DPM 959B Datasheet by Lascar Electronics

LL. @ V ”I «-
DIMENSIONS All dimensions in mm (inches)
Stock Number
Standard Meter DPM 959B
+SEG POL
V+
TEST
IN HI
NC
COM REF HI
DP1
DP3
GND
VNEG
IN LO
REF LO
DP COM
DP2
61.5 (2.42)
51.0 (2.01) Ø5.7
(0.22)
24.5 (0.96)
24.2 (0.95)
39.0 (1.54)
Ø3.0
(0.12)
71.5 (2.81)
de
76.0 (2.99)
72.5 (2.85)
40.5 (1.59)
44.0 (1.73)
24.0 (0.94)
51.0 (2.01)
a
bc
Panel cut-out 72 x 40 (2.83 x 1.57)
Maximum panel thickness 3mm (0.12)
a. 1.0 (0.04)
b. 2.0 (0.08)
c. 6.5 (0.26)
d. 11.5 (0.45)
e. 8.4 (0.33)*
Specification Min. Typ. Max. Unit
Accuracy (overall error) * 0.1 % (±1 count)
Linearity ±1 count
Sample rate 2.5 samples/sec
Operating temperature range 0 50 °C
Warm-up time 10 minute
Temperature s 150 ppm/°C
Supply 4.75 5 5.25 V
Supply 50 90 mA
Input leakage current (Vin = 0V) 1 10 pA
* To ensure maximum accuracy, re-calibrate periodically.
tability
voltage (V+ to V-)
current
DPM 959B 3½ Digit LED Voltmeter
19mm (0.75“) Digit Height
Programmable Decimal Points
Auto-zero
Auto-polarity
200mV d.c. Full Scale Reading (F.S.R.)
This compact voltmeter is ideally suited to applications where excellent readability under all lighting conditions is required.
The meter is fitted with high efficiency LEDs which, together with the integral red filter, give a high contrast display with
19mm (0.75") digit height. The meter can be easily scaled by the user to indicate volts, amps or other engineering units and
may be used in single-ended, differential, ratiometric or floating input modes.
SCALING RESISTORS
ON TOP SIDE OF BOARD
ON-BOARD SOLDER LINKS
REAR
VIEW
SCALING
Two resistors Ra and Rb may be fitted on the module
in order to alter the full scale reading (F.S.R.) of the
meter - see table. The meter will need re-calibration
by adjusting the calibration potentiometer.
NOTE
Ensure that solder link 10 across Ra is OPEN.
Required F.S.R. Ra Rb
2V Note
1M 100R
200 A LINK 1k
2mA LINK 100R
20mA LINK 10R
200mA LINK 1R
910k 100k
20V Note 1M 10k
200V Note 1M 1k
2kV Note
m
www.lascarelectronics.com
REAR
VIEW
11
POL
1
DE 27310
Rb
Ra
DP3
DP2
DP1
1
1
16
16
12
21.5 2.54 pin pitch
2.54 pin pitch
SAFETY
To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed 60Vdc. If
voltages to the measuring inputs do exceed 60Vdc, then fit scaling resistors externally to the module. The user must ensure
that the 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 Laboratory Use).
Specifications liable to change without prior warning DPM 959B Issue 12 06/2010 S.L. Applies to DPM 959B/1
*typical depth of tallest component behind PCB,
this dimension is for guidance only.
No.:695 - Page 1 of 2
VARIOUS OPERATING MODES
ON-BOARD SOLDER LINKS: In order to quickly and easily change operating
modes for different applications the meter has several on-board solder 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.
PIN FUNCTIONS
1. +SEG Use to indicate positive polarity- see "VARIOUS OPERATING MODES" for details.
2. POL To completely disable the negative polarity sign, cut solder link POL.
3. GND Negative power supply connection (0V).
4. V+ Positive power supply connection (+5V).
5. V NEG Output from negative rail generator (-5V nom). This is an inversion of V+.
6. TEST When taken to V+ all segments, except decimal points, should light i.e. "1888".
7. IN LO Negative measuring input. Analogue inputs must be no closer than 1.5V to the positive or negative supply.
8. IN HI Positive measuring input. The negative supply is generated internally and mirrors the positive supply voltage.
9. COM Ground for analogue section of the A/D converter, it is actively held at 3.05V below V+ and must not be allowed to sink
excessive current (>100 A) by, for instance, connecting to a higher voltage.
10. NC Do not connect.
11. REF LO Negative input for reference voltage. (Connected via Link 3 to COM.)
12. REF HI Positive input for reference voltage. (Connected via Link 1 to internal reference.)
13. DP COM Connect to Pins 14, 15 or 16 to illuminate the required decimal point, alternatively use the on-board solder links DP1, 2 or 3.
14. DP1 Connect to Pin 13 to display DP1 (199.9).
15. DP2
16. DP3
m
Connect to Pin 13 to display DP2 (19.99).
Connect to Pin 13 to display DP3 (1.999).
1. Normally closed. Open this link to disable the internal reference. Then apply an external reference to REF HI (pin 12).
2. Normally open. Close this link to connect IN LO (pin 7) to COM (pin 9).
3. Normally closed. Open this link to disconnect COM (pin 9) from REF LO (pin 11).
7. Normally open. Close this link connect IN LO (pin 7) to GND (pin 3).
10. Normally closed. Open this link when fitting scaling resistor Ra.
DP1-2-3. Normally open. Close one of these links to display decimal points DP1 (199.9), DP2 (19.99) or DP3 (1.999) respectively.
POL. Normally closed. Open this link to disable the polarity sign. See Pin Functions 1 and 2 above.
SOLDER LINKS
10K
10K
BC307
+SEG
(Pin 1)
0V
(Pin 3)
1K0
BC307
1K5
POL
(Pin 2)
+4.75 to +5.25V
(Pin 4)
V+
V+
V+
4
4
4
9
8
8
12
8
7
7
11
7
V1
V2
IN HI
IN HI
REF HI
IN HI
IN LO
IN LO
REF LO
IN LO
IOUT
6R2
220k
5k Set
Zero
IIN
COM
3
3
3
GND
GND
Input
Voltage
GND
+
+
+
-
-
-
Check solder link 2 is SHORTED.Check solder link 2 is OPEN.
Check solder links 1 & 3 are OPEN.
Measuring 4-20mA to read 0-999
(supply MUST be isolated).
Operation with input floating
with respect to power supply.
Measuring the ratio of two voltages.
Reading = 1000 V /V
50mV< V <200mV
V <2V .
12
2
12
The above circuit can be used to
indicate both positive and negative
polarity, by illuminating either the
+ or - segment on the meter.
+4.75 to +5.25V +4.75 to +5.25V +4.75 to +5.25V
+4.75 to +5.25V+4.75 to +5.25V
0V 0V
0V0V
0V
V+
4
7
8IN HI
INPUT
VOLTAGE IN LO
3
GND
+
-
Check solder link 2 is OPEN.
Operation with input referenced to panel
meter supply (Single ended mode).
Preferably link IN LO to GND at signal
source (to reduce loop noise), otherwise
make link 7.
Measuring current.
Supply MUST be isolated.
Check solder links 2 & 3 are SHORTED.
8
GND
V+
4
3
7
R
R= 0.2
IFSR
IN HI
IN LO
Normally
SHORTED
Cut to
OPEN
Normally
OPEN
Solder to
SHORT
Specifications liable to change without prior warning DPM 959B Issue 12 06/2010 S.L. Applies to DPM 959B/1
LASCAR ELECTRONICS LTD.
MODULE HOUSE,
WHITEPARISH,
WILTSHIRE SP5 2SJ,
UK
TEL: +44 (1794) 884567
FAX: +44 (1794) 884616
E-mail: sales@lascar.co.uk
LASCAR ELECTRONICS INC.
4258 WEST 12th STREET,
ERIE,
PA 16505,
USA
TEL: +1 (814) 835 0621
FAX: +1 (814) 838 8141
E-mail: us-sales@lascarelectronics.com
No.:695 - Page 2 of 2
LASCAR ELECTRONICS (HK) LTD.
8th FLOOR, CHINA AEROSPACE CENTRE,
143 HOI BUN ROAD,
KWUN TONG, KOWLOON,
HONG KONG
TEL: +852 2389 6502
FAX: +852 2389 6535
E- mail: saleshk@lascar.com.hk