Transcript
DPM 343
3½ Digit LED Module
A high performance LED module offering more environmental protection than card types. True differential inputs and reference allow single ended, differential, ratio-metric or 'floating' measurements to be made. High efficiency LEDs behind a red filter produce an excellent high contrast display.
14.2mm (0.56) Digit Height Auto-zero Auto-polarity 200mV d.c. Full Scale Reading (F.S.R.) Bandgap Reference DIN Cased
SCALING
Two resistors R2 and R3 may be fitted in order to alter the full scale reading (F.S.R.) of the meter - see table. The meter will need re-calibrating by adjusting CAL.
Required F.S.R. 2V 20V 200V 2kV 200µA 2mA 20mA 200mA
R2
note note note note
DPM343
Specification
Accuracy (overall error)* Linearity Sample rate Operating temperature range Temperature stability Supply voltage Supply current
R3
910k 1M 1M 1M LINK LINK LINK LINK
Stock Number
Standard Meter
100k 10k 1k 100R 1k 100R 10R 1R
Min.
Typ. 0.05 3
0
30 5 100
Max. 0.1 ±1 50 5.5 200
Unit
% (±1 count) count samples/sec °C ppm/°C V mA
* To ensure maximum accuracy, re-calibrate periodically.
NOTE Ensure that link across R2 is OPEN.
CONNECTOR SOURCING GUIDE METHOD
LASCAR EC 16 DS
DIMENSIONS All dimensions in mm (inches) 17.0 (0.67)
7.00 (0.28)
69.0 (2.72)
54.0 (2.13)
36.0 (1.42)
18.0 (0.71)
72.0 (2.83)
Viewing Area showing display in TEST mode
D I S 4
D I S 1
D I S 4
D I S 1
Panel cutout 67.5 x 31.0 (2.66 x 1.18)
TOP VIEW
R3 R2
24.0 (0.94)
30.0 (1.18)
DPM 343
DP2
DP3 (RH) REF+
REF-
DP COM
DP1 (LH) REF LO
REF HI
TEST
REG IN
KEY REF BG
CLOCK
KEY
IN HI
COM
COM
IN LO
V- OUT
0V
0V
+5V IN
+5V OUT
65.5 (2.58)
53.5 (2.11)
UNDERSIDE OF BOARD
4
3
R2
2 1
Ø2.40 (0.09)
SCALING RESISTORS ON TOPSIDE OF BOARD
ON-BOARD SOLDER LINKS
LASCAR ELECTRONICS LTD.
MODULE HOUSE, WHITEPARISH, WILTSHIRE SP5 2SJ UK TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616 E-mail:
[email protected]
LASCAR ELECTRONICS INC.
LASCAR ELECTRONICS (HK) LIMITED
3750 West 26th Street, Erie, PA 16506 USA TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141 E-mail:
[email protected]
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:
[email protected]
PIN FUNCTIONS A. B, C. D. E. F, G. H. J. K. L. M. N. P. Q. R. 1. 2. 9. 12. 14. 15. 16.
+5V 0V VIN LO COM IN HI KEY CLOCK REF BG TEST REF HI REF LO REFREF+ REG IN +5V KEY DP COM DP1 DP2 DP3
Positive power supply input. Negative power supply input. Internally generated negative power supply, approx. -2.8V (max. load 1mA). Negative measuring input. The ground for the analogue section of the A/D converter, held actively at 2.8V (nom) below +5V. Positive measuring input. Polarising slot for edge connector. Corresponds to Pin 9. Connect to 0V to hold display reading. Output of bandgap reference (1.22V nom.). Connect to +5V to display all segments (except DPs). Display will read -1888. Positive input for reference voltage. Negative input for reference voltage. Negative output from on-board reference. Must be tied to a suitable ground return to bias bandgap (normally COM). Positive output from on-board reference (100mV). Positive input for 7.5 - 15V power supply option. +5V Rail - Internally connected to Pin A. Polarising slot for edge connector. Corresponds to Pin J. Connect to pin 14, 15 or 16 to display required decimal point. 1.999 19.99 199.9
Note - All unspecified pins have no required connection.
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).
VARIOUS OPERATING MODES
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. Analogue inputs must be no closer than 1V to the positive supply or lower than 1.5V below 0V.
VOLTAGE INPUT
+ -
+5V A +5V H IN HI N REF HI E IN LO R Q REF- REF+
IIN
6R2
P REF LO F
5k
COM 0V B
IOUT 0V
Floating Input.
+5V A H IN HI +5V L 100k REF BG N REF HI SET ZERO R REF+ E IN LO Q REFP REF LO F COM 0V B 0V
Measuring 4-20mA to read 0-999.
+5V A +5V H R
E IN LO F
R= 0.2 IFSR
IN HI
REF HI
COM
REF+
N
V1
V2
+ -
H
IN HI E IN LO N REF HI P REF LO 0V B
0V
Measuring Current.
Specifications liable to change without prior warning
-
R
P REF LO Q REF-
0V B
+
+5V A +5V
DPM 343
0V
Measuring the ratio of two voltages Reading = 1000 V1/V2. 50mV
