Red-lion DP5T Manuel d'utilisateur télécharger pdf (Page 17)

5.9 MODULE 9 - FACTORY SERVICE OPERATIONS ()

PARAMETER MENU

The meter has been fully calibrated at the factory.

Scaling to convert the input signal to a desired display

value is performed in Module 1. If the meter appears to be

indicating incorrectly or inaccurately, refer to

Troubleshooting before attempting to calibrate the meter.

When recalibration is required (generally every 2 years), it should only be

performed by qualified technicians using appropriate equipment. Calibration

does not change any user programmed parameters. However, it may affect the

accuracy of the input signal values previously stored using the Apply ()

Scaling Style.

Calibration may be aborted by disconnecting power to the meter before

exiting Module 9. In this case, the existing calibration settings remain in effect.

CALIBRATION





Before starting, verify that the Input Ranger Jumper is set for the range to be

calibrated. Also verify that the precision signal source is connected and ready.

Allow a 30 minute warm-up period before calibrating the meter.  and PAR

can be chosen to exit the calibration mode without any changes taking place.

Then perform the following procedure:

1. Use the arrow keys to display   and press PAR.

2. Choose the range to be calibrated by using the arrow keys and press PAR.

3. When the zero range limit appears on the display, apply the appropriate:

- Voltage ranges: dead short applied

- Current ranges: open circuit

4. Press PAR and  will appear on the display for about 10 seconds.

5. When the top range limit appears on the display, apply the appropriate:

- Voltage ranges: top range value applied (The 300 V range is the exception.

It is calibrated with a 100 V signal.)

- Current ranges: top range value

6. Press PAR and  will appear on the display for about 10 seconds.

7. When  appears, press PAR twice.

8. If the meter is not field scaled, then the input display should match the value

of the input signal.

9. Repeat the above procedure for each input range to be calibrated.

WARNING: Calibration of this meter requires a signal source with

an accuracy of 0.01% or better.

WARNING: Calibration of this meter requires a signal source with an

accuracy of 0.01% or better.

DP5D - Input Calibration

DP5P - Input Calibration

Before starting, verify that the precision signal source is connected to the

correct terminals and ready. Allow a 30 minute warm-up period before

calibrating the meter.  and PAR can be chosen to exit the calibration mode

without any changes taking place.

Then perform the following procedure:

1. Use the arrow keys to display   and press PAR.

2. Choose the range to be calibrated by using the arrow keys and press PAR.

3. When the zero range limit appears on the display, apply the appropriate:

- Voltage range: dead short applied

- Current range: open circuit

4. Press PAR and  will appear on the display for about 10 seconds.

5. When the top range limit appears on the display, apply the appropriate:

- Voltage range: 10 VDC

- Current range: 20 mADC

6. Press PAR and  will appear on the display for about 10 seconds.

7. When  appears, press PAR twice.

8. If the meter is not field scaled, then the input display should match the value

of the input signal.

9. Repeat the above procedure for each input range to be calibrated.

100 OHM RTD Range Calibration

1. Set the Input Range Jumper to 100 ohm.

2. Use the arrow keys to display   and press PAR. Then choose 

and press PAR.

3. At  , apply a direct short to input terminals 3, 4 and 5 using a three wire

link. Wait 10 seconds, then press PAR.

4. At  , apply a precision resistance of 300 ohms (with an accuracy of

0.01% or better) using a three wire link, to terminals 3, 4 and 5. Wait 10

seconds, press PAR.

5. Connect the RTD, return to the Display Mode and verify the input reading

(with 0 Display Offset) is correct. If not correct repeat calibration.

DP5T - Input Calibration

Warning: Calibration of this meter requires precision instrumentation

operated by qualified technicians. It is recommended that a

calibration service calibrates the meter.

Before selecting any of the calibration procedures, the input to the meter

must be at 0 mV or 0 ohms. Set the digital filer in Module 1 to 1 second. Allow

a 30 minute warm-up period before calibrating the meter. The  and PAR can

be chosen to exit calibration mode without any changes taking place.

10 OHM RTD Range Calibration

1. Set the Input Range Jumper to 10 ohm.

2. Use the arrow keys to display   and press PAR. Then choose 





and press PAR.

3. At  , apply a direct short to input terminals 3, 4 and 5 using a three wire

link. Wait 10 seconds, then press PAR.

4. At  , apply a precision resistance of 15 ohms (with an accuracy of 0.01%

or better) using a three wire link, to input terminals 3, 4 and 5. Wait 10

seconds, then press PAR.

5. Connect the RTD, return to the Display Mode and verify the input reading

(with 0 Display Offset) is correct. If not correct repeat calibration.





RESTORE FACTORY DEFAULTS

Use the arrow keys to display   and press PAR.

The meter will display  and then return to  .

Press DSP key to return to Display Mode. This will

overwrite all user settings with the factory settings.

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Red-lion DP5T Manuel d'utilisateur Page 17

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