digital panel modules
user guide
OEM33 & OEM33H 3.5 digit LCD digital voltmeter
features
3.5 Digit 10mm character height LCD
200mV Full Scale sensitivity
Automatic zeroing and polarity indication
11 selectable annunciators
Easy to use decimal point selection
Built in snap fastener
Display on hold option OEM33H
DESCRIPTION
The OEM33 (also known as the VK1000) is one of the
world's smallest digital voltmeters. It is an ideal
replacement for analogue meters with advantages of
accuracy, size and easy mounting. The module includes
an A/D converter, LCD display of 10mm character height,
and plastic housing with standard dual in line pin
terminals for easy insertion into sockets or PC Board.
ELECTRICAL CHARACTERISTICS T
A
=25
O
C隆
CHARACTERISTIC
Supply voltage (VDD)
Supply Current (IDD)
Full scale
Input Impedance
Reference Voltage
Overload voltage
9 Volts
100
100
20
0
9 Volts
5 Volts
9 Volts
5 Volts
+2
+2
+1
+1
100
70
100
150
+1
+4
+4
+2
+2
CONDITION
9 Volts
5 Volts
9 Volts
5 Volts
MIN
7
4.5
TYP
9
5
100
2
MAX
10
6
500
3
199.9
UNITS
V
V
碌A(chǔ)
mA
mV
M
鈩?/div>
mV
V
Counts
Counts
Counts
Counts
Counts
碌V
dB
ppm/
o
C
DIMENSIONS
mm
Zero I/P Reading
Accuracy
at FSD
Linearity
Resolution
CMRR
Temp Coefficient
Panel cut out 40.5 x 22.5
Fastening clips accept panel thickness 0.9 to 3.2mm
PIN FUNCTIONS
VDD
VSS
GD
Positive supply terminal
Negative supply terminal for 9 volts operation
Negative supply terminal for 5 volts operation
Input high terminal
Input low terminal
Reference high input terminal
Reference low input terminal
Connect to VDD for hold and GD for continuous
Analogue Common
For driving annunciator
LCD back plane
Decimal point pins . D1 = .000, D2 = 0.00 D3 = 00.0
The decimal point will appear if the corresponding
terminal is connected to XBP.
OPERATING SPECIFICATION
Operating temperature
Storage temperature
Operating relative humidity
0 to 50
O
C
-20 to 70
O
C
80%
IH
IL
RH
RL
HOLD1
C
XBP
BP
D1, D2, D3
OEM33H - VERSION WITH DISPLAY HOLD FACILITY
This module is a version of the OEM33 featuring a digital
display hold facility. For normal, continuous operation
connect the 'Hold 1' pin to the GD pin. To hold the present
reading, connect 'Hold 1' to VDD. Do not leave this pin
floating or it will drift in and out of hold mode.
ORDERING INFORMATION
OEM33
3.5 digit, 200mV LCD Voltmeter
OEM33H
Revision - 8 22/06/00
BAT,
o
C,
o
F,~,
m,
碌,
M鈩? K鈩? Annunciators
V, A, HOLD2
3.5 digit, 200mV LCD with display hold
@@FBCREATE 0001, OEM33/H Data Sheet@@
All annunciators not in use must be connected to the BP
pin for suppression purposes. To light up an annunciator,
connect the corresponding pin to XBP.
1
2
