Functions - K-TEK MT5000 Installation & Operation Manua

4.6.2. FUNCTIONS

Adjustments to the settings which control the shape of the signal and what part of the signal is accepted as the
measurement may be accessed through the WAVEFORM screens. By highlighting the function in the top right cor-
ner of the WAVEFORM screen and pressing the SELECT button, you can scroll through each of these functions. To
adjust a certain function, when the function appears, press and hold the SELECT button for 2 seconds. The WAVE-
FORM screen will change to a field entry screen which corresponds to the function.
Functions Available from the WAVEFORM screen:
1. LTV = Threshold (in DC Volts)
The Threshold voltage provides a method of signal detection
along the waveform. Digitally set from 0 to 2 volts, the return
signal from the process must cross this barrier to be detected
as a signal. The MT5000 is designed to detect the first pulse
crossing the Threshold. The Threshold may need to be raised
to avoid baseline interference or lowered to detect the correct
pulse.
2. BLK = Blanking (in terms of UNITS)
Blanking is a measured area which the MT5000 will be set to
ignore. This will be set based on the NOZZLE LENGTH from
the BASIC SETUP menu. It may be necessary to extend the
Blanking further past the nozzle to ignore reflections from the
top portion of the probe. Blanking is set in terms of UNITS. To
adjust the Blanking enter the distance from the Reference
Measurement to be ignored.
3. GAIN = Signal Amplification (1 thru 99)
GAIN is a factory set function designed to adjust the return
pulse to the best possible signal to noise ratio. The GAIN set-
ting will be optimized by the MT5000 based on the entries from
the BASIC SETUP menu. Increasing the GAIN setting will am-
plify the noise as well as the return pulse. Lowering the GAIN
setting will decrease the return pulse as well as the noise.
4. SHAPE = 1 or 2
The SHAPE function will be set based on the mounting
configuration. Like the GAIN function it is designed to create the
best signal to noise ratio from the return pulse. The SHAPE set-
ting will determine how the signal is amplified.
5. RNG = 1 or 2
The RANGE setting is determined by the PROBE LENGTH.
Probes shorter than 100 feet will be set to RANGE 1. Probes
from 100 to 200 feet will be set to RANGE 2. Changing the
RANGE setting will erase all factory trim settings and calibration
values. Changing the RANGE setting is not recommended
unless a commitment to changing the physical probe length has
been made.
Note: After setting the value of each function, pressing the SELECT button will return you to the WAVEFORM screen.
MT5000-0200-1 Rev f (10-2010) DCN0528
Access to
Functions
Blanking
Threshold
THRESHOLD
X.XX
LVL: XX.XX in XX.XX mA
BLANKING
XX.XX inches
LVL: XX.XX in XX.XX mA
GAIN
XX
LVL: XX.XX in XX.XX mA
SHAPE
1
LVL: XX.XX in XX.XX mA
RANGE
1
LVL: XX.XX in XX.XX mA
Signal
25