LASCAR DPM160 User Manual

DPM 160 4½ Digit LCD Module

A DPM offering levels of performance, low current consumption and compact size never previously available. Automatic low battery
indication and 'continuity' flags are built into the display. Supplied complete with snap-in bezel, the DPM 160 will suit many
applications calling for lowcost,highaccuracymeasurementsin portable instruments.

12.5mm (0.5“) Digit Height.

Programmable Decimal Points

Auto-zero

+

-

Auto-polarity

200mV d.c. or 2V d.c. Full Scale Reading (F.S.R.)

Digital Hold

Single Rail Version (DPM 160S)

Autoranging Outputs

SCALING

Two resistors RaandRb may be fittedinorder to alter the
full scale reading (F.S.R.) of the meter -seetable.
The meter will need re-calibration.

Required F.S.R. Range Input Ra Rb

200mV LOW (o/c) Link (o/c)
2V HIGH Link (o/c)
20V Note HIGH 910k 100k
200V Note HIGH 1M 10k
2kV Note HIGH 1M 1k
200 A LOW(o/c) Link 1k

µ

2mA 100R
20mA 10R
200mA 1R

NOTE

Ensure that Link La is open iffittingRa.

LOW(o/c) Link
LOW(o/c) Link
LOW(o/c) Link

Standard Meter DPM 160
Single Rail Version DPM 160S

Specification Min. Typ. Max. Unit

Accuracy (overall error) * 0.005 0.01 % (±1 count)
Linearity ±1 count
Sample rate 1.6 samples/sec
Operating temperature range 0 50** °C
Temperature s 30 ppm/°C
Supply DPM 160 6 9 14
(V+ to V-) DPM 160S 3 5 7
Supply current 1 mA
Input leakage current (Vin= 0V) 1 10 pA

* To ensure maximum accuracy, re-calibrate periodically.
**Above typically 35°C the display ’s viewing angle will progressively reduce, although

contrast should remain acceptable when viewed head-on.

tability

voltage

Stock Number

V

SAFETY

To comply with the LowVoltageDirective(LVD 93/68/EEC),inputvoltagesto the module’s pins mustnotexceed60Vdc.If voltages to the
measuring inputs doexceed60Vdc,then fit scaling resistorsexternally to the module.Theuser must ensure thatthe incorporation of the
DPM into the user ’s equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for
Measuring, Control and LaboratoryUse).

DIMENSIONS All dimensions in mm (inches)

8.20

1.10
(0.32)

25.0 (1.00)

(0.04)

6.7

(0.26)

8.00

(0.33)

Panel cut-out
57 x 27 (2.24 x 1.06)

1

4

REAR VIEW

2

ON BOARD
SOLDER LINKS

1

Rb
Ra

La

3

20

SCALING RESISTORS

60.0 (2.36)

30.0 (1.18)

52.0 (2.05)

V DISP

V-

DP4/OR

DP3/UR

L/H

120

CONT

COM

REF+

2.54 (0.10)

REF HI

IN HI

IN LO

V+

REF BG

REF-

REF LO

DGND

RANGE

CLOCK

DP2

DP1

0.50 (0.02)

PANELFITTING

Locate the meter by passing it through the front of the panel cut-out, and gently push until the rear of the bezel is flush with the panel (DO NOT
PUSH ON THE LCD). The snap-in lugs will now automatically hold the meter firmly in position.

LASCAR ELECTRONICS LTD.

MODULE HOUSE, WHITEPARISH,

TEL: [phone] FAX: [phone]

WILTSHIRE SP5 2SJ UK

E-mail: [e-mail]

LASCAR ELECTRONICS INC.

3750 West 26th Street,

TEL: [phone] FAX: [phone]

Erie, PA 16506 USA

E-mail: [e-mail]

LASCAR ELECTRONICS (HK) LIMITED

FLAT C, 5/FL., LUCKY FTY. bldg., 63-65 HUNG TO ROAD

KWUN TONG, KOWLOON, HONG KONG

TEL: [phone] FAX: [phone]

E-mail: [e-mail]

PIN FUNCTIONS

Note that'HI'meansV+(6) and'LO'means DGND(16). Four ofthepinsare input/output,featuring'weak'
outputs . To useit asan input,the outputiseasily overdriven. In orderto obtaintheoutput data,thepin
must beconnectedtoahigh impedanceinput.

1. DP4/OR Whenpulled HI,DP1.9999 willbeshown. If DP4 isnottobeused, connectitLO.

Input:
Output:
Note:

The outputwillgoHIif theresultexceeds ±19999.

If DP4istobeshown andtheO/R signalis tobesensed atthesame time,Pin1 should

be usedasaninputunder normalconditionsexcept duringL/H outputwhen theO/Rflag

CONTINUITY (11)

should besensed.

2. VDISP This inputsetsthedrivevoltage forthedisplay. It is internally linked toDGND.

3. DP3/UR When pulled HI,DP19.999will beshown. If DP3is nottobe used,connectit LO.

4. L/H When floating,theconverteroperatesin thefree-run(normal)mode. When pulledHI, thelastdisplayed readingisheld.

Input:
Output:
Note:

The outputwillgoHIif theresultis lessthan ±1000.

If DP3istobeshown andtheU/R signalis tobesensed atthesame time,Pin3 shouldbegated withtheL/H asdescribedbelow.

Input:
Output:

A negativepulseoccurswhenthe datainthe displaylatches isupdated.

5. V- Negative powersupply.

6. V+ Positive power supply.

7. REF- Negativesupplyforthe internalreference.

8. REF BG Output of the bandgapreference(1.22Vnom).

9. REF+ Positiveoutput frominternalreference.

10. COM The groundforthe analoguesectionof theA/Dconverter. Held actively at 3.2V(nom.)belowV+.

11. CONT If theconverterinputvoltagedrops belowanominal 200mV, thenthecontinuityannunciatorwill beshownand theoutput will
be HI. To disablethe continuityindicator,pin11should beheldLO.

12. IN LO Negative differential measuring input.

13. IN HI Positive differentialmeasuringinput.

Inputs mustbelowerthan1.0V belowV+,and higherthan 1.5VaboveV-.

14. REF HI Positive inputforreference voltage.

15. REF LO Negativeinputforreference voltage.

16. DGND DGNDis heldat between4.6and 6voltagebelow V+. This isthesupply voltagefor thedigitalsection. If CMOS logic isusedto

provide ordecodeDPM160signals, thenitcan bepowered fromV+and DGNDupto amaximumof 1mA.

17. RANGE This pinhasaninternal3mApull downandneed notbeconnected fora 200mVfullscale. For2Vfullscaleconnect HI.

18. DP2 Input for DP 199.99 Thesepinshavean internal3 Apulldownand neednotbe connectedif thedecimalpoints arenotto be

µ

19. DP1 Input for DP 1999.9 shown. To show the points,connecttoHI.

20. CLOCK Thisinputcanbe usedtooverridethe internalclockinorder tosynchroniseDPM 160withexternal systems.

WEAK OUTPUT

DP4/OR (1)
DP3/UR (3)

LATCH/HOLD (4)

500k

VARIOUS OPERATING MODES

ON-BOARD LINKS: In order to quickly and easily change operating modes for
different applications the meter has several on-board links. They are designed
to be easily opened (cut) or shorted (soldered). Do not connect more than one meter
to the same power supply if the meters cannot use the same signal ground.
Taking any input beyond the power supply rails will damage the meter.

+

-

1.5V
min.

+

+

V+

6

V+

13

IN HI

12

IN LO

V-

5

V-

V+

6

13

V+

IN HI

12

IN LO

-

14

REF HI

15

REF LO

-

V-

5

4

VV.

V-

V+

6

V+

13

+

INPUT
VOLTAGE

Check Links 1, 2,3&4areSHORTED

IN HI

12

IN LO

-

V-

5

V-

Measuring a floating voltage source
of 200mV full scale.

V+

6

V+

13

+

-

R=

Check Links 1, 2,3&4areSHORTED

IN HI

--

R

12

IN LO

0.2

I

FSR

V-

5

V-

Measuring current.
Supply MUST be isolated.

±200mV

0V

Check Links 1,3&4areSHORTED.

Split supply operation (DPM 160).

V1

V2

Measuring the ratio of two voltages.
200mV F.S.R. reading = 10 V /V

2V F.S.R. reading = 10

1/ 2

5

14V max
7V min

12

Normally
SHORTED
Cut to
OPEN

V+

6

V+

13

+

IN HI

12

INPUT
VOLTAGE

Check Links 1,3&4areSHORTED.

IN LO

V-

5

Measuring a single ended input
referenced to supply (DPM 160S).

V+

6

DP4

V+

O/R

DP3

U/R
L/H

V-

DGND

5

V-

16

Check Link REF is SHORT.

1

3
4

DP4 I/P

DP3 I/P

LATCH

LATCH

OPTIONAL
PULSE DELAY
MONOSTABLE

Driving DP3 and DP4 inputs while
monitoring under range and over
range outputs.

Normally
OPEN
Solder to
SHORT

V-

4013 +
4016

CK

CK

O/R
O/P

U/R
O/P

Specifications liable to change without prior warning DPM 160 Issue 7 May/2003 M.C. Applies to DPM 160/5