Martel Electronics QM120ET User Manual

QM 120 ET Nema 4 SingleHoleMountingElapsedHourMeter

QM 120ET isaneasytomountLCDdigitalelapsedhourmeter.Themodulefeatures9999.9and99999hourranges,resultingin1/10hourand1hourresolution
respectively.Aleadingzeroblankinginputisprovided,allowingtheusertoswitchoffunwantedleadingzeros.Themoduleincorporatesanoutputwhich
pulseshighaftereveryhourcounted.Thisisparticularlyusefulinapplicationswheremaintenanceorinspectionarerequiredatregulartimeintervals.The
timerfeaturesTripandTotalranges.TheTriprangecanberesettozero.Tomounttheunitintoapanel,theuserneedonlydrillasingle5.5mm/hole.The
moduleisfittedtothepanelbylocatingitsscrewthreadedstudthroughthehole,fittingthewasherandtighteningthenutprovided.Themodule's8
connectingwirespassthroughthehollowstudintothetargetapplication,wheretheycanbeeasilyconnectedasrequired.Arubbersealisincluded,
providingsplashproofprotectionfortheunitwhenfittedtothemeterduringinstallation.

SingleHoleMounting

7

"

/

32

9999.9and99999HourRanges

TRIP

TOTAL

Hrs

9mm/0.35"LCDDigitHeight

ResetandTrip/TotalInputs

--------------------

LeadingZeroBlankingInput

PulseOutputEveryHour

ShownActualSize

Splashproof

StockNumber

EasyMountingElapsedHourMeterQM 120 ET

Seal

Elapsed

HourMeter

9.0

(0.35)

Panel

Nut

Washer

8Wires-30cm(12.0)

SpecificationMin.Typ.Max.Unit

ResolutionRange9999.90.1Hour

Accuracy*±2±6Sec./24Hrs.
Operatingtemperaturerange050°C
Supplyvoltage(V+)527Vd.c.
Supplycurrent1.5mA
InputLowVoltage(V**00.5V
InputHighVoltage(V***2V+V

*Baseduponconstantrunning.Thereispotentialfor±2secondserroreachtime

themoduleispowereddownandthenupagain.Overtime,theaccumulatederror

approximatestozero.
**Appliestotheinputs:Range,V-Sense,LZB,ResetandTrip/Total
***AppliestoV-Senseinputonly.

Range999991Hour

IL)

IH)

SAFETY

TocomplywiththeLowVoltageDirective(LVD93/68/EEC),inputvoltagestothemodule’swiresmustnotexceed60Vd.c.Theusermust
ensurethattheincorporationofthemeterintoequipmentconformstotherelevantsectionsofBSEN61010(SafetyRequirementsfor
ElectricalEquipmentforMeasuring,ControlandLaboratoryUse).

DIMENSIONSAlldimensionsinmm(inches)

LCDshowninpower-onself-testmode.

10.70
(0.42)

10.70
(0.42)

TRIP

21.40(0.84)

--------------------

REARVIEW

21.75(0.85)

Modulethickness:5.5mm(0.22")

TOTAL

43.50(1.71)

Hrs

5.00
(0.20)

21.75(0.85)

CONNECTION

0Black0V
1Brown9999.9/99999
2RedV+
3OrangeVoltageSense
4Yellow1HrPulse
5GreenLeadingZeroBlanking
6BlueReset
7VioletTrip/Total

FITTINGTHEHourMeter

Drilla5.5mm/"holeinthepanel.Fitsealtotherearofthemodule.
thepanelbypassingitsscrewthreadedstudandthewiresthroughthehole,fittingthe
washerandspringwasherandtighteningthenutprovided.Takecarenottotrapanyof
theconnectingwires.Do

DONOTPULLTHEWIRESANDDONOTALLOWSCREWTERMINALSOROTHER
WIRESTOHANGFROMTHEMODULE'SWIRES,ASTHISMAYDAMAGETHE
PRODUCT.

7

/

32

notovertightenthenutasthismaydamagethemeter.

Fitthemoduleto

Martel Electronics, Corp. P.O. Box 770 Londonderry, NH 03053
Toll Free: [phone] Phone: [phone] Fax: [phone]

WIRE FUNCTIONS

0. Black 0V Negative power supply connection.

1. Brown RANGE Do not connect for 99999 Hour range.

2. Red V+

3. Orange V-SENSE Connect to V+to start/continue counting elapsed hours.

4. Yellow PULSE Normally at 0V,thisoutputgoesHigh(+3.3V)every100hourinterval in TRIP mode.

5. Green LZB Do not connect to display leading zeros.

6. Blue RESET Connect momentarily to 0V to reset the display to zero (internally connected to V+ via pull-up resistor).

7. Violet TRIP/TOTAL Do not connect for TOTALmode operation.InTOTAL mode, the elapsed hour meter cannot be reset to zero.

Connect to 0V for 9999.9 Hour range.
Positivepower supplyconnection.

Connect to 0V or do not connect to read TRIP or TOTALvalue withoutcounting elapsedhours.

Connect to 0V to blank all leading zeros.
When reading is 0000.0 or 00000, leading zeros are not blanked.

Connect to 0V for TRIP mode operation. In TRIP mode, the elapsed hour meter can be reset to zero.

Warning : Do not connect the following wires to V+: RANGE, PULSE, LZB, RESET, TRIP/TOTAL, as this may

damage the meter. The user must incorporate suitable protection circuitry in applications where
the voltage to any of the meter's wires can exceed 27V d.c., including transient conditions, else
damage to the meter may occur. In particular, for applications in harsh electrical environments,
e.g. automotive, suitable external protection must be provided to protect against "load dump"
conditions, transients, etc.

DISPLAY FUNCTIONS

8888.8 The 5 digit readout displays elapsedtime inhours.

TRIP
TOTAL

----------

This symbol is displayed when trip mode is selected (see WireFunctionsabove)
This symbol is displayed when total mode is selected (see WireFunctionsabove)
The 10-segment incrementing bar indicates that the module is working correctly and counting hours.

APPLICATIONS

Basic 3-wire operation:

- 99999 Hour range

- Leading Zeros are displayed

- Timing in TOTAL mode
Open S1 to read TOTAL value
without counting hours.

TRIP TRIP

-

Orange

S1

Red Orange

TOTAL

Hrs

Black

0V

Red

Hrs

V+

V+

RedOrange

TOTAL

Hrs

-

Black

Green

S1

Leading zeros blanked.
Close S1 to select TRIP mode.

Red

Orange

Hrs

V+

Violet

0V

V+

LED

R

Yellow

-

Brown

Black

9999.9 Hour range

- Leading Zeros are displayed

- Timing in TRIP mode

SpecificationsliabletochangewithoutpriorwarningQM 120 ET Issue6September/200. AppliestoQM 120 ET

Violet

0V

Using the PULSE O/P to drive an LED.
The LED will illuminate once after every hour.

Black

-

Brown

Violet

0V