VA Series Vapor Actuated Dial Thermometer
Vapor actuated thermometers give excellent readings when the bulb temperature is either above or below the temperature of the indicating head. Avoid applications in which the bulb and head are the same temperature (ambient applications). If the bulb “crosses ambient” (i.e., goes from hotter than the indicating head to cooler or vice versa), some pointer fluctuations will occur for up to two minutes during this transition.
Recalibration
The VA Series vapor actuated thermometers are manufactured with threaded, press fit and
To recalibrate your vapor actuated thermometer:
1.Remove the thermometer from its fitting.
2.Remove the lens.
4.Immerse the bulb totally in an agitated liquid for at least 3 minutes with a master reference thermometer, until they reach equilibrium.
5.Use a wrench, coin or screwdriver to turn the slotted hex nut on the back of the thermometer case until the pointer is at the proper reading on the scale.
6.Replace the lens and reinstall the thermometer in its fitting.
Care of the Vapor Actuated Thermometer
•Avoid bending the stem, as this will result in frictional errors in indication.
•Do not kink or flatten the capillary tube.
•Dampen any capillary vibration, as this may cause capillary breakage over time.
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