Manual
4.5 Calibration Error Messages
If unexpected pressures are encountered during the calibration procedure, the instrument will alert the user by
flashing the word "HELP” and a message number on the display. This indicates that the calibration process cannot
continue, and that you must turn the instrument off and re-calibrate again when the error has been corrected. A list
of error message numbers and their causes is given in "TROUBLESHOOTING" in Chapter 7.
CHAPTER 5 OUPUT SIGNALS
5.1 Output Signal Overview
Outputs of 4-20 mA, 0-5 VDC, and dual-Iimit relays are available as options. Each unit comes completely wired with
3 feet (standard) of cable so that the user can power and use the gauge immediately.
5.2 Specifications
5.2.1 Limit Relay Option
Power Required: 11-32 VDC @ 30 mA max.
Number Of Relays: 2 form "C" (i.e. normally open, common, normally closed). One
relay for "high" limit, another for "low" limit.
Connection: Via terminal blocks inside case Interface: 3 feet of cable with
strain relief
Update Rate: same as display
Relay Contact Rating: 1 Amp @ 24 VDC
0.5 Amp @ 48 VDC
Max. switched power: 24W
Max. switched voltage: 60V peak-peak
Limit Setup: Via front panel push buttons
Limit Hysteresis: 1% of full scale
Limit Indicators: Front panel LED
"L 1" LED is lit when pressure is below the low limit setpoint.
"L2" LED is lit when pressure is above the high limit setpoint.
5.2.2 0-5 VDC Output
Power Required: 11-32 VDC @ 30 mA max.
Output: 0-5 VDC +1- 0.25% of full scale output
Display & Output Zero Adjust: Via front panel push buttons
Output Only Zero Adjust: Internal Potentiometer
Output Only Span Adjust: Internal Potentiometer
Operating Temperature: 30 to 160 degrees F
Connection: Via terminal blocks inside case
Interface: 3 feet of cable with strain relief
Update Rate: same as display
Max. Output Current: 0.2 mA
Short Circuit Protection: +Output to -Output
Minimum Output: At least -2.5% of full scale
Maximum Output: At least 102.5% of full scale
Reverse Voltage Protected: Yes
5.2.3 2-wire 4-20 mA Output
Supply Voltage: 2-wire loop, 11-32 VDC (load dependent, see figure 4-1)
Output: 4-20 mA +1- .25% of full scale output
Display & Output Zero Adjust: Via front panel pushbuttons
Output Only Zero Adjust: Internal Potentiometer
Output Only Span Adjust: Internal Potentiometer
Operating Temperature: 30 to 160 degrees F
Connection: Via terminal blocks inside case
DPG 100 11 Rev Feb 2001