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Calibration
The PRTXB is factory calibrated and there is generally no need
to alter calibration settings. Required calibration equipment
includes a temperature reference of at least four times the
unit's accuracy, a dry-block calibrator or a temperature
controlled bath.
Calibration may be performed in any of the available
temperature units, the use of Fahrenheit or Celsius is assumed
in this procedure. Select the temperature units for calibration
prior to entering the calibration mode.
The unit enters and remains in the calibration mode until
restarted manually or power is removed. While in the calibration
mode, the auto shutoff timer is disabled, and the Min/Max
feature is disabled.
The unit is calibrated at two points, at ice point and at a
temperature above ice point.
For general service, the full scale temperature is normally used
for the second point. However, if a particular temperature is of
critical interest it may be used instead for greatest accuracy at
that point.
Enter Calibration Mode
To enter the calibration mode, begin with
the unit powered off, and press and hold the
t button.
Then press the power button.
Release all buttons when the display
indicates CAL.
Before the unit enters the calibration mode,
the display initially indicates _ _ _ _ with the
first underscore blinking, and with CALPC on
the lower display.
Note: The unit will automatically revert to
normal operation if no buttons are operated
for approximately 15 seconds.
To cancel and return to normal operation,
press and release the power button without
entering any pass code characters.
Enter the user-modifiable pass code (3510
factory default).
Use the s and t buttons to set the left-
most digit to 3.
Press and release the power button to index
to the next position. The 3 will remain, and
the second position will be blinking.
Use the s and t buttons to select 5.
Press and release the power button to index
to the next position. 3 5 will remain, and the
third position will be blinking.
Use the s and t buttons to select 1.
Press and release the power button to index
to the next position. 3 5 1 will remain, and
the fourth position will be blinking.
Use the s and t buttons to select 0.
Press and release the power button to
proceed with calibration.
Note: If an incorrect pass code is entered, the
unit will return to the start of the pass code
entry sequence.
Calibration Procedure
Upon successful pass code entry, the
upper display will indicate the RTD probe
temperature. The lower display will alternate
as indicated below.
Note: To store the calibration parameters
and exit calibration mode at any time, press
and hold the power button until the display
indicates - - - -.
Ice-Point Calibration
When the applied temperature is below
approximately 12 °C (or 54 °F), the unit will
automatically select the ice-point calibration
mode.
Apply 0.0 °C or 32.0 °F to the RTD.
The lower display will alternate between ICE
and DEG C or DEG F.
Use the s and t buttons to adjust the upper
display to indicate 0.0 °C or 32.0 °F.
Span Calibration
Apply full-scale temperature to the RTD.
The lower display segments will alternate
between CAL and DEG C or DEG F.
Use the s and t buttons to adjust the upper
display segments to indicate the applied
temperature value.
To store the calibration parameters and exit
calibration mode, press and hold the power
button until the display indicates - - - - .
Changing the Pass Codes
s
t
2
1
The factory default pass code of 3510 may be changed if
desired. Separate pass codes may be used for min/max
c a l
configuration access and calibration access.
Configuration Pass Code Access
With the unit off, press and hold the s
s
t
button.
Release buttons
Then press the power button.
_ _ _ _
Release all buttons when the display
calpc
indicates CFG.
s
t
Calibration Pass Code Access
With the unit off, press and hold the t button
3 _ _ _
to view and/or change the user calibration
pass code.
calpc
Then press the power button.
s
t
or
Release all buttons when the display
Move to
Increment
indicates CAL.
next #
up or down
View/Change Pass Code
3 5 i 0
Before the unit enters the view or change
calpc
pass code mode, the display initially indicates
_ _ _ _ with the first underscore blinking,
s
t
or
and with CFGPC or CALPC on the lower
Move to
Increment
display.
next #
up or down
Note: The unit will automatically revert to
3 5 i 0
normal operation if no buttons are operated
for approximately 15 seconds.
calpc
To cancel and return to normal operation,
s
t
press and release the power button without
Press to enter
entering any pass code characters.
calibration mode
Enter Access Code 1220
Use the s and t buttons to set the left-
most digit to 1.
Press and release the power button to index
to the next position. The 1 will remain, and
the second position will be blinking.
Use the s and t buttons to select 2.
75 . 0
Press and release the power button to index
def F
to the next position. 1 2 will remain, and the
cal
third position will be blinking.
s
t
Use the s and t buttons to select 2.
Press and release the power button to index
to the next position. 1 2 2 will remain, and
the fourth position will be blinking.
Use the s and t buttons to select 0.
Note: If an incorrect access code was
entered, the unit will return to the start of the
access code entry sequence.
PRTXB Series RTD Process Thermometers
Press and release the power button to
proceed.
3 2.0
The display will indicate the existing user-
ice
defined pass code with CFGPC or CALPC on
deg F
the lower display. To exit without changes,
s
t
press the power button.
or
Increment up
Operate the s and t button to select
or down
the first character of the new pass code.
Characters 0-9 and A, b, C, d, E, F may be
39 2.0
used.
When the correct first character is being
cal
displayed, press and release the power
deg F
button to proceed to the next pass code
s
t
character.
or
Increment up
Repeat above until the entire pass code is
or down
complete.
To exit the view or change pass code mode,
- - - -
press and hold the power button.
Release the button when the display
s
t
indicates - - - - to restart the unit.
Press to save and
restart
s
t
2
1
cf 6
s
t
Release buttons
_ _ _ _
cfgpc
s
t
- or -
s
t
2
1
ca l
s
t
Release buttons
_ _ _ _
calpc
s
t
i _ __
cfgpc
s
t
or
Move to
Increment
next #
up or down
i 220
cfgpc
s
t
or
Move to
Increment
next #
up or down
3
35 i0
cfgpc
s
t
Press to enter pass
code configuration
mode
35 i0
cfgpc
s
t
or
Move to
Increment
next #
up or down
A 25 0
cfgpc
s
t
Move to
Increment
next #
up or down
A 250
cfgpc
s
t
Press to save and
restart
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