- AC or DC Powered with Dual Alarms
- DC Powered with Dual Alarms and Analog Output
- Ranges between 15 psi and 3000 psi
- Normal or Reverse Acting Alarms
- Hi/Lo, Hi/Hi, or Lo/Lo Alarms available
- Colored LED Alarm Status Indicators
Using the DPG1000ADA andDPG1000DAR Alarm OutputsNormal (Fail-safe) vs. ReverseAction—The convention for alarmaction is that with the normal orfail-safe configuration, the alarmoutput relays will be CLOSED (relayenergized) for a clear or non-alarmcondition and OPEN (relay notenergized) for an alarm condition.This is primarily for users whorequire an alarm condition ifthe gauge loses power or suffers acatastrophic failure. In the wiringdiagrams, the normally closed andnormally open designations refer tostandard relay terminology (i.e., therelay contact status with the relaycoil not energized).Therefore, with the normal(fail-safe) configuration in a greenor non-alarm condition, the relaywill be energized so that continuitycan be expected between thecommon and normally open leads.In a red or alarm condition, the relaywill be open (not energized) sothat continuity can be expectedbetween the common and normallyclosed leads.
Contact Rating and ProtectionThe contacts of the alarm relaysare rated at 1 A/24 Vdc or 0.5 A/115 Vac. Switching loads greaterthan the rating, or switching largeinductive loads, will shorten theuseful life of the contacts. In lowlevelswitching or with dry contacts,the user should consider whetherexternal contact protection, suchas snubber networks or arcsuppression networks, is requiredto protect the contacts.In addition, no internal fusing isincluded in the DPG1000 contactcircuits. The circuit external to thegauge alarm outputs should befused by the user in applicationsin which good design dictatesthis practice.
Using the DPG1000DARAnalog OutputThe analog output is easy to useif a few system considerations areobserved. The DPG1000DAR is DCpowered, with the gauge powersupply (–) tied to the 4 to 20 mA (–).Therefore, the DC supply (–) leadshould be considered common withregard to the analog output(–) or ground connection in theuser’s system.Be sure to observe the outputcompliance (voltage drive)capabilities of the gauge. Thecompliance, and therefore themaximum loop resistance the outputcan drive, is a function of the supplyvoltage to the gauge. Consult themanual for maximum loopresistance vs. supply voltage. Toolarge a loop resistance will causethe gauge output to “limit”or saturate before reaching its full20 mA output.
DPG1000ADA AC/DC Powered with Dual Alarms
SPECIFICATIONS
Accuracy: ±0.25% FSO or better, ±1 least-significant digit (includes linearity, hysteresis, repeatability)
Controls and Location: Display zero/span, non-interactive, ±15% range; setpoint 1 and setpoint 2, 0 to 100% range; top-accessible, multiturn potentiometers
Alarm Deadbands (Hysteresis): 1% of FSO, standard
Alarm Outputs: Dual form “C” (SPDT) relay contacts; individual setpoint 1 and setpoint 2 settings via top-accessible multiturn potentiometers; high/low alarm configuration standard, others available; relay contacts rated 1 A/24 Vdc, 0.5 A/115 Vac, non-inductive
Alarm Indicators: Bicolor (red/green) LEDs on front panel
Test Function: Front-panel TEST button, when depressed, toggles both SP1 and SP2 alarm status, independent of pressure input, to allow testing of system operation
Alarm Response Time: 100 ms typical
Power: Any AC source of 8 to 24 Vac, 50/60 Hz, or any DC source of 9 to 32 Vdc, 1.0 W maximum; optional wall-mount power supply available to operate on 115 Vac (DPG1000-PS)
DPG1000DAR DC Powered with Dual Alarms and 4 to 20 mA Output
SPECIFICATIONS
Accuracy: ±0.25% FSO or better, ±1 least-significant digit (includes linearity, hysteresis, repeatability)
Controls and Location: Display zero/span, non-interactive, ±15% range; setpoint 1 and setpoint 2, 0 to 100% range; test calibration level, 0 to 100% range; top-accessible, multiturn potentiometers analog output zero/span; internal potentiometers
Alarm Deadbands (Hysteresis): 1% of FSO, standard
Alarm Outputs: Dual form “C” (SPDT) relay contacts; individual setpoint 1 and setpoint 2 settings via top-accessible multiturn potentiometers; high/low alarm configuration standard; relay contacts rated 1 A/24 Vdc, 0.5 A/115 Vac, non-inductive
Alarm Indicators: Bi-color (red/green) LEDs on front panel
Alarm Response Time: 100 ms typical
Analog Output: 4 to 20 mA DC; output drive (compliance) determined by power source
Analog Output Response Time: 50 ms, typical
Test Function: Front-panel TEST button, when depressed, toggles both SP1 and SP2 alarm status and simultaneously sets display and analog output to “calibration” level, independent of pressure input, to allow testing system operation
Power: Any DC source of 9 to 32 Vdc, 1.0 W max
Electrical Connection: 0.9 m (3') long, 4-conductor 22 AWG shielded cable for power and retransmitted output; 0.9 m (3') long, 6-conductor 22 AWG cable for alarm contacts
ALARMS (final siffix 1N standard)1 = HI/LO (standard)
2= HI/HI
3= LO/LO
N = Normal Acting (standard)
R = Reverse Acting
Example: DPG1000ANA-15G-3RHAS LO/LO ALARMS, Reverse Acting
For alternative Digital Pressure Gauges please visit the following links:DPG-108DPG104-DPG104SDPG-110DPG-101
