Druck DPI 841 사용자 설명서 - 페이지 12

{카테고리_이름} Druck DPI 841에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Druck DPI 841 14 페이지. Frequency calibrator and frequency loop calibrator

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Maintenance

This section gives procedures to maintain the unit in a

good condition. Return the instrument to the

manufacturer or an approved service agent for all repairs.

Do not dispose of this product as household waste. Use an

approved organisation that collects and/or recycles waste

electrical and electronic equipment.

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

(ppm = parts per million)

1) Frequency meter

Total error: 7 ppm or better

Resolution: 8 digits (minimum)

2) Signal generator

Pressure

UPM only. Refer to the user manual for the IDOS

UPM.

mA calibrator.

Accuracy: Refer to Table 12.

Amplitude (V)

1) Frequency meter

Total error: 7 ppm or better

Resolution: 8 digits (minimum)

2) Digital volt meter (DVM)

Before you start the calibration, make sure that the time

and date on the instrument are correct (Table 1).

- [EN] English

Calibration - Procedures (Hz - input/output)

Selection sequence:

➤

Select Task (Table 2)

Display: Enter

Calibration PIN

▲

▼

■ ■

Factory PIN = 4321

Table 9: Calibration options

Options

Description

To calibrate the input or output frequency.

...

Amplitude. To select and calibrate the output

amplitude for the Square Wave and then the

Sine/Triangular Wave.

IDOS ...

UMM only. To calibrate the specified IDOS UMM.

Refer to the user manual for the IDOS UMM.

DPI 842 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).

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.

1. Connect the instrument to the calibration equipment

(Figure 1).

2. Let the equipment get to a stable temperature

(minimum: 5 minutes since the last power on).

3. Set up the equipment with these conditions:

Frequency meter:

Gate time = one second

Signal generator:

Output = 10V, unipolar,

square wave

Frequency = 990 Hz

DPI 841/842:

Input units = Hz (Table 4)

Input trigger level = 5V (Table 4)

4. Use the calibration menu (Table 9) to do the calibration.

The display shows the applicable instructions to

complete the calibration.

➤

Set Up (Table 1)

Calibration

Menu:

Select Channel

▲

▼

(Table 9)

K395 Issue 3

➤