DMS-20PC-0/5 View Datasheet(PDF) - DATEL Data Acquisition products
Part Name
Description
MFG CO.
DMS-20PC-0/5
DATEL Data Acquisition products
'DMS-20PC-0/5' PDF : 4 Pages View PDF
DMS-20PC-0/5
0 - 5 V I N P U T, 3½ D I G I T, L E D D I S P L AY P R O C E S S C O N T R O L M O N I TO R S
Performance/Functional Specifications
Typical at TA = +25°C, unless otherwise noted.
Input
Full Scale Input Range ➀
Input Impedance
Overvoltage Protection ➀
Performance
Sampling Rate
Accuracy (1 minute warm-up)
Temperature Drift (0 to +60°C)
Display
Display Type and Size
Polarity Indication
Overrange Indication
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (Non-condensing)
Case Material
Weight
Power Supply Requirements
DMS-20PC-0/5-5RS
DMS-20PC-0/5-5GS
DMS-20PC-0/5-5RL
DMS-20PC-0/5-5RH
DMS-20PC-0/5-24RL
Min.
4.9
100
--
Typ.
5.0
--
--
Max.
5.1
140
±40
Units
Volts
kΩ
Volts
2.5 samples per second
±0.05%FS ±1 Count
— ±0.15 ±0.3 Cnts/°C
3½ Digit LED, 0.37"/9.4mm high
"–" for negative readings
"–1_ _ _ " for negative inputs
"1_ _ _ " for positive inputs
0
—
+60
°C
–40
—
+75
°C
0
—
95
%
Polycarbonate
0.6 ounces (17 grams)
+4.75V to +5.25V at 90mA max.
+4.75V to +5.25V at 120mA max.
+4.75V to +5.25V at 15mA max.
+4.75V to +5.25V at 90mA max.
+4.75V to +40V at 15mA max.
➀ The DMS-20PC-0/5 can also be used in most 0-10V applications. See the section
on 0-10V inputs for more information. See Note 3 on Table 1.
➁ INPUT LO (TB1 "–LO") is internally connected to the power return (TB2 "–V").
Overvoltage specifications apply to the INPUT HI (TB1 "+HI") connection.
Ordering Information
DMS-20PC-0/5-5RS
DMS-20PC-0/5-5GS
DMS-20PC-0/5-5RL
DMS-20PC-0/5-5RH
DMS-20PC-0/5-24RL
DMS-BZL3
DMS-BZL4
DMS-20-CP
+5V supply, standard-intensity red LED's
+5V supply, standard-intensity green LED's
+5V supply, low-power red LED's
+5V supply, high-intensity red LED's
+5V to +40V supply, low-power red LED's
Bezel assembly
Bezel assembly with sealing gasket
Panel cutout punch
Note: Standard panel-mount applications MUST use either DMS-BZL3 or
DMS-BZL4 bezel assemblies. See Mechanical Specifications section for
cutout/drill dimensions.
Order on-line at www.datel.com
Technical Notes
1. Input Configuration: The DMS-20PC-0/5 has its input low terminal
(TB1 "LO") internally connected to the power supply ground terminal
(TB2 "–V"). This connection effectively places the meter's input in a
single-ended configuration. In some applications, single-ended inputs
can cause ground-loop induced errors (the meter's display becomes
unstable or bounces). This occurs because the LED drive currents
flow through both the –V terminal and the signal LO terminal.
If suspected ground-loop errors are encountered, and the input signal
LO terminal is externally connected to –V somewhere else in the
system, try removing the connection to TB1 "LO". Inputs which have
no ground-return connection to –V (commonly referred to as "floating
inputs") must have their most negative potential tied to TB1 "LO".
Please consult DATEL for more information.
Applications which require electrical isolation between the input
signal source and the system power supply must use a separate
transformer-isolated supply to power the meter.
2. Panel Mounting: In most standard through-the-panel installations,
the DMS-20PC-0/5 must be secured to the panel with either DMS-
BZL3 or DMS-BZL4 optional bezel assemblies (see the Mechanical
Specifications section and the Ordering Guide for more information).
The metal retaining clip supplied with other DMS-20 Series meters
CAN NOT be used to support the DMS-20PC-0/5.
Operating and Setup Instructions
As shipped, the DMS-20PC-0/5 is factory calibrated to read
"000" for a 0.0V input and "1999" for a 5.0V input. The following
worst-case procedure assumes the DMS-20PC-0/5 is com-
pletely mis-adjusted, i.e., both potentiometers and the DIP
switches are randomly set.
1. Set R7 (full scale span/gain adjust) and R3 (zero/offset
adjust) fully clockwise, roughly 22 turns, and place SW1-
SW8 to OFF (down position).
2. Select DIP switch setting #1 in Table 1.
3. Apply a precision 0.0V input and adjust R3 until the meter's
display reads "000".
4. Apply a precision 5.0V input and adjust R7 until the meter's
display reads "1999". Repeat steps 3 and 4 to make sure the
adjustments do not affect one another.
5. Select the appropriate decimal point by setting SW6, SW7 or
SW8 to ON (DP1, DP2 or DP3 respectively).
NOTE: The "000" to "1999" display readings referred to in
the instructions above are for illustrative purposes only. If
other display readings such as "000" to "1200" are desired,
refer to the DIP-Switch Settings Tables for SW1-SW4
settings. (SW5 is reserved for future use, it has no affect on
display operation.) The initial setting of R3 and R7 fully
clockwise is recommended in the adjustment procedure for
all the following examples.
2
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