Maintenance and Service
Replacing the Batteries
device.
Read and be familiar with this instruction manual before us-
ing this device.
The printed circuit boards (PCBs) contain static sensitive
parts. Always use appropriate electrostatic discharge pro-
tection, such as an electrical-grounding wrist strap, when
working with internal components.
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Required items:
2 x AA/LR6/1.5V alkaline, non-rechargeable batteries
To replace the battery:
1. Remove the back cover
2. Insert the new 1.5-volt batteries into the battery holder
Batteries cover
Batteries holder
Calibrating the Light Meter
Maintenance and Service
The MTTS Light Meter was factory calibrated to a radiometric stand-
ard in accordance to the National Institute of Standards and Technol-
To assure continued accurate measurement of irradiance, the MTTS
Light Meter should be recalibrated every 36 months to a radiometric
(irradiance) standard. Because certain calibration factors are stored
in the Light Meter memory, the Light Meter must be recalibrated at
MTTS. The date of the last calibration is labeled on the Calibration
Both the readout and sensor should be returned for calibration. The
Light Meters under warranty are recalibrated at no cost. Others are
recalibrated at nominal cost. For information on returning the Light
Meter, see below.
Service and Repair
The MTTS Light Meter has no customer serviceable parts, and must
be returned to MTTS for all repairs and parts replacement. After any
service, the Light Meter must be recalibrated radiometrically to as-
sure accurate measurement of irradiance.
Customer attempts to service the Light Meter will invalidate
the warranty and may result in irreparable damage
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