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SP 4000 pages
SP 400
3½ Digit Backlit LCD Voltmeter Module
PRODUCT DESCRIPTION
The SP 400 features a 200mV d.c. measurement range with auto-zero and auto-polarity. Decimal points are user selectable. The SP
400 features a negative rail generator which enables the meter to measure a signal referenced to its own power supply GND. LED
backlighting ensures excellent readability under low light conditions. The module is easily fitted into the panel, using the fixing clip
provided. The module's low cost means it will suit high and low volume applications. The design of the panel meter's housing ensures
splash proofing using the supplied seal.
FEATURES
• 9.75mm (0.38") Digit Height
• 200mV d.c. Full Scale Reading
• 3.0 to 7.5V or 6.0 to 15.0V Operation
• Auto-zero and Auto-polarity
• Programmable Decimal Points
• LED Backlighting
• Low Battery Warning
• Splash Proof
TYPICAL APPLICATIONS
ORDERING INFORMATION
• Precision Instrumentation Systems
• Power Supply Monitoring
• Test Boxes
• Panel-Mount Indication
• Low Power Voltage Measurement
Stock Number
SP 400
Standard Meter
ELECTRICAL SPECIFICATIONS
Specification
Accuracy (overall error) *
Linearity
Sample rate
Operating temperature range
Temperature stability
Supply voltage
V+
V+
Supply current
V+
V+
Backlight supply voltage
Backlight supply current @ 5V d.c.
Input leakage current (Vin = 0V)
Min.
Typ.
Max.
Unit
0.1
% (±1 count)
count
samples/sec
°C
ppm/°C
V d.c.
V d.c.
µA
µA
V d.c.
mA
pA
±1
2.5
0
to
to
to
to
GND
VGND
V-
configuration
configuration
configuration
configuration
3.0
6.0
4.75
50
100
5.0
9.0
350
175
5.0
40
1
7.5
15.0**
***
80****
10
* To ensure maximum accuracy, re-calibrate periodically.
** Operation of the meter beyond the maximum supply voltage rating may cause permanent damage to the meter.
*** An external series resistor is required above 5V, see Applications.
**** This specification linearly derates to 50mA @ 50°C.
Unless otherwise noted, specifications apply at TA=25°C, Vsupply=5Vd.c. (fclock=48kHz) and are tested with the module configured for single ended
input mode.
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.
MODULE HOUSE
WHITEPARISH
WILTSHIRE SP5 2SJ
UK
TEL: +44 (1794) 884567
FAX: +44 (1794) 884616
E-mail: sales@lascar.co.uk
LASCAR ELECTRONICS INC.
3750 WEST 26th STREET
ERIE
PA 16506
USA
TEL: +1 (814) 835 0621
FAX: +1 (814) 838 8141
E-mail: us-sales@lascarelectronics.com
LASCAR ELECTRONICS (HK) LIMITED
FLAT C, 5/FL., LUCKY FTY. BLDG.
63-65 HUNG TO ROAD
KWUN TONG
KOWLOON
HONG KONG
TEL: +852 2797 3219
FAX: +852 2343 6187
E-mail: b4lascar@samsongroup.com.hk
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.martelcorp.com
www.lascarelectronics.com
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