Red Lion PAX2A - Manual (Page 32)

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Preparation for Current, Volt, and Ohm Input Calibration
Warning: Input Calibration of this meter requires a signal source
capable of producing a signal greater than or equal to the range
being calibrated with an accuracy of 0.01% or better.
Before starting, verify that the Input Range, T/V, and Excitation Jumper is set
for the range to be calibrated. Verify that the precision signal source is connected
and ready. Allow a 30 minute warm-up period before calibrating the meter.
Selecting NO at any calibration step, will cause the unit to maintain the existing
calibration parameters for that step. Selecting YES and pressing the P key will
cause the unit to store new calibration settings for the range selected. Pressing
D at any time will exit programming mode, but any range that has been
calibrated will maintain the new settings.
Current, Volt and Ohm Calibration Procedure
1. After entering CodE 48, in Module 9, select the input signal type (Curr,
UoLt , OhMS) to be calibrated.
2. Press the P key until the desired range along with 2ER is indicated on Line 1
of the meter.
3. Apply the zero input limit of the range indicated on Line 1 of the meter.
4. Press ! to select YES.
5. Press P. Display will indicate ---- on Line 2 as the unit reads and stores the
new calibration parameter.
6. Display will indicate the desired range along with FUL on Line 1 of the meter.
7. Apply the signal level indicated on Line 1 of the meter.
8. Press ! to select YES.
9. Press P. Display will indicate ---- on Line 2 as the unit reads and stores the
new calibration parameter.
10. Repeat Preparation and Calibration Procedure for each Input Range to be
calibrated.
Preparation for TC calibration
TC calibration parameters will affect RTD calibration. If using an RTD, it is
recommended that the RTD calibration be performed after completing the TC
calibration.
Warning: TC Input Calibration of this meter requires a signal source
capable of producing a 60 mV signal with an accuracy of 0.01%
or better.
Before starting, verify the T/V jumper is in the T position. Verify the precision
signal source is connected and ready. Allow a 30 minute warm-up period before
calibrating the meter. Selecting NO at any calibration step, will cause the unit to
maintain the existing calibration parameters for that step. Selecting YES and
pressing P key will cause the unit to store new calibration settings for the range
selected. Pressing D at any time will exit programming mode, but any range that
has been calibrated will maintain the new settings.
TC Calibration Procedure
1. After entering CodE 48, in Module 9, select the tc.
2. Press the P key. Display will indicate 0.060U with 2ER in upper right.
3. Apply 0 mV to input.
4. Press ! to select YES.
5. Press P. Display will indicate ---- on Line 2 as the unit reads and stores the
new calibration parameter.
6. Display will indicate 0.060U with FUL in upper right.
7. Apply 60 mV to input.
8. Press ! to select YES.
9. Press P. Display will indicate ---- on Line 2 as the unit reads and stores the
new calibration parameter.
10. TC Calibration complete.
Preparation for RTD Input Calibration
RTD calibration is dependent on TC calibration parameters. Therefore, the
TC calibration should be performed prior to attempting the RTD calibration.
Warning: RTD Input Calibration of this meter requires a signal
source capable of producing a 300 ohm resistance with an
accuracy of 0.01% or better.
Before starting, verify that the T/V Jumper is in the T position. Verify the
RTD jumper is in the proper range. Verify the precision signal source is
connected and ready. Allow a 30 minute warm-up period before calibrating the
meter. Selecting NO at any calibration step, will cause the unit to maintain the
existing calibration parameters for that step. Selecting YES and pressing P key
will cause the unit to store new calibration settings for the range selected.
Pressing D at any time will exit programming mode, but any range that has been
calibrated will maintain the new settings.
RTD Calibration Procedure
1. After entering Code 48, in Module 9, select rtd.
2. Press the P key until the desired range along with 0 in upper right corner is
indicated on Line 1 of the meter.
3. Apply zero ohms to the input of the meter.
4. Press ! to select YES.
5. Press P. Display will indicate ---- on Line 2 as the unit reads and stores the
new calibration parameter.
6. Display will indicate the desired range along with a value in the upper right
corner, in ohms, to be applied in the next step on Line 1 of the meter.
7. Apply the signal level, in ohms, indicated in the upper right corner of Line 1
on the meter.
8. Press ! to select YES.
9. Press P. Display will indicate ---- on Line 2 as the unit reads and stores the
new calibration parameter.
10. Repeat Preparation and Calibration Procedure for each Input Range to be
calibrated.
Ice Point Calibration Procedure
1. Remove all option cards.
2. Verify ambient temperature of meter environment is between 20°C and 30°C.
3. Set T/V jumper in the T position.
4. Connect a thermocouple with an accuracy of 1°C or better to the meter.
5. In Module 1 of unit programming, verify Input Range (rANgE) is set to the type
thermocouple connected in step 4, Temperature Scale (SCALE) is °C, Ice Point
Compensation (ICE) is turned ON, Decimal Resolution (dECPNt) is 0.0,
Rounding Increment (round) is 0.1 and Display Offset (OFFSEt) is set to 0.
6. Place the thermocouple in close thermal contact to a reference thermometer
probe. (Use a reference thermometer with an accuracy of 0.25% °C or better.)
The two probes should be shielded from air movement and allowed sufficient
time to equalize in temperature. (A calibration bath could be used in place of
the thermometer.)
7. If a difference exits between PAX2A display and reference thermometer,
continue calibration.
8. Note the PAX2A display reading as the “Display Mode” reading to be used in
Step 12.
9. Enter Module 9, select CodE 48 and press P.
10. Select ICE and press P.
11. Display will indicate the Existing ICE Point Value.
12. Calculate a new ICE Point Value using: Existing ICE Point Value +
(reference temperature – Display Mode reading). All values are in °C.
13. Using ! and @ change Existing ICE Point Value to indicate the new ICE
Point Value calculated in Step 12.
14. Press P and return to Display Mode. Verify the Display Mode reading (with
0 Display Offset) matches the reference temperature. If not, repeat steps 8
thru 14.
Preparation for Analog Output Card Calibration
Warning: Calibration of this meter requires an external meter with
an accuracy of 0.005% or better.
Before starting, verify that the precision voltmeter (voltage output) or current
meter (current output) is connected and ready. Perform the following procedure.
1. After entering CodE 48, in Module 9, select AnLOut.
2. Using the chart below, step through the five selections to be calibrated. At
each prompt, use the PAX2A ! and @ keys to adjust the external meter
display to match the selection being calibrated. When the external reading
matches, or if the particular range is not in need of calibration, press the P key
to advance to the next range.
PAX2A DISPLAY EXTERNAL METER ACTION
0.000A 0.00 mA ! and @ to adjust External Meter
0.004A 4.00 mA ! and @ to adjust External Meter
0.020A 20.00 mA ! and @ to adjust External Meter
0.0v 0.00 V ! and @ to adjust External Meter
10.0v 10.00 V ! and @ to adjust External Meter
3. Calibration Complete.