CALIBRATING LOW LEVEL ALARM
MODEL 610
Model 610
8
• Submerge the Probe in liquid nitrogen (LN
2
) for 10 minutes.
• Press the battery “On/Off-Cal” toggle switch downward and hold.
• Use the screwdriver (supplied) turn the adjuster clockwise or counter-clockwise
until the tone begins to sound. Slowly turn the adjuster until the tone sound just disappears.
• Release the “Cal” toggle switch to its battery “Off” position.
• Press “Cal” toggle switch to its full upright position or battery “On”.
• Press the “Push to Test” button to assure the battery power is turned on and calibrated.
ADJUST WITH
SCREW-
DRIVER
“ON/OFF”-CAL
TOGGLE SWITCH
PROBE
TEST BUTTON