Epson USN 52R, USN 52L manual Range

Operation		Function check
Check	Result	Remark
4. Range
For settings see 2.	Initial pulse+Echo for RANGE/with Div.:	Up to RANGE = 25 mm only initial
RANGE: switch through from 5 mm to	50 mm / 0, 10	pulse and post-pulse oscillation
5000 mm	100 mm / 0, 5, 10	visible.
	250 mm / 5th Echo at 10	Set RANGE to fixed step range
	500 mm / 5th Echo at 5
	1000 mm / 4th Echo at 2	and press M.
	5000 mm / Echo sequence between 0 and 1
5. Pulse shift
See 2. for settings.	1st echo at Div. 4	Maximum shift is dependent on
DELAY approx. -17 µs		the range and the sound velocity.
DELAY approx. +17 µs	2nd echo at Div. 2
6. S/N ratio / Spurious oscillationg
For settings see 2. Also:	Both LEDs flash alternately.
PULSER: SINGLE
GATE LOGIC: POSITIVE
a-THRESH: 40%
a-START: 40 mm
a-WIDTH: 50 mm
GAIN so that 1st echo is just over the
gate
Press dB REF, then remove N30 and	read dB REF value: Db REF should be ≥ 80	Oscillations must not occur.
increase GAIN until the average value of	dB.
the noise is 40% SH

5-66 Issue 05, 02/00 Krautkramer USN 52R/USN 52L