Velleman DVM99 - Manual (Page 5)

DVM99
V. 03 – 22/08/2013 5 ©Velleman nv
• Use the mode button [C] to scroll through the available functions. The
current function is flashing (except ε).
MIN
The MIN function is not supported.
MAX The MAX function is not supported.
LOCK Press the IRT button [D] to enable LOCK-mode (continuous
measurement). Press the hold button [E] to exit LOCK-mode.
°C/°F When °C indication is flashing, press the IRT button [D] to switch
to °F mode and vice versa.
ε Press the up [E] and down [D] buttons to set the emissivity
(see §7).
• To switch off the thermometer press the ON/OFF button [F] two times.
Clamp mode
•
All data is shown on the probe/clamp LCD [B2].
• Push the clamp trigger [G] to open the clamp [H]. Place the clamp over
the target (e.g. a hot pipe) and read the temperature.
• Press the mode button [C] to switch between °C and °F display.
• Press the hold button [E] to hold the current value on the display. Press
the hold button [E] again to continue measuring.
• To switch off the thermometer press the ON/OFF button [F].
Probe mode
•
All data is shown on the probe/clamp LCD [B2].
• Insert the probe [I] into the target and read the temperature.
• Press the mode button [C] to switch between °C and °F display.
• Press the hold button [E] to hold the current value on the display. Press
the hold button [E] again to continue measuring.
• To switch off the thermometer press the ON/OFF button [F].
7. Useful information
Emissivity
Emissivity describes the energy-emitting characteristics of materials. Most
organic or oxidized surfaces have an emissivity of ±0.95 (default setting).
Measuring shiny or polished surfaces will be inaccurate. Use some masking
tape or paint to compensate, allow sufficient time for the tape or paint to
reach the surface temperature.
Refer to the table for an indication of some emissivity values.