Martel Electronics EM32-1B User Manual
PRODUCT DESCRIPTION
The EM32-1B is a 3 ½ digit LCD voltmeter which is 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 a very low current consumption. This product is designed so no soldering is required.
Connection is via screw terminals, and options are selectedvia jumper links. The module features a round metal
bezel, requiring a 32.5mm (1.28") diameter cut-out. It is 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
• 8
• 200mV d.c. Full Scale Reading
• 3.5 to 6.5V or 7.5 to 14.0V Operation
•
• Selectable
• Requires 32.5mm (1.28") Diameter Cut-out
• IP67 / NEMA 4X Protected
mm (0.31") Digit Height
Decimal Points
Auto-zero and Auto-polarity
TYPICAL APPLICATIONS
• Panel Mount Instrumentation
• Process & Control
• Automotive
SAFETY
To comply with the Low Voltage Directive (LVD93/68/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).
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 L1 in default configuration 3.5
150
Input leakage current (Vin = 0V) 1 10 pA
+
5.0 6.5** V d.c.
L1 re-configured 7.5 9.0 14.0** V d.c.
Supply current L1 in default configuration 500 A
L1 re-configured
A��
* 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 otherwise noted, specifications apply at T =25°C, V =5Vd.c. (f =48kHz) and are tested with the module configured for floating input
mode.
A supply clock
EM32-1B
Round Hole Mounting LCD Voltmeter
ORDERING INFORMATION
Stock Number
Standard Meter EM32-1B
Martel Electronics Corporation Tel: 800-821-0023
© Copyright 2005 Martel Eectronics Corporation All trademarks are the property of their respective owners. P/N 000000000 Rev. x
PO Box 770 Email: sales@martelcorp.com
Londonderry, NH 03053 USA Web: www.martelcorp.com
DIMENSIONS
All dimensions in mm (inches)
EM32-1B
Round Hole Mounting LCD Voltmeter
DIMENSIONS
All dimensions in mm (inches)
1.5 (0.06)
1.7 (0.07)
Panel cut-out
38.0 (1.5)
32.5
(1.28)
32.0 (1.26)
23.5 (0.93)
15.0 (0.59)
5.5 (0.22)
3.0 (0.12)
DIMENSIONS
All dimensions in mm (inches)
Vref
1
8
A/D
Neg Rail
Generator
+
_
ILO
RLO
COM
RHI
IHI
V+ V-
V+
DP 3 2 1
CAL
FUNCTIONAL BLOCK DIAGRAM
EM32-1B
Round Hole Mounting LCD Voltmeter
J1
J2
ILO IHI V+ 0V
0V
DIMENSIONS
All dimensions in mm (inches)
PANEL MOUNTING
1.5 (0.06)
1.7 (0.07)
Panel cut-out
2 3 41
38.0 (1.5)
32.5
(1.28)
32.0 (1.26)
23.5 (0.93)
15.0 (0.59)
5.5 (0.22)
3.0 (0.12)
CONNECTIONS (rear view)
0 V
V +
I H I
I L O
J2
L1
J1
RB
RA
2 Martel Electronics Corporation EM32-1B
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