Fluke 709H 校驗(yàn)儀設(shè)計(jì)有一個(gè)用戶友好型界面和一個(gè) Quick-Set 旋轉(zhuǎn)編碼器旋鈕。該工具減少了電壓、電流的測量或輸出時(shí)間及回路的加電時(shí)間。保護(hù)性皮套特別適合技術(shù)人員手握，大型背光顯示屏易于閱讀，甚至能在黑暗、狹促的工作區(qū)域讀屏。 709H 校驗(yàn)儀的特點(diǎn)：

• 0.01% 讀數(shù)精度

• 設(shè)計(jì)小巧耐用，依靠 6 節(jié)標(biāo)準(zhǔn)的 AAA 電池供電

• 直觀的用戶界面，Quick-Set 旋鈕可快速設(shè)置，易于使用

• 內(nèi)置 HART 通訊用 250 ? 可選電阻器

• 24 V 直流回路電源，帶有 mA 測量模式 (-25% ～ 125%)

• 電流量程分辨率為 1 µA，電壓量程分辨率為 1 mV

• 所有測量均采用簡單的雙線連接

• 自動(dòng)關(guān)機(jī)以延長電池壽命（關(guān)機(jī)時(shí)間最長可調(diào)至 30 分鐘）

• 可變步進(jìn)和斜坡時(shí)間（秒）

• 可調(diào)跨度選擇（0 ～ 20 mA 或 4 ～ 20 mA）

• 電子管測試（利用 % 鍵模擬所定義的 mA 值）

HART 特定性能包括：

• 快速傳輸校準(zhǔn)數(shù)據(jù)。 709H/Track 軟件/電纜能以 (.csv) 或 (.txt) 格式記錄您設(shè)備上所有 HART 變送器的參數(shù)。

• 可將數(shù)據(jù)記錄在一個(gè)特定變送器上，便于排除故障。 數(shù)據(jù)記錄工具具有 1 ～ 60 秒可選采集間隔，可記錄 9800 條記錄或 99 個(gè)單獨(dú)會(huì)話。每個(gè)數(shù)據(jù)樣本都含有 709H 測量值、全部四個(gè)過程變量及標(biāo)準(zhǔn)的狀態(tài)條件。

在通訊模式中，用戶能夠讀取基本的裝置信息，執(zhí)行診斷測試并微調(diào)大多數(shù) HART 變送器的校準(zhǔn)。在過去，該操作只能借助一個(gè)專用通訊器、一個(gè)多功能校驗(yàn)儀或一個(gè)配有 HART 調(diào)制解調(diào)器的筆記本電腦來完成。Fluke 709H 能讓幾乎任何的技術(shù)人員維修和支持 HART 裝置。

Fluke 709H calibrator is designed with a user-friendly interface and a Quick-Set rotary encoder knob. The tool reduces the measurement or output time of voltage and current and the charging time of the circuit. Protective leather jackets are especially suitable for technicians to hold. Large backlight displays are easy to read, even in dark and narrow working areas. The characteristics of 709H calibrator:

0.01% reading accuracy

Designed to be compact and durable, powered by six standard AAA batteries

Visual user interface, Quick-Set knob can be quickly set up, easy to use

250 Optional Resistors for Built-in HART Communication

24 V DC circuit power supply with mA measurement mode (-25%-125%)

The current range resolution is 1 A and the voltage range resolution is 1 mV.

All measurements are made by simple two-wire connection.

Automatic shutdown to extend battery life (up to 30 minutes)

Variable step and slope time (seconds)

Selection of adjustable span (0-20 mA or 4-20 mA)

Electron tube test (using% bond to simulate defined mA values)

HART specific performance includes:

Fast transmission of calibration data. 709H/Track software/cable can record all HART transmitter parameters on your device in (.csv) or (.txt) format.

Data can be recorded on a specific transmitter to facilitate troubleshooting. The data recording tool has an optional acquisition interval of 1-60 seconds and can record 9800 records or 99 individual sessions. Each data sample contains 709H measurements, all four process variables and standard state conditions.

In communication mode, users can read basic device information, perform diagnostic tests and fine-tune the calibration of most HART transmitters. In the past, this operation could only be accomplished by a dedicated communicator, a high-end multi-functional calibrator or a laptop computer equipped with a HART modem. Fluke 709H allows almost any technician to repair and support HART devices.