4-11
1010PVNFM-3A
Section 4
4.6.1 RTD CALIBRATION BY DATA ENTRY
The RTD Calibrate menu allows you to adjust the intrinsic RTD reading to match an exter-
nal reference thermometer by directly entering its reading. Only perform this procedure
while the RTD under test is installed and currently measuring temperature.
To enter the current RTD temperature
Move the highlight to the RTD you want to calibrate (RTD1 or RTD2).
To access the RTD option list press .
Move the highlight to [User Cal] or [Factory] Cal then press . This triggers the pop-
up window:
ENT
To enable numeric entry , then type in the reading of the reference thermometer
(e.g., 72.0).
ENT
To recalibrate the RDT sensor . To verify the calibrated reading, go to [Diagnostics/
Liquid Data] to check the current RTD output. Make sure that it coincides with the
reading of the reference thermometer. Repeat for the other RTD if necessary.
Calib @ deg F
=72.0
RTD Calibrate RTD 1 Factory
User Cal
RTD 2 Factory
User Cal
ð
ð
ð
ô
ô
RTD CALIBRATE MENU STRUCTURE (Single Channel 1010)
Calib @ deg F
=32.0
To perform a 32ºF (0ºC) RTD Calibration:
Immerse RTD sensor in deionized water and ice mixture. Stir the mixture constantly.
Move the highlight to the RTD you want to calibrate (RTD1 or RTD2).
To access the RTD option list . Move the highlight to [User Cal] then press .
This triggers the pop-up window.
ENT
4.6.2 ICE BATH RTD CALIBRATION
Use distilled, deionized water and ice mixture at 0ºC (32ºF) equilibrium for an ice bath. En-
sure temperature with a reference thermometer. Controlotron can not assume responsibility
for the incorrect design, construction or operation of an Ice Bath.
NOTE: Factory Calibration provides an additional prompt after a new temperature is
entered: [Are you Sure? No Yes]. It is recommended that you use [User Cal] to
avoid alteration of preset factory calibration.
CAUTION: DO NOT ALLOW AN RTD SENSOR TO MAKE DIRECT CON-
TACT WITH ICE DURING AN ICE BATH CALIBRATION.
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