P
RO
V
U
™ PD7000 Temperature Meter
Instruction Manual
31
Display
Parameter
Action/Setting
nmref
Measured
temp
reference
Enter the measured
reference temperature
in degrees Celsius
(e.g. 25.0)
0nmV
0 mV
Apply 0.000 mV input
Internal Calibration
100nmV
100 mV
Apply 100.000 mV
input
Diag
Diagnostics
Display parameter
settings
LED t
LED test
Test all LEDs
(press menu to exit
test)
Info
Information
Display software
number and version
Erase
Erase
Erase MeterView Pro
software stored in
meter’s memory
Offset Adjust (
Adjus
t
)
This parameter allows the user to select an offset
adjustment to the temperature being displayed. Offset
adjustment values can be either positive or negative
and can be any number within
50.0
F (+27.8
C). The
offset adjustment value is programmed through the
Adjust
menu.
The offset adjustment feature can be useful to
compensate for errors due to thermocouple junctions or
excessive lead wire resistance in RTDs.
Note: The offset adjustment value is not reset to zero
when the type of temperature sensor is
changed (i.e. TC type or RTD curve).
Celsius/Fahrenheit conversion must be made
manually by the user.
Recalibration of the Meter (
t CAL
)
The
Calibration
(
t CAL
) menu is used to
recalibrate
the thermocouple and RTD inputs.
•
There is
no need to recalibrate
the meter
when first received from the factory. Simply
select the input type, ºF or ºC, and decimal
point.
•
The meter is
factory calibrated
prior to
shipment to read temperature in degrees
Fahrenheit with calibration equipment that is
certified to NIST standards.
•
Check calibration of the meter at least every
12 months.
Allow at least 30 minutes warm-up time before
performing recalibration procedure to ensure specified
accuracy.
Recommended Calibration Points
To recalibrate the meter, it is recommended to use
the Fahrenheit scale; this will give a greater degree of
accuracy to the calibration. The scale can be changed
to the Celsius scale after calibration is completed. The
meter will display temperature accurately in any scale.
The following table shows the recommended low and
high calibration points for all types.
Type of input
Input 1
(Low)
Input 2
(High)
Check
(Middle)
Type J
32
F
1184
F
600
F
Type K
32
F
1895
F
960
F
Type T
32
F
698
F
360
F
Type E
32
F
1652
F
800
F
Type R
32
F
3110
F
1500
F
Type S
32
F
3110
F
1500
F
Type B
32
F
3110
F
1500
F
Type N
32
F
1472
F
700
F
Type C
500
F
3650
F
1800
F
10
Cu RTD
32
F
9.035
450
F
18.032
200
F
12.639
100
Pt RTD
(0.00385)
32
F
100
1148
F
320.12
590
F
215.61
100
Pt RTD
(0.00392)
32
F
100
1148
F
324.49
590
F
217.89
120
Ni RTD
32
F
120
410
F
315.31
221
F
205.22
1000
Pt
RTD (0.00385)
32
F
1000
900
F
2750.4
450
F
1876.5
1000
Pt
RTD (0.00392)
32
F
1000
900
F
2785.1
450
F
1893.7
Recalibration Procedure
1. Connect signal to the meter using the appropriate
wire (e.g. type J thermocouple wire to recalibrate
type J input). See
Signal Connections
on page
14
.
2. Set up the meter to accept the selected input
(e.g. type J T/C). See
Setting Up the Meter
(
setup
) on page
20
.
3. Set up the meter to display temperature in
degrees Fahrenheit.
4. Apply signal corresponding to input 1 (32°F) and
program the display to read 32.0.
5. Apply signal corresponding to input 2 (1184°F for
type J) and program the display accordingly.
6. After the meter accepts input 2, the display
returns to reading mode. This completes the
recalibration procedure for the selected input.
Noise Filter (
filter
)
The noise filter is available for unusually noisy signals
that cause an unstable process variable display. The
noise filter averages the input signal over a certain
period. The filter level determines the length of time
over which the signal is averaged. The filter level can
be set between 2 and 199. The higher the filter level,
the longer the averaging time and so the longer it
takes the display to settle to its final value. Setting the
filter level to zero disables the filter function.
