4-11
1010PFM-3GSection 4
To perform a 32ºF (0ºC) RTD calibration:
Immerse RTD sensor in deionized water and ice mixture. Stir the mixture constantly.
Move the highlight press to the RTD you want to calibrate (RTD1 or RTD2).
To access the RTD option list press . Move the highlight to [User Cal] then press .
This triggers the pop-up window.
4.5.6 RTD CALIBRATION BY DATA ENTRY
The RTD Calibrate menu allows you to adjust the intrinsic RTD reading to match an external reference
thermometer by directly entering its reading. Only perform this procedure while the RTD under test is
installed and currently measuring a known 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 press , then type in the reading of the reference thermometer
(e.g.72.0):
ENT
To recalibrate the RTD sensor press . To verify the calibrated reading, go to [Diagnostics/Liquid
Data] to check the current RTD output. Make sure it coincides with the reading of the reference ther-
mometer. Repeat for the other RTD, if necessary.
ENT
4.5.7 ICE BATH RTD CALIBRATION
Use distilled, deionized water and ice mixture at 0ºC (32ºF) equilibrium for an ice bath. Ensure tem-
perature with a reference thermometer. Siemens can not assume responsibility for the incorrect de-
sign, construction or operation of an Ice Bath.
Calib @ deg F
=72.0
Calib @ deg F
=32.0
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.
RTD Calibrate RTD 1 Factory
User Cal
RTD 2 Factory
User Cal
RTD CALIBRATE MENU STRUCTURE (Single Channel 1010)
CAUTION: DO NOT ALLOW AN RTD SENSOR TO MAKE DIRECT CONTACT WITH
ICE DURING AN ICE BATH CALIBRATION.
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