Martel Electronics SP300 User Manual
SP 300
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3½ Digit LED Voltmeter Module
PRODUCT DESCRIPTION
The SP 300 features a 200mV d.c. measurement range with auto-zero and auto-polarity. 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 0V. The bright red LED display ensures excellent readability under low light conditions. It can be
blanked in applications requiring low power operation. 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 and seal ensures splash proofing in many applications.
FEATURES
•
9.4mm (0.37") Digit Height
• 200mV d.c. Full Scale Reading
• 50mA @ +5V d.c. Power Supply
•
Auto-zero and Auto-polarity
•
Programmable Decimal Points
• Bright Red
• Display Blanking Facility
• Simplified Connection
• Splash Proof
LED Display
TYPICAL APPLICATIONS
• Precision Instrumentation Systems
• Power Supply Monitoring
ORDERING INFORMATION
Stock Number
Standard Meter SP 300
• Test Boxes
• Panel-Mount Indication
ELECTRICAL SPECIFICATIONS
Specification Min. Typ. Max. Unit
Accuracy (overall error) * 0.1 % (±1 count)
Linearity ±1 count
Sample rate 2.5 samples/sec
Operating temperature range 0 50 °C
Warm-up time 10 minute
Temperature stability 150 ppm/°C
Supply voltage 4.75 5 5.25 V
Supply current
Input leakage current (Vin = 0V) 1 10 pA
* To ensure maximum accuracy, re-calibrate periodically.
50 mA
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 ensurethattheincorporationofthe 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.
PO BOX 50727
PALO ALTO
CA 94303-0727
USA
TEL: +1 (650) 838 9027
PO Box 770, Londonderry, NH 03053 1-800-821-0023
FAX: +1 (650) 833 5432
E-mail: lascarus@pacbell.net
www.martelcorp.com
www.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
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SP 300
DIMENSIONS
All dimensions in mm (inches)
3½ Digit LED Voltmeter Module
22.4 (0.88)
35.1 (1.38)
PANEL FITTING
Module Seal
34 (1.34)
21.3 (0.84)
Panel thickness: 1.0 - 3.0
Panel
(0.04 - 0.12)
20.5 (0.81)
27.9 (1.10)
2.54 (0.1)
33.0 (1.30)
Fixing Clip
ab c
a. 0.75 (0.03)
b. 10.00 (0.39)
c. 6.00 (0.24)
1
2
FUNCTIONAL BLOCK DIAGRAM
V+
Vref
COM
IH
CAL
+
_
A/D
8
1
IL
DP3210V
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.lascarelectronics.com
www.martelcorp.com
3 4
PIN CONFIGURATION
CAL
18
LCOM
V+
RB
RA
LA
0V
COM
DP1
IL
DP2
IH
(rear view)
DP3
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