Omega Engineering DP3300 Series 用户手册

DP3300 Series User’s Manual 

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On pushing SETUP key while the display is flashing SYS , the display briefly shows 'dSP  OPt'  (for display option) and then 
the current Display Option setting.  Following display options are selectable. Use ^v key to step thru these options. Once the 
desired Display Option is shown, push SETUP key to enter the setting and go to set Display Time. 
 
Option  

SCAN   

 

      SCAN 

 

 

Scan all channels that are turned on. 

HIGH POINT 

 

      HIGH Pt   

 

Display peak value of all channels that are turned on. 

LOW POINT 

 

      LO  Pt 

 

 

Display low reading of all channels that are turned on. 

CH1 – CH2 

 

      CH1 – CH2 

 

Channel 1 differentialwith respect to channel 2 

CH2 – CH1 

 

      CH1 – CH2 

 

Channel 2 differentialwith respect to channel 1 

ELAPSED  TIME 

      ELPSEd  t 

 Elapsed 

time 

 
 

 
The first parameter in system setup mode is the DISPLAY TIME.  This determines how many seconds a channel's reading is 
displayed before scanning to the next channel. The display will first show 'dSPLy  t'  (for Display Time), and then the present 
setting in seconds.  Use ^v key (ref. Setup For High Scale) to set the desired DISPLAY TIME value.  Once the desired DISPLAY 
TIME value is displayed, push SETUP key to enter that value and go to Setup For Relay Latch/Non-Latch 
 

 
The next step lets you program the buzzer ON or OFF. The display will either read 'ALR ON'  or  'ALR  OFF'. To make an 
alternate selection, push ^v key. After making any change or to retain current setting, push SETUP key. This will take you to the 
very beginning of setup mode. 
 

 
The next parameter is the cold junction reference temperature.  The display will first show 'COLd  JN', and then the cold 
junction temperature will be indicated.  IF NECESSARY, use the ^v key to adjust until the display reads proper temperature.  
Once the correct temperature is displayed, push PROG key to enter that setting and go to Controller Calibration.  
 
NOTE 1: The unit should  be powered up for at least fifteen to twenty minutes before any adjustments are made to the cold 
junction reading. 
 
NOTE2:  Cold Junction temperature is the temperature at the connector where thermocouple connects (and forms the juntion) into 
the unit. IT IS NOT THE AMBIENT TEMPERATURE. 
 

 
After setting the Cold Junction Reference temperature, the next step is calibration of channels.  This allows easy calibration of 
each channel without the instrument scanning from channel to channel.  The display will show channel input reading in the form  
'x-nnnnn' (where x=channel number and nnnnn is the process reading). 
 

 

Note: Make sure the unit is reading correct cold junction temperature before calibration. 

If incorrect, adjust as described in the  "Program For Cold Junction" section. 

 
For calibrating a thermocouple Channel, the following steps should be performed.  Note that calibrating one channel will 
automatically calibrate the other channel.  Also, only one type of thermocouple input needs to be calibrated i.e. J,K,T or E. For 
example, if the calibration is done for a type K thermocouple, types J, T, and E are automatically calibrated.