezel requiring a 32 5mm 1 28 diameter cut out Itis secured with the nut provided Protection from the front to IP 67 NEMA 4X standards is achieved by placing the rubber seal between the module and panel during assembly FEATURES e 8mm 0 31 Digit Height e 200mV d c Full Scale Reading e 50mA 5Vd c Operation e Auto zero and Auto polarity e Selectable Decimal Points e Requires 32 5mm 1 28 Diameter Cut out e IP67 NEMA 4X Protected TYPICAL APPLICATIONS e Panel Mount Instrumentation ORDERING INFORMATION e Process amp Control e Automotive Stock Number Standard Meter EM32 1B LED ELECTRICAL SPECIFICATIONS Specification in Unit Accuracy overall error Supply voltage V to V Supply current Input leakage current Vin OV To ensure maximum accuracy re calibrate periodically Operation of the meter beyond the maximum supply voltage rating may cause permanent damage to the meter Unless ot
4. herwise noted specifications apply at T 25 C Vapp 5Vd c and are tested with the module configured for floating input mode upply SAFETY To comply with the Low Voltage Directive LVD 93 68 EEC input voltages to the module s pins must not exceed 60Vdc The user must ensure that the incorporation of the panel meter into the user s equipment conforms to the relevant sections of BS EN 61010 Safety Requirements for Electrical Equipment for Measuring Control and Laboratory Use LASCAR ELECTRONICS LTD LASCAR ELECTRONICS INC LASCAR ELECTRONICS HK LIMITED MODULE HOUSE 3750 West 26th Street FLAT C 5 FL LUCKY FTY BLDG WHITEPARISH Erie 63 65 HUNG TO ROAD WILTSHIRE SP5 2S PA 16506 KWUN TONG KOWLOON UK USA HONG KONG TEL 44 1794 884567 TEL 1 814 835 0621 TEL 852 2797 3219 FAX 44 1794 884616 FAX 1 814 838 8141 FAX 852 2343 6187 E mail sales lascar co uk E mail us sales lascarelectronics com E mail b4lascar samsongroup com hk dD LASCAR p ICS Page 1 of 4 EM32 1B LED Round Hole Mounting LED Voltmeter DIMENSIONS ones All dimensions in mm inches ce a 23 5 0 95 p 5 5 0 22 gt lt p gt bm 1 5 0 06 3 0 0 12 gt 1 7 0 07 7 A i a s 3 3 A A 32 5 1 28 M i Panel cut out PANEL MOUNTING i ae ole j FUNCTIONAL BLOCK DIAGRAM CONNECTIONS rear view s AN Vref COM Men 19g 00 na RLO
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