Extech SDL470 Operating Manual

USER MANUAL

UVA, UVC Light Meter with Temperature

Model SDL470

Introduction

UVA and UVC light measurement in one meter

• Long wave 365 nm ultra-violet irradiance measurements (UVA)

• Professional UVA meter, used to measure the UVA Radiation from UVA light (black light)

Short wave 254 nm ultra-violet irradiance measurements (UVC)

• Professional UVC light meter, measures UVC irradiation from UVC light source

Two ranges: 2000 µW/cm² and 20 mW/cm²

• Meter includes two probes: UVA probe and UVC probe

• UV Sensor with cosine correction filter

UV Zero feature

• Applications include: Monitoring blue light radiation from welding equipment, UV

exposure, ink curing, adhesives and coatings

Microprocessor circuit provides high reliability and durability

• Separate UV light probe allows the user to measure UV light with optimum positioning

• Type K and Type J thermocouple thermometer (probe not included)

Real time SD memory card Datalogger, built-in calendar clock, real-time data recording,

with selectable sampling time (rate) from 1 second to 3600 seconds

Manual Datalogging (set the sampling rate to 0)

• Simple, innovative operation, PC not required to setup. Simply use the SD card to

transfer data from meter to PC

• SD card capacity: 1 GB to 16 GB.

LCD with green backlight is easy to read

• Meter can be set to default on auto power off or manual power off

Includes Data hold, Record MA and MIN readings

• Powered by Alkaline 1.5V AA x 6 batteries or 9V AC adaptor

• RS232/USB PC computer interface

Thank you for selecting the Extech Instruments Model SDL470 Ultraviolet Light Meter. The
SDL470 measures UVA and UVC light plus temperature. This device is shipped fully tested and
calibrated and, with proper use, will provide years of reliable service. Please visit our website
(www.extech.com) to check for the latest version of this User Guide, Product Updates, and
Customer Support.

Features

•

•

•

•

sterilization, graphic arts, photochemical matching, UV EPROM erasure, Photo-resist

•

•

•

•

•

2 SDL470-en-GB_v1.4 3/17

Meter Description

1. LCD display

2. HOLD and LCD Backlight button

3. Power button

4. Up arrow ▲ and UNITS button

5. Down arrow ▼ and FUNCTION button

6. MAX-MIN button

7. Time/Date Check and SET button

8. ENTER and LOG button

9. Side compartment (detailed below)

10. UVA Probe and UVC Probe input plug

11. Type K/J thermocouple socket

12. SD Card Slot

13. UVC sensor

14. UVA probe handle

15. UVA sensor (protective cover not shown)

Note: Battery compartment, tilt stand, and tripod mount are located on rear of meter

1. DC 9V power adaptor jack

2. Reset button

3. RS-232 output port

3 SDL470-en-GB_v1.4 3/17

Operation

Function/Measurement Selection

• Power the meter ON or OFF by pressing and holding the Power button for at least 2 seconds.

• If this is the first time the meter is powered ON or if the batteries have been replaced, the

meter may display the SET DATE message to remind user to set the date and time (see the
SETUP MODE section for setting the time and date).

• Scroll through the three measurement options (UVA LIGHT, UVC LIGHT, or TYPE K/J

THERMOMETER) by pressing and holding the Function button. The display icons are ‘A’ for
UVA Light, ‘C’ for UVC Light, and ‘tP’ for Type K/J thermometer.

UVA Light Meter

• Insert the UVA Probe Plug into the Probe Input Socket.

• Switch the meter ON by pressing and holding the Power button for at least 2 seconds.

• Select the UVA Light Meter option as described above in the Function/Measurement

Selection section.

• The display will show the µW/cm^2 unit of measure.

• The meter is now ready to make UVA light measurements.

• Holding the Sensor Handle, face the UVA Sensor toward the source of UVA light.

• The display will show the measurement reading.

UVC Light Meter

• Insert the UVC Probe Plug into the Probe Input Socket.

• Switch the meter ON by pressing and holding the Power button for at least 2 seconds.

• Select the UVC Light Meter option as described above in the Function/Measurement

Selection section.

• The display will show the µW/cm^2 unit of measure.

• The meter is now ready to make UVC light measurements.

• Holding the Sensor Body, face the UVC Sensor toward the source of UVC light.

• The display will show the measurement reading.

LCD Backlight

• Press and hold the HOLD/Backlight button for 2 seconds to switch the LCD backlight ON/OFF.

ZERO Adjustment

• Cover the light sensor with the protective cover.

• If the meter display does not read zero, press and hold both the up and down arrow buttons

simultaneously for at least 3 seconds.

• The display will automatically zero.

• Remove the sensor cover to begin taking measurements.

4 SDL470-en-GB_v1.4 3/17

Type K/J Thermometer Measurements (Probe is optional)

• Plug a thermocouple (not supplied) into the temperature probe jack at the top of the meter.

• Switch the meter ON by pressing and holding the Power button for at least 2 seconds.

• Select the Thermocouple function as described in the Function/Measurement Selection

section.

• The meter display will show the temperature measurement along with the ‘K’ or ‘J’

thermocouple indicator. The meter defaults to Type K thermocouple; refer to the Setup
Mode section for instructions on how to change the thermocouple type.

Data Hold

• Press the HOLD button momentarily to freeze the displayed reading.

• The HOLD display icon will appear.

• Press the HOLD button again to release the display

• The HOLD display icon will switch OFF.

MAX-MIN Reading Store/Recall

For a given measurement session, this meter can record the highest (MAX) and the lowest (MIN)
readings.

• Press the MAX-MIN button momentarily (REC icon appears)

• The meter is now recording the MAX and MIN readings.

• Press the MAX-MIN button again to view the current MAX readings (MAX icon appears).

The readings on the display are now the highest readings encountered since the REC icon
was switched on (when the MAX-MIN button was first pressed).

• Press the MAX-MIN button again to view the current MIN readings (MIN icon appears).

The readings on the display are now the lowest readings encountered since the REC icon
was switched on (when the MAX-MIN button was first pressed).

• To exit the MAX-MIN mode, press and hold the MAX-MIN button for at least 2 seconds.

The meter will beep, the REC-MAX-MIN icons will switch off, the MAX-MIN memory will
clear, and the meter will return to the normal operating mode.

5 SDL470-en-GB_v1.4 3/17