Martel Electronics SP400 User Manual
SP 400-BLUE 3½ Digit Backlit LCD Voltmeter Module
PRODUCT DESCRIPTION
The SP 400-BLUE features a 200mV d.c. measurement range with auto-zero and auto-polarity. Decimal points are user selectable.
The SP 400-BLUE features a negative rail generator which enables the meter tomeasure a signal referencedto its own powersupply
GND. Blue
using the fixing clip provided. The module's
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
• Blue
• Low Battery Warning
• Splash Proof
LED backlighting ensures excellent readability under low light conditions. The module is easily fitted into the panel,
low cost means it will suit high and low volume applications. The design of the panel
LED Backlighting
TYPICAL APPLICATIONS
• Precision Instrumentation Systems
• Power Supply Monitoring
ORDERING INFORMATION
Stock Number
Standard Meter SP 400-BLUE
• Test Boxes
• Panel-Mount Indication
• Low Power Voltage Measurement
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
Temperature stability 100 ppm/°C
Supply voltage V+ to GND configuration 3.0 5.0 7.5 V d.c.
Supply current V+ to GND configuration 350 A
Backlight supply voltage 7.5*** 8.0 V d.c.
Backlight supply current @ 7.5V d.c. 9**** mA
Input leakage current (Vin = 0V) 1 10 pA
* 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 7.5V, see Applications.
**** This specification linearly derates to 5mA @ 50°C.
Unless otherwise noted, specifications apply at T =25°C, V =5Vd.c. (f =48kHz) and are tested with the module configured for single ended
input mode.
V+ to V- configuration 6.0 9.0 15.0** V d.c.
m
V+ to V- configuration
A supply clock
175 A
m
SAFETY
To comply with theLow Voltage Directive (LVD 93/68/EEC), input voltagesto the module’s pins must not exceed
60Vdc. The user mustensurethatthe incorporation of the panel meterintotheuser’s equipment conforms tothe
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
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 400-BLUE 3½ Digit Backlit LCD Voltmeter Module
DIMENSIONS
All dimensions in mm (inches)
a. 0.75 (0.03)
b. 10.00 (0.39)
c. 6.00 (0.24)
ab c
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)
6.76 (0.27)
20.5 (0.81)
2.54 (0.1) pitch
33.0 (1.30)
Fixing Clip
4.27 (0.17)
4.22 (0.17)
0.64 (0.03)
1
2
FUNCTIONAL BLOCK DIAGRAM
V+
Vref
CAL
BL-
INH
INL
+
_
A/D
V-
DP321GND
8
1
www.lascarelectronics.com
3 4
PIN CONFIGURATION
INH
LBAT
INL
DP1
DP2
LCOM
CAL
19
BL-
V+
GND
(rear view)
V-
DP3
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