Baker Hughes Druck DPI880 Manual De Instrucciones página 15

3.2 Clean the Unit
Clean the case with a moist, lint-free cloth and a weak
detergent. Do not use solvents or abrasive materials.
3.3 Replace the Batteries
To replace the batteries, refer to Figure 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.
4. Calibration
Note: Druck 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.
4.1 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
Calibration Equipment
Function
(ppm = parts per million)
mA calibrator.
mA OR
Accuracy - mA input/output: Table 10 & Table 11
mA (Dual ...)
Accuracy - mA (Dual Function): Table 10
mV calibrator.
mV OR
Accuracy - mV input/output: Table 12 & Table 14
TC (mV)
Accuracy - TC (mV): Table 20
Volts calibrator.
Volts OR
Accuracy - Volts input/output: Table 13 &
Table 15
Volts (Dual ...)
Accuracy - Volts (Dual Function): Table 13
1) Frequency meter
Total error: 7 ppm or better
Hz
Resolution: 8 digits (minimum)
2) Signal generator
UMM only. Refer to the user manual for the
IDOS
IDOS UMM.
- Standard RTD probe
Accuracy: 50 mK for 23 to 82.4°F (-5 to 28°C)
CJ
- Digital thermometer
Accuracy: 10 mK
- Standard 0Ω resistor
- Standard resistor (Ω): 100, 200, 300
a
Tolerance: 50 ppm + 0.6 ppm/°C + 5 ppm/year
RTD Ohms
- Standard resistor (Ω): 400, 1k, 2k, 4k
a
Tolerance: 10 ppm + 0.6 ppm/°C + 5 ppm/year
An ohmmeter or an RTD measurement system
with the specified excitation currents (Table 19).
RTD Ohms
a. Or an equivalent resistance simulator.
Before you start the calibration, make sure that the time
and date on the instrument are correct (Table 1).
4.1.1 Selection Sequence:
 Task selection menu  Set Up (Table 1)  Calibration 
Display: Enter
1 2
Calibration PIN

4 3 2 1 
MENU
OK
+

Factory PIN =
4321
Select Function
5a
(If applicable)
...


...
(Table 9)
Table 9: Calibration Options
Options Description
To calibrate the specified input/output:
...
...
... = mA, mV, Volts, Hz, RTD (Ohms), TC (mV)
...
UMM only. To calibrate the specified IDOS
IDOS UMM. Refer to the user manual for the IDOS
UMM.
CJ To calibrate the cold junction channel.
mA (Dual ...) To calibrate the mA (Dual Function) input.
Volts (Dual ...) To calibrate the Volts (Dual Function) 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).
When you select a channel/function, 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.
4.2 Procedures: mA Input
1. Connect the instrument to the calibration equipment
(Figure 3).
2. Let the equipment get to a stable temperature
(minimum: 5 minutes since the last power on).
3. Use the calibration menu (Table 9) to do a three-point
calibration (-FS, Zero and +FS). The display shows the
applicable instructions to complete the calibration.
4. To make sure that the calibration is correct, select the
applicable mA input task (Table 2) and apply these
values:
• mA: -55, -40, -24, -18, -12, -6, 0 (open circuit)
• Then mA: 0, 6, 12, 18, 24, 40, 55.
English–DPI880 Instruction Manual | 11
Menu:
3 4
Select Channel
mA

MENU
OK

(Table 9)
5b
MENU
OK
Copyright 2005 Baker Hughes Company.
5
MENU
OK