Martel Electronics QM100V User Manual

QM 100V Single Hole Mounting 2-Wire Meter

QM 100V is an easy to mountLC D digitalpanel meter.

measuring. Only valid readingsare displayed; themodule indicates"LO"at voltages below4V and "HI" at voltagesabove 25V.
drill a single 5.5mm / hole in the panel. The module is tted to the panel by locating its threaded stud through the hole, tting the washer and tightening the nut
provided. The module's connecting wires pass through the hollow stud into the target application for connection.
protection forthe unitwhen ttedto themeter duringinstallation.

7

"

/

32

The modulefeatures a4 to25V measurementrange with100mV resolutionand ispowered fromthe signalit is

To install the meter, theuser need only

A rubber seal is included, providing splashproof

Single Hole Mounting

2-Wire Operation

4to25

V d.c. Full Scale Reading

12.5mm / 0.5" LCD Digit Height

Reverse Polarity Protection

Splashproof

APPLICATION

+4 to +25V d.c.

RED

BLACK

0V

Easy Mounting V oltmeter QM 100V

Specication Min. Typ. Max. Unit

Valid displayed reading* 4.0 25.0 V d.c.

Operating temperature range 0 50 °C

* Atvoltages below4.0V d.c.,the LCDwill display and willultimately goblank.

At Voltages inexcess of25.0V d.c.,the LCD will display .
Do NOTexceed 50V d.c., asthis maydamage themeter.
The moduleincludes reversepolarity protectionup to30V forup to30 seconds.
Operation andaccuracy atvoltages above25.0V orbelow 4.0Vare notspecied.

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LO

HI

Shown Actual Size

Stock Number

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SAFETY

To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s wires must not exceed 60Vd.c. The user must ensure that the
incorporation of the 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).

DIMENSIONS All dimensions in mm (inches)

21.40 (0.84)

43.50 (1.71)

REAR VIEW

10.70
(0.42)

10.70
(0.42)

FITTING THE EMV 1200-40

FITTING THE QM100V

Drill a 5.5mm / " hole in the panel.
the panel by passing its screw threaded stud and the wires through the hole, tting the
washer and tightening the nut provided. Take care not to trap either of the connecting
wires. Do

not to overtighten the nut as this may damage the meter.

CAL

21.75 (0.85)

Module thickness: 5.5mm (0.22")

7

/

32

21.75 (0.85)

Fit seal to the rear of the module. Fit the module to

5.00
(0.20)

Reading when Vin < 4V,

before display switches o.

Reading when Vin > 25V.

WARNING! In automotive applications or where an alternator
is present and there is the possibility of a transient voltage
spike it is recommended to use some type of transient
voltage suppressor (TVS) to protect the meter.

METER

TVS DIODE

+–

Seal

EMV 1200-40

QM100V

TVS ZENER DIODE
Martel Part Number: 80311

Digikey (www.digikey.com)
Part Number: 1N6287AGOS-ND

9.0

(0.35)

Panel

2 wires - 30cm (12.0)

Nut

Washer

PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.martelcorp.com