Bird Technologies 5000-EX - Manual (Page 27)

Operation
15
"
Press Scale.
"
Change the units with the Fwd Units key until the
DPM units match the units on the forward element.
" Use the numeric keypad to enter the maximum
power of the element in the forward element socket.
Note: The element’s max power is listed on
the element nameplate.
"
Press ENTER.
Terminating Power Sensor (TPS)
Zeroing Sensor
Over time, the sensor’s “zero value” (reading with no
applied RF power) can drift, making all readings inac-
curate by this value. For example, if the zero value is –
2 µW, measuring a 5 mW signal will give a reading of
4.998 mW, a 0.04% error. Measuring a 50 µW signal
will give a reading of 48 µW, a 4% error. If the drift
would be a significant error, rezero the sensor:
"
Make sure the sensor has been connected to the
DPM and the DPM turned on for at least 5 minutes.
" Make sure no RF power is applied to the sensor.
"
Press Zero. “CAL 0” will be displayed and
calibration will begin.
" Zeroing the sensor takes 60 seconds. The bar graph
will display calibration progress. When complete,
“0 CAL PASS” should be displayed. Press ENTER to
return to normal operation. If “0 CAL FAIL” is
displayed, make sure no RF power is applied to the
sensor, press ENTER and zero the sensor again.
CAUTION
Do not exceed 2 W average or 125 W peak power for
5 µs when using the TPS or the TPS-EF.
Doing so will render the sensor inoperative.