回路校验仪简介YHS-717/S
YHS717/S回路校准仪是对电流回路进行校准、维修和维护的。高性能解决方案。新型的快速感应旋钮使其非常快速、易用、长寿命。它和YHS707相比主要是电池采用了绿色环保型的可充电大容量锂电池！待电时间长，可节约大量运营费用！
主要特点有：
·使用快速感应旋钮，单手即可操作
·mA电源、仿真和测量功能
·0.02% 的准确度和0.001mA的分辨率
·同时显示mA和量程的百分比
·可选的步进和斜波输出
·24V回路电源，进行mA测量，包括250Ω的HART电阻器
·0-28直流电压测量·不开盖即可方便地更换电池
·紧凑的设计结构，具有可拆卸的防护套。
技术规格
电流测量
量程： 0至24mA
分辨率： 0.001mA
准确度： 0.02%读数+4个最低有效位
输出电流
范围： 0至20mA或4至 20 mA
准确度： 0.02%读数+4个最低有效位
驱动能力：1200Ω；950Ω@20mA，HART模式
电流仿真
范围：0至20mA 或4至20mA
准确度： 0.02%读数+4个最低有效位
外部回路电压要求：12-30V
回路电源 24V
电压测量
范围：0至28V DC
分辨率：1mV
准确度： 0.02%读数+4个最低有效位
YHS-717 Loop Calibrator
features
The fast, one-handed tool for loop checks. Just click to calibrate.
This feature-rich solution combines the best features push-button and knob-base loop calibrator and offers:
- Large display and simple, quick-click interface for easy one-handed operation.
- Simultaneous mA and % readout for quick, easy interpretation of readings.
- mA accuracy of 0.02%, superior to other loop calibrators in this price range.
- 1 µA resolution for mA source, simulate and measure.
- Push button 25% steps for fast, easy linearity checks.
- 0-100% “span check” for fast confirmation of zero and span.
- Selectable slow ramp, fast ramp, and step ramp to provide smooth outputs for valve slewing and loop functional tests.
- 24 volt internal loop supply, so you can power and read a transmitter at the same time without carrying a DMM.
- Measures V dc to 28 V.
- Single 9V battery that is easily changed without braking calibration seal
- 0 - 20 mA or 4 - 20 mA default start up modes.
- Innovative output adjustment dial with 1 µA and 100 resolution.
- HART ™ mode connects 250 Ω resistor in series with 24 V loop for compatibility with HART communicators.
Specifications
|
Current Measurement |
Range: |
0 to 24 mA |
|
Resolution: |
0.001 mA |
|
Accuracy: |
0.02% Rdg + 4 LSD |
|
Current Sourcing |
Range: |
0 to 20 mA or 4 to 20 mA |
|
Accuracy: |
0.02% Rdg + 4 LSD |
|
Drive Capability: |
1200 Ω; 950 Ω at 20 mA in HART mode |
|
Current Simulation |
Range: |
0 to 20 mA or 4 to 20 mA |
|
Accuracy: |
0.02% Rdg + 4 LSD |
|
Ext. loop voltage requirement: |
12-30 V |
|
Loop Power |
While measuring mA, 24 V |
|
Voltage measurement |
Range: |
0 to 28 V DC |
|
Resolution: |
1 mV |
|
Accuracy: |
0.02% Rdg + 4 LSD |
Environmental Specifications
Operating Temperature -10ºC to 55ºC
Storage Temperature -30ºC to 60ºC
Humidity (Without Condensation) 0 to 90% (0ºC to 35ºC); 0 to 70% (35ºC to 55ºC)
Temperature Coefficient -10ºC to 18ºC, 28ºC to 55ºC, ±.005% of range per ºC
Safety Specifications
Maximum voltage 30V
Mechanical & General Specifications
Size 152 x 70 x 41 mm
Weight 224 g (340 g including holster)
Batteries a group of large capcity Lithium Battery (7.4V)
Warranty Two years
Shock & Vibration per MIL-T-28800 for a Class 2 Instrument
Display current and % of span Yes
Auto step, auto ramp Yes
Span Check Yes
