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q
HI/SET/LO SWITCH
SOURCE:
Instantly output two preset thermocouple
temperatures by moving the HI/SET/LO switch to the
“LO”
position or
“HI”
position. For fast three point
checks select the
“DIAL”
position. The Omega
CL540A/CL540ZA will remember the last
“DIAL”
value, even with the power off.
These values can easily be changed to suit the
calibration requirements. The temperatures stored in
the HI and LO positions are also used for Auto
Stepping.
w
SOURCE/OFF Switch
Select “
SOURCE
” to output in °C, °F, or millivolts.
e
KNOB
SOURCE: Turn the knob to adjust the output
level. Turn clockwise to increase the output,
counter clockwise to decrease the output in 0.1°
steps at a time. Push down and turn the knob for
faster dialing.
Press and hold the knob for two seconds to store
desired HI/LO points in SOURCE mode.
Double click the knob to get into the Omega
CL540A/CL540ZA Configuration Mode. Use
configuration to select °C or °F, T/C Type
(CL540ZA Only) and Auto Off On/Off.
CHANGING BATTERIES
Low battery is indicated by
“BAT”
on the display.
Approximately one to four hours of typical
operation remain before the CL540A/CL540ZA
will automatically turn off. To change the batteries;
remove the optional rubber boot, remove the
battery door from the back of the unit by sliding
the door downward. This allows access to the
battery compartment. Replace with four (4) “AA”
1.5V batteries being careful to check the polarity.
Replace the battery door and replace the boot. All
stored configuration options (T/C Type, HI/SET/
LO Memories, etc., are reset to factory settings
when the batteries are removed.
Note:
Alkaline batteries are supplied and
recommended for maximum battery life and
performance.
Basic Operation
HI
TYPE K °C
OFF
Push & Hold
to Store
Push & Turn
for
Fast Dialing
Double Click
for Options
THERMOCOUPLE SOURCE
SOURCE
HI
SET
LO
J‐T‐E‐K‐R‐S‐B‐N‐G‐C‐D‐L‐U‐P‐mV
TYPES
322.1
(Optional Boot Shown)
