Ice Bath Rtd Calibration - Siemens SITRANS F Instruction Manual

Section 4
RTD Calibrate
4.6.1 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 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
window:
To enable numeric entry press
(e.g., 72.0):
To recalibrate the RTD sensor press
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.
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.

4.6.2 ICE BATH RTD CALIBRATION

Use a distilled, deionized water and ice mixture at 0
perature with a reference thermometer. Siemens can not assume responsibility for the incorrect design,
construction or operation of an ice bath.
CAUTION: DO NOT ALLOW AN RTD SENSOR TO MAKE DIRECT CONTACT WITH ICE
DURING AN ICE BATH CALIBRATION.
To perform a 32ºF (0ºC) RTD Calibration:
Immerse RTD sensor in deionized water and ice mixture. Stir the mixture constantly.
Move the highlight by pressing
To access the RTD option list press
This triggers the pop-up window.
RTD CALIBRATE MENU STRUCTURE (Single Channel)
Ö
Ch 1 Ts RTD 1
Ch 1 Tr RTD 2
Ch 2 Ts RTD 3
Ch 2 Tr RTD 4
Calib @ deg F
=32.0
, then type in the reading of the reference thermometer
Calib @ deg F
=72.0
ENT
Ö
Factory
Ú
User Cal
Ö Factory
Ú
User Cal
.
ENT
. To verify the calibrated reading, go to [Diagnostics/
° °
C (32 F) equilibrium for an ice bath. Ensure tem-
to the RTD you want to calibrate (RTD1 or RTD2).
. Move the highlight to [User Cal] then press
4-11
1010ENFM-3B
. This triggers the pop-up
.
ENT