Справочник Пользователя для K-Tec MT2000

 

MT2000-0200-1 Rev f (10-2007) 

DCN0160

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Use a milliamp (mA) meter to measure the output current.  When power is applied the output will go to 4.00 mA for 
at least one (1) second and then to either the measured level or an alarm condition output.  If this does not happen 
the transmitter may not be receiving enough power or the main electronic is defective.  Excessive current above 
21.00 mA is also an indication of improper power up or defective electronics. 
 

Valid Current Loop Outputs 

Output spiking up or down will usually result from improper THV or BLK settings.  Refer to the initial setup section for 
details.  If a module fails to communicate, verify from the model number that the particular communication option is 
included. 
 
Note:  Signal can be observed using an oscilloscope.  Refer to Appendix F for setup procedure. 

21.0 mA 

If the top board jumper is set to HI ALARM a loss of signal, a 
problem with the configuration or a malfunction will cause the 
output to be set to the alarm condition of 21.0 mA 
  

20.6 mA 

When the level increases above the 20.0 mA point the output 
will continue up to 20.6 mA and then latch until the level returns 
below the 20.6 mA level. 
  

4.0 mA to 20.0 mA 

Normal output range between 3.8 and 20.6 mA 
  

3.8 mA / (4.0 mA) 

When the level decreases below the 4.0 mA point the output will 
continue down to 3.8 mA and then latch until the level returns 
above the 3.8 mA level. [If LRS (Low Range Saturation) is set 
for 4.0 mA, that will be the lowest output, regardless of actual 
level.] 
  

3.6 mA 

If the top board jumper is set to LO ALARM a loss of signal, 
problem with the configuration, or a malfunction will cause the 
output to be set to the alarm condition of 3.6 mA 

SYMPTOM  

ACTION 

Output spiking high or raw counts 
jumping low 
  

 

Extend the Blanking (BLK) in increments of 4 

 

Lower the Threshold 

Output spiking low or raw counts 
jumping high 

Raise the Threshold 

 

Introduce a parallel ground plane 

Output mA erratic 

 

Check BLK, THV, GS (section 4.4.2 ) 

Output greater than 21 mA 
  

 

Check for shorts between electronics (+ and – on back) and ground  

      (case) 

 

Change the electronics module 

 

Power unit with an isolated supply 

Output too low 

 

Check for proper supply voltage 

 

Check terminal strip for leakage to cage. 

Raw Counts and Output remain 
constant but in measuring range 
  

 

Lower the Threshold 

 

Check the probe for obstructions 

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