Zero Adjustment; Battery Alarm; Notes On Measurement - Konica Minolta T-10A Instruction Manual

Zero Adjustment

Zero adjustment is performed automatically when the power switch is set to "I" (ON).
z "CAL" (calibration) will be displayed in the display section during zero adjustment.
z Zero adjustment is performed electrically, so no cap is required.
z When zero adjustment is complete, "CAL" will disappear and "0 lx (0.0 fcd)" will appear (if the hold
button is pushed in (HOLD)).

Battery Alarm

When batteries start to run low, a battery mark appears above the measurements
on the display. When the batteries become very low, the battery mark will
begin to blink. Make new batteries available. If you still continue to use the
lx
batteries, the display will blank before long, indicating measurement is no
longer possible. Replace the batteries to restore normal operation.
↓
lx
↓

Notes on measurement

z Existing models T-10 and T-10M have a response speed selector switch that allows
you select the response speed between FAST (90% response time: 1 ms) and SLOW
(90% response time: 1 s) depending on the target light source. But this model does
not have such a switch with the 90% response time being fixed to 28 ms.
z This instrument is capable of measuring a light source with fluctuations in light
amount (luminous energy) such as a light source dimmed by pulse width modulation
(PWM) signals. But the use of this instrument for measuring a light source with a
low-frequency (less than 50 Hz) fluctuation may yield measurement errors.
z Select an appropriate range manually (see page 24) in the following cases. The selected range is
appropriate when bringing the receptor close to or away from the light source changes the readout.
z When you want to measure a noncontiguous light:
z Measuring such a light may freeze the readout. This is because the peak illuminance
of the light source is too high so that it exceeds the current measuring range.
z When the fluctuation in light amount is large:
z Measuring a light source whose light amount fluctuates largely near a measuring range
switching point may results in errors in calculated intensity of illuminance or MULTI AVG value.
z A momentary measurement error of approx. 0.5% lower than the correct value may occur at regular
intervals. This is due to the auto zero calibration feature (activated at intervals of approx. 6 min) of the
receptor, and is not a failure.
12
z Fresh alkaline batteries should provide enough power aprox.
72 hours of continuous measurements (at room temperature).
When replacing batteries: Remove both of the old
batteries first, and then install the new batteries.