Maintenance; Maintenance - Clean The Unit; Maintenance - Replace The Batteries; Calibration - GE Druck DPI 821 User Manual

Maintenance

This section gives procedures to maintain the unit in a
good condition. Return the instrument to the supplier for
all repairs.
Maintenance – Clean the unit
Clean the case with a moist, lint-free cloth and a weak
detergent. Do not use solvents or abrasive materials.
Maintenance – Replace the batteries
To replace the batteries, refer to B1. Then re-attach the
cover.
Make sure that the time and date are correct. The
calibration facility uses the date to give service and
calibration messages.
All the other configuration options stay in memory.

Calibration

Note: GE can provide a calibration service that is traceable
to international standards.
We recommend that you return the instrument to the
manufacturer or an approved service agent for
calibration.
If you use an alternative calibration facility, make sure that
it uses these standards.

Calibration - Before you start

To do an accurate calibration, you must have:
• the calibration equipment specified in Table 8.
• a stable temperature environment: 70 ± 2°F (21 ± 1°C)
Table 8: Calibration equipment
Function Calibration equipment
mV mV calibrator.
Accuracy: Refer to Table 10.
CJ - Standard RTD probe
Accuracy: 50 mK for 23 ... 82.4°F (-5 ... 28°C)
- Digital thermometer
Accuracy: 10 mK
Pressure UPM only. Refer to the user manual for the IDOS
UPM.
mA mA calibrator.
Accuracy: Refer to Table 11.
Before you start the calibration, make sure that the time
and date on the instrument are correct (Table 1).
10 - [EN] English
Selection sequence:
B1
Options
When you select a channel, the display shows the
applicable instructions to complete the calibration.
When the calibration is complete, select Calibration Due
and set the new calibration date for the instrument.

Calibration - Procedures (mV input or output)

1. Connect the instrument to the calibration equipment:
• mV input = Figure 1
• mV output = Figure 2
2. Let the equipment get to a stable temperature
3. Use the calibration menu (Table 9) to do the calibration:
• mV input = three-point calibration (-FS, Zero and +FS).
• mV output = two-point calibration (Zero and +FS).
Select Task (Table 2) Set Up (Table 1)
Display: Enter
1 2
Calibration PIN
+
Factory PIN = 4321
Table 9: Calibration options
Description
mV To calibrate the input mV.
mV To calibrate the output mV
CJ... To calibrate the cold junction channel.
IDOS ... UMM only. To calibrate the specified IDOS UMM.
Refer to the user manual for the IDOS UMM.
mA DPI 822 only. To calibrate the mA input.
Calibration Due: To set the date of the next
calibration for the instrument.
After the specified calibration date, there is a
warning message. There is a selection box to stop
the warning.
To change the calibration PIN (Personal
Identification Number).
(minimum: 5 minutes since the last power on).
The display shows the applicable instructions to
complete the calibration.
Calibration
Menu:
3 4
Select Channel
(Table 9)
K346 Issue 2
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