P
RO
V
U
™ PD7000 Temperature Meter
Instruction Manual
34
Internal Temperature Calibration
(
ICAL
)
The meter is
factory calibrated
prior to shipment
to read temperature in degrees Fahrenheit with
calibration equipment that is certified to NIST
standards.
The Internal Calibration (
ICAL
) is a function used at
the factory to calibrate all the thermocouple and RTD
ranges. This procedure should only be used by
qualified personnel.
To recalibrate the meter for a specific input and
range, refer to
Recalibration of the Meter
(
t CAL
) on
page
31
.
Notes:
1. If meter is in operation and it is intended to
accept only one input type (e.g. 100 Pt),
recalibration of other inputs is not necessary.
2. Allow the meter to warm up for at least
30 minutes before performing the calibration
procedure.
3. Use the Recalibration of the Meter
(
t CAL
)
procedure on page 31
.
The
Internal
calibration
menu is part of the
Advanced
Features
menu and is described in the following
pages. This procedure should only be used by
qualified personnel.
Note: Most users should not require the use of the
Internal Calibration procedure. The T CAL
procedure should be used instead of the ICAL
procedure.
Thermocouple Input Internal Calibration (
ICAL
)
1. Set the Type selector switch in the TC position
and using copper wire connect a precision mV
calibrator to the input.
2. In the
Setup
menu select the input: TC
– Type J.
3. Press and hold the Menu button for three
seconds to access the advanced features of the
meter.
4. Press the Up
arrow button to scroll to the
Internal
calibration
menu (
ICAL
) and press Enter.
5. The meter displays either current calibration
(
nmref
). Press Enter
to start the calibration
process.
6. Measure the room temperature in degrees
Celsius using a reliable reference, enter the room
temperature (e.g. 25.0), and press Enter.
7. The meter displays
0mv
, apply an input equal to
0.000 mV and press Enter. The display flashes
while accepting the 0 mV input; press Enter again
when the display stops flashing.
8. The meter displays
100mv
, apply an input equal
to 100.000 mV and press Enter. The display
flashes while accepting the 100 mV input; press
Enter again when the display stops flashing.
9. Apply 0 mV, the meter should read room
temperature.
10. This completes the calibration of all the
thermocouple ranges.
RTD Input Internal Calibration (
ICAL
)
1. Set the Type selector switch in the RTD position
and the Range switch in the 10 position. Using 3
wires connect a precision calibrator resistance
output to the meter.
2. In the
Setup
menu select the input: RTD
– 100 Pt
– A385.
3. Access the
Advanced Features
menu and scroll
to the
ICAL
menu and press Enter.
4. The meter displays the message (
10 lo
). Apply
9.035 ohm and press Enter. The display flashes
for a moment while the meter is accepting the low
input signal for the 10-ohm RTD. After the display
stops flashing, press Enter again.
5. The meter displays the message (
10 Hi
). Apply
18.032 ohm and press Enter. The display flashes
for a moment while the meter is accepting the
high input signal for the 10-ohm RTD. After the
display stops flashing, press Enter again.
6. The meter displays the message (
100 lo
).
Do
NOT press Enter
.
7. Move the Range selector switch to the 100
position. Apply 100 ohm and press Enter. The
display flashes for a moment while the meter is
accepting the low input signal for the 100-ohm
RTD.
8. The meter displays the message (
100 Hi
). Apply
320.12 ohm and press Enter. The display flashes
for a moment while the meter is accepting the
high input signal for the 100-ohm RTD.
9. At the end of the calibration process the meter
should read 1148.0F with the 320.12-ohm input
applied.
10. This completes the calibration of all the RTD
ranges.
