QM100V【PDF 1/1 页】LCD DC VOLTMETER 4-25 VDC

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QM 100V

Single Hole Mounting 2-Wire Meter

QM 100V is an easy to mount LCD digital panel meter. The module features a 4 to 25V measurement range with 100mV resolution and is powered from the signal it is

measuring. Only valid readings are displayed; the module indicates "LO" at voltages below 4V and "HI" at voltages above 25V. To install the meter, the user need only

drill a single 5.5mm / 7 / 32 " hole in the panel. The module is fitted to the panel by locating its threaded stud through the hole, fitting the washer and tightening the nut

provided. The module's connecting wires pass through the hollow stud into the target application for connection. A rubber seal is included, providing splashproof

protection for the unit when fitted to the meter during installation.

Single Hole Mounting

2-Wire Operation

4 to 25 V d.c. Full Scale Reading

12.5mm / 0.5" LCD Digit Height

Reverse Polarity Protection

Splashproof

Easy Mounting V oltmeter

Shown Actual Size

Stock Number

QM 100V

APPLICATION

RED

+4 to +25V d.c.

Specification

A c c u r a c y ( o v e r a l l e r r o r )

L i n e a r i t y

Valid displayed reading*

Min.

4.0

Typ.

0 . 2

Max.

± 1

25.0

Unit

V ( ± 1 c o u n t )

c o u n t

V d.c.

R e s o l u t i o n

S a m p l e r a t e

1 0 0

m V d . c .

s a m p l e / s e c

Operating temperature range

S u p p l y v o l t a g e

S u p p l y c u r r e n t

5 0

°C

V d . c .

m A

BLACK

* At voltages below 4.0V d.c., the LCD will display LO and will ultimately go blank.

At Voltages in excess of 25.0V d.c., the LCD will display HI .

Do NOT exceed 50V d.c., as this may damage the meter.

The module includes reverse polarity protection up to 30V for up to 30 seconds.

Operation and accuracy at voltages above 25.0V or below 4.0V are not specified.

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)

Reading when Vin < 4V,

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.

43.50 (1.71)

before display switches off.

METER

TVS ZENER DIODE

Martel Part Number: 80311

Digikey (www.digikey.com)

10.70

REAR VIEW

TVS DIODE

–

Part Number: 1N6287AGOS-ND

(0.42)

10.70

(0.42)

CAL

5.00

(0.20)

Reading when Vin > 25V.

Seal

Panel

2 wires - 30cm (12.0)

QM100V

21.75 (0.85)

EMV 1200-40

Module thickness: 5.5mm (0.22")

EMV

FITTING THE QM100V 1200-40

Drill a 5.5mm / 7 / 32 hole in the panel. Fit seal to the rear of the module. Fit the module to

the panel by passing its screw threaded stud and the wires through the hole, fitting the

Nut

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.

9.0

(0.35)

Washer

PO Box 770, Londonderry, NH 03053 1-800-821-0023

www.martelcorp.com

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