Martel Electronics EM32-1B-LED User Manual
EM32-1B -LED
Round Hole Mounting LED Voltmeter
PRODUCT DESCRIPTION
The EM32-1B-LED is a 3 ½ digit LED voltmeter which is designed to be panel mounted in most low and medium
volume applications. The meter features 8mmdigitheight,3decimalpoints,auto-polarity,auto-zero, 200mV full
scale reading and a low current consumption. This product is designed so no soldering is required. Connection is
via screw terminals, and options are selected via 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
mm (0.31") Digit Height
• 200mV d.c. Full Scale Reading
• 50mA @ 5Vd.c. Operation
•
Auto-zero and Auto-polarity
• Selectable
• Requires 32.5mm (1.28") Diameter Cut-out
• IP67 / NEMA 4X Protected
Decimal Points
TYPICAL APPLICATIONS
• Panel Mount Instrumentation
• Process & Control
• Automotive
ORDERING INFORMATION
Stock Number
Standard Meter EM32-1B-LED
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 150 ppm/°C
Warm-up time 10 minutes
Supply voltage (V+ to V-) 4.75
Supply current 50 100 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.
Unless otherwise noted, specifications apply at T =25°C, V =5Vd.c. and are tested with the module configured for floating input mode.
A supply
5 5.25 V d.c.
+
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 confor ms to the
relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for Measuring, Control and
Laboratory Use).
Martel Electronics Corporation Tel: 800-821-0023
PO Box 770 Email: sales@martelcorp.com
Londonderry, NH 03053 USA Web: www.martelcorp.com
© Copyright 2005 Martel Eectronics Corporation All trademarks are the property of their respective owners. P/N 000000000 Rev. x
EM32-1B -LED
Round Hole Mounting LED Voltmeter
DIMENSIONS
All dimensions in mm (inches)
1.7 (0.07)
32.5
(1.28)
Panel cut-out
PANEL MOUNTING
1.5 (0.06)
15.0 (0.59)
5.5 (0.22)
3.0 (0.12)
38.0 (1.5)
23.5 (0.93)
32.0 (1.26)
23 41
FUNCTIONAL BLOCK DIAGRAM
V+
RHI
COM
J2
RLO
ILO
IHI
+
_
V+ V-
J1
ILO IHI V+ V-
2 Martel Electronics Corporation EM32-1B-LED
CAL
A/D
Vref
1
DP 3 2 1
8
CONNECTIONS (rear view)
J2J1
0V
V+
IHI
ILO
CAL
RB
RA
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