9OPM4 ModelsRef. # DescRiption1 Battery status indicator - displays estimated battery life remaining. The 3 bars indicatethe charge level. When the battery is low, the battery indicator will flash.2 REF indicator - appears to indicate previously stored reference value(s).On the Ref key press, the reference indicator REF 2 and reference value(s) for the currentlyselected wavelength or detected WAVE ID wavelength(s) will be displayed briefly (for about 2-3seconds).CW mode - the reference value will be displayed in the field 5 .Single WAVE mode - The reference value will be displayed in the field 5 .Dual WAVE mode - The reference values will be displayed in the fields 5 and 7 .Tri WAVE mode - The reference value will be displayed in the field 5 and 7 on the firstpage and in the field 5 on the second page (replaces first page automatically in ~ 2 seconds).3 WAVE ID indicator - Will be displayed if the OPM4 is receiving a wavelength ID’d light.4 CW mode - This field displays the currently enabled wavelength.Single WAVE mode - This field displays the detected WAVE ID wavelength.Dual WAVE mode - This field displays the first detected WAVE ID wavelength.Tri WAVE mode - This field displays the first WAVE ID wavelength and the third WAVE IDwavelength that is shown on a second page (replaces first page automatically in ~ 2 seconds).5 This field displays measured power dBm or μW or insertion loss dB at the wavelength displayedin the field 4 .If power or loss is too high or low for the OPM4 to measure, this field will display HI or LO.6 CW mode - This field displays modulation frequency if detected.Dual WAVE mode - This field displays the second wavelength.7 Dual WAVE mode - This field displays measured power dBm or μW or insertion loss dB at thewavelength displayed in the field 6 .If power or loss is too high or low for the OPM4 to measure, this field will show HI or LO.8888 Hz-88.88 dB dBmnmμWWAVE IDREF123456-88.888888dB dBmnmμWHz-88.888888dB dBmnmμWWAVE IDREF1234576Single WAVE mode, orTri WAVE mode - second pageDual WAVE mode, orTri WAVE mode - first pageDisplay Readings in Test Mode8888