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IE-COM-C3121-12

 

 

11 

 

 

Alarm indication and setting 

 

It  is  possible  to  set  lower  and  upper  limit  for  each  measured 
quantity.  Breaking  of  the  limit  is  indicated  by  blinking  of 
the appropriate  value  on  the  display.  If  a  new  alarm  was  indicated 
(i.e. it was not active in the previous measurement), display starts to 
display  the value  out  of limits. If  at  least  one  alarm  is  active,  audio 
indication  can  be  activated,  if  menu  AUDI  "On"  is  selected  (see 
setting  described  above).  Alarm  activation  of  each  value  can  be 
disabled  by  setting  lower  alarm  limit  of  the  desired  value  up  to  its 
maximum.  This  is  indicated  by  OFF  reading  at  the  position  of 
numeric value. Value of upper limit of the same alarm is indifferent.  

 

To  set  alarms  press  MENU  key,  select  ALAR  from  menu  items 
and confirm by pressing ENTER key. 

 
 

Reading  ALLO  indicates  adjusted  lower  alarm  limit  (here  air 
temperature).  Set  the  desired  value  by  means  of  the  arrow  keys. 
Press and hold the arrow key UP to make value increase fast. Press 
and  hold  the  arrow  key  DOWN  to  make  value  decrease  fast. 
Release the arrow key and press ENTER to confirm new limit.  
 
Reading  ALHI  indicates  adjusted  upper  limit  of  the  same  alarm 
(here  air  temperature).  Set  the  desired  value  in  the  same  way  as 
in above lower limit. If needed it is possible to get back to lower limit 
setting of the same alarm by pressing DISPLAY key. Press ENTER 
key to confirm new upper limit. 
  
 
Then you are offered to set alarm of other input value (here relative 
humidity). The procedure is the same as the above temperature limit 
setting.  Alarm  activation  of  each  value  can  be  disabled  by  setting 
lower  alarm  limit  of  the  desired  value  up  to  its  maximum.  This  is 
indicated by OFF reading at the position of numeric value. Value of 
upper limit of the same alarm is indifferent. 
 
 
It  is  possible  to  leave  the  alarm  setting  mode  by  pressing  MENU 
key.  New  adjusted  limits  up  to  pressing  MENU  key  are  stored 
in memory. 
 
After  pressing  ENTER  key  it  is  possible  to  set  alarm  limits  for  dew 
point temperature. 

 

 

Summary of Contents for Commeter C3121

Page 1: ...www cometsystem com Instruction manual Commeter C3121 Digital thermometer hygrometer with external probe...

Page 2: ...onditions 6 Dimensions 7 OPERATION OF THE DEVICE 8 Switching ON and OFF the device 8 Displaying of actual measured values 8 Function HOLD storing of actual measured values and minimum a maximum memory...

Page 3: ...D display Temperature is measured by RTD sensor Ni1000 6180ppm Instrument compares measured values of temperature humidity and dew point with two adjustable levels for each measured quantity Breaking...

Page 4: ...approximately 1m s temperature step 20 C Relative humidity Measuring range 0 to 100 RH Resolution 0 1 RH Accuracy 2 5 RH from 5 to 95 RH at 23 C Response time t90 1 min with plastic sensor cover witho...

Page 5: ...refreshed in interval up to 5 s in case measured values remain stable Refresh interval is shortened to approximately 0 7 s only if measured values change Current consumption in this mode in usual oper...

Page 6: ...perating range 5 to 95 RH no condensation device 0 to 100 RH probe Temperature and rel humidity restriction The measuring range of the external probe is limited in accordance with the graph and must n...

Page 7: ...IE COM C3121 12 7 Dimensions...

Page 8: ...the measurement mode and actual measured values are displayed If instrument is ON do not disconnect or connect the probe to prevent storing of incorrect value to minimum and maximum memory Displaying...

Page 9: ...isplay minimum resp maximum value of other values Pressing MIN MAX or MENU key again to return to default mode Minimum and maximum memory is cleared from menu after confirmation selection CLR see belo...

Page 10: ...FAST mode refreshment is fastest with regular interval approximately 0 7 s In the dynamic refresh mode DYN each 15 s refresh interval of display is doubled to maximum 5 s if measured values are stable...

Page 11: ...of the arrow keys Press and hold the arrow key UP to make value increase fast Press and hold the arrow key DOWN to make value decrease fast Release the arrow key and press ENTER to confirm new limit R...

Page 12: ...f d REF and AUDI from menu selections and data in memory HOLD MIN and MAX will be lost For the same reason do not disconnect the battery for longer than 1 minute even if instrument is switched OFF If...

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