Omega CL940A User Manual

Operating Instructions
3-8
Backlight and Backlight Timeout
The instrument includes an LED backlight feature to ensure measurement data can be easily
read in low-light conditions. To activate the backlight, press .
Once the backlight is activated, it will automatically turn off after 30 seconds if no key is
pressed to preserve battery life. To disable the backlight timeout feature, press
(1.5s)
. The
backlight will flash to indicate the timeout feature has been disabled. To re-enable the
backlight timeout feature, turn the backlight off then on by pressing twice.
Operating Modes
The instrument has five (5) operating modes for channel one, “Source” including manual
operation explained in Figure 8 below. The operating modes are Manual, Fast ramp, slow
ramp, step and transfer.
OPERATING MODE
D
ISPLAY
INDICATOR
DESCRIPTION
Manual
blinking
“__ __ __ __”
Instrument operates by outputting a voltage that
corresponds to the set temperature or
millivoltage.
Fast Ramp
Instrument Ramps the output temperature or
millivoltage from 0% of span to 100% of span and
back to 0% of span in 20 seconds. This repeats
until stopped. Any other key press will stop the
output at the existing value (temperature or
millivoltage) and clear the fast ramp setting.
Slow Ramp
Instrument Ramps the output temperature or
millivoltage from 0% of span to 100% of span and
back to 0% of span in 120 seconds. This repeats
until stopped. Any other key press will stop the
output at the existing value (temperature or
millivoltage) and clear the slow ramp setting.
Step
Instrument Ramps the output temperature or
millivoltage from 0% of span to 100% of span and
back to 0% of span stepping at 10% increments,
dwelling 5 seconds at each step. This repeats
until stopped. Any other key press will stop the
output at the existing value (temperature or
millivoltage) and clear the Step ramp setting.
Transfer
Instrument sets the source output (temperature
or millivoltage) equal to the value on the “Read”
channel, (channel 2). This is an offset corrected
value. SOURCE output = READ voltage + CJC
voltage. This mode would be used for
troubleshooting systems and readouts. The
“Transfer” icon will blink and illuminate if selected.
Figure 8: Operating Modes

Omega CL940A Specifications

General

Brand	Omega
Model	CL940A
Category	Thermometer
Language	English