DPM 500-BL 3½ Digit Backlit LCD Module
The DPM500-BL uses advanced components and construction techniques to provide a uniquelycompact unit. The meter is in a40 pinDIL
integrated circuit formatthat can be pluggeddirectlyinto a DILsocketor panel mounted usingthe snap in bezel.
12.5mm (0.5“) Digit Height
Programmable Decimal Points
Auto-zero
Auto-polarity
200mV d.c. Full Scale Reading (F.S.R.)
+
-
°°
CF
µA
mV
kΩ
MHz
LED Backlit
Annunciators
SCALING
Two resistors Ra andRb may befitted in orderto alter the
full scale reading(F.S.R.) ofthe meter - see table.
Meter will needre-calibration.
Required F.S.R. Ra Rb
2V Note 910k 100k
20V Note 1M 10k
200V Note 1M 1k
2kV Note 1M 100R
200 A 0R 1k
µ
2mA 0R 100R
20mA 0R 10R
200mA 0R 1R
NOTE
Ensure link 10is cutif fitting Ra.
Backlit Version DPM 500-BL
Specification Min. Typ. Max. Unit
Accuracy (overall error)* 0.05 0.1 % (±1 count)
Linearity ±1 count
Sample rate 3 sample/sec
Operating temperature range 0 50 °C
Temperature stability 100 ppm/°C
Supply voltage 7.5 9 14 V
Supply current 150 A
Backlight voltage 5 V
Backlight current 30 60 mA
Input leakage current (Vin = 0V) 1 10 pA
* To ensure maximum accuracy, re-calibrate periodically.
Stock Number
µ
CONNECTOR SOURCING GUIDE
METHOD 40 Pin DIL IC Socket
SAFETY
To complywiththe Low Voltage Directive (LVD93/68/EEC), input voltages tothe module’s pins mustnot exceed 60Vdc. If voltagesto the
measuring inputs doexceed60Vdc, then fitscaling resistors externally tothe module. Theuser must ensurethat the incorporationofthe
DPM into the user ’s equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for
Measuring, Control andLaboratory Use).
DIMENSIONS All dimensions in mm (inches)
1.1
8.2
(0.04)
60.0 (2.36)
(0.32)
30.0 (1.18)
5.0
(0.19)
8.5 (0.33)
1
-
+
40
1.87
(0.07)
V
m
V+
Ω
Hz
V+
A
TEST
REF
°F
°C
HI
REF
7
µ
LO
REF+
0.5
(0.02)
52 (2.05)
12
REF-
COM
IN HI
IN LO
M
BG
-5V
2.54
(0.1)
E3
AB
XB3
POL
21
15.2 (0.60)
V-
DP1
DP2
DP3
XDP
24.8 (0.98)
BP
XG3
4.8
(0.19)
20
:
-
K
~
www.lascarelectronics.com
PANELFITTING
Fit the bezel to the front of the
panel andlocate the meter into
the bezel from behind.
45.0 (1.77)
16.0 (0.63)
Display in TEST mode
4.0 (0.16)12.1 (0.48)
9
1
13
-
+
40
12
3
2
10
1
Rb Ra
12
7
5
4
7
11
15
14
REAR VIEW
Panel cut-out = 57 x 27 (2.24 x 1.06)
Alternatively the meter and
bezel may be assembled before
fitting to the front of the panel
but care must be taken not to
use excessive force. Finally fit
the window into the front of
the bezel.
20
8
21
ON-BOARD LINKS
OPTIONAL SCALING
RESISTORS
LASCAR ELECTRONICS LTD.
MODULE HOUSE, WHITEPARISH,
TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616
WILTSHIRE SP5 2SJ UK
E-mail: sales@lascar.co.uk
LASCAR ELECTRONICS INC.
3750 West 26th Street,
TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141
Erie, PA 16506 USA
E-mail: us-sales@lascarelectronics.com
LASCAR ELECTRONICS (HK) LIMITED
FLAT C, 5/FL., LUCKY FTY. bldg., 63-65 HUNG TO ROAD
KWUN TONG, KOWLOON, HONG KONG
TEL: +852 2797 3219 FAX: +852 2343 6187
E-mail: b4lascar@samsongroup.com.hk
PIN FUNCTIONS
1, 40. V+ Positive powersupply.
2 -7, 12-14, 17, 38, 39 See
15. - Input for the polarity annunciator. Internally linkedto POL(pin 20). If thisistobeexternallycontrolled,cutlink11.
16, 18, 19, 22 XB3, E3, AB, XG3. Outputs for use in auto-rangingapplications.
20. POL Drivefor"-"annunciator. Internallyconnectedbylink11.
21. BP LCD backplanedrive waveform.
23. DP3 1.999
24. DP2 19.99 See
25. DP1 199.9
26. V- Negative powersupply.
27. XDP Connecttorequiredannunciators/DPs(see note).
28. -5V Notconnected.
29. BG Input for bandgap reference. (1.22V nom).
30. IN LO Negative measuring input. Analogue inputs must be no closer than 1V to either thepositive ornegative supply.
31. IN HI Positivemeasuring input.
32. COM The ground for the analogue section of the A/D converter,held activelyat 2.8V(nom)belowV+. COMmust not be allowed to sink
33. REF- Negative output from internal reference.
34. REF+ Positive output from internal reference.
35. REF LO Negative input for reference voltage.
36. REF HI Positiveinput forreference voltage.
37. TEST Connecting this pin to V+ turnson thesegmentsasillustrated. Itshouldnotbe operated for more than a few seconds as the DC
40. V+/CLK NormallytiedtoV+viaLink12butcan be used to over ride the internal oscillatorand controlthe sampleratebycuttingLink12and
LED BACKLIT VERSIONS:
E.g. For9Vuse150R. Maximum current =60mA.
ANNUNCIATORS:
‘floating’, under certain conditionsthey may appear when not wanted. To suppress unwanted annunciators, link them to the backplane (BP). If the
annunciators are being switched,connect themvia a1M resistorto theBP (pin21). The annunciators will then operate normally when connected to
XDP. Ensurethat anannunciatorisnotconnecteddirectlytothe XDP and BP at the same time.
SPECIAL NOTE: ANNUNCIATORS.
SPECIAL NOTE: ANNUNCIATORS.
Analogue inputs must be no closer than 1V to either thepositive ornegative supply.
excessivecurrent(> 100 A) by connecting it directly to a highervoltage.
µ
voltage applied to the LCD may "burn" thedisplay. Thispin is nominally at 5V below V+ and is the ground forthe digitalsection
of the meter,it canbe usedas anegativesupplytopowerexternallogicup to a maximum of 1mA.
making Link 13.
Apply 5V DC to thebacklight tabonthe side of the meter. Typical current is30mA. Forhigher voltages, fit a resistorin series.
The DPMannunciators (DPs, °C,etc.) can be displayed by connecting them to XDP. However as these annunciators are normally
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 powersupply railswill damage the meter.
V+
1
V+
31
+
±200mV
Links 1, 2,3&4SHORTED.
IN HI
30
IN LO
-
V-
26
V-
Measuring a floating voltage
source of 200mV full scale.
V+
1
V+
31
IN HI
R
R=
30
0.2
FSR
I
Links 1, 2, 3, 4 SHORTED.
IN LO
V-
26
V-
Measuring current
(supply MUST be isolated).
±200mV
+
-
0V
1V min
Links 1, 3 & 4 SHORTED.
Split supply operation.
+
V1
-
+
V2
-
Measuring the ratio of two voltages.
Reading = 1000 V /V
50mV< V <200mV
V <2V .
2
12
30
31
31
30
36
35
IN HI
IN LO
IN HI
IN LO
REF HI
REF LO
12
V+
V-
V+
V-
1
26
V+
1
26
V-
V+
14V max
7V min
V-
Normally
SHORTED
Cut to
OPEN
IIN
220K
6R2
5K
IOUT
Links 1,3&4SHORTED.
1
V+
31
IN HI
30
IN LO
32
COM
V-
26
Measuring 4-20mA to read 0-999
(supply must be isolated).
Normally
OPEN
Solder to
SHORT
V+
V-
Specifications liable to change without prior warning DPM 500-BL Issue 6 August/2002 M.C. Applies to DPM 500/7