SP300

S P 3 OO 3% Digit LED Voltmeter Module i ~~ee~~ 

The SP 300 features a 200mV d.c. measurement range with auto ~~-~~ zero and auto ~~-p~~ olarity. Decimal points are user selectable. The SP 300 features a negative rail generator which enables the meter to measure a signal referenced to its own power supply OV. The bright red LED display ensures excellent readability under low light conditions. The module is easily fitted into the panel, usingthe fixing clip provided. The module's low cost meansit will suit high and low volume applications. The design of the panel meter's housing and seal ensures splash proofing in many applications. 

- 9.4mm (0.37") Digit Height 

- 200mV d.c. Full Scale Reading 

- * 50mA @ +5V d.c. Power Supply ¢ Auto ~~-z~~ ero and Auto ~~-p~~ olarity 

- Programmable Decimal Points 

- * Bright Red LED Display 

- Simplified Connection 

- * Splash Proof 

- Precision Instrumentation Systems 

- * Power Supply Monitoring 

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&<br>YY<br>|<br>Stock Number<br>Standard Meter SP 300<br>**----- End of picture text -----**<br>


- Test Boxes 

- Pane ~~l-~~ Mount Indication 

|||||||
|---|---|---|---|---|---|
|Accuracy (overall error) *||0.1||% (+1 count)||
|Linearity|||+1|count||
|Linearity<br>Sample rate||2.5|+1|count<br>samples/sec|count<br>samples/sec|
|Operating temperature range|0||50|°C||
|Warm~~-u~~p time||10||minute||
|Temperature stability||150||ppm/°C|ppm/°C|
|Supply voltage|4.75|5|5.25|V||
|Supply current||50||mA||
|Input leakage current (Vin = OV)||1|10|pA||



* To ensure maximum accuracy, re ~~-~~ calibrate periodically. 

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) LTD. MODULE HOUSE 4258 WEST 12th STREET 8th FLOOR, CHINA AEROSPACE CENTRE, WHITEPARISH ERIE 143 HOI BUN ROAD, WILTSHIRE SP5 2S} PA 16505 KWUN TONG, KOWLOON, UK USA HONG KONG TEL: +44 (1794) 884567 TEL: +1 (814) 835 0621 TEL: +852 2389 6502 FAX: +44 (1794) 884616 FAX: +1 (814) 838 8141 FAX: +852 2389 6535 E ~~-~~ mail: sales@lascar.co.uk E ~~-~~ mail: us ~~-~~ sales@lascarelectronics.com E ~~-~~ mail: saleshk@lascar.com.hk Specifications liable to change without prior warning SP 300 Issue 7 06/2010 S.L. Applies to SP 300/1 (U LASCAR _ .lascarelectronics.com No: 695 - Page 1 of 4 

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SP 300 

3% Digit LED Voltmeter Module 

~~ren~~ 

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CIRCUIT DIAGRAM<br>**----- End of picture text -----**<br>


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veal<br>Not fitted as standard.<br>LA<br>IH 4 R2 cL 2 7 PoL 22 1 POL COMMON xs<br>{I Lt nF Riieae | INT 48228AB ANODE<br>A/Z<br>Re* \ @ iL “ BUFF rey ESTe<br>IL 4 Into Gi es (2) 759 Lepi<br>REF LO 82 eu82 7,<br>&ND GND bs Gss]s5<br>les<br>V+ se care 2 op: [2 5 op:<br>US ah 37 test ssFe (199.3) (199.9)<br>V- _DGND<br>TEST 26<br>“ll<br>TEST —__—. TEST<br>S|] con ———!9. oy<br>Pins not fitted<br>as standard<br>RE ke<br>1k5 J]<br>*Pot Adjustment:- Clockwise rotation (viewed from rear of module) decreases resistance &<br>also REFHI W.R.T. COM. therefore increasing the reading with a@ constant input.<br>Links:-LA & LCOM on rear of PCB<br>PIN FUNCTIONS<br>1. V+ Positive power supply to the meter.<br>2. OV OV power supply connection to the meter.<br>3. COM_ Ground for analogue section of A/D converter.<br>Itis actively held at3.05V (nom) below V+ and must not be allowed to sink excessive current<br>(> 100A) by, for instance, connecting to a higher voltage.<br>4. TH Positive measuring input.<br>5. IL Negative measuring input.<br>6. DP1  ConnecttoO0V to display DP1 (199.9).<br>7. DP2  ConnecttoOV to display DP2 (19.99).<br>8. DP3  ConnecttoO0V to display DP3 (1.999).<br>Note:<br>A negative supply is generated negative supply is generated supply is generated is generated generated internally and mirrors the positive and mirrors the positive mirrors the positive the positive positive supply. For example: example: if V+ V+ is +5V, then<br>the internally generated V- is -5V. When measuring with measuring with with the input referenced referenced to the same same supply rail<br>that of the panel meter, then the limitations on the input range are (V- + of the panel meter, then the limitations on the input range are (V- + the panel meter, then the limitations on the input range are (V- + panel meter, then the limitations on the input range are (V- + meter, then the limitations on the input range are (V- + then the limitations on the input range are (V- + the limitations on the input range are (V- + limitations on the input range are (V- + on the input range are (V- + the input range are (V- + input range are (V- + range are (V- + are (V- + (V- + + 1.5V) to(V+ to(V+ -1.5V).<br>Solder Links:<br>LCOM ~~ NormallyOpen. ConnectsILtoCOM.<br>Specifications liable to change without prior warning SP 300 Issue 7 06/2010 S.L. Applies to SP 300/1<br>((m LASCAR www.lascarelectronics.com No: 695 - Page 3 of 4<br>**----- End of picture text -----**<br>


A negative supply is generated negative supply is generated supply is generated is generated generated internally and mirrors the positive and mirrors the positive mirrors the positive the positive positive supply. For example: example: if V+ V+ is +5V, then the internally generated V- is -5V. When measuring with measuring with with the input referenced referenced to the same same supply rail as that of the panel meter, then the limitations on the input range are (V- + of the panel meter, then the limitations on the input range are (V- + the panel meter, then the limitations on the input range are (V- + panel meter, then the limitations on the input range are (V- + meter, then the limitations on the input range are (V- + then the limitations on the input range are (V- + the limitations on the input range are (V- + limitations on the input range are (V- + on the input range are (V- + the input range are (V- + input range are (V- + range are (V- + are (V- + (V- + + 1.5V) to(V+ to(V+ -1.5V). 

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