2
7
A loop powered indicator giving an accurate, zero corrected indication of 4-20mA loop current.
Calibration is by two 20-turn cermet potentiometers which allow sensitive adjustment of the
instrument. The meter is housed in a robust carrier, which can be bolted in place or panel
mounted using the low profile bezel and clips provided.
• 19mm (0.75“) Digit Height
• Low Volt Drop
• Programmable Decimal Points
• Simple Screw Terminal Connections
CUSTOM SCALING
SAFETY
TERMINAL FUNCTIONS
CALIBRATION
VARIOUS OPERATING MODES
For alternative scaling to the standard 0 - 1000, cut Link 8 and short Link 7. Add two
resistors R12 and R13 which will set the basic scale of the meter. The highest
practical value for the R12 and R13 series combination is 12R. To select your desired
scaling, use the following formula:
R12 + R13 =
160
Re-calibrate as necessary.
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).
1. I+
Positive current input.
2. I-
Negative current input.
3. DP3
1.000
4. DP2
10.00
Decimal point inputs.
5. DP1
100.0
6. DS
Decimal Point select. Connect to required DP input to display decimal point.
The meter is supplied calibrated to read 000 for 4mA loop current and 1000 for 20mA.
To re-calibrate:
1. Apply 4mA to I+/I- and adjust 'OFFSET' to read 000.
2. Apply 20mA and adjust 'SPAN' to read 1000.
3. Repeat steps 1 and 2 until there is no more adjustment of 'SPAN' and 'OFFSET' required to give desired readings.
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).
The DPM 942 is powered from the 4-20mA signal loop and needs no other power supply.
Ensure correct polarity when connecting.
Full Scale reading at 20mA
DP2 selected in this example.
Dans cet exemple DP2 est activé.
Für dieses Beispiel wurde DP2 ausgewählt.
Nell'esempio è stato selezionato il DP2.
Transmetteur
4-20mA
4-20mA
Transmitter
4-20mA Sender
Trasmettitore
a 4-20 mA
GB
F
D
I
I+
I+
I-
I-
1
2
DP2
DS
DPM 942
4
6
D
D
I
I
F
F
GB
GB
PANEL FITTING
INSERTION DANS UN PANNEAU
EINBAUHINWEISE
MONTAGGIO SU PANNELLO
VARIOUS OPERATING MODES
EXEMPLE DE MODES D’UTILISATION
VERSCHIEDENE BETRIEBSARTEN
VARIE MODALITÀ DI FUNZIONAMENTO
Normally SHORTED
Cut to OPEN
Normally OPEN
Solder to SHORT
PCB
R25
R11
R12
R13
R14